Alternatives to Corpusos

Open-source vector similarity search for Postgres — store embeddings with your relational data, no extra database.

Open-source knowledge-graph RAG that maps entities and communities to answer complex, cross-document questions.

Open-source vector database for billion-scale AI similarity search.

Open-source AI search platform unifying vector, text, and ML ranking for scalable applications.

Open-source, serverless vector search built on object storage that claims up to 10x lower cost.

Open-source distributed SQL database with vector search, ACID transactions, and HTAP for AI agent workloads.

Open-source real-time SQL analytics, full-text search, and vector database for AI.

Open-source agent platform fusing knowledge graphs with RAG for explainable enterprise AI

Free open-source admin UI for ChromaDB vector database

Open-source, cloud-native data warehouse in Rust unifying analytics, vector search, and full-text search on object storage.

Zvec: open-source, in-process vector database with sub-millisecond search at billion scale.

Open-source PDF-to-vector pipeline for RAG in one command.

Open-source agentic AI data assistant for SQL, code, and reports

Open-source platform for building, hosting, and running language agents in the wild

Open source platform to debug, evaluate, monitor, and optimize AI agents and ML models.

Open-source RAG engine with advanced ETL, hybrid search, and visual agent orchestration for enterprise AI.

Open-source workspace to build, evaluate, and deploy AI agents through chat

Free, open-source AI observability and evals for debugging agents

Open-source multimodal lakehouse for AI data curation, feature engineering, search, and training.

Open-source Python SDK and self-hosted runtime for building, running, and managing production agent platforms.

Microsoft's open-source, code-first agent framework for stateful, data-intensive conversational tasks.

Open-source lakehouse format for multimodal AI with hybrid search.

Open-source context intelligence & persistent memory layer for LLM agents with ~12ms deterministic dedup.

Open-source CLI that turns 18 source types into AI skills and RAG knowledge for 22 AI platforms.

Open-source content intelligence engine for CPU-only document extraction

Open-source Python framework turning messy text into typed, queryable Semantic DataFrames

Free open-source Python framework for LLM document extraction

Free, open-source Python NLP library for tokenization, POS tagging, parsing, and 50+ corpora—built for learning and teaching.

Open-source incremental data framework for AI agents, processing only deltas for always-fresh context.

Open-source Django library for adding AI assistants, chatbots, and RAG to your projects.