Haystack vs Letta

FeatureHaystackLetta
CategoryAI DevelopmentAI Agent Frameworks
PricingFree (open-source)Free (open-source) + Cloud
GitHub Stars18,00013,000
PlatformsLinux, macOS, Windows, DockerLinux, macOS, Docker
Features
  • ✓ Pipeline builder
  • ✓ RAG
  • ✓ Document processing
  • ✓ Model serving
  • ✓ REST API
  • ✓ Long-term memory
  • ✓ Stateful agents
  • ✓ Tool use
  • ✓ Multi-model
  • ✓ Self-editing memory
Tags
ragnlppipelineopen-source
memorystatefulagentsopen-source