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Top 703 Internal Communications Software SaaS Companies in May 2026

As of May 2026, there are 703 SaaS companies in Internal Communications Software. They have combined revenues of $8.9B and employ 48.4K people. They have raised $3.7B and serve 67.2M customers combined.

Internal communications software enables organizations to streamline communication across various teams and departments. It consists of platforms and tools designed to share information, engage employees, and enhance collaboration in real-time. Typical features include instant messaging, video conferencing, file sharing, and employee feedback mechanisms, which collectively facilitate a cohesive work environment. The primary use cases for internal communications software involve improving team engagement, aligning goals, and disseminating crucial information. These software solutions often cater to a diverse range of buyer personas, including human resources personnel tasked with employee engagement, IT departments needing secure communication channels, and management teams focused on enhancing team productivity and culture.

Companies
703
Revenue
$8.9B
Funding
$3.7B
Employees
48.4K

Filters

Sorting: Highest -> Lowest

Filters

Top Internal Communications Software Companies

Showing 10 of 89 companies ranked by annual revenue.

1
Firstup

San Francisco, California, United States

world’s first intelligent communication platform

Revenue
$100M
Customers
1K
Year founded
2010
Funding
$114.8M
Team size
373
Growth
-
2
Willdix

Tallinn, Estonia

The First Sales-Oriented Unified Communications Solution Your communications system can either boost your revenue or create bottlenecks that slow your business down. Turn it into the core of your operations and grow your business, all while saving time and maintaining total security. All in complete comfort, right from your browser. HOW CAN SMALL AND MEDIUM BUSINESSES INCREASE THEIR PRODUCTIVITY? It doesn’t take hours and hours of overtime. By choosing the right UC&C system, companies can improve communications and significantly increase productivity. Since 2005, Wildix has been helping companies grow their businesses through UC&C, by creating the first web-based VoIP PBX UC&C system. The first 100% secure, easy-to-use, professional web-based UC&C system. Wildix is for companies that want to increase their productivity with a secure-by-design tool. 👉 more business: +52% increase in web sales 👉 better efficiency: 25% time saved on everyday operations 👉 100% security Wildix brings value to companies around the world, with offices in Europe and the United States. The Center for Research and Development in Odessa, Ukraine has been in operation since 2007, deploying and supporting products. Only Wildix helps companies grow with 100% secure products that put the latest technology at their service. #Wildix #unifiedcommunications

Revenue
$100M
Customers
-
Year founded
2005
Funding
-
Team size
319
Growth
-
3
37signals LLC

United States

Email sucked for years. Not anymore — we fixed it. HEY’s fresh approach transforms email into something you want to use, not something you’re forced to deal with.

Revenue
$80.8M
Customers
-
Year founded
-
Funding
-
Team size
-
Growth
-
4
Advantage Club AI

San Francisco, California, United States

Advantage Club is a global HR-Tech player providing Corporate Employee Experience and R&R Platform for enhancing employee productivity and employee engagement. It delivers an AI-driven platform for driving employee engagement with features like rewards, recognition, and community building.

Revenue
$76.4M
Customers
-
Year founded
2016
Funding
-
Team size
285
Growth
-
5
HoneyBook

San Francisco, California, United States

business management platform for creative entrepreneurs

Revenue
$74.2M
Customers
55K
Year founded
2013
Funding
$498M
Team size
349
Growth
18.57%
6
Responsive

Beaverton, Oregon, United States

The global leader in strategic response management software, transforming how organizations share and exchange critical information

Revenue
$67.1M
Customers
-
Year founded
2015
Funding
-
Team size
610
Growth
-
7
QTrade

Shenzhen, Guangdong, China

Developer of instant messaging tools designed to provide professional community and trading platform for Finance industry. The company's platform provide financial practitioners with various solutions such as transaction communication, AI information processing, and institutional risk control compliance management.

Revenue
$65M
Customers
-
Year founded
2016
Funding
-
Team size
8
Growth
-
8
LumApps

Paris, Ile-de-france, France

Digital workplace communication platform.

Revenue
$63M
Customers
30M
Year founded
2012
Funding
$102M
Team size
345
Growth
-
9
Guru

Philadelphia, Pennsylvania, United States

knowledge management platform

Revenue
$63M
Customers
-
Year founded
2013
Funding
$70.7M
Team size
2.4K
Growth
-
10
Happyco

San Francisco, California, United States

employee happiness and engagement solutions

Revenue
$57.8M
Customers
1.5K
Year founded
2011
Funding
$74.5M
Team size
240
Growth
67.81%

Inclusion Criteria

- Provides tools for real-time messaging and collaboration - Allows for document sharing and management among team members - Includes features for tracking employee engagement and feedback - Facilitates integration with other workplace tools and software - Not just focused on external communication; must address internal communication needs