- Revenue
- $100M
- Customers
- 8K
- Year founded
- 2013
- Funding
- $202.1M
- Team size
- 518
- Growth
- 49.25%
Top 31 Email Client Software SaaS Companies in May 2026
As of May 2026, there are 31 SaaS companies in Email Client Software. They have combined revenues of $1.1B and employ 5.2K people. They have raised $314.1M and serve 153K customers combined.
Email client software enables users to access, manage, and send emails effectively. This software can function as a standalone application installed on a desktop or mobile device, or as a web-based service, offering flexibility based on user preferences. Common use cases include personal communication, business correspondence, and team collaboration, where users need organized access to multiple email accounts in one place. Typical features of email client software include the ability to send and receive emails, manage contacts, schedule calendar events, and organize messages through folders or tags. Additional functionalities may encompass spam filtering, email encryption, and integration with other productivity tools. The primary users of such software range from individual consumers to business professionals in roles such as administration, sales, marketing, and IT who require robust email management and communication capabilities.
Filters
Sorting: Highest -> Lowest
Top Email Client Software Companies
Showing 10 of 7 companies ranked by annual revenue.
2
Saas Labs
Palo Alto, California, United States
B2B SAAS company for business management and operations
- Revenue
- $42.7M
- Customers
- 6K
- Year founded
- 2016
- Funding
- $73.2M
- Team size
- 374
- Growth
- 95.13%
3
Readdle
Berlin, Berlin, Germany
Readdle creates innovative business and productivity applications that shape the Future of work. People can get things done faster and much more efficiently while using Readdle apps such as Spark, Documents, Scanner Pro, PDF Expert, Calendars, Printer Pro, etc. Founded back in 2007, Readdle aims to bring best-in-class apps with comprehensive UI and powerful features. More than 200,000,000 downloads and millions of users worldwide are happily using Readdle apps on a daily basis. Innovative technologies, great user experience, and attention to detail made Readdle one of the most significant players in the App Store. Awards, mentions and reviews by: Forbes, BusinessInsider, Wired, MacWorld, Tech Crunch, Cnet, Gizmodo, USA Today, TheNextWeb, TUAW, BBC, The Verge, O'Reilly, etc.
- Revenue
- $36.1M
- Customers
- -
- Year founded
- 2007
- Funding
- -
- Team size
- 328
- Growth
- -
4
eSense
Riyadh, Saudi Arabia
eSense is a leading regional software and cloud technologies company recognized for its innovative solutions and continued pursuit to provide exceptional services to its clients. Established in 2002 as a software development company, eSense rapidly evolved into developing stellar enterprise solutions and assisting organizations to transform their IT, line of business apps, platforms, and solutions to modern, cloud-powered solutions. Today, eSense is headquartered in Saudi Arabia with over 200 employees serving a wide array of public enterprises, educational and private entities. Check out our Social Media Profiles for news: Twitter @eSenseSoftware Facebook @eSenseSoftware
- Revenue
- $25.7M
- Customers
- -
- Year founded
- 2002
- Funding
- -
- Team size
- 234
- Growth
- -
5
Scand
Warszawa, Masovian, Poland
Scand is a custom software development company located in Warsaw, Poland. 25+ years in IT, more than 700 successful projects for hundreds of customers globally and over 250 highly experienced engineers are our main assets. Among our clients are: NASA, IBM, Cisco, FedEx, Bank of America, Dresdner Bank, Reuters, Yahoo!, Siemens, Merrill Lynch, and many other Fortune 500 companies. The company is primarily focusing on software application and product development using .NET, Java, PHP, C/C++ and other technologies. Our Core Services are: • Web Application Development • Desktop Application Development • Mobile Application Development • Cloud App Development • Embedded Development Since 2000 we've been developing customized solutions for various IT companies, e-commerce businesses, logistics enterprises, education institutions and healthcare organizations. As well as we provide tailored software development for IoT, augmented and virtual reality. For more details, please, contact at: [email protected].
- Revenue
- $23M
- Customers
- -
- Year founded
- 2000
- Funding
- -
- Team size
- 209
- Growth
- -
6
Synacor
Buffalo, New York, United States
Synacor is a cloud-based software and services company headquartered in Buffalo, New York with offices across the globe. We're known for serving global video, content, entertainment, internet and communications providers, device manufacturers, governments and enterprises. Our mission is to enable our customers to better engage with their consumers and partners. Our customers use Synacor’s technology platforms and services to scale their businesses and extend their subscriber relationships. We deliver email and collaboration platforms, and cloud-based identity management. Optimize your login experience with identity management tools & services utilizing Cloud ID: Scalable identity for TVE and Streaming media: www.cloudid.io Rethink Collaboration with Zimbra Productivity Suite: Zimbra creates a collaborative, secure, and seamless environment to improve team engagement for better productivity with email and collaborations tools: www.zimbra.com
- Revenue
- $20.8M
- Customers
- -
- Year founded
- 1998
- Funding
- -
- Team size
- 189
- Growth
- -
7
Trengo
Utrecht, Netherlands
Developer of an online social application designed for improving communication channel in an enterprise. The company's application streamlines emails, social media and whatsapp messages, calls and collaborate in team inbox, providing enterprises an innovative solution to communicate with their clients via all communication and media channels through one shared inbox.
- Revenue
- $17.9M
- Customers
- 8K
- Year founded
- 2015
- Funding
- $38.1M
- Team size
- 109
- Growth
- 33.56%
Inclusion Criteria
- Must allow users to send and receive emails from one or multiple accounts - Should provide organization features such as folders, tags, or categories for managing emails - Must support integrations with calendar and contact management tools - Needs to offer enhanced security features, such as encryption and spam filtering - Not just for sending and receiving emails; must also provide tools for email management and organization - Should include a user-friendly interface for ease of use across different devices.