Letta vs 
Julep
Letta vs Julep compared for 2026 — features, license, ease of use, performance and which one to choose. Stateful agents with long-term memory vs Stateful agents as a service.
Updated regularly · curated by OpenSourceAI.tech
Letta vs Julep at a glance
| Spec | Letta | Julep |
|---|---|---|
| Category | AI agent framework | AI agent framework |
| Type | Agent runtime (memory) | Agent backend |
| License | Apache-2.0 | Apache-2.0 |
| Runs locally | Self-hosted | Yes |
| Primary language | Python | Python |
| Ease of use | Advanced | Intermediate |
| Best for | agents that remember across sessions | agents that must run for days, not seconds |
| GitHub stars | 23.8k | 6.6k |
How Letta and Julep score
| Criterion | Letta | Julep |
|---|---|---|
| Popularity | 3.5 | 2.5 |
| Maintenance | 5.0 | 5.0 |
| Ease of use | 2.5 | 3.5 |
| Privacy | 4.5 | 5.0 |
| License freedom | 5.0 | 5.0 |
Scores are computed automatically from public signals — GitHub stars (popularity), recent commit activity (maintenance), license type (freedom), local-first design (privacy) and onboarding complexity (ease of use). Indicative, not a verdict.
What each one is
Letta
Letta (formerly MemGPT) is a framework and server for building stateful agents with long-term memory that persists across sessions, with a visual agent editor.
- Persistent long-term agent memory
- Server with REST API and visual editor
- Model-agnostic and self-hostable
Julep
Julep provides a backend for long-running, stateful agents with persistent memory and scheduled tasks, so your agents survive restarts.
- Persistent state across sessions
- Scheduled and long-running tasks
- Self-hostable backend
Key differences
Letta is agent runtime (memory), while Julep is agent backend. Letta leans more advanced-friendly, whereas Julep is more suited to intermediate users. They also differ in how they run (Self-hosted vs Yes). In short, Letta fits agents that remember across sessions, and Julep fits agents that must run for days, not seconds.
Which should you choose?
Choose Letta for agents that remember across sessions. Choose Julep for agents that must run for days, not seconds.
There is rarely one winner — many setups use both. The right pick depends on your hardware, your team's skills, and whether you value simplicity or control.
Frequently asked questions
Is Letta or Julep easier to use?
Julep is generally the easier of the two to get started with, while Letta rewards more setup with more control.
Are Letta and Julep free?
Letta is free and open source (Apache-2.0), and Julep is free and open source (Apache-2.0). Neither charges for the core software.
Can I run Letta and Julep locally?
Letta: self-hosted · Julep: yes. Both can be used without sending your data to a third-party cloud where their setup allows.
Letta vs Julep — which should I pick in 2026?
Choose Letta for agents that remember across sessions. Choose Julep for agents that must run for days, not seconds.
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