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Best Unified APIs Software for Medium-Sized Businesses

Adam Crivello
AC
Researched and written by Adam Crivello

Products classified in the overall Unified APIs category are similar in many regards and help companies of all sizes solve their business problems. However, medium-sized business features, pricing, setup, and installation differ from businesses of other sizes, which is why we match buyers to the right Medium-Sized Business Unified APIs to fit their needs. Compare product ratings based on reviews from enterprise users or connect with one of G2's buying advisors to find the right solutions within the Medium-Sized Business Unified APIs category.

In addition to qualifying for inclusion in the Unified APIs Software category, to qualify for inclusion in the Medium-Sized Business Unified APIs Software category, a product must have at least 10 reviews left by a reviewer from a medium-sized business.

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Best Unified APIs Software At A Glance

Best for Small Businesses:
Best for Mid-Market:
Highest User Satisfaction:
Best Free Software:
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Highest User Satisfaction:
Best Free Software:

G2 takes pride in showing unbiased reviews on user satisfaction in our ratings and reports. We do not allow paid placements in any of our ratings, rankings, or reports. Learn about our scoring methodologies.

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8 Listings in Unified APIs Available
(248)4.7 out of 5
Optimized for quick response
2nd Easiest To Use in Unified APIs software
Entry Level Price:Free
  • Overview
    Expand/Collapse Overview
  • Product Description
    How are these determined?Information
    This description is provided by the seller.

    Merge Unified is the leading Unified API for thousands of organizations, including frontier LLMs, Fortune 500 organizations, and other B2B SaaS companies. Merge Unified allows businesses to add hun

    Users
    • Software Engineer
    • CEO
    Industries
    • Computer Software
    • Information Technology and Services
    Market Segment
    • 61% Small-Business
    • 30% Mid-Market
  • Pros and Cons
    Expand/Collapse Pros and Cons
  • Merge Unified Pros and Cons
    How are these determined?Information
    Pros and Cons are compiled from review feedback and grouped into themes to provide an easy-to-understand summary of user reviews.
    Pros
    Customer Support
    71
    Ease of Use
    50
    Integrations
    48
    Integration Capabilities
    27
    Documentation
    26
    Cons
    Integration Issues
    11
    Expensive
    10
    Poor Documentation
    9
    Data Limitations
    6
    Learning Curve
    5
  • User Satisfaction
    Expand/Collapse User Satisfaction
  • Merge Unified features and usability ratings that predict user satisfaction
    9.1
    Data Processing
    Average: 8.7
    9.3
    Ease of Use
    Average: 8.8
    9.5
    Integration Breadth
    Average: 8.9
    9.6
    Professional Support
    Average: 9.1
  • Seller Details
    Expand/Collapse Seller Details
  • Seller Details
    Seller
    Merge
    Company Website
    Year Founded
    2020
    HQ Location
    San Francisco, US
    Twitter
    @merge_api
    2,371 Twitter followers
    LinkedIn® Page
    www.linkedin.com
    135 employees on LinkedIn®
Product Description
How are these determined?Information
This description is provided by the seller.

Merge Unified is the leading Unified API for thousands of organizations, including frontier LLMs, Fortune 500 organizations, and other B2B SaaS companies. Merge Unified allows businesses to add hun

Users
  • Software Engineer
  • CEO
Industries
  • Computer Software
  • Information Technology and Services
Market Segment
  • 61% Small-Business
  • 30% Mid-Market
Merge Unified Pros and Cons
How are these determined?Information
Pros and Cons are compiled from review feedback and grouped into themes to provide an easy-to-understand summary of user reviews.
Pros
Customer Support
71
Ease of Use
50
Integrations
48
Integration Capabilities
27
Documentation
26
Cons
Integration Issues
11
Expensive
10
Poor Documentation
9
Data Limitations
6
Learning Curve
5
Merge Unified features and usability ratings that predict user satisfaction
9.1
Data Processing
Average: 8.7
9.3
Ease of Use
Average: 8.8
9.5
Integration Breadth
Average: 8.9
9.6
Professional Support
Average: 9.1
Seller Details
Seller
Merge
Company Website
Year Founded
2020
HQ Location
San Francisco, US
Twitter
@merge_api
2,371 Twitter followers
LinkedIn® Page
www.linkedin.com
135 employees on LinkedIn®
(59)4.7 out of 5
Optimized for quick response
3rd Easiest To Use in Unified APIs software
Entry Level Price:Free
  • Overview
    Expand/Collapse Overview
  • Product Description
    How are these determined?Information
    This description is provided by the seller.

    Finch is a unified API and connectivity platform that connects HR, benefits, and financial applications to 250+ HRIS and payroll providers. By serving as the intermediary, Finch helps B2B companies on

    Users
    • CEO
    Industries
    • Financial Services
    • Computer Software
    Market Segment
    • 49% Small-Business
    • 39% Mid-Market
  • User Satisfaction
    Expand/Collapse User Satisfaction
  • Finch features and usability ratings that predict user satisfaction
    9.1
    Data Processing
    Average: 8.7
    9.1
    Ease of Use
    Average: 8.8
    9.1
    Integration Breadth
    Average: 8.9
    9.7
    Professional Support
    Average: 9.1
  • Seller Details
    Expand/Collapse Seller Details
  • Seller Details
    Seller
    Finch
    Company Website
    Year Founded
    2020
    HQ Location
    San Francisco, CA
    Twitter
    @tryfinch
    744 Twitter followers
    LinkedIn® Page
    www.linkedin.com
    148 employees on LinkedIn®
Product Description
How are these determined?Information
This description is provided by the seller.

Finch is a unified API and connectivity platform that connects HR, benefits, and financial applications to 250+ HRIS and payroll providers. By serving as the intermediary, Finch helps B2B companies on

Users
  • CEO
Industries
  • Financial Services
  • Computer Software
Market Segment
  • 49% Small-Business
  • 39% Mid-Market
Finch features and usability ratings that predict user satisfaction
9.1
Data Processing
Average: 8.7
9.1
Ease of Use
Average: 8.8
9.1
Integration Breadth
Average: 8.9
9.7
Professional Support
Average: 9.1
Seller Details
Seller
Finch
Company Website
Year Founded
2020
HQ Location
San Francisco, CA
Twitter
@tryfinch
744 Twitter followers
LinkedIn® Page
www.linkedin.com
148 employees on LinkedIn®
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  • Overview
    Expand/Collapse Overview
  • Product Description
    How are these determined?Information
    This description is provided by the seller.

    Kombo is a global unified API product for the future-of-work space – offering HR, ATS, and Payroll integrations out-of-the-box. Instead of having to build and maintain many APIs themselves, Kombo'

    Users
    • CTO
    • CEO
    Industries
    • Computer Software
    • Human Resources
    Market Segment
    • 58% Small-Business
    • 26% Mid-Market
  • User Satisfaction
    Expand/Collapse User Satisfaction
  • Kombo features and usability ratings that predict user satisfaction
    9.4
    Data Processing
    Average: 8.7
    9.5
    Ease of Use
    Average: 8.8
    9.3
    Integration Breadth
    Average: 8.9
    9.9
    Professional Support
    Average: 9.1
  • Seller Details
    Expand/Collapse Seller Details
  • Seller Details
    Seller
    Kombo
    Year Founded
    2022
    HQ Location
    New York, NY
    LinkedIn® Page
    www.linkedin.com
    71 employees on LinkedIn®
Product Description
How are these determined?Information
This description is provided by the seller.

Kombo is a global unified API product for the future-of-work space – offering HR, ATS, and Payroll integrations out-of-the-box. Instead of having to build and maintain many APIs themselves, Kombo'

Users
  • CTO
  • CEO
Industries
  • Computer Software
  • Human Resources
Market Segment
  • 58% Small-Business
  • 26% Mid-Market
Kombo features and usability ratings that predict user satisfaction
9.4
Data Processing
Average: 8.7
9.5
Ease of Use
Average: 8.8
9.3
Integration Breadth
Average: 8.9
9.9
Professional Support
Average: 9.1
Seller Details
Seller
Kombo
Year Founded
2022
HQ Location
New York, NY
LinkedIn® Page
www.linkedin.com
71 employees on LinkedIn®
(42)4.6 out of 5
Optimized for quick response
8th Easiest To Use in Unified APIs software
  • Overview
    Expand/Collapse Overview
  • Product Description
    How are these determined?Information
    This description is provided by the seller.

    StackOne is an integration platform for AI agents. StackOne provides hundreds out-of-the-box action-rich connectors, an infrastructure for reliable execution, and developer tools to design, ship,

    Users
    No information available
    Industries
    • Human Resources
    • E-Learning
    Market Segment
    • 60% Small-Business
    • 33% Mid-Market
  • Pros and Cons
    Expand/Collapse Pros and Cons
  • StackOne Pros and Cons
    How are these determined?Information
    Pros and Cons are compiled from review feedback and grouped into themes to provide an easy-to-understand summary of user reviews.
    Pros
    Customer Support
    22
    Easy Integrations
    21
    Integration Capabilities
    15
    Ease of Use
    14
    Documentation
    10
    Cons
    Insufficient Information
    3
    Limited Integrations
    3
    Missing Features
    3
    Software Bugs
    3
    API Limitations
    2
  • User Satisfaction
    Expand/Collapse User Satisfaction
  • StackOne features and usability ratings that predict user satisfaction
    8.2
    Data Processing
    Average: 8.7
    8.8
    Ease of Use
    Average: 8.8
    8.7
    Integration Breadth
    Average: 8.9
    9.2
    Professional Support
    Average: 9.1
  • Seller Details
    Expand/Collapse Seller Details
  • Seller Details
    Seller
    StackOne
    Company Website
    Year Founded
    2023
    HQ Location
    London, GB
    LinkedIn® Page
    www.linkedin.com
    57 employees on LinkedIn®
Product Description
How are these determined?Information
This description is provided by the seller.

StackOne is an integration platform for AI agents. StackOne provides hundreds out-of-the-box action-rich connectors, an infrastructure for reliable execution, and developer tools to design, ship,

Users
No information available
Industries
  • Human Resources
  • E-Learning
Market Segment
  • 60% Small-Business
  • 33% Mid-Market
StackOne Pros and Cons
How are these determined?Information
Pros and Cons are compiled from review feedback and grouped into themes to provide an easy-to-understand summary of user reviews.
Pros
Customer Support
22
Easy Integrations
21
Integration Capabilities
15
Ease of Use
14
Documentation
10
Cons
Insufficient Information
3
Limited Integrations
3
Missing Features
3
Software Bugs
3
API Limitations
2
StackOne features and usability ratings that predict user satisfaction
8.2
Data Processing
Average: 8.7
8.8
Ease of Use
Average: 8.8
8.7
Integration Breadth
Average: 8.9
9.2
Professional Support
Average: 9.1
Seller Details
Seller
StackOne
Company Website
Year Founded
2023
HQ Location
London, GB
LinkedIn® Page
www.linkedin.com
57 employees on LinkedIn®
  • Overview
    Expand/Collapse Overview
  • Product Description
    How are these determined?Information
    This description is provided by the seller.

    Integrate your product or AI agent with 500+ APIs. With Nango you get API auth, 2-way syncs, LLM tool cals, and unified APIs all on one platform. Extend and customize integrations will full contro

    Users
    • Developer
    Industries
    • Information Technology and Services
    • Computer Software
    Market Segment
    • 44% Small-Business
    • 37% Mid-Market
  • Pros and Cons
    Expand/Collapse Pros and Cons
  • Nango Pros and Cons
    How are these determined?Information
    Pros and Cons are compiled from review feedback and grouped into themes to provide an easy-to-understand summary of user reviews.
    Pros
    Integration Capabilities
    32
    Easy Integrations
    29
    Ease of Use
    21
    Time-saving
    19
    Customer Support
    11
    Cons
    Expensive
    8
    API Limitations
    7
    Poor Documentation
    7
    Integration Issues
    5
    Learning Curve
    5
  • User Satisfaction
    Expand/Collapse User Satisfaction
  • Nango features and usability ratings that predict user satisfaction
    8.5
    Data Processing
    Average: 8.7
    8.7
    Ease of Use
    Average: 8.8
    9.1
    Integration Breadth
    Average: 8.9
    8.6
    Professional Support
    Average: 9.1
  • Seller Details
    Expand/Collapse Seller Details
  • Seller Details
    Seller
    Nango
    Year Founded
    2022
    HQ Location
    San Francisco, California, United States
    Twitter
    @nangohq
    389 Twitter followers
    LinkedIn® Page
    www.linkedin.com
    13 employees on LinkedIn®
Product Description
How are these determined?Information
This description is provided by the seller.

Integrate your product or AI agent with 500+ APIs. With Nango you get API auth, 2-way syncs, LLM tool cals, and unified APIs all on one platform. Extend and customize integrations will full contro

Users
  • Developer
Industries
  • Information Technology and Services
  • Computer Software
Market Segment
  • 44% Small-Business
  • 37% Mid-Market
Nango Pros and Cons
How are these determined?Information
Pros and Cons are compiled from review feedback and grouped into themes to provide an easy-to-understand summary of user reviews.
Pros
Integration Capabilities
32
Easy Integrations
29
Ease of Use
21
Time-saving
19
Customer Support
11
Cons
Expensive
8
API Limitations
7
Poor Documentation
7
Integration Issues
5
Learning Curve
5
Nango features and usability ratings that predict user satisfaction
8.5
Data Processing
Average: 8.7
8.7
Ease of Use
Average: 8.8
9.1
Integration Breadth
Average: 8.9
8.6
Professional Support
Average: 9.1
Seller Details
Seller
Nango
Year Founded
2022
HQ Location
San Francisco, California, United States
Twitter
@nangohq
389 Twitter followers
LinkedIn® Page
www.linkedin.com
13 employees on LinkedIn®
  • Overview
    Expand/Collapse Overview
  • Product Description
    How are these determined?Information
    This description is provided by the seller.

    Refold is an AI powered integration platform and AI native iPaaS that uses autonomous integration agents to build, automate, and maintain enterprise workflows across SAP, Oracle, Workday, NetSuite, Sa

    Users
    • Co-Founder
    Industries
    • Computer Software
    • Information Technology and Services
    Market Segment
    • 54% Small-Business
    • 39% Mid-Market
  • Pros and Cons
    Expand/Collapse Pros and Cons
  • Refold Pros and Cons
    How are these determined?Information
    Pros and Cons are compiled from review feedback and grouped into themes to provide an easy-to-understand summary of user reviews.
    Pros
    Ease of Use
    15
    Integrations
    13
    Integration Capabilities
    7
    Customer Support
    6
    Easy Integrations
    5
    Cons
    Integration Issues
    3
    Learning Curve
    3
    Poor Documentation
    3
    Data Limitations
    2
    Difficult Setup
    2
  • User Satisfaction
    Expand/Collapse User Satisfaction
  • Refold features and usability ratings that predict user satisfaction
    9.8
    Data Processing
    Average: 8.7
    9.6
    Ease of Use
    Average: 8.8
    9.9
    Integration Breadth
    Average: 8.9
    9.9
    Professional Support
    Average: 9.1
  • Seller Details
    Expand/Collapse Seller Details
  • Seller Details
    Seller
    Refold
    Company Website
    Year Founded
    2018
    HQ Location
    San Francisco, CA
    Twitter
    @refoldai
    84 Twitter followers
    LinkedIn® Page
    www.linkedin.com
    44 employees on LinkedIn®
Product Description
How are these determined?Information
This description is provided by the seller.

Refold is an AI powered integration platform and AI native iPaaS that uses autonomous integration agents to build, automate, and maintain enterprise workflows across SAP, Oracle, Workday, NetSuite, Sa

Users
  • Co-Founder
Industries
  • Computer Software
  • Information Technology and Services
Market Segment
  • 54% Small-Business
  • 39% Mid-Market
Refold Pros and Cons
How are these determined?Information
Pros and Cons are compiled from review feedback and grouped into themes to provide an easy-to-understand summary of user reviews.
Pros
Ease of Use
15
Integrations
13
Integration Capabilities
7
Customer Support
6
Easy Integrations
5
Cons
Integration Issues
3
Learning Curve
3
Poor Documentation
3
Data Limitations
2
Difficult Setup
2
Refold features and usability ratings that predict user satisfaction
9.8
Data Processing
Average: 8.7
9.6
Ease of Use
Average: 8.8
9.9
Integration Breadth
Average: 8.9
9.9
Professional Support
Average: 9.1
Seller Details
Seller
Refold
Company Website
Year Founded
2018
HQ Location
San Francisco, CA
Twitter
@refoldai
84 Twitter followers
LinkedIn® Page
www.linkedin.com
44 employees on LinkedIn®
  • Overview
    Expand/Collapse Overview
  • Product Description
    How are these determined?Information
    This description is provided by the seller.

    Knit is a robust integration solution designed to facilitate seamless connections with over 150 applications, including HRIS, CRM, accounting systems, ERPs, and more. The platform enables users to est

    Users
    No information available
    Industries
    • Computer Software
    • Information Technology and Services
    Market Segment
    • 80% Small-Business
    • 21% Mid-Market
  • Pros and Cons
    Expand/Collapse Pros and Cons
  • Knit API Pros and Cons
    How are these determined?Information
    Pros and Cons are compiled from review feedback and grouped into themes to provide an easy-to-understand summary of user reviews.
    Pros
    Ease of Use
    32
    Integrations
    18
    Customer Support
    16
    Problem Solving
    10
    Easy Integrations
    9
    Cons
    Poor Documentation
    9
    Software Bugs
    5
    Error Notification
    4
    Integration Issues
    4
    Limited Apps
    4
  • User Satisfaction
    Expand/Collapse User Satisfaction
  • Knit API features and usability ratings that predict user satisfaction
    9.1
    Data Processing
    Average: 8.7
    9.3
    Ease of Use
    Average: 8.8
    8.6
    Integration Breadth
    Average: 8.9
    9.5
    Professional Support
    Average: 9.1
  • Seller Details
    Expand/Collapse Seller Details
  • Seller Details
    Company Website
    Year Founded
    2023
    HQ Location
    Lewes, US
    Twitter
    @getknitdev
    18 Twitter followers
    LinkedIn® Page
    www.linkedin.com
    36 employees on LinkedIn®
Product Description
How are these determined?Information
This description is provided by the seller.

Knit is a robust integration solution designed to facilitate seamless connections with over 150 applications, including HRIS, CRM, accounting systems, ERPs, and more. The platform enables users to est

Users
No information available
Industries
  • Computer Software
  • Information Technology and Services
Market Segment
  • 80% Small-Business
  • 21% Mid-Market
Knit API Pros and Cons
How are these determined?Information
Pros and Cons are compiled from review feedback and grouped into themes to provide an easy-to-understand summary of user reviews.
Pros
Ease of Use
32
Integrations
18
Customer Support
16
Problem Solving
10
Easy Integrations
9
Cons
Poor Documentation
9
Software Bugs
5
Error Notification
4
Integration Issues
4
Limited Apps
4
Knit API features and usability ratings that predict user satisfaction
9.1
Data Processing
Average: 8.7
9.3
Ease of Use
Average: 8.8
8.6
Integration Breadth
Average: 8.9
9.5
Professional Support
Average: 9.1
Seller Details
Company Website
Year Founded
2023
HQ Location
Lewes, US
Twitter
@getknitdev
18 Twitter followers
LinkedIn® Page
www.linkedin.com
36 employees on LinkedIn®
  • Overview
    Expand/Collapse Overview
  • Product Description
    How are these determined?Information
    This description is provided by the seller.

    The Easy API is a unified API interface designed to simplify the integration of multiple data services into a single, cohesive system. Established in 2010, it offers developers access to a diverse ran

    Users
    • Software Developer
    Industries
    • Computer Software
    • Information Technology and Services
    Market Segment
    • 61% Small-Business
    • 34% Mid-Market
  • User Satisfaction
    Expand/Collapse User Satisfaction
  • The Easy API features and usability ratings that predict user satisfaction
    8.8
    Data Processing
    Average: 8.7
    9.0
    Ease of Use
    Average: 8.8
    8.9
    Integration Breadth
    Average: 8.9
    8.6
    Professional Support
    Average: 9.1
  • Seller Details
    Expand/Collapse Seller Details
  • Seller Details
    HQ Location
    N/A
    LinkedIn® Page
    www.linkedin.com
    1 employees on LinkedIn®
Product Description
How are these determined?Information
This description is provided by the seller.

The Easy API is a unified API interface designed to simplify the integration of multiple data services into a single, cohesive system. Established in 2010, it offers developers access to a diverse ran

Users
  • Software Developer
Industries
  • Computer Software
  • Information Technology and Services
Market Segment
  • 61% Small-Business
  • 34% Mid-Market
The Easy API features and usability ratings that predict user satisfaction
8.8
Data Processing
Average: 8.7
9.0
Ease of Use
Average: 8.8
8.9
Integration Breadth
Average: 8.9
8.6
Professional Support
Average: 9.1
Seller Details
HQ Location
N/A
LinkedIn® Page
www.linkedin.com
1 employees on LinkedIn®