Letta
Letta is a chatbot or AI agent platform for conversational automation, support, or multi-agent workflows.
Pros
- Self-improving AI agents with evolving memory and identity systems
- Based on MemGPT research from UC Berkeley Sky Computing Lab
- Designed for multi-agent and autonomous reasoning workflows
Cons
- Pricing and tier structure not disclosed on official website
- Product positioning emphasizes research over commercial features
- Limited transparency on scalability for enterprise deployments
Cost
Free costs $0 per month and covers a limited number of agents plus Letta Auto usage on your own model API keys; Pro is $20 per month with a Letta Auto quota, pay-as-you-go overage and up to 20 stateful agents; the developer API plan is $20 per month as a base and then meters usage, with unlimited agents at $0.10 per active agent per month and $0.00015 per second of tool execution; Teams Pro is $20 per seat per month and Enterprise is quoted on volume with higher quotas, SAML/OIDC single sign-on and dedicated support. Every rate is billed monthly, and model usage is charged at the underlying token cost of whichever model runs.
Verdict
Best for AI researchers and developers building agentic systems that learn and improve over time through memory mechanisms.
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