LettavsJan

Full side-by-side comparison — features, pricing, platforms, and which one wins in 2026.

Letta

AI Agent Frameworks

Build stateful AI agents with long-term memory

Full review →Website ↗

Jan

Chat Interfaces

Open-source ChatGPT alternative that runs locally

Full review →Website ↗
FeatureLettaJan
CategoryAI Agent FrameworksChat Interfaces
PricingFree (open-source) + CloudFree (open-source)
GitHub Stars
13k
✓ More stars
25k
PlatformsLinux, macOS, DockermacOS, Linux, Windows
Key Features
  • ✓ Long-term memory
  • ✓ Stateful agents
  • ✓ Tool use
  • ✓ Multi-model
  • ✓ Self-editing memory
  • ✓ Local inference
  • ✓ Model library
  • ✓ Extensions
  • ✓ Privacy-first
  • ✓ Offline mode
Pros
  • + Solves long-term memory problem
  • + Self-editing memory
  • + Stateful agents
  • + Multi-model support
  • + Active research backing
  • + Beautiful desktop app
  • + 100% offline capability
  • + Clean model management
  • + Extensions system
  • + Privacy-first design
Cons
  • − Complex memory management
  • − Performance overhead
  • − Rebranding confusion
  • − Still experimental
  • − Limited model selection vs Ollama
  • − Newer, less mature
  • − Some features still in development
  • − Can be slow on older hardware
Tags
memorystatefulagentsopen-source
localprivacychatopen-source

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