What is the best alternative to Slack?

This directory does not rank one alternative above the others, because the criteria it records are structural rather than qualitative. The curated alternatives to Slack are Zulip, Discord, and the table above compares each on category, focus, source repository, documentation, and agent surfaces.

Are these Slack alternatives free?

This directory does not record verified pricing, so it does not claim any of these are free. It records whether each product publishes a public source repository, which is a different question. Check each product's own pricing page for current terms.

Slack

Alternatives

Alternatives to Slack

2 curated alternatives to Slack are listed here: Zulip, Discord. Slack is listed under Community platforms. The table compares every option on the same criteria, drawn from what each product publishes.

By Fabian HugUpdated July 22, 2026

Curated alternatives

Zulip

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Open-source threaded team chat; the community home of Rust and other projects that outgrew unthreaded chat.

Discord

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Real-time chat platform used by developer communities for group communication and community building.

Also in this space

Ranked by shared tags rather than picked by hand.

AdvocuRuns developer ambassador and experts programs: applications, activity tracking, and program reporting in one place.Answer OverflowIndexes Discord help channels into Google so community answers become searchable content.Apache AnswerOpen-source Q&A platform for running a self-hosted developer support forum with reputation and moderation.BevyPlatform for distributed chapter and meetup programs; powers Google Developer Groups and CNCF community groups.

Compared on the same criteria

Slack and Zulip and Discord and Advocu and Answer Overflow and Apache Answer and Bevy compared on the same criteria
Criterion	Slack	Zulip	Discord	Advocu	Answer Overflow	Apache Answer	Bevy
Category	Tools	Tools	Tools	Tools	Tools	Tools	Tools
Type	Community platforms	Community platforms	Community platforms	Community platforms	Community platforms	Community platforms	Events & speaking
Focus	community, chat	community, chat, open-source	community, chat	advocacy, community	community, seo	community, forum, open-source	events, community
Public source repo	Not stated	Yes	Not stated	Not stated	Yes	Yes	Not stated
Last commit	Not stated	Jul 2026	Not stated	Not stated	Jul 2026	Jul 2026	Not stated
Stars	Not stated	25k	Not stated	Not stated	1.9k	15k	Not stated
Documentation	Yes	Yes	Yes	Not stated	Not stated	Yes	Not stated
llms.txt	Yes	Not stated	Yes	Not stated	Not stated	Not stated	Not stated
Link verified	Jul 15, 2026	Jul 15, 2026	Jul 15, 2026	Jul 15, 2026	Not stated	Jul 15, 2026	Jul 15, 2026
Listed since	Jul 12, 2026	Jul 12, 2026	Jul 8, 2026	Jul 12, 2026	Jul 8, 2026	Jul 12, 2026	Jul 12, 2026

Questions

What is the best alternative to Slack?: This directory does not rank one alternative above the others, because the criteria it records are structural rather than qualitative. The curated alternatives to Slack are Zulip, Discord, and the table above compares each on category, focus, source repository, documentation, and agent surfaces.
Are these Slack alternatives free?: This directory does not record verified pricing, so it does not claim any of these are free. It records whether each product publishes a public source repository, which is a different question. Check each product's own pricing page for current terms.

How to read this

Every fact on this page is copied from the product's own site or repository and dated. We do not test these tools hands-on, we do not verify pricing, and the criteria are structural (what a product publishes) rather than qualitative (how well it works). Where a product does not state something, the table says so instead of guessing.