# Best E-Signature APIs Software - Page 2

*By [Adam Crivello](https://research.g2.com/insights/author/adam-crivello)*


eSignature APIs provide integrations for developers to connect their companies’ software with eSignature functionality. Vendors in this space provide APIs along with thorough documentation on how to access and use those APIs. By integrating with eSignature APIs, developers grant their organization the ability to gather signatures on documents shared electronically, eliminating the need for physical documents to record signatures.

eSignature APIs are directly related to [E-Signature software](https://www.g2.com/categories/e-signature). While E-Signature software provides an out-of-the-box solution, eSignature APIs give developers the tools to integrate eSignature functionality in a more customized way.

To qualify for inclusion in the eSignature APIs category, a product must:

- Host APIs allowing developers to integrate eSignature functionalities in their apps
- Provide documentation around API interactions and extensibility






## G2 Grid® for E-Signature APIs Software
![G2 Grid® for E-Signature APIs Software plotting products by satisfaction and market presence](https://www.g2.com/categories/e-signature-apis/grids.png?focus%5B%5D=1282081&focus%5B%5D=324&focus%5B%5D=1450270&focus%5B%5D=151836&focus%5B%5D=16016&focus%5B%5D=773&focus%5B%5D=1282067&focus%5B%5D=1282263)
Highlighted products: PandaDoc API, Docusign, Signify, Foxit eSign, GetAccept, OneSpan Sign, Adobe Acrobat Sign API, and DropBox Sign API.
Underlying data: [Grid® JSON](https://www.g2.com/categories/e-signature-apis/grids.json?focus%5B%5D=pandadoc-api&focus%5B%5D=docusign&focus%5B%5D=signify-signify&focus%5B%5D=foxit-esign&focus%5B%5D=getaccept&focus%5B%5D=onespan-sign&focus%5B%5D=adobe-acrobat-sign-api&focus%5B%5D=dropbox-sign-api)


## How Many E-Signature APIs Software Products Does G2 Track?
**Total Products under this Category:** 38

### Category Stats (Jul 2026)
- **Average Rating**: 4.53/5 The average rating of products in this category, based on all submitted ratings
- **Top Trending Product**: Anvil (+0.21%) - Among all products in this category, Anvil recorded the largest rating increase compared to last month
*Last updated: July 17, 2026*


## How Does G2 Rank E-Signature APIs Software Products?

**Why You Can Trust G2's Software Rankings:**

- 30 Analysts and Data Experts
- 10,300+ Authentic Reviews
- 38+ Products
- Unbiased Rankings

G2's software rankings are built on verified user reviews, rigorous moderation, and a consistent research methodology maintained by a team of analysts and data experts. Each product is measured using the same transparent criteria, with no paid placement or vendor influence. While reviews reflect real user experiences, which can be subjective, they offer valuable insight into how software performs in the hands of professionals. Together, these inputs power the G2 Score, a standardized way to compare tools within every category.


## Which E-Signature APIs Software Is Best for Your Use Case?

- **Leader:** [PandaDoc API](https://www.g2.com/products/pandadoc-api/reviews)
- **Highest Performer:** [Signify](https://www.g2.com/products/signify-signify/reviews)
- **Easiest to Use:** [PandaDoc API](https://www.g2.com/products/pandadoc-api/reviews)
- **Top Trending:** [Yousign](https://www.g2.com/products/yousign/reviews)
- **Best Free Software:** [PandaDoc API](https://www.g2.com/products/pandadoc-api/reviews)


---

**Sponsored**

### altaFlow

altaFlow generates custom docs with a click, integrates eSignatures, creates webforms, and more without coding. It’s the ultimate tool to simplify, automate, and elevate your workflows.



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---

## What Are the Top-Rated E-Signature APIs Software Products in 2026?
### 1. [BoldSign eSignature API](https://www.g2.com/products/boldsign-esignature-api/reviews)
Blazing Fast eSignature API Easily embed the entire eSignature process within your apps. We have over 20 years of experience creating various APIs consumed by millions of developers.


**Average Rating:** 3.8/5.0
**Total Reviews:** 2
**How Do G2 Users Rate BoldSign eSignature API?**

- **Ease of Use:** 9.2/10 (Category avg: 8.9/10)
- **Quality of Support:** 7.5/10 (Category avg: 8.9/10)

**Who Is the Company Behind BoldSign eSignature API?**

- **Seller:** [Syncfusion](https://www.g2.com/sellers/syncfusion)
- **Year Founded:** 2001
- **HQ Location:** Morrisville, North Carolina
- **Twitter:** @Syncfusion (11,907 Twitter followers)
- **LinkedIn® Page:** https://www.linkedin.com/company/123064/ (2,658 employees on LinkedIn®)

**Who Uses This Product?**
- **Company Size:** 100% Mid-Market



#### What Are Recent G2 Reviews of BoldSign eSignature API?

**"[Reliable E-Sign](https://www.g2.com/survey_responses/boldsign-esignature-api-review-8821170)"**

**Rating:** 4.0/5.0 stars
*— Tanay s.*

[Read full review](https://www.g2.com/survey_responses/boldsign-esignature-api-review-8821170)

---



### 2. [TurboDocx](https://www.g2.com/products/turbodocx/reviews)
TurboDocx is an AI-powered platform for proposals, quoting, document generation, e-signatures, and APIs—built to automate the entire document lifecycle from data to signed agreement. Teams use TurboDocx to generate proposals, statements of work (SOWs), quotes, contracts, and slide decks by pulling structured data from CRMs, project management tools, spreadsheets, and internal knowledge bases. Dynamic templates, reusable content blocks, and AI-assisted drafting ensure documents are accurate, consistent, and on-brand—without manual copy-paste work. TurboDocx includes native quoting and pricing workflows, enabling teams to assemble line items, pricing tables, and commercial terms directly into proposals and contracts. Once finalized, documents can be sent for signature using built-in e-signature capabilities, creating a seamless flow from quote → proposal → signed agreement. The platform is API-first and developer-friendly, offering robust APIs and SDKs that allow teams to embed document generation, quoting, and e-signature directly into their own products, portals, and internal systems. TurboDocx supports both no-code web workflows and fully programmable automation, making it flexible enough for sales teams and powerful enough for engineering teams. TurboDocx is used by professional services firms, MSPs, and SaaS platforms that need end-to-end, composable document automation—whether as a standalone tool or embedded infrastructure.


**Average Rating:** 4.9/5.0
**Total Reviews:** 10
**How Do G2 Users Rate TurboDocx?**

- **Ease of Use:** 9.8/10 (Category avg: 8.9/10)
- **Quality of Support:** 10.0/10 (Category avg: 8.9/10)
- **Has the product been a good partner in doing business?:** 10.0/10 (Category avg: 8.9/10)
- **Ease of Setup:** 9.4/10 (Category avg: 8.8/10)

**Who Is the Company Behind TurboDocx?**

- **Seller:** [TurboDocx](https://www.g2.com/sellers/turbodocx)
- **HQ Location:** Jupiter, Florida 
- **Twitter:** @TurboDocx (3 Twitter followers)
- **LinkedIn® Page:** https://www.linkedin.com/company/turbodocx/ (6 employees on LinkedIn®)
- **Ownership:** Private

**Who Uses This Product?**
- **Company Size:** 80% Small-Business, 30% Mid-Market


#### What Are TurboDocx's Pros and Cons?

**Pros:**

- Features (11 reviews)
- Automation (9 reviews)
- Ease of Use (9 reviews)
- Document Automation (8 reviews)
- Document Management (8 reviews)

**Cons:**

- Integration Issues (6 reviews)
- Learning Curve (5 reviews)
- Missing Features (5 reviews)
- AI Performance (4 reviews)
- Difficult Setup (4 reviews)


### What Do G2 Reviewers Say About TurboDocx?
*AI-generated summary from verified user reviews*

**Pros:**

- Users appreciate the **robust API and SDKs** of TurboDocx, enabling seamless integration and efficient automation in document generation.
- Users praise the **automation capabilities** of TurboDocx, transforming sales processes into fast, efficient workflows.
- Users appreciate the **ease of use** of TurboDocx, enjoying smooth integrations and intuitive document management processes.
- Users value the **document automation** capabilities of TurboDocx, significantly improving efficiency and accuracy in generating custom documents.
- Users value the **robust REST API and multi-language SDKs** of TurboDocx for seamless document integration and automation.

**Cons:**

- Users face **integration issues** requiring time to configure advanced templates and align AI-generated content with specific terminology.
- Users note that the **learning curve** can be steep, especially for teams not tech-savvy, needing initial setup time.
- Users desire more **advanced collaborative features** and better integration capabilities to enhance their drafting experience with TurboDocx.
- Users highlight that the **AI performance** occasionally requires manual tweaks for niche terminology and specific content types.
- Users experience a **difficult setup** process, requiring time to configure advanced templates and ensure accuracy in language use.

#### What Are Recent G2 Reviews of TurboDocx?

**"[Excellent UI, Powerful Integrations, and Incredible Support](https://www.g2.com/survey_responses/turbodocx-review-12978233)"**

**Rating:** 5.0/5.0 stars
*— mason a.*

[Read full review](https://www.g2.com/survey_responses/turbodocx-review-12978233)

---

**"[TurboDocx: One-Stop Quoting & Signing with Top-Tier, Responsive Support](https://www.g2.com/survey_responses/turbodocx-review-12671221)"**

**Rating:** 5.0/5.0 stars
*— Joey S.*

[Read full review](https://www.g2.com/survey_responses/turbodocx-review-12671221)

---



### 3. [Yoti Sign APIs](https://www.g2.com/products/yoti-sign-apis/reviews)
We’re here to help you get your business set up with our secure platform using our portals, one of our seven web SDKs or our simple API's.


**Average Rating:** 4.8/5.0
**Total Reviews:** 2
**How Do G2 Users Rate Yoti Sign APIs?**

- **Ease of Use:** 8.3/10 (Category avg: 8.9/10)
- **Quality of Support:** 6.7/10 (Category avg: 8.9/10)
- **Has the product been a good partner in doing business?:** 6.7/10 (Category avg: 8.9/10)
- **Ease of Setup:** 8.3/10 (Category avg: 8.8/10)

**Who Is the Company Behind Yoti Sign APIs?**

- **Seller:** [Yoti](https://www.g2.com/sellers/yoti)
- **Year Founded:** 2014
- **HQ Location:** London, England
- **Twitter:** @getyoti (6,944 Twitter followers)
- **LinkedIn® Page:** https://www.linkedin.com/company/9428931/ (458 employees on LinkedIn®)

**Who Uses This Product?**
- **Company Size:** 50% Small-Business



#### What Are Recent G2 Reviews of Yoti Sign APIs?

**"[Is Yoti Sign good for digital id and e-signature](https://www.g2.com/survey_responses/yoti-sign-apis-review-9980944)"**

**Rating:** 4.5/5.0 stars
*— Verified User in Information Technology and Services*

[Read full review](https://www.g2.com/survey_responses/yoti-sign-apis-review-9980944)

---

**"[YotiSign API integration is simple and well supported](https://www.g2.com/survey_responses/yoti-sign-apis-review-4722766)"**

**Rating:** 5.0/5.0 stars
*— Iain H.*

[Read full review](https://www.g2.com/survey_responses/yoti-sign-apis-review-4722766)

---



### 4. [BlueInk](https://www.g2.com/products/blueink/reviews)
Blueink is the #1 DocuSign alternative. Our mission at Blueink is to provide top-tier customer-centric eSignature products and support, with a hyperfocus on affordability and ease of use. Standard: $15 per month per user Business Pro: $30 per month per user Blueink Unlimited: $40 per month per user Enterprise: Contact us for a Custom Quote


**Average Rating:** 4.6/5.0
**Total Reviews:** 8
**How Do G2 Users Rate BlueInk?**

- **Ease of Use:** 10.0/10 (Category avg: 8.9/10)
- **Quality of Support:** 8.3/10 (Category avg: 8.9/10)
- **Has the product been a good partner in doing business?:** 10.0/10 (Category avg: 8.9/10)
- **Ease of Setup:** 10.0/10 (Category avg: 8.8/10)

**Who Is the Company Behind BlueInk?**

- **Seller:** [BlueInk Technologies](https://www.g2.com/sellers/blueink-technologies)
- **Year Founded:** 2014
- **HQ Location:** Scottsdale  , AZ
- **LinkedIn® Page:** https://www.linkedin.com/company/10959871 (36 employees on LinkedIn®)

**Who Uses This Product?**
- **Company Size:** 80% Small-Business, 20% Mid-Market


#### What Are BlueInk's Pros and Cons?

**Pros:**

- Affordable (1 reviews)
- Customer Support (1 reviews)
- Ease of Use (1 reviews)
- Easy Integration (1 reviews)

**Cons:**

- Email Issues (1 reviews)
- Expensive (1 reviews)


### What Do G2 Reviewers Say About BlueInk?
*AI-generated summary from verified user reviews*

**Pros:**

- Users find BlueInk to be **affordable** , providing excellent value for online document signing without breaking the bank.
- Users appreciate the **responsive customer support** of BlueInk, enhancing their experience with efficient problem resolution.
- Users find BlueInk to have **excellent ease of use** , making online document signing seamless and straightforward.
- Users find BlueInk's **easy integration** with a user-friendly API enhances their overall experience and efficiency.

**Cons:**

- Users experience **email issues** with BlueInk, including delays in sending and emails landing in spam folders.
- Users find BlueInk **expensive** with no free version, leading to concerns about its value given performance issues.

#### What Are Recent G2 Reviews of BlueInk?

**"[Sign your documents online](https://www.g2.com/survey_responses/blueink-review-9540945)"**

**Rating:** 4.5/5.0 stars
*— sam p.*

[Read full review](https://www.g2.com/survey_responses/blueink-review-9540945)

---

**"[Simple and Secure eSignature Solution for Fast Document Workflows](https://www.g2.com/survey_responses/blueink-review-11387617)"**

**Rating:** 5.0/5.0 stars
*— Imrul K.*

[Read full review](https://www.g2.com/survey_responses/blueink-review-11387617)

---


#### What Are G2 Users Discussing About BlueInk?

- [What is BlueInk used for?](https://www.g2.com/discussions/what-is-blueink-used-for)

### 5. [DocSpring](https://www.g2.com/products/docspring/reviews)
DocSpring provides a PDF filling API that makes it easy for programmers to fill out and generate PDF documents.


**Average Rating:** 4.0/5.0
**Total Reviews:** 1

**Who Is the Company Behind DocSpring?**

- **Seller:** [DocSpring](https://www.g2.com/sellers/docspring)
- **Year Founded:** 1994
- **HQ Location:** Dijon, FR
- **LinkedIn® Page:** http://www.linkedin.com/company/formapi-bfc (75 employees on LinkedIn®)

**Who Uses This Product?**
- **Company Size:** 100% Mid-Market



#### What Are Recent G2 Reviews of DocSpring?

**"[Makes configuration easy](https://www.g2.com/survey_responses/docspring-review-5137829)"**

**Rating:** 4.0/5.0 stars
*— Verified User in Information Technology and Services*

[Read full review](https://www.g2.com/survey_responses/docspring-review-5137829)

---


#### What Are G2 Users Discussing About DocSpring?

- [What is FormAPI used for?](https://www.g2.com/discussions/what-is-formapi-used-for)

### 6. [Goodflag](https://www.g2.com/products/goodflag/reviews)
Goodflag est prestataire de services de confiance qualifié, fondé en 2005, et spécialisé dans la signature électronique. L’entreprise développe des solutions innovantes permettant de signer, faire signer et cacheter tout type de document, en parfaite conformité avec la réglementation eIDAS. Goodflag s'adresse aux entreprises de toutes tailles et de tous secteur et organisations publiques qui cherchent à optimiser leurs processus de signature et de gestion documentaire. Services clés : - Signature électronique : simplifie et sécurise le processus de signature de documents. - Cachetage électronique : assure l'intégrité et l'authenticité des documents électroniques. Positionnement et forces : - Souveraineté numérique : solutions 100% françaises, assurant une indépendance totale. - Expertise et accompagnement : offres conformes au règlement eIDAS, garantissant la sécurité et la conformité des signatures électroniques. - Interopérabilité : flexibilité d'intégration avec diverses plateformes et services, facilitant ainsi l'adoption de leurs solutions. - Innovant : Goodflag est arrivée en tête du classement des Leaders de l'innovation 2024 (par Les Echos et Statista). En conclusion, Goodflag se positionne comme un acteur clé dans le domaine de la signature électronique, offrant des solutions robustes et conformes aux entreprises et organisations publiques.


**Average Rating:** 3.5/5.0
**Total Reviews:** 1
**How Do G2 Users Rate Goodflag?**

- **Ease of Use:** 3.3/10 (Category avg: 8.9/10)
- **Quality of Support:** 6.7/10 (Category avg: 8.9/10)
- **Has the product been a good partner in doing business?:** 10.0/10 (Category avg: 8.9/10)
- **Ease of Setup:** 5.0/10 (Category avg: 8.8/10)

**Who Is the Company Behind Goodflag?**

- **Seller:** [Goodflag](https://www.g2.com/sellers/goodflag)
- **Year Founded:** 2005
- **HQ Location:** St André les Vergers, FR
- **LinkedIn® Page:** https://fr.linkedin.com/company/goodflag (40 employees on LinkedIn®)

**Who Uses This Product?**
- **Company Size:** 100% Small-Business





### 7. [QuickSigner](https://www.g2.com/products/quicksigner/reviews)
QuickSigner is an ISO 27001–certified, cloud-based electronic signature platform designed for businesses that want simple, secure, and truly affordable document signing — without usage limits or surprise costs. Unlike traditional electronic signature platforms that charge per envelope or per signature, QuickSigner offers unlimited document signing on every plan. This makes it especially attractive for fast-growing teams, legal departments, HR, sales organizations, and SaaS companies that rely on high document volumes and need predictable pricing. One of QuickSigner’s differentiators is its developer-friendly API, with pricing starting at just $0.30 per envelope — roughly 20% of the average market cost. This allows businesses to integrate e-signatures into their own applications or workflows without the heavy financial burden typically associated with enterprise e-signature tools. QuickSigner uses Adobe-AATL, legally binding electronic signatures, fully compliant with the PAdES standard for Advanced Electronic Signatures, ensuring that signed documents meet strict legal, security, and regulatory requirements across the USA and beyond. The platform is built with security at its core and adheres to ISO 27001 standards, giving peace of mind to security-conscious teams. Key features include customizable signature fields, reusable document templates, bulk sending, SMS-based signing, and a powerful API for seamless integrations. Users consistently appreciate the clean, intuitive interface, which makes the signing process easy to navigate even for non-technical users. Documents can be sent and signed in minutes, reducing turnaround times and operational friction. QuickSigner is frequently chosen by teams looking for a cost-effective alternative to legacy e-signature platforms, without compromising on compliance, reliability, or user experience. Whether you’re a small business scaling operations or an enterprise seeking to optimize signing costs, QuickSigner delivers strong ROI from day one. Most comparisons of e-signature software are written for the sender — the person who uploads the document and hits "send." Templates, dashboards, integrations, pricing tiers. All useful. But there's a second person in every transaction whose experience almost never gets discussed, and who quietly decides whether the whole thing works: the signer. The signer didn't choose your software. They didn't read the onboarding. They got an email, often on their phone, often while busy, and they have exactly one question — how fast can I make this go away? Everything good or bad about an e-signature tool shows up in that moment. And this is where I think most people evaluate the wrong things. A bad tool treats the signer like a user it can recruit. It asks them to create an account before they can sign. It pushes them to download an app. It opens a cluttered interface where it's not obvious what to click, makes them pinch-and-zoom on a phone to find the signature box, or forces them through identity hoops that feel disproportionate to signing a one-page NDA. Every one of those steps is a place where a real person closes the tab. The data backs this up: friction in the signing flow is consistently cited as the biggest barrier to completion, and "every extra click or confusing step costs you the deal." A signature you don't collect is worth nothing, no matter how powerful the sender-side features were. A good tool is almost invisible to the signer. They click a secure link, the document opens cleanly on whatever device they're holding, the fields they need to fill are obvious and in order, and they're done in under a minute — no account, no install, no token, no friction. Crucially, "easy" and "secure" are not opposites here: the best tools quietly capture the audit trail, timestamps, IP, and a tamper-evident seal in the background, so the signer gets a frictionless experience and you get a legally defensible document. The signer should never have to think about the machinery; the machinery should still be doing its job. So when you evaluate e-signature software, run the test that actually predicts adoption: send yourself a document and sign it from your phone, as if you'd never seen the tool before. Count the taps. Notice every moment you hesitate. That experience is what you're asking every client, candidate, and counterparty to go through — and it's a better predictor of whether documents actually get signed than any feature checklist. This is the principle we built QuickSigner around. We think the person signing should be able to do it in seconds — from any device, with no account to create, no app to install, and no certificate token — while the sender still gets Adobe-certified, PAdES-standard signatures, ISO 27001-grade security, and a complete audit trail on every document. Our mission is simple: make signing effortless for the people you're asking to sign, without ever compromising on whether it holds up legally. Because the easiest signature to collect is the one that didn't make anyone stop and think. A free trial is available on all plans, making it easy to test the platform and experience the benefits first hand. Visit QuickSigner.com and start signing smarter, faster, and without limits.


**Average Rating:** 5.0/5.0
**Total Reviews:** 2
**How Do G2 Users Rate QuickSigner?**

- **Ease of Use:** 10.0/10 (Category avg: 8.9/10)
- **Quality of Support:** 10.0/10 (Category avg: 8.9/10)
- **Ease of Setup:** 10.0/10 (Category avg: 8.8/10)

**Who Is the Company Behind QuickSigner?**

- **Seller:** [INNOVORIS LABS](https://www.g2.com/sellers/innovoris-labs)
- **HQ Location:** N/A
- **LinkedIn® Page:** https://www.linkedin.com/company/No-Linkedin-Presence-Added-Intentionally-By-DataOps (1 employees on LinkedIn®)

**Who Uses This Product?**
- **Company Size:** 100% Small-Business


#### What Are QuickSigner's Pros and Cons?

**Pros:**

- Intuitive (2 reviews)
- Time Saving (2 reviews)
- Affordable (1 reviews)
- Customer Support (1 reviews)
- Ease of Use (1 reviews)



### What Do G2 Reviewers Say About QuickSigner?
*AI-generated summary from verified user reviews*

**Pros:**

- Users find QuickSigner **intuitive and fast** , simplifying document signing and benefiting small businesses significantly.
- Users love the **time-saving efficiency** of QuickSigner, making document signing quick and hassle-free.
- Users love the **affordable pricing** of QuickSigner, making it a great value for seamless document automation.
- Users appreciate the **amazing customer support** for quick responses and excellent assistance with API setup.
- Users love the **ease of use** of QuickSigner, enabling quick and intuitive document signing for small businesses.


#### What Are Recent G2 Reviews of QuickSigner?

**"[Great Software and Customer Service!](https://www.g2.com/survey_responses/quicksigner-review-11388958)"**

**Rating:** 5.0/5.0 stars
*— Gilbert A.*

[Read full review](https://www.g2.com/survey_responses/quicksigner-review-11388958)

---

**"[Intuitive, Easy to use, their name is legit. Hightly Recommend.](https://www.g2.com/survey_responses/quicksigner-review-12249887)"**

**Rating:** 5.0/5.0 stars
*— Verified User in Information Technology and Services*

[Read full review](https://www.g2.com/survey_responses/quicksigner-review-12249887)

---



### 8. [Signaturit API](https://www.g2.com/products/signaturit-api/reviews)
With Signaturit’s API we want to help you speed up the adoption of eSignatures and facilitate the integration of our online document signing process into your workflows.


**Average Rating:** 5.0/5.0
**Total Reviews:** 1
**How Do G2 Users Rate Signaturit API?**

- **Ease of Use:** 10.0/10 (Category avg: 8.9/10)
- **Quality of Support:** 10.0/10 (Category avg: 8.9/10)
- **Has the product been a good partner in doing business?:** 8.3/10 (Category avg: 8.9/10)
- **Ease of Setup:** 8.3/10 (Category avg: 8.8/10)

**Who Is the Company Behind Signaturit API?**

- **Seller:** [Signaturit Group, a Namirial Company](https://www.g2.com/sellers/signaturit-group-a-namirial-company)
- **Year Founded:** 2013
- **HQ Location:** Barcelona, Catalonia
- **Twitter:** @signaturit (2,380 Twitter followers)
- **LinkedIn® Page:** https://www.linkedin.com/company/3266152/ (352 employees on LinkedIn®)

**Who Uses This Product?**
- **Company Size:** 100% Enterprise



#### What Are Recent G2 Reviews of Signaturit API?

**"[Easy and powerful sign API with a competitive price](https://www.g2.com/survey_responses/signaturit-api-review-5133933)"**

**Rating:** 5.0/5.0 stars
*— Juan Antonio W.*

[Read full review](https://www.g2.com/survey_responses/signaturit-api-review-5133933)

---



### 9. [Certinal e-Sign](https://www.g2.com/products/certinal-e-sign/reviews)
Certinal is an enterprise-grade eSignature platform purpose-built for healthcare and other regulated industries. With integrations across 1,040+ applications, it is designed for high-volume, multi-stakeholder environments where every signature transaction requires structured routing, multi-party authorization, signer identity verification, and audit-defensible evidence. Across the care journey, Certinal powers eSignature workflows for: \*Patient intake, registration, and financial authorization \*Informed consent for procedures — with witness and clinician countersign \*Physician sign-offs on discharge summaries, treatment plans, and clinical orders \*Telehealth and remote pre-visit document signing \*Diagnostics and lab authorization \*HIPAA authorizations, privacy notices, and release of information \*Clinical trial and research participant agreements Clinical ops, compliance and privacy officers, front office, nursing, HIM, and IT operate within governed templates standardized across multi-facility health systems. Signing is mobile-first and multilingual, meeting patients at the point of care or ahead of arrival. Every transaction generates an evidence pack linking form version, signer identity, timestamps, and complete activity log. Regulatory and compliance coverage spans eIDAS, ESIGN Act, UETA, HIPAA, CMS-0053-F (the 2026 healthcare e-signature mandate), GDPR, DPDP Act, PDPA, PDPL, CFR Part 11, SOC 2, and ISO 27001. Platform mechanisms include tamper-evident sealing, immutable audit trails, cryptographic integrity, signer authentication, exportable evidence packs, and configurable data residency. Beyond healthcare, Certinal serves regulated verticals with equal depth: BFSI: Loan agreements, account opening, insurance policy execution, and KYC signing with multi-signer routing and field-level access controls across compliance, legal, and relationship managers. Aligned to RBI Digital Lending Guidelines mandating IT Act-compliant digital signatures, GLBA for financial data safeguards, DORA for IT risk resilience across the financial sector, and PCI DSS. Legal & real estate: Engagement letters, NDAs, lease agreements, and closing documents with sequential signing, deadline tracking, and dispute-ready evidence packs. ESIGN and UETA require specific handling for electronic equivalents to promissory notes secured by real property, and state-level rules may still require notarization for deed transfers Certinal's audit trails and identity verification support compliance across jurisdictions. Government & public sector: Citizen-facing forms, procurement contracts, and inter-agency approvals — with role-based access, retention policies, and audit trails aligned to public record requirements. Certinal is API-driven and embeds into existing systems — built for enterprise-scale deployment across departments, facilities, and geographies. Request a demo to see how it maps to your workflows.


**Average Rating:** 4.0/5.0
**Total Reviews:** 1

**Who Is the Company Behind Certinal e-Sign?**

- **Seller:** [Certinal](https://www.g2.com/sellers/certinal-65129f19-bff0-43d9-bbd3-e190f1f3d2a8)
- **Year Founded:** 2021
- **HQ Location:** Wilmington, US
- **LinkedIn® Page:** https://www.linkedin.com/company/certinal/ (24 employees on LinkedIn®)

**Who Uses This Product?**
- **Company Size:** 100% Enterprise



#### What Are Recent G2 Reviews of Certinal e-Sign?

**"[A good eSignature solution for your enterprise needs](https://www.g2.com/survey_responses/certinal-e-sign-review-6935819)"**

**Rating:** 4.0/5.0 stars
*— Verified User in Computer Software*

[Read full review](https://www.g2.com/survey_responses/certinal-e-sign-review-6935819)

---



### 10. [Docuten](https://www.g2.com/products/docuten/reviews)
We transform our clients into “paperless companies” through the digitalisation of their administrative processes. Docuten offers digital signature, electronic invoicing and payments, reducing costs by 50% and offering an implementation rate 2.5 times faster than working with several different providers.



**Who Is the Company Behind Docuten?**

- **Seller:** [Docuten](https://www.g2.com/sellers/docuten)
- **HQ Location:** La Coruña, ES
- **LinkedIn® Page:** https://linkedin.com/company/docuten (45 employees on LinkedIn®)

**Who Uses This Product?**
- **Company Size:** 33% Mid-Market, 33% Small-Business



#### What Are Recent G2 Reviews of Docuten?

**"[Why you should use docuten](https://www.g2.com/survey_responses/docuten-review-9848420)"**

**Rating:** 5.0/5.0 stars
*— Verified User in Computer Software*

[Read full review](https://www.g2.com/survey_responses/docuten-review-9848420)

---

**"[Docuten API: Streamlining Electronic Signature](https://www.g2.com/survey_responses/docuten-review-9771986)"**

**Rating:** 4.5/5.0 stars
*— Hemant d.*

[Read full review](https://www.g2.com/survey_responses/docuten-review-9771986)

---



### 11. [Foxit Document Workflow APIs](https://www.g2.com/products/foxit-document-workflow-apis/reviews)
Foxit offers a comprehensive suite of cloud native APIs designed to automate, secure, and modernize every stage of the document lifecycle. Built on scalable REST architecture, these APIs give developers and enterprise teams the tools to generate, transform, sign, and display documents directly within their applications, eliminating manual processes and ensuring fast, consistent digital workflows. The Foxit PDF Services API delivers high performance automation for PDF creation, conversion, extraction, and optimization at scale. Ideal for operations teams handling bulk document tasks, it supports everything from large volume report generation to precise data extraction and certified redaction. With encryption in transit and at rest, role-based access, PDF/A export, and infrastructure that meets SOC 2 Type II and HIPAA-ready requirements, the API enables secure deployment in even the most regulated environments. For organizations that rely on consistent and personalized document output, the Foxit Document Generation API streamlines the production of professional PDFs and DOCX files using dynamic templates. Real time data from CRMs, ERPs, or online forms flows seamlessly into branded layouts built in Word or HTML. Developers use this API to automate quotes, contracts, disclosures, onboarding forms, and other documents where accuracy and compliance are essential. Enterprise-grade security—including TLS 1.2+, AES-256 encryption, and SOC 2 Type II–certified infrastructure—ensures protected, standards-aligned document creation. The Foxit eSign API embeds fully auditable, legally binding eSignature workflows directly into applications and business systems. It offers complete control over signer flows, authentication, approvals, and audit trails, enabling teams to power customer facing signing experiences or large scale internal approval processes. Supporting HIPAA, SOC 2, eIDAS, ESIGN, and 21 CFR Part 11 compliance, the API helps organizations accelerate agreements without sacrificing security or regulatory alignment. Rounding out the platform, the Foxit PDF Embed API provides seamless, customizable in-app PDF viewing with support for annotations, form filling, and secure access controls. With lightweight JavaScript integration and options for modifying toolbars, permissions, and themes, developers can deliver a fully branded document experience. The API is built for secure environments requiring password protection, RBAC, SAML-based SSO, PDF/A output, and HIPAA-ready deployment. Together, Foxit’s APIs equip organizations with a powerful, secure, and flexible foundation for end-to-end document automation and digital transformation.



**Who Is the Company Behind Foxit Document Workflow APIs?**

- **Seller:** [Foxit](https://www.g2.com/sellers/foxit)
- **Company Website:** https://www.foxit.com/
- **Year Founded:** 2001
- **HQ Location:** Fremont, CA
- **Twitter:** @foxitsoftware (6,226 Twitter followers)
- **LinkedIn® Page:** https://www.linkedin.com/company/foxit-corporation/ (569 employees on LinkedIn®)






### 12. [Secure Exchanges](https://www.g2.com/products/secure-exchanges/reviews)
Secure Exchanges is a Canadian cybersecurity company founded to address the growing need for secure digital communications in Canada and internationally. The company develops and operates a cloud platform dedicated to protecting sensitive data exchanges. Its solutions serve businesses, professional firms, financial institutions, government agencies, and healthcare organizations that need to safeguard the confidentiality of their daily communications. The platform is available in English and French. The platform offers three core capabilities: end-to-end encrypted email, secure large file transfer supporting files up to 25 GB, and Adobe AATL-certified digital signatures. All communications are protected by AES 256 encryption and a zero-knowledge architecture, meaning neither Secure Exchanges nor any third party can access exchanged data or encryption keys. The solution integrates directly into Outlook and Gmail as a plugin, requires no IT team for deployment, and allows recipients to receive and reply securely without a license. Secure Exchanges addresses a critical challenge for organizations subject to confidentiality requirements: securing sensitive data exchanges without adding complexity to existing workflows. By integrating into the email tools already in use, the platform eliminates the friction typically associated with encrypted communications. Compliance with Quebec's Law 25 and the European GDPR, combined with SOC 2 Type II certification, enables organizations to meet their regulatory obligations for personal information protection and data security.



**Who Is the Company Behind Secure Exchanges?**

- **Seller:** [Secure Exchanges](https://www.g2.com/sellers/secure-exchanges)
- **Year Founded:** 2015
- **HQ Location:** Drummondville, CA
- **LinkedIn® Page:** https://www.linkedin.com/company/secure-exchanges/ (12 employees on LinkedIn®)






### 13. [SIGNiX](https://www.g2.com/products/signix/reviews)
We’re set apart by our Independent e-Signature™ solution, in which the e-signature’s evidence is embedded in the signed document, not linked to an external server, as is the case with many dependent e-signature vendors. This means that the legal evidence behind our Independent e-Signature™ is accessible offline and forever remains with the document, so users have control over their e-signatures and the documents in which these signatures reside. Independent e-Signatures™ also adhere to international, published standards, not private propriety standards – further supporting the perpetual validity of Independent e-Signatures™, as standards in the public domain will always be discoverable, even if they fall into disuse. We also give users complete transparency of the signing process with immediate and complete access to the legal evidence supporting e-signatures’ validity from the first signature on.


**Average Rating:** 4.0/5.0
**Total Reviews:** 3
**How Do G2 Users Rate SIGNiX?**

- **Ease of Use:** 8.3/10 (Category avg: 8.9/10)
- **Quality of Support:** 10.0/10 (Category avg: 8.9/10)

**Who Is the Company Behind SIGNiX?**

- **Seller:** [SIGNiX](https://www.g2.com/sellers/signix)
- **Year Founded:** 2002
- **HQ Location:** Chattanooga, US
- **LinkedIn® Page:** https://www.linkedin.com/company/signix (38 employees on LinkedIn®)

**Who Uses This Product?**
- **Company Size:** 67% Small-Business, 33% Enterprise



#### What Are Recent G2 Reviews of SIGNiX?

**"[From a Title Company side, SIGNiX is the perfect mobile notary.](https://www.g2.com/survey_responses/signix-review-8878745)"**

**Rating:** 5.0/5.0 stars
*— Jenny P.*

[Read full review](https://www.g2.com/survey_responses/signix-review-8878745)

---




## What Is E-Signature APIs Software?

[Development Software](https://www.g2.com/categories/development)

## What Software Categories Are Similar to E-Signature APIs Software?

- [E-Signature Software](https://www.g2.com/categories/e-signature)