LE
Letta
Code editors & dev tools
Letta review and best-fit guide
Open-source platform and SDK for creating stateful AI agents with persistent, editable memory.
Editorial verdict
A genuinely differentiated infrastructure tool for applications where an agent must learn and retain context across sessions.
Letta treats memory and agent state as durable, inspectable parts of the system instead of hiding them inside an ephemeral conversation.
Where it stands out
Agent memoryStateful agentsOpen sourceDeveloper SDK
How to use this guide
- Use the best-fit note to decide whether the tool matches your workflow.
- Check provider support before committing to a model-specific process.
- Verify current pricing and product availability on the vendor site before buying.