# Letta

> Open-source platform from the creators of MemGPT for stateful AI agents that keep long-term memory and learn over time. Use the Letta Code app (npm i -g @letta-ai/letta-code), the hosted API, or self-host the open-source server. Advanced: best for people comfortable with a terminal or APIs.

- **Category:** Agent Tools
- **Official site:** https://www.letta.com
- **Pricing (summary; confirm on vendor site):** Free $0/mo (up to 3 stateful agents, bring your own API keys); Pro $20/mo (up to 20 agents); API Plan $20/mo + $0.10 per active agent/mo + usage; Teams Pro $20/seat/mo; Enterprise custom
- **Pricing source:** https://docs.letta.com/pricing
- **Free / DIY path:** Use the free plan with your own API keys, or self-host the open-source server (Apache-2.0)
- **Link last checked:** 2026-10-26
- **HTML page:** https://contractoraishop.com/tools/letta

Pricing notes are summaries. Confirm current pricing on the vendor's site.
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