Drilldown: tool

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tool (39)

tool > company

: Element

or Mattermost

& category: Other

Use the filters below to narrow your results.

open-source Slack alternative with self-hosted free tier (1) · self-hostable, federated encrypted messaging (Matrix) (1)

https (2)

element.io (1) · mattermost.com (1)

free (2)

Client and Matrix server software (Synapse/Dendrite/Conduit) are free and open source; self-host at only your hosting cost, use the free matrix.org homeserver, or buy Element's hosted plans. (1) · Professional $10/user/mo; Enterprise custom pricing (self-hosted free tier available) (1)

open (2)

hybrid (1) · self (1)

End-to-end encrypted chat on the Matrix open standard. Anyone can run a homeserver and servers federate like email; Element is the reference client. 115M+ addressable accounts, with bridges to Signal, Telegram, WhatsApp and others. (1) · Self-hostable, MIT-licensed team chat closely modeled on Slack's channel-based UX -- includes a Slack export/import path to ease migration. Free self-hosted tier runs indefinitely with no per-seat licensing cost; paid tiers add SSO, compliance exports, and HIPAA/FedRAMP-aligned deployment options. (1)

None (1) · Fewer native integrations than Slack out of the box -- most third-party connections go through incoming/outgoing webhooks rather than a marketplace, so budget some setup time. Good fit for teams that want a near drop-in Slack replacement and value Go-based, ops-friendly self-hosting. (1)

None (1) · Relying on the public matrix.org homeserver reintroduces an operator/jurisdiction -- self-host to get the benefit. Discord and Slack are centralized and not end-to-end encrypted. (1)

Showing below up to 2 results in range #1 to #2.

E

Element - self-hostable, federated encrypted messaging (Matrix)

M

Mattermost - open-source Slack alternative with self-hosted free tier

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