Sentio
Sentio, from Truespar, is a self-hosted email inbox API for AI agents: a Rust SMTP server that gives each agent a real address, delivers inbound mail as authenticated webhooks and lets agents reply in-thread over REST, with multi-tenant isolation.
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About Sentio
Sentio is listed in our agent infra category and is aimed at builders. Sentio, from Truespar, is a self-hosted email inbox API for AI agents: a Rust SMTP server that gives each agent a real address, delivers inbound mail as authenticated webhooks and lets agents reply in-thread over REST, with multi-tenant isolation. Pricing, as the maker states it: Free and open source (MIT or Apache-2.0), self-hosted. Maturity: Active. We last checked the official link on 2026-10-20.
Sentio at a glance
- Category: Agent infra
- Built for: Developers and teams building with AI agents
- Pricing: Free and open source (MIT or Apache-2.0), self-hosted (as the maker states it)
- GitHub: truespar/sentio · 255 stars (as of Oct 21, 2026)
- Latest release: v0.2.0, Oct 17, 2026
- Last commit: Oct 17, 2026
- Official site: truespar.com/sentio
- Listed on AgentScout: Oct 20, 2026
Sentio FAQ
What is Sentio?
Sentio, from Truespar, is a self-hosted email inbox API for AI agents: a Rust SMTP server that gives each agent a real address, delivers inbound mail as authenticated webhooks and lets agents reply in-thread over REST, with multi-tenant isolation.
How much does Sentio cost?
Sentio's pricing, as the maker states it: Free and open source (MIT or Apache-2.0), self-hosted. Check the official site for current plans.
Where can I find Sentio's source code?
On GitHub at truespar/sentio, which had 255 stars as of Oct 21, 2026. The latest release is v0.2.0 (Oct 17, 2026).
What are alternatives to Sentio?
Similar tools include Atomic Mail, SkillHub, Monid, Self Agent Vault, Tyk Gateway and Bindu.
Facts from our link-checked listing, the GitHub repository and the official site. See something wrong? Suggest an edit.
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Sentio alternatives
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Bindu
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