Persistent memory for AI agents and robots with Git-style versioning
Stage
Startup
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Founded
2024
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Based in
US
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Pricing model
Freemium
Freemium
Pricing
Self-hosted: Free, MIT licensed. Hindsight Cloud: Pay-as-you-go with free credits to start. Retain (store memories) $10.00 per million tokens, Recall (retrieve memories) $0.75 per million tokens, Reflect (synthesize patterns) $0.05 per call, Iris Extract (structured extraction) $7.50 per million tok
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Key features
Per-user persistent memory with preferences, history and decisions kept separate
Cross-session persistence allows context to survive weeks between interactions
Fast parallel retrieval in under 100ms through four strategies running simultaneously
Works with any LLM without losing learned context when swapping models
Learns from mistakes and corrects behavior on repeated problems
Automatic pattern detection synthesizes individual facts into consolidated knowledge
Conflict detection preserves both old and new states with timestamps when facts change
Integrates with 20+ coding agents including Claude Code, Cursor, and Copilot
Hybrid vector and knowledge-graph retrieval
Zero-copy state branching and merging
44 memory tools over MCP protocol
Sub-0.4ms P99 retrieval latency
Built-in importers from Mem0, Zep, Pinecone and others
Entity deduplication and linking
Offline operation with fleet synchronization
Memory Copilot for schema generation
Object storage for multimodal state
What makes it different
94.6% retrieval accuracy on LongMemEval-S, beating next-best system at 74.0%
MIT licensed open source with no usage limits, telemetry or restrictions
Reflection layer automatically builds judgment and mental models over time without manual tagging
Entity resolution handles hundreds of entities with 99.5% query reduction
Memory versioning with Git-style fork, diff and merge—test changes safely and undo mistakes
Native MCP integration: one URL works with Claude, Cursor, Windsurf and any MCP client
Seamless migration from Mem0, Zep, Pinecone and other systems without data loss
Vectorize
Axonio