Letta pricing
Letta starts at $0/mo and has a free tier, with self-serve signup.
Last checked 2026-09-01. Verify on the vendor's own page before you commit spend.
Plans
| Plan | Price | Included |
|---|---|---|
| Free | $0 /month | Limited agents, Limited usage of Letta Auto, Bring your own API keys and external coding plans |
| Pro | $20 /month | Up to 20 stateful agents, Letta Auto weekly + monthly quota, Pay-as-you-go overage |
| API Plan | $20 /month | Unlimited agents, $0.10 / active agent / mo, $0.00015 / sec tool execution, API key authentication, Pay-as-you-go LLM usage |
| Teams Pro | $20 /seat/month | Add teammates to your organization, Letta Auto weekly + monthly quota, Share agents and set access control |
| Enterprise | Custom | Volume-based pricing, Increased quotas, Role-based access control, SAML/OIDC SSO, Dedicated support |
The Free plan at $0 /month covers Limited agents, Limited usage of Letta Auto, Bring your own API keys and external coding plans, which is where an agent would start. The top plan (Enterprise) is quoted rather than listed, so anything at that volume goes through a person.
Can an agent buy this on its own?
A price is only half the question. The other half is whether software can get from landing on the site to making a paid call without a person, which is what the AgentReady measures under adopt.
For Letta, it can create an account itself; the signup flow is one an agent can actually complete; billing is self-serve.
Against that, a sales call gates access; credentials must be minted by hand in a dashboard. Each of those is a point where an unattended run stops and waits for a human.
That works out to 81/100 on adopt, against 72/100 overall.
What you are paying for
Letta is an AI research lab in San Francisco building machines that learn. They envision a future where humans coexist with digital people: experiential agents that remember everything, learn continuously, and improve themselves over time.
Next
Letta's full agent-readiness profile breaks down all 41 signals. Alternatives to Letta ranks what else does the same job.
An agent can fetch this as data: GET /v1/pricing?domain=letta.com