Letta Ai Plans Pricing
Letta has separate Personal (chat UI / Letta Auto) and Developer (API) pricing tracks, plus open-source self-hosting. The Free tier supports a limited number of agents with bring-your-own model API keys. The Pro personal plan is a flat $20/month subscription with a Letta Auto quota. The Developer API plan is $20/month base plus metered usage - per active agent per month, plus per-second tool execution time - on top of pass-through, pay-as-you-go LLM usage from the configured model provider. Enterprise is custom/negotiated. The core Letta server is open source (Apache-2.0) and free to self-host, in which case you provide your own compute and model provider API keys.
Letta Ai Plans Pricing is the machine-readable pricing-plan profile for Letta on the APIs.io network, conforming to the API Commons Plans specification.
It defines 5 plans, covering free, flat, usage, and enterprise tiers, with named plans including Free, Pro (Personal), API (Developer), Enterprise, Open Source (Self-Hosted).
Tagged areas include AI, Agents, LLM, Memory, and Plans.
Plans
Free tier for evaluation, supporting a limited number of stateful agents with bring-your-own model provider API keys.
- Bring Your Own API Keys
- Limited Letta Auto Usage
Flat-rate personal plan for the Letta chat experience with a weekly and monthly Letta Auto quota and pay-as-you-go overage, supporting up to roughly 20 stateful agents.
- Up to ~20 Agents
- Letta Auto Weekly and Monthly Quota
- Pay-As-You-Go Overage
Developer plan for programmatic access via API key. Unlimited agents, billed on a base subscription plus metered active-agent and tool-execution usage, with pay-as-you-go LLM usage passed through from the configured model provider.
- Unlimited Agents
- API Key Authentication
- Pay-As-You-Go LLM Usage (pass-through)
Custom plan for high-volume or regulated deployments, with volume-based pricing, increased quotas, role-based access control, SAML/OIDC SSO, and dedicated support.
- Volume-Based Pricing
- SAML / OIDC SSO
- Role-Based Access Control
- Dedicated Support
The core Letta server is Apache-2.0 licensed and free to self-host via Docker or from source, using the same OpenAPI-documented REST interface as Letta Cloud. You supply your own compute and your own model provider API keys.
- Full REST API
- Bring Your Own Model Providers
- Docker and Source Deployment