Letta

Emerging

Open-source AI agent framework (formerly MemGPT). Three-tier persistent memory. $10M seed from Felicis. Letta Code #1 on Terminal-Bench. Jeff Dean backed.

Updated April 2026

Company Overview

Letta is the open-source platform for stateful AI agents with persistent memory, evolved from MemGPT research. Three-tier memory: core (in-context), archival (vector store), recall (conversation). $10M seed led by Felicis with angels Jeff Dean, Clem Delangue, Cristobal Valenzuela. Letta Code (March 2026): #1 model-agnostic agent on Terminal-Bench coding benchmark.

Revenue
$10M
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