Company lists · Data refreshed November 2026
Top 25 Internal messaging platforms based in the United States
RevenueBase identified 213 company matches for internal messaging platforms associated with the United States as of November 2026 and tracks 6,228 professional contacts across them, including 884 with verified work emails. San Francisco is the largest hub.
This list covers company matches for internal messaging platforms associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 5, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest internal messaging platforms based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 2,639 contacts → | ||||
Exact match “Slack is on a mission to make people's working lives simpler, more pleasant and more productive.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 2 | 919 contacts → | ||||
Exact match “Café helps enterprises drive collaboration, engagement, and cohesion through real-world interactions.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 3 | 509 contacts → | ||||
Exact match “Workshop is a modern, purpose-built internal communications platform that helps teams create, send, manage, and measure employee communications in one place, starting with email…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 4 | 484 contacts → | ||||
Exact match “Connect your people, places, and spaces.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 5 | 255 contacts → | ||||
Exact match “The Firstup Intelligent Communication Platform equips organizations to improve productivity, retention, labor efficiency, safety compliance, and revenue performance by activating…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 6 | 77 contacts → | ||||
Exact match “Business Class Team Texting to help Sales and Service Teams!” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 7 | 77 contacts → | ||||
Exact match “Mio is a secure middleware that unlocks cross-platform messaging, file sharing, and meeting initiation for enterprise organizations that use Google Workspace and Microsoft 365…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 8 | 63 contacts → | ||||
Exact match “Swit is every team's work hub that consolidates collaboration essentials in one place - task, chat, goals, approvals, and integrations.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 9 | 55 contacts → | ||||
Exact match “Zenzap gives you AI agents that automate work across your tools and teams, all in one intuitive chat interface.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 10 | 36 contacts → | ||||
Exact match “Agility is the greatest advantage in the modern marketplace.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 11 | 34 contacts → | ||||
Exact match “Hey there!” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 12 | 33 contacts → | ||||
Exact match “Crafted for speed and focus, Macro brings together team chat, code, docs, tasks, email, and agents in one interface.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 13 | 30 contacts → | ||||
Exact match “Pronto is a workplace communication app built for teams that aren't sitting at a desk.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 14 | 28 contacts → | ||||
Exact match “Cerkl Broadcast is the premier, forward-thinking employee communications suite.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 15 | 28 contacts → | ||||
Exact match “At 360 SMS, we transform and simplify communication for Salesforce users with our native messaging solution, enhancing connectivity through automated, streamlined, and omnichannel…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 16 | 20 contacts → | ||||
Exact match “Voxer is a high-performance messaging app that combines the power of live voice with text, photos and videos.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 17 | 19 contacts → | ||||
Exact match “Avochato is an AI messaging platform built to help businesses have better conversations with their customers.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 18 | 18 contacts → | ||||
Exact match “We believe it should be easy to share the right information with the right people, both inside and outside of your team.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 19 | 17 contacts → | ||||
Exact match “Zulip is an open-source team chat application designed for seamless remote and hybrid work.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 20 | 16 contacts → | ||||
Exact match “Communicate with your employees in the simplest way possible.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 21 | 16 contacts → | ||||
Exact match “Zelo redefines how companies communicate internally.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 22 | 15 contacts → | ||||
Exact match “AI Digital Workplace for Secure Cross-Enterprise Collaboration Work doesn't stop at your organization's boundaries.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 23 | 14 contacts → | ||||
Exact match “Orchestra is a chat-centric workspace with built-in work tools.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 24 | 13 contacts → | ||||
Exact match “Optevo® is building the platform for The New Style of Work® where teams think, develop ideas, collaborate, and execute in one intelligent environment.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 25 | 11 contacts → | ||||
Exact match “Everleagues provides the technology to bring organizations, clients, applications and data all in one secure location.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “internal messaging platforms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 25 of 213 internal messaging platforms based in the United States
See the full list, filter by size, metro and specialty, and access 884 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Internal messaging platforms based in the United States at a glance
As of Nov 5, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 213 companies.
How this list was built
The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Company records associated with the United States whose business descriptions match “internal messaging platforms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
- RevenueBase SmartSearch
- Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
- Public preview
- The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
- Match quality
- RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every displayed company carries at least one verified work email. RevenueBase tracks 884 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on November 5, 2026. Lists refresh periodically as the graph is re-checked.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
Internal messaging platforms by metro
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “internal messaging platforms”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many internal messaging platforms are there based in the United States?
RevenueBase identified 213 company matches for internal messaging platforms associated with the United States as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.
What is the largest company on this list?
SLACK tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most internal messaging platforms?
San Francisco leads with 32 company records, followed by New York (16) and Wilmington (7).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 884 professional contacts with verified work emails tracked across these 213 companies; direct dials are available where recorded.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 5, 2026.
Ready to reach these companies? Verified emails and direct dials for all 213 internal messaging platforms based in the United States. Start with a free account, no credit card.
Download this list →Related lists
Internal messaging platforms by geography
About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Internal messaging platforms based in the United Kingdom
- Internal messaging platforms based in Brazil
- Internal messaging platforms based in San Francisco, United States
- Internal messaging platforms based in Germany
- Internal messaging platforms based in India
- AI companies based in the United States
Company intelligence · public preview
Top 25 internal messaging platforms based in the United States
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 213 matching company records for internal messaging platforms based in the United States, with 6,228 tracked contacts and 884 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: November 5, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 internal messaging platforms based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  SLACKslack.comHQ: San Francisco, CA, United StatesReported employees: 1,001-5,000 | San Francisco, CA, United States | 1,001-5,000 | Exact match | 2,639 contacts → |
“Slack is on a mission to make people's working lives simpler, more pleasant and more productive.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Café YC S21at.cafeHQ: NY, United StatesReported employees: Not recorded | NY, United States | Not recorded | Exact match | 919 contacts → |
“Café helps enterprises drive collaboration, engagement, and cohesion through real-world interactions.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Workshopuseworkshop.comHQ: Omaha, NE, United StatesReported employees: 51-200 | Omaha, NE, United States | 51-200 | Exact match | 509 contacts → |
“Workshop is a modern, purpose-built internal communications platform that helps teams create, send, manage, and measure employee communications in one place, starting with email…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Appspaceappspace.comHQ: Tampa, FL, United StatesReported employees: 201-500 | Tampa, FL, United States | 201-500 | Exact match | 484 contacts → |
“Connect your people, places, and spaces.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Firstupfirstup.ioHQ: San Francisco, CA, United StatesReported employees: 201-500 | San Francisco, CA, United States | 201-500 | Exact match | 255 contacts → |
“The Firstup Intelligent Communication Platform equips organizations to improve productivity, retention, labor efficiency, safety compliance, and revenue performance by activating…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Beetextingagent.beetexting.comHQ: Bloomington, IL, United StatesReported employees: 11-50 | Bloomington, IL, United States | 11-50 | Exact match | 77 contacts → |
“Business Class Team Texting to help Sales and Service Teams!” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  MIOm.ioHQ: Austin, TX, United StatesReported employees: 11-50 | Austin, TX, United States | 11-50 | Exact match | 77 contacts → |
“Mio is a secure middleware that unlocks cross-platform messaging, file sharing, and meeting initiation for enterprise organizations that use Google Workspace and Microsoft 365…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  SWITswit.ioHQ: San Francisco, CA, United StatesReported employees: 51-200 | San Francisco, CA, United States | 51-200 | Exact match | 63 contacts → |
“Swit is every team's work hub that consolidates collaboration essentials in one place - task, chat, goals, approvals, and integrations.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Zenzapzenzap.coHQ: New York, NY, United StatesReported employees: 51-200 | New York, NY, United States | 51-200 | Exact match | 55 contacts → |
“Zenzap gives you AI agents that automate work across your tools and teams, all in one intuitive chat interface.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Socialchorussocialchorus.comHQ: San Francisco, CA, United StatesReported employees: 51-200 | San Francisco, CA, United States | 51-200 | Exact match | 36 contacts → |
“Agility is the greatest advantage in the modern marketplace.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Heymarketheymarket.comHQ: San Francisco, CA, United StatesReported employees: 11-50 | San Francisco, CA, United States | 11-50 | Exact match | 34 contacts → |
“Hey there!” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  MACROmacro.comHQ: New York, United StatesReported employees: 11-50 | New York, United States | 11-50 | Exact match | 33 contacts → |
“Crafted for speed and focus, Macro brings together team chat, code, docs, tasks, email, and agents in one interface.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Prontopronto.ioHQ: Lehi, UT, United StatesReported employees: 11-50 | Lehi, UT, United States | 11-50 | Exact match | 30 contacts → |
“Pronto is a workplace communication app built for teams that aren't sitting at a desk.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  CERKLcerkl.comHQ: Blue Ash, OH, United StatesReported employees: 51-200 | Blue Ash, OH, United States | 51-200 | Exact match | 28 contacts → |
“Cerkl Broadcast is the premier, forward-thinking employee communications suite.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  360 SMS APP360smsapp.comHQ: Laguna Beach, CA, United StatesReported employees: 501-1,000 | Laguna Beach, CA, United States | 501-1,000 | Exact match | 28 contacts → |
“At 360 SMS, we transform and simplify communication for Salesforce users with our native messaging solution, enhancing connectivity through automated, streamlined, and omnichannel…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  VOXERvoxer.comHQ: San Francisco, CA, United StatesReported employees: 11-50 | San Francisco, CA, United States | 11-50 | Exact match | 20 contacts → |
“Voxer is a high-performance messaging app that combines the power of live voice with text, photos and videos.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Avochatoavochato.comHQ: Mill Valley, CA, United StatesReported employees: 11-50 | Mill Valley, CA, United States | 11-50 | Exact match | 19 contacts → |
“Avochato is an AI messaging platform built to help businesses have better conversations with their customers.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  GLUEglue.aiHQ: San Francisco, CA, United StatesReported employees: 1-10 | San Francisco, CA, United States | 1-10 | Exact match | 18 contacts → |
“We believe it should be easy to share the right information with the right people, both inside and outside of your team.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Kandra Labs, Inc. Creators Of Zulipzulip.comHQ: San Francisco, CA, United StatesReported employees: 11-50 | San Francisco, CA, United States | 11-50 | Exact match | 17 contacts → |
“Zulip is an open-source team chat application designed for seamless remote and hybrid work.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  TRUHUtruhu.comHQ: Pleasanton, CA, United StatesReported employees: 11-50 | Pleasanton, CA, United States | 11-50 | Exact match | 16 contacts → |
“Communicate with your employees in the simplest way possible.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  ZELOzeloapp.comHQ: San Francisco, CA, United StatesReported employees: 1-10 | San Francisco, CA, United States | 1-10 | Exact match | 16 contacts → |
“Zelo redefines how companies communicate internally.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Melpapp, INCmelp.usHQ: New York, NY, United StatesReported employees: 11-50 | New York, NY, United States | 11-50 | Exact match | 15 contacts → |
“AI Digital Workplace for Secure Cross-Enterprise Collaboration Work doesn't stop at your organization's boundaries.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Orchestraorch.soHQ: San Francisco, United StatesReported employees: 1-10 | San Francisco, United States | 1-10 | Exact match | 14 contacts → |
“Orchestra is a chat-centric workspace with built-in work tools.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Optevooptevo.comHQ: Denver, CO, United StatesReported employees: 11-50 | Denver, CO, United States | 11-50 | Exact match | 13 contacts → |
“Optevo® is building the platform for The New Style of Work® where teams think, develop ideas, collaborate, and execute in one intelligent environment.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Everleagueseverleagues.comHQ: New York, NY, United StatesReported employees: 1-10 | New York, NY, United States | 1-10 | Exact match | 11 contacts → |
“Everleagues provides the technology to bring organizations, clients, applications and data all in one secure location.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 213 company matches
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Internal messaging platforms: dataset insights
November 5, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
212 records in the displayed employee bands.
1 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 213 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: November 5, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Internal messaging platforms by metro
Questions about this company list
What does Exact match mean for internal messaging platforms?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many internal messaging platforms did RevenueBase find based in the United States?
The saved snapshot records 213 matching company records, 6,228 tracked contacts and 884 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: November 5, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Internal messaging platforms by geography
Cite this list
RevenueBase Data Team. Top 25 internal messaging platforms based in the United States. Snapshot: November 5, 2026. https://revenuebase.ai/companies/internal-messaging-platforms/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Internal messaging platforms based in the United Kingdom
- Internal messaging platforms based in Brazil
- Internal messaging platforms based in San Francisco, United States
- Internal messaging platforms based in Germany
- Internal messaging platforms based in India
- AI companies based in the United States
Company intelligence · public preview
Top 25 internal messaging platforms based in the United States
RevenueBase records 213 matching company records for internal messaging platforms based in the United States, with 6,228 tracked contacts and 884 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: November 5, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 internal messaging platforms based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | SLACKslack.com HQ: San Francisco, CA, United StatesReported employees: 1,001-5,000 | San Francisco, CA, United States | 1,001-5,000 | Exact match | 2,639 contacts → |
“Slack is on a mission to make people's working lives simpler, more pleasant and more productive.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Café YC S21at.cafe HQ: NY, United StatesReported employees: Not recorded | NY, United States | Not recorded | Exact match | 919 contacts → |
“Café helps enterprises drive collaboration, engagement, and cohesion through real-world interactions.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Workshopuseworkshop.com HQ: Omaha, NE, United StatesReported employees: 51-200 | Omaha, NE, United States | 51-200 | Exact match | 509 contacts → |
“Workshop is a modern, purpose-built internal communications platform that helps teams create, send, manage, and measure employee communications in one place, starting with email…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Appspaceappspace.com HQ: Tampa, FL, United StatesReported employees: 201-500 | Tampa, FL, United States | 201-500 | Exact match | 484 contacts → |
“Connect your people, places, and spaces.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Firstupfirstup.io HQ: San Francisco, CA, United StatesReported employees: 201-500 | San Francisco, CA, United States | 201-500 | Exact match | 255 contacts → |
“The Firstup Intelligent Communication Platform equips organizations to improve productivity, retention, labor efficiency, safety compliance, and revenue performance by activating…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Beetextingagent.beetexting.com HQ: Bloomington, IL, United StatesReported employees: 11-50 | Bloomington, IL, United States | 11-50 | Exact match | 77 contacts → |
“Business Class Team Texting to help Sales and Service Teams!” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | MIOm.io HQ: Austin, TX, United StatesReported employees: 11-50 | Austin, TX, United States | 11-50 | Exact match | 77 contacts → |
“Mio is a secure middleware that unlocks cross-platform messaging, file sharing, and meeting initiation for enterprise organizations that use Google Workspace and Microsoft 365…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | SWITswit.io HQ: San Francisco, CA, United StatesReported employees: 51-200 | San Francisco, CA, United States | 51-200 | Exact match | 63 contacts → |
“Swit is every team's work hub that consolidates collaboration essentials in one place - task, chat, goals, approvals, and integrations.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Zenzapzenzap.co HQ: New York, NY, United StatesReported employees: 51-200 | New York, NY, United States | 51-200 | Exact match | 55 contacts → |
“Zenzap gives you AI agents that automate work across your tools and teams, all in one intuitive chat interface.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Socialchorussocialchorus.com HQ: San Francisco, CA, United StatesReported employees: 51-200 | San Francisco, CA, United States | 51-200 | Exact match | 36 contacts → |
“Agility is the greatest advantage in the modern marketplace.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Heymarketheymarket.com HQ: San Francisco, CA, United StatesReported employees: 11-50 | San Francisco, CA, United States | 11-50 | Exact match | 34 contacts → |
“Hey there!” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | MACROmacro.com HQ: New York, United StatesReported employees: 11-50 | New York, United States | 11-50 | Exact match | 33 contacts → |
“Crafted for speed and focus, Macro brings together team chat, code, docs, tasks, email, and agents in one interface.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Prontopronto.io HQ: Lehi, UT, United StatesReported employees: 11-50 | Lehi, UT, United States | 11-50 | Exact match | 30 contacts → |
“Pronto is a workplace communication app built for teams that aren't sitting at a desk.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | CERKLcerkl.com HQ: Blue Ash, OH, United StatesReported employees: 51-200 | Blue Ash, OH, United States | 51-200 | Exact match | 28 contacts → |
“Cerkl Broadcast is the premier, forward-thinking employee communications suite.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | 360 SMS APP360smsapp.com HQ: Laguna Beach, CA, United StatesReported employees: 501-1,000 | Laguna Beach, CA, United States | 501-1,000 | Exact match | 28 contacts → |
“At 360 SMS, we transform and simplify communication for Salesforce users with our native messaging solution, enhancing connectivity through automated, streamlined, and omnichannel…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | VOXERvoxer.com HQ: San Francisco, CA, United StatesReported employees: 11-50 | San Francisco, CA, United States | 11-50 | Exact match | 20 contacts → |
“Voxer is a high-performance messaging app that combines the power of live voice with text, photos and videos.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Avochatoavochato.com HQ: Mill Valley, CA, United StatesReported employees: 11-50 | Mill Valley, CA, United States | 11-50 | Exact match | 19 contacts → |
“Avochato is an AI messaging platform built to help businesses have better conversations with their customers.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | GLUEglue.ai HQ: San Francisco, CA, United StatesReported employees: 1-10 | San Francisco, CA, United States | 1-10 | Exact match | 18 contacts → |
“We believe it should be easy to share the right information with the right people, both inside and outside of your team.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Kandra Labs, Inc. Creators Of Zulipzulip.com HQ: San Francisco, CA, United StatesReported employees: 11-50 | San Francisco, CA, United States | 11-50 | Exact match | 17 contacts → |
“Zulip is an open-source team chat application designed for seamless remote and hybrid work.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | TRUHUtruhu.com HQ: Pleasanton, CA, United StatesReported employees: 11-50 | Pleasanton, CA, United States | 11-50 | Exact match | 16 contacts → |
“Communicate with your employees in the simplest way possible.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | ZELOzeloapp.com HQ: San Francisco, CA, United StatesReported employees: 1-10 | San Francisco, CA, United States | 1-10 | Exact match | 16 contacts → |
“Zelo redefines how companies communicate internally.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Melpapp, INCmelp.us HQ: New York, NY, United StatesReported employees: 11-50 | New York, NY, United States | 11-50 | Exact match | 15 contacts → |
“AI Digital Workplace for Secure Cross-Enterprise Collaboration Work doesn't stop at your organization's boundaries.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Orchestraorch.so HQ: San Francisco, United StatesReported employees: 1-10 | San Francisco, United States | 1-10 | Exact match | 14 contacts → |
“Orchestra is a chat-centric workspace with built-in work tools.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Optevooptevo.com HQ: Denver, CO, United StatesReported employees: 11-50 | Denver, CO, United States | 11-50 | Exact match | 13 contacts → |
“Optevo® is building the platform for The New Style of Work® where teams think, develop ideas, collaborate, and execute in one intelligent environment.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Everleagueseverleagues.com HQ: New York, NY, United StatesReported employees: 1-10 | New York, NY, United States | 1-10 | Exact match | 11 contacts → |
“Everleagues provides the technology to bring organizations, clients, applications and data all in one secure location.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 213 company matches
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Internal messaging platforms: dataset insights
November 5, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
212 records in the displayed employee bands.
1 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 213 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: November 5, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Internal messaging platforms by metro
Questions about this company list
What does Exact match mean for internal messaging platforms?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many internal messaging platforms did RevenueBase find based in the United States?
The saved snapshot records 213 matching company records, 6,228 tracked contacts and 884 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: November 5, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Internal messaging platforms by geography
Cite this list
RevenueBase Data Team. Top 25 internal messaging platforms based in the United States. Snapshot: November 5, 2026. https://revenuebase.ai/companies/internal-messaging-platforms/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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