Letta vs R2R
A side-by-side comparison of two self-hosted self-hosted ai options — licensing, setup difficulty, resource needs, and what each one replaces.
Not the right match-up?
Letta
Build stateful LLM agents with long-term memory
VS
R2R
Production-ready RAG engine with a RESTful API
| Feature | Letta | R2R |
|---|---|---|
| Category | Self-Hosted AI | Self-Hosted AI |
| License | Apache-2.0 | MIT |
| Language | Python | Python |
| Setup difficulty | Medium | Medium |
| Min. RAM | 2,048 MB | 4,096 MB |
| Deployment | docker, source | docker, source |
| GitHub stars | ★ 24,149 | ★ 7,950 |
| First released | 2023 | 2024 |
| Replaces | OpenAI Assistants | OpenAI Assistants |
Why pick each one
Choose Letta if…
- Released under the Apache-2.0 license
- First-class Docker support for quick deployment
- Mature project with 24.1k GitHub stars
- Written in Python
Choose R2R if…
- Released under the MIT license
- First-class Docker support for quick deployment
- Mature project with 8k GitHub stars
- Written in Python
Frequently asked questions
Is Letta or R2R better?
Neither is universally better. Letta has the larger community; both share a medium setup difficulty, so the decision comes down to features and licensing.
Are Letta and R2R free and open-source?
Yes. Letta is licensed under Apache-2.0 and R2R under MIT. Both can be self-hosted at no software cost.
Can I run Letta and R2R with Docker?
Letta: yes. R2R: yes.