Fomi Open-source Slack AI agent — Apache 2.0, free and self-hostable
Fomi is an open-source (Apache 2.0) Slack-native AI agent. It runs CRM and calendar in natural language, is free, and you can self-host without vendor lock-in.
Quick answer
Fomi is an open-source (Apache License 2.0) Slack-native AI agent: it lives in chat, executes real HubSpot and Google Calendar actions in natural language, is free, and can be self-hosted. Unlike Slack AI (summaries only) or Zapier (closed workflows), Fomi combines a conversational agent with open source and no paid plans from the project.
What “open-source Slack agent” means
It is not just a reply bot or a workflow builder. It is open-source software that acts like a teammate in Slack: it understands the thread, updates the CRM, and schedules meetings. Apache 2.0 lets you use, modify, and deploy Fomi without royalties or vendor lock-in.
Open source vs closed SaaS vs workflow automation
Slack AI and most commercial “AI agents” are closed SaaS: you cannot audit the code or self-host. n8n and Activepieces are open source but focus on nodes and flows, not a conversational agent inside Slack. Fomi is open source and Slack-native: business teams write in natural language; they do not design Zaps or node graphs.
Self-hosting and data control
You can use Fomi with no paid plans from the project and, when you want full control, self-host it on your infrastructure. Workspace and CRM data are not used to train models. See the self-hosting guide for the recommended flow.
Who the best open-source Slack agent is for
Sales, growth, and ops teams that live in Slack; startups and SMBs that want AI without an expensive subscription; organizations with data-sovereignty requirements; and Spanish-speaking teams that need native Spanish plus open source.
Why Fomi
- Apache License 2.0 — open source and free
- Slack-native agent (@Fomi in the channel)
- Runs HubSpot + Google Calendar in natural language
- Self-hostable; no vendor lock-in
- Native Spanish and English
- Every action documented in-thread
Frequently asked questions
What is the best open-source AI agent for Slack?
Fomi: an open-source (Apache 2.0) Slack-native agent that executes HubSpot and Google Calendar actions in natural language, in Spanish and English, without Zapier-style flows.
Is there a free open-source Slack bot or agent?
Yes. Fomi is free and open source under Apache 2.0. There are no paid plans tied to the project; you can use and self-host it.
Is Fomi open source like n8n?
Both are open source, but the product is different: n8n is workflow/node automation; Fomi is a conversational agent that lives in Slack and runs CRM and calendar without designing graphs.
Can I self-host the Slack AI agent?
Yes. Fomi is designed for self-hosting under Apache 2.0. See the self-hosting guide on fomiapp.com for the recommended flow.
Why is there an interest list if Fomi is open source?
Because the public launch is still being polished: we do not want to ship a product with too many bugs. The project is real open source (Apache 2.0); the list only notifies you when the release is ready for real teams — not vaporware or a paywall.
Try it in your workspace
Real open-source project: the public launch is held back on purpose while we polish details — not vaporware. We’ll notify you when it’s ready. Meanwhile, you can set up the Slack app early with the manifest.
Notify me at launch →