AstrBot vs Letta
Side-by-side comparison of two agent options that often come up together when people are choosing between self-hosted frameworks, managed assistants, and extensible AI tooling.
Open source30k stars
AstrBot
Python bot with excellent Chinese platform support (QQ, WeChat, Feishu, DingTalk)
Open source22k stars
Letta
Platform for building stateful agents with advanced memory persistence
Category
AstrBot
Letta
Tagline
Python bot with excellent Chinese platform support (QQ, WeChat, Feishu, DingTalk)
Platform for building stateful agents with advanced memory persistence
Deployment
Self-Hosted
Self-Hosted
Pricing
Free to use, with optional model or infrastructure costs if you self-host.
Usually affordable for individuals or small teams, with some recurring model or hosting costs.
Channels
QQ, WeChat, Feishu, DingTalk, Telegram, Discord, Slack, LINE
Telegram, Slack, Discord, WhatsApp, Signal
Open source
Yes
Yes
Privacy
Good privacy posture for most teams, especially when self-hosted or carefully configured.
Good privacy posture for most teams, especially when self-hosted or carefully configured.
AstrBot pros
- Open source with transparent code and flexible deployment options.
- Security posture is strong for sensitive workflows.
- Strong privacy story for users who care where data runs.
Letta pros
- Open source with transparent code and flexible deployment options.
- Strong privacy story for users who care where data runs.
- Good memory and persistence support for ongoing conversations or tasks.
AstrBot cons
- Trade-offs are moderate rather than severe, but it does not stand out sharply on every dimension.
Letta cons
- Lower autonomy — designed more as a platform than an out-of-box assistant
- Setup requires understanding memory architecture concepts
- Python-only — no native TypeScript/JavaScript implementation
AstrBot gotchas
- You should expect ongoing hosting, uptime, and secret-management work if you deploy it for real users.
Letta gotchas
- You should expect ongoing hosting, uptime, and secret-management work if you deploy it for real users.
- Recurring subscription or model spend can matter more than the headline feature list.
Not sure which one fits you?
Take the two-minute quiz and let the app rank these options against your channels, privacy requirements, deployment comfort, and budget.