Mnemosyne
Cognitive memory OS for AI agents (zero LLM calls)
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HN · launched Feb 24, 2026 · 5 upvotes (top 89%) · 0 views
Niche: ai agent memory infrastructure · 350 launches, 16 in the last 7 days ▼ -27% · Explore this niche →
Category and tags
- Horizontal
- Data infrastructure
- Developer
- AI-native
- Commercial product
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More like this: all 350 launches in ai agent memory infrastructure →
Could you build this?
Partial While an agent memory API can be prototyped with standard embeddings, designing a full 'cognitive memory OS' with custom non-LLM memory retrieval algorithms and state management requires advanced graph and information retrieval engineering.
What it would actually take: Requires building an embedded high-performance vector/graph hybrid database in Rust or C++, implementing custom graph-based associative memory retrieval and cognitive decay algorithms without relying on LLM summarization. The hard part is achieving deterministic, high-precision retrieval across complex conversational history in single-digit milliseconds, requiring specialized knowledge in information retrieval and memory graph structures.
Discussion
1 comment analyzed.
Competitors mentioned: Mem0, Zep, Cognee, Letta/MemGPT
Concerns raised: LLM API costs at scale ($1,000-3,000/month for 100K memories), Stochastic variance in LLM-based extraction systems
Competitors
Other products that read as similar to this one : 5313 launches clear the similarity bar, closest 8 shown.
Attention rank: #4929 of 5314 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 118 days after the earliest competitor.
- Hebbs · hn · 2026-03-09 · 6 upvotes · similarity 0.77
- loci · github · 2026-10-01 · 26 upvotes · similarity 0.75
- A memory learning layer for AI agents to learn on the job · hn · 2026-01-23 · 6 upvotes · similarity 0.74
- I open-sourced two AI agents with real memory (chat and voice, MIT) · hn · 2026-05-26 · 5 upvotes · similarity 0.73
- Hippo, biologically inspired memory for AI agents · hn · 2026-04-06 · 128 upvotes · similarity 0.72
- IHMT-MEMORY · github · 2026-09-30 · 17 upvotes · similarity 0.71
- Friday · hn · 2026-09-16 · 9 upvotes · similarity 0.70
- dolphinbench · github · 2026-09-22 · 29 upvotes · similarity 0.70
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