12 vetted picks for open source chat with pdf ai, ranked by the ToolHund Score. Updated for 2026.
EU teams wanting fast, sovereign AI with strong code support.
Teams and creators looking for AI productivity options — see the official site for the current feature set.
Teams and creators looking for AI coding options — see the official site for the current feature set.
Daily research, writing drafts, brainstorming and code help in one chat.
Teams and creators looking for AI chatbots options — see the official site for the current feature set.
Teams and creators looking for AI chatbots options — see the official site for the current feature set.
Teams and creators looking for AI chatbots options — see the official site for the current feature set.
Teams and creators looking for AI chatbots options — see the official site for the current feature set.
Developers and teams that want a self-hostable coding agent with strong control and transparency.
Developers who want an open-source coding agent with flexible model support.
Teams and creators looking for AI chatbots options — see the official site for the current feature set.
Teams and creators looking for AI chatbots options — see the official site for the current feature set.
Our top-ranked pick is at the top of the list above. Rankings use the ToolHund Score — a blend of features, pricing fit, community sentiment and shipping cadence. Vendors can't pay to move up.
Yes — where a free tier exists it's flagged on each tool card. Sort or filter by pricing on the category page to see only free and freemium options.
We re-check every listed tool at least monthly, and immediately when a tool ships a major pricing or feature change.
Sponsored tools are always labelled and never mixed into unpaid rankings. Read the disclosure and methodology pages for details.