Both are open source harness options with comparable terms, so the choice comes down to which model of the problem you prefer — compare the descriptions below rather than the licence.
Self-hosted gateway putting an agent in Slack, Telegram, WhatsApp, Signal, Discord and iMessage at once.
One Gateway process fans out to every channel plugin. Needs Node 22.22.3+ (26 recommended); the installer provisions it.
Stateful agent server where memory is the primary abstraction.
| OpenClaw | Letta | |
|---|---|---|
| Licence | Open source | Open source |
| Pricing | open source | freemium |
| Self-hostable | Yes | Yes |
| Languages | Any language | Python, TypeScript |
| Install | curl -fsSL https://openclaw.ai/install.sh | bash | pip install letta |
| Keys required | None | None |
Both are open source harness options with comparable terms, so the choice comes down to which model of the problem you prefer — compare the descriptions below rather than the licence. OpenClaw: Self-hosted gateway putting an agent in Slack, Telegram, WhatsApp, Signal, Discord and iMessage at once. Letta: Stateful agent server where memory is the primary abstraction.
OpenClaw can run on your own infrastructure. Letta can run on your own infrastructure.
OpenClaw is open source (open source). Letta is open source (freemium).
Every page here answers to Accept: text/markdown and returns the same content at roughly a tenth the tokens. No separate site, no toggle — same URL.
curl -s -H "Accept: text/markdown" https://newagent.build/compare/openclaw-vs-letta