RAG

Yuxi

RAG · Multi-model

6.8

Open-source AI agent platform that fuses agentic RAG with knowledge graphs on a LangGraph runtime.

Cosmos

RAG

6.6

AI-powered archive search and reel curation for video production companies.

AI Anime Finder

RAG

Vibe-based semantic search over the AniList catalogue with watch-time and shareable taste cards.

Application Signal

RAG

Evidence-led YC positioning analysis for founders

ClickHouse

RAG

The open-source columnar database powering real-time analytics — and, increasingly, LLM observability and RAG backends.

Docling

RAG · GraniteDocling 258M and other vision-language models

Open-source document parsing for AI: PDFs, Office files, audio and video into clean, structured Markdown/JSON

Findborg

RAG

A Find Engine built on truth — web + community + AI

Meilisearch

RAG · Retrieval engine (Rust); pluggable embedders including OpenAI, Cohere, Hugging Face, Ollama and custom REST models

Open-source, lightning-fast search engine with built-in hybrid and vector search for RAG

Neuron by Momenta Analytics

RAG

Turns SQL query history into an AI-ready semantic layer

Nomic Atlas

RAG · nomic-embed-text-v1.5, nomic-embed-vision-v1.5 (in-house open-weights); optional integrations with OpenAI, Cohere, and other embedding providers

Interactive maps and embeddings for unstructured text, image, and multimodal data.

Notebooker

RAG · User-selectable: OpenAI, Anthropic, or local models (bring your own API key)

A cited-answers notebook that turns links, PDFs, audio and video into podcasts, flashcards, mindmaps and textbooks.

Onyx

RAG · LLM-agnostic — routes to OpenAI (GPT-4o/GPT-5), Anthropic Claude, Google Gemini, Azure OpenAI, AWS Bedrock, or local Ollama/vLLM models

Open-source AI chat connected to your docs, apps, and people

Reducto

RAG · In-house vision models combined with frontier LLMs (specific vendors undisclosed)

Enterprise-grade document parsing and extraction with citation-grounded structured output

Setoku

RAG · Model-agnostic (MCP); commonly paired with Claude / Claude Code

Open-source MCP knowledge server that makes any AI fluent in your company data

Supabase

RAG

Open-source Firebase alternative built on Postgres with a first-class pgvector AI toolkit.

Tavily

RAG · GPT-4

One secure API for real-time web access for AI agents

TiDB

RAG

AI-native distributed SQL database with built-in vector search, agent memory, and RAG pipelines

TokenPath

RAG · model-agnostic (works with any LLM output; uses in-house attribution model)

Token-level citation and attribution API for AI-generated answers

TuneAI

RAG · YandexGPT (feedback), Yandex SpeechKit (speech-to-text)

Voice-based oral exam practice with rubric-grounded AI feedback

Turbopuffer

RAG · bring-your-own embeddings (any provider)

Fast search on object storage

Unstructured.io

RAG · In-house layout and table models plus optional OpenAI / Anthropic / Bedrock embeddings and enrichment

Turn unstructured enterprise documents into LLM-ready data

Vectara

RAG · In-house Boomerang (retrieval) and Mockingbird (generation) plus BYOM for GPT, Claude, Gemini, and open-weight LLMs

Enterprise agent platform with built-in retrieval, grounding, and hallucination controls

Voyage AI

RAG · in-house (voyage-3.5, voyage-4 series, voyage-code-3, voyage-finance-2, voyage-law-2, voyage-multimodal-3.5, voyage-context-3, rerank-2.5)

State-of-the-art embedding models and rerankers purpose-built for retrieval and RAG.