Listed alphabetically. A tool is ranked by its reviews once it has 3.
| Tool | Reviews | Lowest paid plan | Free plan | Free trial | Public API | Runs on | Main features |
|---|---|---|---|---|---|---|---|
 CampfireSuper simple group chat, without a subscription, and you get the code too. | ReviewsNone yetWrite one for Campfire | Lowest paid planNot confirmed | Free planYes | Free trialNot confirmed | Public APIYes | Runs onWeb, PWA | Main features
|
 ChantyOne workspace for your employees and AI agents | ReviewsNone yetWrite one for Chanty | Lowest paid plan$3per user per month, billed annuallyBusiness, as of October 23, 2026 | Free planYes | Free trialNot confirmed | Public APINot confirmed | Runs onWeb, macOS, Windows, Linux, iOS, Android | |
 ElementSecure communications built on the decentralised Matrix open standard | ReviewsNone yetWrite one for Element | Lowest paid planSee plans | Free planYes | Free trialNot confirmed | Public APINot confirmed | Runs onWeb, macOS, Windows, Linux, iOS, Android | Main features |
 FlockOne shared space for all your cross-functional work | ReviewsNone yetWrite one for Flock | Lowest paid plan$4.50per user per month, billed annuallyPro, as of October 23, 2026 | Free planYes | Free trial30 days | Public APIYes | ||
 LarkLark is a productivity superapp for teams with chat, docs, meetings, workflow automations and AI. | ReviewsNone yetWrite one for Lark | Lowest paid plan$6per user per monthBasic, as of October 28, 2026 | Free planYes | Free trialNot confirmed | Public APIYes | ||
 Microsoft TeamsChat, collaborate, and meet with anyone, anywhere | ReviewsNone yetWrite one for Microsoft Teams | Lowest paid plan$4.00per user per month, paid yearlyMicrosoft Teams Essentials, as of October 20, 2026 | Free planYes | Free trialNot confirmed | Public APINot confirmed | Runs onWindows, macOS, iOS, Android | |
 PumbleThe all-in-one team communication app | ReviewsNone yetWrite one for Pumble | Lowest paid planSee plans | Free planYes | Free trialNot confirmed | Public APIYes | Runs onWeb, macOS, Windows, Linux, iOS, Android | |
 Rocket.ChatOne secure platform for messaging, voice, video, apps and AI | ReviewsNone yetWrite one for Rocket.Chat | Lowest paid planSee plans | Free planYes | Free trialNot confirmed | Public APIYes | Runs oniOS, Android | |
 SlackAll your people and AI agents working together | ReviewsNone yetWrite one for Slack | Lowest paid plan$8.75per user per month, paid monthlyPro, as of October 20, 2026 | Free planYes | Free trialNot confirmed | Public APIYes | Runs on | |
 WireMessaging, calls, conferencing, and file sharing, fully end-to-end encrypted and open source. | ReviewsNone yetWrite one for Wire | Lowest paid plan€7.45per person per month, billed annuallyWire for SMB, as of October 28, 2026 | Free planYes | Free trialNot confirmed | Public APINot confirmed | Runs onAll platforms, Web | |
| Zoho CliqBusiness communication software for teams | ReviewsNone yetWrite one for Zoho Cliq | Lowest paid planUS$2Professional, as of October 28, 2026 | Free planYes | Free trial15 days | Public APIYes | ||
 ZulipOrganized chat for distributed teams | ReviewsNone yetWrite one for Zulip | Lowest paid plan$6.67per user per month, billed annually, or $8 billed monthlyStandard, as of October 20, 2026 | Free planYes | Free trialNot confirmed | Public APIYes |
From each tool's own website. “Not confirmed” means we couldn't confirm it there, not that the tool doesn't have it. Each tool's page says when its facts were checked.
How this list is made
A tool is listed here only when we've confirmed on its own website that it has a free plan. Tools we couldn't confirm it for are left out, even if they may have it. Vendors can't pay for a place on this list. Add a tool we missed