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5 jobs · 16 apps

Best open source software for nonprofits

For a nonprofit, a self-hosted stack starts with admidio for member management, Pretix for events and WordPress for the website and newsletter.

Nonprofits often run on tight budgets and volunteers. These apps cover member management, events, a website and newsletter, collaboration and bookkeeping, with no per-seat fees.

Updated · data from GitHub, refreshed daily

Top picks

  1. Rank 1:

    admidio

    Admidio/admidio

    User management system for websites of organizations and groups. The system has a flexible role model so that it’s possible to reflect the structure and permissions of your organization.

    Active · last commit Oct 28, 2026

    HR & Time TrackingPHPDocker

    Stands out for a published Docker image. admidio has 485 GitHub stars, uses the GPL-2.0 license, ships a Docker image and had 1,570 commits in the last year.

  2. Rank 2:

    Galette

    galette/galette

    Membership management web application aimed towards non profit organizations.

    Active · last commit Oct 27, 2026

    Finance & BudgetingPHP

    Stands out for the longest track record (since 2013). Galette has 73 GitHub stars, uses the GPL-3.0 license and had 972 commits in the last year.

  3. Rank 3:

    hitobito

    hitobito/hitobito

    Manage complex group hierarchies with members, events and a lot more.

    Active · last commit Oct 28, 2026

    Polls, Surveys & EventsRuby

    Stands out for its Ruby codebase. hitobito has 484 GitHub stars, uses the AGPL-3.0 license and had 1,422 commits in the last year.

At a glance

Open source software for nonprofits compared

Picked by hand for each job from apps whose own description or topics match it, in curated order inside each section, with GitHub data from October 2026; an app appears only once.

Top 10 picks compared, data as of Oct 28, 2026
AppStands out forLicenseGitHub starsCommits (12 mo)Last commitDocker image
admidioa published Docker imageGPL-2.04851,570Oct 28, 2026Yes
Galettethe longest track record (since 2013)GPL-3.073972Oct 27, 2026No
hitobitoits Ruby codebaseAGPL-3.04841,422Oct 28, 2026No
Pretixthe most commits in the last 12 months (1,578)AGPL-3.02,5521,578Oct 28, 2026Yes
Hi.Eventsthe most GitHub starsAGPL-3.0 with branding terms (Section 7)4,086346Oct 27, 2026Yes
gathio–GPL-3.0467104Sep 30, 2026Yes
WordPress–GPL-2.021,5092,760Oct 28, 2026No
Ghost–MIT55,6266,762Oct 28, 2026No
Listmonk–AGPL-3.024,011463Oct 28, 2026Yes
Nextcloud–AGPL-3.037,3218,046Oct 28, 2026No

1 of 5 · 3 picks

Members and groups

  1. 1

    admidio

    User management system for websites of organizations and groups. The system has a flexible role model so that it’s possible to reflect the structure and permissions of your organization.

    Stands out for a published Docker image. admidio has 485 GitHub stars, uses the GPL-2.0 license, ships a Docker image and had 1,570 commits in the last year.

  2. 2

    Galette

    Membership management web application aimed towards non profit organizations.

    Stands out for the longest track record (since 2013). Galette has 73 GitHub stars, uses the GPL-3.0 license and had 972 commits in the last year.

  3. 3

    hitobito

    Manage complex group hierarchies with members, events and a lot more.

    Stands out for its Ruby codebase. hitobito has 484 GitHub stars, uses the AGPL-3.0 license and had 1,422 commits in the last year.

2 of 5 · 3 picks

Events and tickets

  1. 1

    Pretix

    Ticket sales platform for events.

    Stands out for the most commits in the last 12 months (1,578). Pretix has 2,552 GitHub stars, uses the AGPL-3.0 license, ships a Docker image and had 1,578 commits in the last year.

  2. 2

    Hi.Events

    Event management and ticketing platform for conferences, concerts, and more. Offering customizable event pages and embeddable ticket widgets.

    Stands out for the most GitHub stars. Hi.Events has 4,086 GitHub stars, uses the AGPL-3.0 with branding terms (Section 7) license, ships a Docker image and had 346 commits in the last year.

  3. 3

    gathio

    Self-destructing, shareable, no-registration event pages.

    gathio has 467 GitHub stars, uses the GPL-3.0 license, ships a Docker image and had 104 commits in the last year.

3 of 5 · 3 picks

Website and newsletter

  1. 1

    WordPress

    World's most-used blogging and CMS engine.

    WordPress has 21,509 GitHub stars, uses the GPL-2.0 license and had 2,760 commits in the last year; it replaces WordPress.com and Webflow.

  2. 2

    Ghost

    Just a blogging platform.

    Ghost has 55,626 GitHub stars, uses the MIT license and had 6,762 commits in the last year; it replaces Medium.

  3. 3

    Listmonk

    High performance, self-hosted newsletter and mailing list manager with a modern dashboard.

    Listmonk has 24,011 GitHub stars, uses the AGPL-3.0 license, ships a Docker image and had 463 commits in the last year; it replaces Mailchimp and Substack.

4 of 5 · 4 picks

Collaboration and decisions

  1. 1

    Nextcloud

    Access and share your files, calendars, contacts, mail and more from any device, on your terms.

    Nextcloud has 37,321 GitHub stars, uses the AGPL-3.0 license and had 8,046 commits in the last year; it replaces Google Drive and Dropbox.

  2. 2

    Mattermost

    Platform for secure collaboration across the entire software development lifecycle, can be integrated with Gitlab (alternative to Slack).

    Mattermost has 39,455 GitHub stars, uses the AGPL-3.0 license, ships a Docker image and had 2,155 commits in the last year; it replaces Slack.

  3. 3

    Discourse

    Advanced forum / community solution based on Ruby and JS.

    Discourse has 48,023 GitHub stars, uses the GPL-2.0 license, ships a Docker image and had 7,492 commits in the last year; it replaces Reddit.

  4. 4

    Loomio

    Collaborative decision-making tool that makes it easy for anyone to participate in decisions which affect them.

    Loomio has 2,622 GitHub stars, uses the AGPL-3.0 license, ships a Docker image and had 3,117 commits in the last year.

5 of 5 · 3 picks

Bookkeeping

  1. 1

    Bigcapital

    Financial accounting and inventory management software for small to medium businesses.

    Bigcapital has 3,970 GitHub stars, uses the AGPL-3.0 license, ships a Docker image and had 1,135 commits in the last year; it replaces QuickBooks and Xero.

  2. 2

    hledger

    Plain text double-entry accounting with command-line, terminal and web interfaces, multi-currency support and CSV import.

    hledger has 4,798 GitHub stars, uses the GPL-3.0 license, ships a Docker image and had 2,368 commits in the last year.

  3. 3

    Akaunting

    Accounting software designed for small businesses and freelancers.

    Akaunting has 10,239 GitHub stars, is source-available under the BSL 1.1 (not an open-source license) and had 595 commits in the last year; it replaces QuickBooks and Xero.

FAQ

Questions and answers

Still curious? Email info@appsgit.com.

Is there an open source donor management system?

Not in this catalog. Galette describes itself as membership management for non-profit organizations and Admidio as user management for organizations and groups; a general CRM can track donors.

Is admidio free?

Yes. admidio is open-source software released under the GPL-2.0 license, so you can self-host it at no cost. You only pay for the server it runs on, and some projects also offer an optional paid cloud plan.

Can I run this stack with Docker?

10 of the 16 apps here publish Docker images, including admidio, Pretix and Hi.Events, so most of the stack can run side by side with Docker Compose on one server. Size the server for the heaviest app and add off-site backups.

How is this list ranked?

Picked by hand for each job from apps whose own description or topics match it, in curated order inside each section, with GitHub data from October 2026; an app appears only once.

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