Best Free Team Collaboration Tools

Chanty is another alternative to Slack. It has a free forever plan for small teams (up to 5) with unlimited public and private conversations, searchable history, unlimited 1:1 audio calls, unlimited voice messages, ten integrations, and 20 GB storage per team. Best for startups and unlimited usage needs.

A modern knowledge management service for teams. Free for up to 10 users.

Secure Video and Web conferencing add-ons available. The free plan is limited to 40 minutes.

Reserve and lock shared resources within Slack like Rooms, Dev environments , servers etc. Free for upto 2 resources

Daily reports of your team's Commit and Pull Request activity on GitHub. Includes Push visualizer, peer recognition system, and custom alert builder. The free tier has unlimited users, three repos, and 3 alert configs. Best for unlimited usage needs.

Real time collaboration & writing tool for markdown format docs/files. Like Google Docs but for markdown files. Free unlimited number of "notes", but the number of collaborators (invitee) for private notes & template [will be limited](https://hackmd.io/pricing). Best for unlimited usage needs.

Find the perfect time and date for a meeting. Simple to use, works great for small and large groups.

Team Collaboration free for 25 users with three groups, three custom apps, 3 Boards, 3 Manuals, and 10 Integrations along with channels, events & forums.

Free all-on-one bookmark manager, tab manager, and task manager in a customizable online desktop with folder collaboration.

An asynchronous-friendly team communication app where conversations stay organized and on-topic. Free and Unlimited plans are available. Discounts are provided for eligible teams. Best for unlimited usage needs.

Visual collaboration app used for brainstorming, content curation, and notes. Free for up to 3 Walls, unlimited users, and 1 GB storage. Best for unlimited usage needs.

Private document editor hosted in Canada. Write, format, collaborate, and publish documents with clean public links. Data is never used for AI training. Free plan includes 50 MB storage, up to 3 public links, and export to PDF, Word, and Markdown.

A decentralized and open-source communication tool built on Matrix. Group chats, direct messaging, encrypted file transfers, voice and video chats, and easy integration with other services.

A faster way for your team to communicate. Free Unlimited Messages, Channels, Users, Apps & Integrations Best for unlimited usage needs.

Bookmark manager for teams with tagging, multi-workspaces, and collaboration. Free plan includes 4 workspaces and 10 team members.

Chat app designed for teams. Free for public access group, unlimited users, history, and integrations. also, it provides a self-hostable open-source version. Best for unlimited usage needs.

Open-source scheduling — unlimited event types, unlimited bookings, unlimited calendar connections, routing forms, workflow automation, payment processing, Cal Video conferencing. 1 user Best for unlimited usage needs.

Keybase is a FOSS alternative to Slack; it keeps everyone's chats and files safe, from families to communities to companies. Best for open source projects.

Real-time chat with a unique email-like threading model. The free plan includes 10,000 messages of search history and File storage up to 5 GB. also, it provides a self-hostable open-source version.

Open-source communication platform with Omnichannel features, Matrix Federation, Bridge with others apps, Unlimited messaging, and Full messaging history. Best for unlimited usage needs.

Video meetings with a free plan offering 40 minutes per meeting with 100 attendees.

Interactive customizable spaces for team meetings & happy hours socials. Unlimited meetings, free up to 8 concurrent users. Best for unlimited usage needs.

Now Stoat — revolt.chat redirects to stoat.chat, which serves the same product. Open-source group chat and Discord alternative: servers, channels, voice chat, file sharing, markdown, role-based permissions and moderation tools. Free; no ads and no data mining. Windows, macOS, Linux, Android, iOS and web.

Tencent Real-Time Communication (TRTC) offers solutions for group audio/video calls.10,000 free minutes/month for the first year. Note — discovered 2026-08-28: The free tier now offers a free trial with 10,000 free minutes. It's framed as a trial rather than a permanent free tier. Source ↗

One-click video conversations, and screen sharing, for free

A lightweight and collaborative wiki for all your team's knowledge, docs, and notes. Free plan with all essential features, up to 50 items, and 5GB storage.

Real-time collaboration infrastructure — unlimited MAU, 500 monthly active rooms, 256 MB realtime data + 512 MB file storage, 3 dashboard seats, 10 projects. Presence, cursors, comments, notifications, text editor components Best for unlimited usage needs.

Free screen sharing tool, share your screen with collabrators right from your browser, no download or registration needed. For free.

Chat, for GitHub. Unlimited public and private rooms, free for teams of up to 25 Best for unlimited usage needs.

Free team chat app. Unlimited users and message history, free forever. Best for unlimited usage needs.

Private and secure bookmarking app for macOS, Windows, Android, iOS, and Web. Free Unlimited Bookmarks and Collaboration. Best for unlimited usage needs.

Free group video chat. Anonymous. Peer‑to‑peer. No plugins, signup, or payment required

Talk and collaborate in real time with your team. Pair programming with IDE, terminal sharing, voice, video, and screen sharing. Free for small teams. Best for startups.

Calendly is the tool for connecting and scheduling meetings. The free plan provides 1 Calendar connection per user and Unlimited sessions. Desktop and Mobile apps are also offered. Best for unlimited usage needs.