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semantic search and rag tools

Recent window: last 5.4 months (2026-05-01 → 2026-10-11), compared with the prior 5.4 months.

horizontal · 77 members · Data as of 2026-10-14

Semantic search and RAG tools enable developers and knowledge workers to index, retrieve, and surface unstructured data using vector embeddings and contextual relevance. Teams implement these platforms to power local file discovery, code exploration, and context-rich retrieval for autonomous AI agents. Unlike standard keyword search engines or raw database storage, these tools focus on understanding user intent and preparing relevant context specifically for generative models.

This theme's recent-window count is below the current min-count filter, so it does not appear in the opportunity scorecard.

Pulled from real Hacker News comment threads on this niche's launches.

Most asked for

Concerns raised

Compared to

Members

Name Source Upvotes ▼ Launched
DigUp GITHUB 1724 2026-10-08
AnySearch PH 620 2026-07-06
I used Claude Code to discover connections between 100 books HN 524 2026-01-10
SCM GITHUB 420 2026-10-03
Use Claude Code to Query 600 GB Indexes over Hacker News, ArXiv, etc. HN 397 2025-12-31
PageIndex PH 376 2026-08-28
Dotient PH 269 2026-06-28
OSS AI agent that indexes and searches the Epstein files HN 211 2026-01-14
Perplexity API Platform PH 202 2026-03-31
vectorcraft GITHUB 197 2026-09-30
Omni HN 177 2026-03-02
multimodal-product-discovery GITHUB 134 2026-09-26
jev-semgrep GITHUB 133 2026-09-19
Captain - The Reliable Alternative to RAG YC 115 2025-11-07
Moss: Real-time Semantic Search for Conversational AI YC 107 2025-10-30
Ktx HN 93 2026-05-28
jev-doc-search GITHUB 93 2026-09-30
advocaat GITHUB 86 2026-09-16
CodeRLM HN 81 2026-02-11
Upsolve Data Models PH 76 2026-09-30
jevgrep GITHUB 66 2026-09-20
pensieve GITHUB 51 2026-10-08
truffler GITHUB 50 2026-09-25
filedig GITHUB 36 2026-10-11
Browser Buddy - Discover interesting Internet writing YC 36 2025-11-13
better-context-engine GITHUB 35 2026-09-10
kevMac GITHUB 32 2026-09-20
ontoquery GITHUB 30 2026-10-08
blink GITHUB 27 2026-09-16
ventanilla GITHUB 24 2026-10-05
ATENA GITHUB 22 2026-10-06
Sezwhere HN 19 2026-09-29
Pgsemantic HN 18 2026-03-25
jgrep GITHUB 18 2026-09-18
sec-search-rl GITHUB 17 2026-09-17
RAGE GITHUB 17 2026-09-14
zhiyuan-rag GITHUB 16 2026-10-10
gutcheck GITHUB 13 2026-09-26
knowforge-metrics-rag GITHUB 12 2026-09-10
Keenable HN 12 2026-08-25
bce-tool-rs GITHUB 11 2026-09-10
jevql GITHUB 11 2026-09-18
OpenOnxy GITHUB 10 2026-10-03
Faster, cheaper Claude Code with local semantic code search via sqlite HN 10 2026-03-11
Click - Research services inside Codex & Claude YC 10 2026-08-12
Recall_RAG GITHUB 9 2026-09-25
Open-source semantic search over your local notes via CLI HN 9 2026-02-03
The TypeScript Semantic Layer for ClickHouse HN 8 2026-06-27
jev-graph-search GITHUB 8 2026-09-21
Save Claude tokens with semantic search powered by SQLite and Ollama HN 8 2026-03-18