Free Onyx Alternatives in 2026
Looking for free alternatives to Onyx? We've gathered 8 similar AI tools, including 3 with free or freemium plans, so you can compare no-cost options and find the right fit. Top free picks include Chunkr, Elser.ai, ResearchRabbit.
Best Free Onyx Alternatives
- Chunkr (Freemium) (Free option) More Onyx alternatives
- Elser.ai (Freemium) (Free option) — AI-powered semantic search and knowledge retrieval for enterprises More Onyx alternatives
- ResearchRabbit (Free) (Free option) — AI research discovery tool that maps academic papers and connections. More Onyx alternatives
- Kira Systems (Paid) — AI contract analysis and due diligence tool for legal professionals. More Onyx alternatives
- Kapa (Pricing varies) — Give AI agents answers from your company's knowledge. More Onyx alternatives
- DataLab (Pricing varies) — Convert unstructured documents into data for AI workflows. More Onyx alternatives
- Harvey AI (Paid) — Harvey is an AI platform purpose-built for lawyers. It assists with legal research, contract drafting, due diligence, litigation analysis, and regulatory work — trained on legal data with strict client confidentiality. More Onyx alternatives
- Infobox (Freemium) — Infobox is an AI-powered knowledge base tool that lets teams create, organize and instantly query their documentation, making company knowledge instantly accessible. More Onyx alternatives