Memory systems
Letta (ex-MemGPT)
Stateful agent runtime; model manages own memory (MemFS, git-backed Context Repositories)
Open source + paid cloudself-hostable
★ 3,812 on GitHub · +4 today · last commit Nov 10, 2026
At a glance
- Vendor
- Letta
- Business model
- Open source + paid cloud
- Pricing
- Free (3 agents, BYOK); Pro $20/mo; API $20/mo + $0.10/agent/mo + usage pricing page ↗
- License
- Apache-2.0
- Self-hosting
- Yes, can be self-hosted
- Access
- REST API, Agent SDK, ADE, CLI
- Architecture
- agent-native filesystem memory
- Funding
- $10M seed Sept 2024 (Felicis); Berkeley AI spinout
GitHub activity
This product has a public repository, so we read it nightly from the GitHub API. Stars measure developer attention, not quality or market share.
“Agents that self-improve with experience” (repository description)
- Stars
- 3,812
- Change since last reading
- +4
- Forks
- 471
- Open issues
- 340
- Last commit
- Nov 10, 2026 (0 days ago)
- License (GitHub)
- Apache-2.0
Links and sources
- Official sitewww.letta.com/agent
- Pricingwww.letta.com/pricing
- GitHub repositorygithub.com/letta-ai/letta-code