Self-host it, or let us keep it for you

Lexarii comes in two forms, and we would like you to pick the one that suits you, even if that is the free one.

The community edition: free, and yours

Lexarii is free software, licensed under the GNU Affero General Public License, version 3 or later. The source code is public, and anyone may run it, study it, change it and share it. It has no telemetry and phones nobody home.

You get the whole thing: the library that catalogues itself, the reader with highlights and notes, the OPDS catalogue for your e-reader, and the research assistant that answers questions with citations into your books.

What it asks of you:

• A server. Anything that runs Docker will do, from a spare computer to a small cloud machine. Lexarii is a single Go binary plus Postgres with the pgvector extension, and docker compose --profile full up -d starts both, once .env has a POSTGRES_PASSWORD.
• A model, if you want the assistant. Any OpenAI-compatible endpoint works: llama.cpp, Ollama, vLLM, LM Studio, or a hosted API you choose. The model is optional. Without one, the library and the reader work completely, and only the questions and the automatic descriptions wait.
• Your time. Updates, backups and disks are yours to look after.

In return, nothing leaves your house that you did not send, and your books can stay in a read-only folder that Lexarii never writes to.

The hosted edition: we keep it for you

At lexarii.com we run Lexarii for you, for €14.99 a month, including any tax. One plan, with no cap on books or questions, billed monthly, and you can cancel any time.

What you are paying for:

• Nothing to run. No server, no updates, no database to tend. Sign up, upload, read.
• The model is included. Questions are answered by a capable model we pay for, so there is no API key to manage and no hardware to buy.
• Care. Your library lives on servers in the EU. Your account and notes are backed up continuously, and your books are kept as three copies on separate servers.

What it costs you, besides the money: some trust. Your files are on our servers rather than yours, and when you ask a question, the question, the relevant passages, a few of your relevant notes and the conversation so far go to an AI model provider in the United States (and a sample of each book you add, to describe it). We ask the provider not to store or train on any of it, but that is a request we make, not a guarantee we can give. We think that is a fair trade for many people, and the wrong one for some. The privacy notice has the details.

How to choose

If you already run a home server, or want the assistant to run on your own hardware, self-host. You lose nothing by it; it is the same software.

If you want your library to simply be there, on your laptop, your phone and your e-reader, without becoming its system administrator, let us keep it.

Either way, the subscription pays for Lexarii’s development, and improvements to the library, the reader and the assistant land in the free edition first. Today the hosted edition adds what it takes to run Lexarii for the public: accounts and billing, backups, the model, fair-use limits, and the moderation a public service owes under the EU Digital Services Act. One difference: on lexarii.com a book’s shared catalogue details, its cover and merging duplicates are edited by us, not by each reader.

You can change your mind in both directions: a subscription can be cancelled any time, and while you subscribe, and for 30 days after, everything is yours to download in one file and take to a server of your own.