Every open-source document management project we track, scored on maintenance, momentum and licence — so you can tell the live competitors from the abandoned repositories.
Document Management has 41 open-source implementations in this dataset, of which 22 show real momentum and 1 are dormant or abandoned. The leader is Stirling-PDF with 90k stars against a category median of 1.0k — roughly 86x the typical project. Saturation score 72/100: Crowded. Free, maintained alternatives already dominate this category.
Assume every prospect can find a free version in five minutes. Your wedge has to be something open source structurally cannot deliver: compliance, support SLAs, managed hosting at scale, or a workflow the maintainers refuse to build.
The practical test in this category: Stirling-PDF is the reference implementation at 90k stars, and 22 of 41 projects are still shipping. A buyer evaluating you will find at least one maintained free option, so your pricing and positioning have to answer "why not self-host Stirling-PDF?" in the first minute.
Document Management
Local hosted web application that allows you to perform various operations on PDF files, such as merging, splitting, file conversions and OCR.
Document Management
Scan, index, and archive all of your paper documents with an improved interface (fork of Paperless).
Document Management
E-book library manager that can view, convert, and catalog e-books in most of the major e-book formats and provides a built-in Web server for remote clients.
Alternative to DocuSign
Create, fill, and sign digital documents (alternative to DocuSign).
Document Management
Browse, read and download eBooks using an existing Calibre database.
Document Management
Powerful, privacy-first, client-side PDF toolkit that allows you to manipulate, edit, merge, and process PDF files directly in your browser.
Alternative to DocuSign, Document signing
Digital document signing platform (alternative to DocuSign).
Document Management
Developer-friendly API to interact with powerful tools like Chromium and LibreOffice for converting numerous document formats (HTML, Markdown, Word, Excel, etc.) into PDF files, and more.
Document Management
Cross-platform e-book/manga/comic/pdf server and web reader with user management, ratings and reviews, and metadata support.
Document Management
Document signing software (alternative to DocuSign).
Document Management
Media server for comics/mangas/BDs with API and OPDS support, a modern web interface for exploring your libraries, as well as a web reader.
Document Management
All-in-one solution, combining the modern lightweight web UI from Calibre-Web with the robust, versatile feature set of Calibre (fork of Calibre Web).
Document Management
Minimalist document storage, management and archiving platform designed to be simple to use and accessible to everyone.
Document Management
Social network for tracking your reading, talking about books, writing reviews, and discovering what to read next.
Document Management
A fast, free and open source comics, manga and digital book server with OPDS support.
Document Management
Auto-tagging document organizer and archive.
Document Management
PDF manager, viewer and editor offering a seamless user experience on multiple devices. It's designed to be minimal, fast, and easy to set up using Docker.
Document Management
Turnkey repository application providing durable access to digital resources.
Document Management
Build and manage a comic book library. Download, rename, move and convert issues of the volume to your liking.
Document Management
HTTP daemon for serving wikis from ZIM files.
Document Management
Sign and manipulate PDFs with collaboration, organization, compression and metadata editing.
Document Management
Electronic document management system for your documents with preview generation, OCR, and automatic categorization among other features.
Document Management
Manage your personal book library with ease.
Document Management
Enterprise-class ILS with modules for acquisitions, circulation, cataloging, label printing, offline circulation for when Internet access is not available, and much more.
Document Management
Document management system focused on scanned documents (electronic archives). Features file browsing in similar way to dropbox/google drive. OCR, full text search, text overlay/selection.
Document Management
Simple Document Management System for private use with basic functionality to organize your documents digitally.
Document Management
Organize PDF papers and office documents. It provides a lot of extra features for students and research groups both in industry and academia.
Document Management
Robust and modular repository system for the management and dissemination of digital content especially suited for digital libraries and archives, both for access and preservation.
Document Management
Front-end for the Samvera framework, which itself is a Ruby on Rails application for browsing and managing Fedora-based digital repositories.
Document Management
Manga/comic/light novel media server with clients for Windows, Linux, macOS and Android.
Document Management
Highly scalable turn-key research data management platform with a beautiful user experience.
Document Management
Easy-to-use, metadata-driven, open-source document management system (DMS) for small businesses that sorts documents almost by itself.
Document Management
Drupal module for browsing and managing Fedora-based digital repositories.
Document Management
Highly-scalable software for libraries that helps library patrons find library materials, and helps libraries manage, catalog, and circulate those materials.
Document Management
Large-scale ILS that can be run as a service with consortial features, intended primarily for library networks. Includes most standard modules (circulation, acquisitions, cataloging,...) and a web-bas
Document Management
Folder-watching converter for e-books and comics. EPUB to Kobo KEPUB via kepubify, CBZ/CBR/PDF via Kindle Comic Converter, with per-device profiles, ComicInfo.xml naming, chapter-to-volume bundling an
Document Management
Digital document management system with a flexible metadata and workflow model primarily aimed at academic institutions.
Document Management
Manga collection manager with automatic metadata, MyAnimeList import and detailed collection statistics.
Document Management
Lightweight PDF library and reader.
Document Management
Document Management System with workflows, access rights, fulltext search, and more.
Document Management
Free to use, versatile, lightweight, multi-platform, and secure home server for your comic and e-book library.
100 maintained · leader Mastodon
58 maintained · leader Dify.ai
40 maintained · leader revealjs
36 maintained · leader Jellyfin
28 maintained · leader copyparty
29 maintained · leader Strapi
Existence is not competition. A project competes with you only if it is maintained, findable, deployable by your buyer and licensed for their use. Most projects fail at least one of those tests. Run all four before you shelve an idea — or before you assume you have a clear run.
Stars are a lifetime counter with no decay, so a project abandoned in 2022 still looks like a leader in 2026. In this dataset 149 projects are dormant, abandoned or archived, and several of them sit in the top decile by stars. Sort by momentum and commit activity instead — popularity tells you the project was once interesting, maintenance tells you whether it will still be there when your customer needs a bug fixed.
When a prospect says 'we could just self-host the free one', they are usually comparing your price against zero. The real comparison is your price against hosting, upgrades, backups, security patching, integration work and the engineer hours behind all of it. Quantifying that number is the single most effective response to a free-alternative objection — and it is more persuasive coming with a spreadsheet than with a feature list.
Founders treat licensing as a legal footnote and then discover it dictates strategy. Permissive licences allow closed commercial forks, which is why so many managed services exist around MIT and Apache projects — and also why your differentiation cannot be the code itself. Copyleft licences, especially AGPL, remove the closed-wrapper option entirely, which reduces competition but restricts you too. Source-available licences exist precisely to stop the wrapper business.
Search this database by category and by the commercial product you would replace. It covers 1665 projects across 130 categories, each mapped to the paid tool it substitutes. If your category shows a "Crowded" verdict, a maintained free version almost certainly exists and your positioning has to account for it.
No. It means free is your price anchor. Plenty of large companies were built next to a good open-source project — the ones that failed were the ones selling the same job at a price the free tool made indefensible. Find the part of the job the project deliberately does not do, and sell that.
Each category gets a 0–100 score built from three inputs: how many implementations exist, what share of them are still actively maintained, and how far ahead the leading project is compared with the category median. 62+ is Crowded, 38–61 Contested, under 38 Open. 11 categories are Crowded and 88 are Open.
A project has momentum when it committed code in most of the last twelve months, shipped a release recently and is not archived. 736 of 1665 projects qualify. This is the single most useful filter here — it strips out the popular-but-dead repositories that make a category look more competitive than it is.
It depends entirely on the licence. MIT, Apache and BSD let you build and sell closed products on top. GPL and AGPL require derivative work to stay open, and AGPL extends that to network use, which blocks most SaaS wrappers. BSL, SSPL and Commons Clause are source-available, not open source, and usually restrict competing commercial use outright.
IdeaProof scores your idea against real competitors, market size and 1,000+ documented startup failures in about two minutes.
Validate your idea free