Founded by the team behind MemGPT (formerly known as MemGPT), Letta provides infrastructure for building agents with long-term memory. Open-source framework + managed cloud platform.
How Letta compares with its closest alternatives
All 5 closest alternatives have a free plan, as Letta does. All 5 offer an API, as Letta does. Letta offers a desktop app. Of the alternatives, 2 offer a desktop app. Letta was founded in 2023; the alternatives on record were all founded in 2023. Letta is based in San Francisco, United States. Of its alternatives, only Open Interpreter has a headquarters on record, in the United States.
Market position · Agents
How Letta compares in Agents
Letta has high opportunity and sits in the top third of 423 live Agents tools on FalcoScan. Across Agents, the average opportunity score is 72.6 and the average saturation score 31.5. FalcoScan rates Letta's own market position as open. 179 of the 423 operating Agents tools have hot momentum, and FalcoScan has recorded 15 shutdowns in the category.
The closest alternatives to Letta that are still running, matched on the AI capabilities, uses and audience they share, are Phidata, Open Interpreter, Nous Hermes, SuperAGI Cloud, and Camel AI.
Is Letta still running?
Yes. As of 2 November 2026, FalcoScan lists Letta as operating at letta.com.
Where is Letta based?
Letta is headquartered in San Francisco, United States.
Does Letta have an API?
Yes. Letta offers an API.
Who is Letta for?
Letta is built for developers and ai engineers.
How do I sign in to Letta?
Sign in on Letta's own website, letta.com. FalcoScan reviews Letta but does not run its accounts, so logins, passwords and billing are handled by Letta directly.