# Top Free Email Client Software - Page 2 ## How Many Email Client Software Products Does G2 Track? **Total Products under this Category:** 52 ### Category Stats (Jul 2026) - **Average Rating:** 4.3/5 The average rating of products in this category, based on all submitted ratings - **Top Trending Product:** Shift (+0.07%) - Among all products in this category, Shift recorded the largest rating increase compared to last month _Last updated: July 28, 2026_ ## How Does G2 Rank Email Client Software Products? **Why You Can Trust G2's Software Rankings:** - 30 Analysts and Data Experts - 72,900+ Authentic Reviews - 52+ 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. ## G2 Grid® for Email Client Software ![G2 Grid® for Email Client Software plotting products by satisfaction and market presence](https://www.g2.com/categories/email-client/grids.png?focus%5B%5D=662&focus%5B%5D=663&focus%5B%5D=7372&focus%5B%5D=84997&focus%5B%5D=20351&focus%5B%5D=10739&focus%5B%5D=1720&focus%5B%5D=49500) Highlighted products: Microsoft Outlook, Microsoft 365, Zoom Workplace, Superhuman Mail, Missive, Front, Thunderbird, and Shift. Underlying data: [Grid® JSON](https://www.g2.com/categories/email-client/grids.json?focus%5B%5D=microsoft-outlook&focus%5B%5D=microsoft365&focus%5B%5D=zoom-workplace&focus%5B%5D=superhuman-mail&focus%5B%5D=missive&focus%5B%5D=front&focus%5B%5D=thunderbird&focus%5B%5D=redbrick-shift) **Sponsored** ### Apollo.io Apollo.io is an AI-powered go-to-market (GTM) platform that helps revenue teams find, engage, and manage B2B buyers across the entire sales cycle. Apollo.io is the company behind the industry’s first fully agentic GTM platform, transforming how revenue teams execute. Going beyond automation, Apollo’s intelligent agents actively drive results across the entire sales funnel – from prospecting to deal management – all in one place. Trusted by millions of users and hundreds of thousands of companies – including Anthropic, Autodesk, and Docusign – Apollo is making world-class go-to-market simple, intelligent, and accessible for all. Apollo serves sales development representatives, account executives, sales leaders, revenue operations, and marketing teams at B2B organizations of various sizes. Teams use Apollo to build and maintain target account lists, orchestrate outbound and inbound motions, manage opportunities, and understand which activities lead to qualified pipeline and closed revenue. Key capabilities include: Data and targeting: Access to a large B2B database with company and contact details, including firmographic, technographic, and buyer signal data, so users can define ideal customer profiles and create precise segments for outreach. Prospecting and enrichment: Tools to search, filter, and save prospect lists, plus enrichment workflows that keep contact and account records up to date in Apollo and connected systems such as CRM. Sales engagement: Multi-step, multi-channel sequences for email, calls, and tasks that standardize how reps follow up with prospects, with controls for timing, throttling, and deliverability. Agentic and AI-assisted workflows: Intelligent agents and AI features that help with account research, lead scoring, message generation, and next-step recommendations so reps can prioritize and personalize at scale. Deal and activity management: Basic CRM-style functionality for tracking opportunities, stages, activities, and notes, giving teams a single view of pipeline health and sales performance. By combining data, engagement, and deal execution in one platform, Apollo is designed to reduce the number of disconnected tools in a typical GTM stack and provide a consistent workflow for building pipeline and managing deals. This helps organizations improve data quality, increase seller productivity, and run more structured, measurable go-to-market programs. [Visit website](https://www.g2.com/external_clickthroughs/record?secure%5Bad_program%5D=ppc&secure%5Bad_slot%5D=category_product_list&secure%5Bcategory_id%5D=1965&secure%5Bchosen_at%5D=2026-07-28T19%3A05%3A12Z&secure%5Bdisplayable_resource_id%5D=147&secure%5Bdisplayable_resource_type%5D=Category&secure%5Bmedium%5D=sponsored&secure%5Bplacement_reason%5D=neighbor_category&secure%5Bplacement_resource_ids%5D%5B%5D=147&secure%5Bprioritized%5D=false&secure%5Bproduct_id%5D=19743&secure%5Bresource_id%5D=1965&secure%5Bresource_type%5D=Category&secure%5Bsource_type%5D=category_page&secure%5Bsource_url%5D=https%3A%2F%2Fwww.g2.com%2Fcategories%2Femail-client%2Ffree%3Fcategory_id%3Demail-client%26page%3D2&secure%5Btoken%5D=3facde1e09e1c223a672ffaa8822c96161a7a26c3c5ceb79bf085be56f0d8ffc&secure%5Burl%5D=https%3A%2F%2Fwww.apollo.io%2Fdemo%3Futm_source%3Dg2%26utm_medium%3Dcpc%26utm_campaign%3DG2Clicks%26utm_content%3Dtopic%26utm_term%3Dcalendar&secure%5Burl_type%5D=custom_url) [ Mailbird ](https://www.g2.com/products/mailbird/reviews) By [Mailbird](https://www.g2.com/sellers/mailbird) [ 3.6/5(101) ](https://www.g2.com/products/mailbird/reviews) What do users say? Users consistently praise Mailbird for its clean interface and fast performance, which enhance their email management experience. The ability to integrate multiple accounts and applications in one pla Pros and Cons [ Ease of Use (4) ](https://www.g2.com/products/mailbird/reviews?qs=pros-and-cons)[ Bug Issues (3) ](https://www.g2.com/products/mailbird/reviews?qs=pros-and-cons) [ Unipile ](https://www.g2.com/products/unipile/reviews) By [Unipile](https://www.g2.com/sellers/unipile) [ 4.3/5(15) ](https://www.g2.com/products/unipile/reviews) What do users say? Users consistently praise the ease of use and task organization features of Unipile, highlighting how it simplifies communication across multiple platforms. Many appreciate its ability to centralize m Pros and Cons [ Customer Support (1) ](https://www.g2.com/products/unipile/reviews?qs=pros-and-cons)[ Connectivity Issues (1) ](https://www.g2.com/products/unipile/reviews?qs=pros-and-cons) [ EssentialPIM ](https://www.g2.com/products/essentialpim/reviews) By [Astonsoft](https://www.g2.com/sellers/astonsoft) [ 4.8/5(5) ](https://www.g2.com/products/essentialpim/reviews) Product Description EssentialPIM is the award-winning personal information manager. It handles all your appointments, contacts, tasks, notes, password entries and email messages with easy-to-use, intuitive tools. In addi [ 500mail by 500apps ](https://www.g2.com/products/500mail-by-500apps/reviews) By [500apps](https://www.g2.com/sellers/500apps) [ 5/5(3) ](https://www.g2.com/products/500mail-by-500apps/reviews) Product Description 500Mail by 500apps is an email software that lets you keep emails safe, encrypted and ad-free feature.  Get unlimited mailboxes and set up multiple domains with IMAP and POP email authentication proto [ Synology Office Suite ](https://www.g2.com/products/synology-office-suite/reviews) By [Synology](https://www.g2.com/sellers/synology) [ 4.4/5(22) ](https://www.g2.com/products/synology-office-suite/reviews) What do users say? Users consistently praise the real-time collaboration features of Synology Office Suite, highlighting its ability to enhance teamwork and productivity. The seamless integration with Synology NAS provi Pros and Cons [ Ease of Use (11) ](https://www.g2.com/products/synology-office-suite/reviews?qs=pros-and-cons)[ Limited Features (6) ](https://www.g2.com/products/synology-office-suite/reviews?qs=pros-and-cons) [ Afterlogic Webmail ](https://www.g2.com/products/afterlogic-webmail/reviews) By [AfterLogic](https://www.g2.com/sellers/afterlogic) [ 4.1/5(10) ](https://www.g2.com/products/afterlogic-webmail/reviews) What do users say? Users consistently praise the fast and easy-to-use interface of Afterlogic Webmail, highlighting its ability to synchronize emails across multiple platforms and integrate with social media accounts. T [ Shared Inbox by Canary ](https://www.g2.com/products/shared-inbox-by-canary/reviews) By [Canary Mail](https://www.g2.com/sellers/canary-mail) [ 4.8/5(4) ](https://www.g2.com/products/shared-inbox-by-canary/reviews) Product Description Shared Inbox by Canary is a powerful, AI-powered communication hub designed for customer-facing teams. It brings together email, chatbot, and task management—so your support, sales, and operations tea Pros and Cons [ Ease of Use (14) ](https://www.g2.com/products/shared-inbox-by-canary/reviews?qs=pros-and-cons)[ Missing Features (5) ](https://www.g2.com/products/shared-inbox-by-canary/reviews?qs=pros-and-cons) [ Clyton ](https://www.g2.com/products/clyton/reviews) By [Gammadyne](https://www.g2.com/sellers/gammadyne) [ 4.5/5(1) ](https://www.g2.com/products/clyton/reviews) Product Description Clyton is an email client with advanced security and spam filtering features. Pros and Cons [ Security (1) ](https://www.g2.com/products/clyton/reviews?qs=pros-and-cons)[ Missing Features (1) ](https://www.g2.com/products/clyton/reviews?qs=pros-and-cons) [ EmailEngine ](https://www.g2.com/products/emailengine/reviews) By [Postal Systems OÜ](https://www.g2.com/sellers/postal-systems-ou) [ 0/5(0) ](https://www.g2.com/products/emailengine/reviews) Product Description EmailEngine is a self-hosted email automation platform. It provides access to email accounts via an easy-to-use HTTP REST API to receive and send emails. EmailEngine also actively monitors these accou - [‹ Prev‹ Prev](/categories/email-client/free?category_id=email-client&order=g2_score#product-list) - [1](/categories/email-client/free?category_id=email-client&order=g2_score#product-list) - 2 - Next ›Next › Spotlight Categories [Environmental Health and Safety Software](https://www.g2.com/categories/environmental-health-and-safety) [HCM Software](https://www.g2.com/categories/hcm-software) [Security Awareness Training Software](https://www.g2.com/categories/security-awareness-training) [Event Management Platforms](https://www.g2.com/categories/event-management-platforms) [Digital Adoption Platforms](https://www.g2.com/categories/digital-adoption-platform) Similar Categories - [Team Collaboration](/categories/team-collaboration) - [Other Collaboration](/categories/other-collaboration) - [Agentic AI Browser](/categories/agentic-ai-browser) - [AI Meeting Assistants](/categories/ai-meeting-assistants) - [AI Presentation Tools](/categories/ai-presentation-tools) - [Audio Conferencing](/categories/audio-conferencing) - [Board Management](/categories/board-management) - [Bookmark Manager](/categories/bookmark-manager) - [Browser](/categories/browsers) - [Business Scheduling](/categories/business-scheduling) - [Calendar](/categories/calendar-software) - [Cloud PBX Platforms](/categories/cloud-pbx-platforms) - [Collaborative Research Writing Tools](/categories/collaborative-research-writing-tools) - [Decision-Making](/categories/decision-making) - [Digital Adoption Platform](/categories/digital-adoption-platform) [Browse Email Client Themes](/categories/email-client/themes)