Answers only from sources
We are not building an oracle. We are building a library in which every answer has a reference — and when there is no answer, it says so plainly.
About us
We build tools that respect what companies know
Czytelnia is developed by Marciniak IT — a Polish engineering team that believes AI in a company should cite its sources, not replace them with guesswork.
We started from a problem we know from our own projects: a company's knowledge lives in files — contracts, offers, reports, procedures and mailboxes. A keyword search does not understand the question “what notice period do we have with this supplier?”, and going through dozens of PDFs by hand takes hours and still misses things.
That is why we built Czytelnia: a private library in which a question asked in plain language finds the right passages in the documents, and the answer is written only from those passages — with a reference to the document and the page. It is the technique called RAG (retrieval-augmented generation), made usable by the whole company, not just the IT department.
Privacy first
Your documents remain yours: isolation per company, accounts by invitation only, and an operator with no view of the content.
Engineering craft
Full test coverage of the back end, a security review with every change, and technical decisions recorded together with their reasons.
How the product grew
From a prototype to a platform for teams
- The foundation: questions and answers with sources A RAG engine with citations and previews of document pages.
- Mobile app and API keys Questions from the phone and secure integrations with other systems.
- Office formats and mail import Word, Excel, PowerPoint, Markdown, CSV and searchable correspondence from any mailbox with IMAP access.
- MCP server Czytelnia as a tool for AI agents — Claude and ChatGPT ask your library and, if you allow it, add files to it and start workflows.
- Roles, companies and shared collections Customer and team member, assignments per person, ownership always on the company's side.
- Operator panel and team billing Setting up customers, a credit wallet and usage broken down per team member.
- Document versions A new version does not overwrite the old one — you check the differences with an ordinary question and restore an earlier version.
- OCR for scans and photos Documents without a text layer — scans and photographs — become part of the searchable library.
Under the bonnet. Answers are written by an enterprise-grade large language model, the meaning of the text is captured by specialised embedding models, and the data and vectors live in a single database optimised for semantic search. Every provider sits behind an interchangeable interface — with no lock-in to a single vendor.
Company details. Marciniak IT Paweł Marciniak, ul. Karpia 23G lok. 4, 61-619 Poznań, Poland. NIP (Polish tax ID) 7811949227, REGON (Polish business register number) 367646433. How we process data is described in our privacy policy.