Open source Slack alternatives
on Cloudflare.

Explore 3 projects with workflows mapped to Slack. Inspect the code, license, hosting conditions and replacement scope to decide which fits. Catalog approval records a source review, not a guarantee of feature parity, a running deployment or zero hosting costs.

See 3 builds ↓

3 builds·5 CF primitives wired·comms

vendor:pricing ↗

EdgeChat upstream demo interface: channels, direct messages, attachments and recorded voice; browser-memory simulation.

Mapped project

replaces Slack

EdgeChat

Self-hosted team channels, direct messages and optional file sharing on Cloudflare

Open build →Check hosting limits

How Cloudflare replaces it

Loadout most often used by the 3 builds replacing Slack.

Durable Objectsper-tenant state

in 3

Workersrequest handler

in 3

D1relational data

in 1

KVsmall values, fast reads

in 1

R2files & assets

in 1

Open source Slack alternatives compared

Every mapped project, with its stated license. The license decides what you may do with the code; the hosting bill is separate.

Projects mapped to Slack, with license and what each is
Project	License	What it is
EdgeChat	GPL-3.0-or-later	Self-hosted team channels, direct messages and optional file sharing on Cloudflare
NodeCrypt	ISC	Run ephemeral browser chat rooms on Workers and SQLite Durable Objects.
elm.chat	AGPL-3.0	Short-lived, account-free encrypted chat rooms on a Worker and Durable Object.

Not sure what a license allows? Read the plain-English guides: GPL v3, ISC, AGPL v3. See also all license guides and what self-hosting involves.

Frequently asked

Can you replace Slack with Cloudflare?+

Cloudsteading lists 3 projects with workflows mapped to Slack. Review each repository, license, replacement scope and hosting requirements. A listing does not establish complete feature parity or a tested deployment.

Which Cloudflare primitives replace Slack?+

The mapped projects list Durable Objects, Workers, D1, KV, R2. The actual combination depends on the selected repository; inspect its configuration and runtime source rather than combining every listed primitive into one architecture.

Which Slack alternative can I investigate first?+

EdgeChat — Self-hosted team channels, direct messages and optional file sharing on Cloudflare. It is a mapped workflow option, not a benchmark winner. Review its source, license, hosting conditions and documented limitations before choosing.

How much does Slack cost vs a Cloudflare-native build?+

Check Slack's current pricing at https://slack.com/pricing. A self-hosted project's costs depend on its runtime, usage and external services. Include your team's maintenance time and compare the actual feature scope.