--- title: "7 Best Slack Alternatives in 2026 (Compared)" description: "Looking for a Slack alternative? Compare the best Communication alternatives to Slack by pricing, free tiers, and features — find the right fit for your startup." source: https://appstackbuilder.com/tool-alternatives/slack retrieved: 2026-08-30 --- Communication # The 5 Best Slack Alternatives in 2026 Looking for an alternative to [Slack](https://appstackbuilder.com/tools/slack)? Below we compare the best communication alternatives by pricing, free tiers, and what each is best for — so you can pick the right fit for your budget and stack. Category Communication Slack pricing Free tier available Free tier Yes Alternatives 5 compared ## Slack vs Alternatives — Quick Comparison | Tool | Pricing | Free tier | Rating | Best for | | ----------------------------------------- | ------------------------- | --------- | ------ | ----------------------------------- | | [Slack](https://appstackbuilder.com/tools/slack)You searched | Free · paid from $8.75/mo | ✓ | — | Communication | | [Zulip](https://appstackbuilder.com/tools/zulip) | Free · paid from $6.67/mo | ✓ | 4.4 | Communication — chat, threading | | [Mattermost](https://appstackbuilder.com/tools/mattermost) | Free | ✓ | 4.2 | Communication — chat, collaboration | | [Microsoft Teams](https://appstackbuilder.com/tools/microsoft-teams) | Free | ✓ | 4.2 | Communication — chat, video | | [Rocket.Chat](https://appstackbuilder.com/tools/rocket-chat) | Free | ✓ | 4.1 | Communication — chat, self-hosted | | [Discord](https://appstackbuilder.com/tools/discord) | Free · paid from $9.99/mo | ✓ | — | Communication | ## Top Slack Alternatives, Explained ![Zulip](https://www.google.com/s2/favicons?domain=zulip.com&sz=128) ### 1. Zulip Free tier4.4· Free · paid from $6.67/mo Zulip is an open-source team chat app built around topic-based threading, which keeps conversations organized and async-friendly far better than flat channels. Self-host for free, or use Zulip Cloud (Standard \~$6.67/user/month; free for open-source/non-profits). * ✓Best-in-class threading model * ✓Open-source & self-hostable * ✓Excellent for async/remote [Zulip pricing & review ](https://appstackbuilder.com/tools/zulip) ![Mattermost](https://www.google.com/s2/favicons?domain=mattermost.com&sz=128) ### 2. Mattermost Free tier4.2· Free Mattermost is an open-source, self-hostable messaging and collaboration platform popular with security-conscious organizations that need data control. Self-host free; paid Professional/Enterprise tiers add advanced compliance and support. * ✓Self-hosted data control * ✓Open-source * ✓Slack-like experience [Mattermost pricing & review ](https://appstackbuilder.com/tools/mattermost) ![Microsoft Teams](https://www.google.com/s2/favicons?domain=microsoft.com&sz=128) ### 3. Microsoft Teams Free tier4.2· Free Microsoft Teams is a collaboration hub combining chat, video meetings, file sharing, and app integrations, deeply tied into Microsoft 365\. A free tier covers basic chat and meetings; paid comes via Microsoft 365 Business plans. * ✓Deep Microsoft 365 integration * ✓Enterprise-grade security * ✓Free tier available [Microsoft Teams pricing & review ](https://appstackbuilder.com/tools/microsoft-teams) ![Rocket.Chat](https://www.google.com/s2/favicons?domain=rocket.chat&sz=128) ### 4. Rocket.Chat Free tier4.1· Free Rocket.Chat is an open-source communications platform (chat, voice, video, omnichannel) that you can fully self-host for complete data control. Popular with governments and regulated industries; paid tiers add enterprise features and support. * ✓Full data sovereignty (self-host) * ✓Open-source * ✓Omnichannel features [Rocket.Chat pricing & review ](https://appstackbuilder.com/tools/rocket-chat) ![Discord](https://appstackbuilder.com/discord.svg) ### 5. Discord Free tier· Free · paid from $9.99/mo Discord offers free voice channels, video chat, and text messaging. Originally for gamers, it's now widely used by developer communities, open source projects, and startups. [Discord pricing & review ](https://appstackbuilder.com/tools/discord) ## Frequently Asked Questions What are the best alternatives to Slack in 2026?⌄ The best Slack alternatives in 2026 are Zulip, Mattermost, Microsoft Teams, Rocket.Chat, Discord. Each is a communication option you can compare on pricing, free tiers, and features in the table above. Is there a free alternative to Slack?⌄ Yes — Zulip, Mattermost, Microsoft Teams offer free tiers, making them strong free Slack alternatives for bootstrapped startups. Why look for a Slack alternative?⌄ People compare communication tools on pricing, specific feature gaps, ease of use, and whether an open-source or free-tier option exists — so they can pick the best fit for their stack and budget. What is the cheapest Slack alternative?⌄ Zulip is among the most affordable Slack alternatives — free · paid from $6.67/mo. Check the comparison table above for the full pricing breakdown. Which Slack alternative is rated highest?⌄ Zulip is the highest-rated Slack alternative in our catalog at 4.4 out of 5, making it a strong pick if you want a well-reviewed option. ## Find your perfect communication tool Skip the research. 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