Retrieval recall on LongMemEval-S: 99.2% R@5, and how we measured it — Mnemo Memory

Mnemo's hybrid retrieval puts the right evidence in the top 5 for 99.2% of LongMemEval-S questions — no reranker, no LLM in the loop. Full methodology, per-category breakdown, a depth-sensitivity sweep proving it isn't a candidate-pool artifact, and the limitations we're not hiding.

About Mnemo

Mnemo is the memory of how your company actually works. It learns from the tools your team already uses, like Slack, email, Jira, and GitHub, and keeps the decisions, exceptions, and lessons behind the work, including how they change. People ask in Slack; agents ask through the API, SDKs, or MCP, and answers come back with the source. US-hosted, with a free tier of 1K writes and 10K searches per month.

Explore Mnemo

• Mnemo API documentation
• Pricing
• Benchmarks
• Company Brain for Slack
• Ask Mnemo widget
• People — one memory container per person
• Daily Brief
• Memory Inbox
• Timeline
• Meeting Memory
• Chrome extension
• WhatsApp and voice-note capture
• Data-source connectors
• Framework integrations
• Trust and security
• Contact
• llms.txt
• OpenAPI 3.1 specification