PerplexityvsLetta

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

Perplexity

AI Search

AI-powered search engine with real-time citations

Full review →Website ↗

Letta

AI Agent Frameworks

Build stateful AI agents with long-term memory

Full review →Website ↗
FeaturePerplexityLetta
CategoryAI SearchAI Agent Frameworks
PricingFree + Pro $20/moFree (open-source) + Cloud
GitHub Stars—
✓ More stars
13k
PlatformsWeb, iOS, AndroidLinux, macOS, Docker
Key Features
  • ✓ Real-time search
  • ✓ Citations
  • ✓ Follow-up questions
  • ✓ File upload
  • ✓ API
  • ✓ Collections
  • ✓ Long-term memory
  • ✓ Stateful agents
  • ✓ Tool use
  • ✓ Multi-model
  • ✓ Self-editing memory
Pros
  • + Answers with cited sources
  • + Real-time web search
  • + Clean, fast interface
  • + Pro Search for deeper research
  • + Free tier available
  • + Solves long-term memory problem
  • + Self-editing memory
  • + Stateful agents
  • + Multi-model support
  • + Active research backing
Cons
  • − $20/mo for Pro features
  • − Sometimes hallucinates sources
  • − Limited for non-search tasks
  • − API pricing can add up
  • − Complex memory management
  • − Performance overhead
  • − Rebranding confusion
  • − Still experimental
Tags
searchresearchcitationswebapi
memorystatefulagentsopen-source

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