| Website | letta.com |
| Category | AI / Agent Framework |
| License | Apache 2.0 (open source) |
| Pricing | Free (open source), Cloud available |
Overview
Letta (formerly MemGPT) provides stateful AI agents with persistent memory. Long-term memory, tool use, and multi-agent orchestration.
Pros
- Apache 2.0 license
- Persistent memory management
- Long-term context beyond token limits
- Tool use framework
- Multi-agent support
- Self-hosted option
Cons
- Complex architecture
- Memory management overhead
- Performance depends on storage
- Newer framework
- Documentation evolving
Verdict
Letta solves the fundamental limitation of LLM agents: memory. By managing persistent state outside the context window, Letta agents can remember conversations, learn preferences, and maintain context across sessions without hitting token limits. For teams building AI agents that need to be genuinely stateful — customer support bots, personal assistants, research agents — Letta provides the memory architecture.