Letta API / Letta Code
letta.com
Open sourceNo card
Stateful AI agent platform with persistent memory, CLI and self-hosting.
- Free tier
- Yes
- Per month
- Free – $20/seat
- MCP
- No
Why it's here
Persistent-memory agents, CLI and MCP with a free BYO-key tier; complex behavior still needs code.
Free tier
Three stateful agents with bring-your-own model access.
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Last verified
Agent Frameworks
#20 of 26Persistent-memory agents, CLI and MCP with a free BYO-key tier; complex behavior still needs code.
| per month | FreeFree3 agents; BYOK | Pro$2020 agents; model overages extra | API Planfrom $20$0.10/active agent/mo + $0.00015/tool-sec | Teams Pro$20/seat+ model usage and overages | EnterpriseCustomCustom quota and support |
|---|---|---|---|---|---|
| Native agents | |||||
| Own LLM keys | |||||
| No usage meter | |||||
| Built-in RAG | |||||
| API & embed | |||||
| MCP tools | |||||
| Triggers | |||||
| Human approval | |||||
| Run logs | |||||
| Team seats | 1 seats | 1 seats |