OSS Discovery

UN
Global
PRODUCTIVITY
CLOUD-READY
ACTIVELY MAINTAINED
FREEMIUM
Letta

LETTA

Letta is an open-source platform for building self-improving AI agents with persistent memory and reasoning. Deploy personalized agents locally via CLI, equipped with skills and subagents to evolve with your workflows. Own your data, enhance productivity, and unlock adaptive AI tailored to your unique needs.

GITHUB STARS
22k
+12% this month
FORKS
2.4k
Active community
LAST PUSH
Apr 24, 2026
High momentum
WATCHERS
142
Tracking updates
LICENSE
Apache-2.0
Commercial use
Letta is an open-source platform for building self-improving AI agents with persistent memory and reasoning. Deploy personalized agents locally via CLI, equipped with skills and subagents to evolve with your workflows. Own your data, enhance productivity, and unlock adaptive AI tailored to your unique needs.

High Performance

Built for speed and minimal overhead.

Self-hostable

Docker, Kubernetes, or bare metal

Developer Native

Programmable via any language workflow

SUPPORTED LANGUAGES

Python
Python
Go
Go
Shell
Shell
C++
C++
Java
Java
Jinja
Jinja
JavaScript
JavaScript
Dockerfile
Dockerfile
TypeScript
TypeScript
Mako
Mako

VISUAL INTERFACE

Screenshot 1
Screenshot 2
Screenshot 3

The Quick Glance

Status
Active
Category
Productivity
Pricing
Freemium
Self-Hosted
No
Available on
Windows
macOS
Linux
Latest Release
0.16.7
Mar 31, 2026

Relative Standing — across 1,284 tools

STARS22k
Top 18% globally
FORKS2.4k
Top 18% in Open Source
ACTIVITYModerate
Top 64% Activity
WATCHERS142
Top 26% Community