A code library from the LangChain team for building AI agents that can pause, remember where they were, and pick back up later — even after a server restart — instead of losing all progress if something goes wrong mid-task.
langchain.com
Alternatives to
Letta
Best alternatives to Letta in 2026
Some teams want an AI agent's memory managed for them; others want full control over exactly how it works and where the data lives — the same trade-off as choosing a managed database service versus running Postgres yourself. Letta is built for the second group: it's an open-source framework, born out of academic research at UC Berkeley, for building 'stateful' AI agents that persist memory and can be run entirely on infrastructure you control. Letta grew out of MemGPT, a UC Berkeley Sky Computing Lab research project on giving language models persistent, self-editing memory, and launched as a company in September 2024. It's Apache 2.0 open source with nearly 24,000 GitHub stars and offers Letta Code, an agent coding tool that ranked #1 on the model-agnostic Terminal-Bench benchmark. Pricing spans Free (3 stateful agents, bring-your-own API keys), Personal Pro ($20/month, 20 agents with a remote sandbox), Developer API ($20/month base plus $0.10 per active agent per month, plus pay-as-you-go LLM costs), Teams Pro ($20/seat/month for collaboration features), and custom Enterprise with SSO and volume pricing.
Quick comparison of Letta alternatives
| # | Tool | Best for | Price |
|---|---|---|---|
| 1 | Développeurs construisant des agents IA en production nécessitant un contrôle fin de l'état et de la fiabilité | — | |
| 2 | Développeurs Swift/iOS/macOS construisant des agents IA avec logique multi-étapes et état persistant | — | |
| 3 | Développeurs ajoutant une mémoire persistante à des agents ou chatbots IA | — | |
| 4 | Équipes enterprise construisant des agents IA devant raisonner sur des faits qui évoluent dans le temps, notamment en secteurs régulés | — | |
| 5 | Développeurs | — | |
| 6 | Développeurs | — | |
| 7 | Designers | — |
#1
- ✓ Durable execution — resumes from a checkpoint instead of restarting after failure
- ✓ Native human-in-the-loop and short/long-term memory primitives
#2
A free, open-source Swift library that brings LangGraph's stateful, multi-step AI agent pattern natively to iOS and macOS development, without needing a separate Python backend.
github.com
- ✓ Ports the LangGraph state+graph pattern natively to Swift
- ✓ Checkpoint-based persistence, pause/resume support
#3
Gives AI chatbots and agents a real memory — so they remember what you told them last week — instead of forgetting everything the moment a conversation ends, the way most AI apps do by default.
mem0.ai
- ✓ Fournisseur mémoire exclusif d'AWS Agent SDK
- ✓ Le plus adopté de sa catégorie (61k+ stars GitHub)
#4
Builds a living map of everything a user has told an AI agent over time — and how those facts connect and change — so the agent can pull up exactly the right context in under 200 milliseconds instead of re-reading an entire chat history.
getzep.com
- ✓ Graphe de connaissances temporel, capture l'évolution des faits dans le temps
- ✓ Récupération sub-200ms revendiquée à l'échelle enterprise
FAQ about Letta alternatives
- What is the best alternative to Letta in 2026?
- Based on our selection, LangGraph is the best alternative to Letta in 2026. A code library from the LangChain team for building AI agents that can pause, remember where they were, and pick back up later — even after a server restart — instead of losing all progress if something goes wrong mid-task.. See our full ranking above to compare all options.
- Is Letta free?
- Letta is a paid tool. Several alternatives in our selection offer free or freemium versions.
- How many alternatives to Letta are there?
- mySelectas has listed 7 alternatives to Letta in the AI & Machine Learning category. Our selection is updated regularly to include the best options available.