License watch

“Open source” is not always one license. These projects use mixed licenses, commercially licensed enterprise files, or source-available terms that are not OSI open source. We read the license files and summarise what it means for you.

- n8nAlternative to Zapier
  A source-available workflow automation tool with a visual editor, code steps and a large integration library.
  Custom licenseSelf-hostedCloud
  207k
  GitHub stars
  Some features paywalled
Sustainable Use License 1.0 (n8n). Source-available under the Sustainable Use License (fair-code), not OSI open source. Free for internal business use; files with .ee. in the name need a paid Enterprise license. Check the license before offering n8n as a hosted service or embedding it in a product.
- AppFlowyAlternative to Notion
  A Notion-style workspace for docs, databases and wikis, with local-first desktop and mobile apps.
  AGPL-3.0Self-hostedCloud
  77k
  GitHub stars
  Free tier is limited
GNU Affero General Public License v3.0. The AppFlowy app repository is AGPL-3.0. The self-hosted server is no longer open source: the AGPL AppFlowy-Cloud repository is archived, and the current self-hosted server (AppFlowy-SelfHost-Commercial) is distributed under a commercial license, with a free tier of one user seat plus up to three guest editors.
- TwentyAlternative to HubSpot
  A modern open-source CRM you can self-host and extend through its API.
  AGPL-3.0Self-hostedCloud
  58k
  GitHub stars
  Some features paywalled
GNU Affero General Public License v3.0. Mostly AGPL-3.0. Files marked '@license Enterprise' are under a commercial license, some packages (CLI, SDK, UI library, apps) are MIT, and an additional permission covers applications built on Twenty's APIs.
- MattermostAlternative to Slack
  A self-hostable team chat platform with channels, threads and integrations, popular for secure and technical teams.
  AGPL-3.0Self-hostedCloud
  39k
  GitHub stars
  Some features paywalled
GNU Affero General Public License v3.0. Compiled binaries from Mattermost Inc. are MIT. Source is available under AGPL-3.0 or a commercial license, admin tools and configuration files are Apache-2.0, and a separate enterprise license covers enterprise features.
- NextcloudAlternative to Dropbox
  A self-hosted file sync and sharing platform with an app store for calendar, contacts, mail and chat.
  AGPL-3.0Self-hosted
  37k
  GitHub stars
  Some features paywalled
GNU Affero General Public License v3.0. The core server is AGPL-3.0. Enterprise subscriptions add vendor support and some features listed on the pricing page.
- Plausible AnalyticsAlternative to Google Analytics
  Lightweight, cookieless, privacy-focused web analytics with a self-hostable Community Edition.
  AGPL-3.0Self-hostedCloud
  29k
  GitHub stars
  Some features paywalled
GNU Affero General Public License v3.0. The self-hosted Community Edition is AGPL-3.0. The paid cloud service includes features that are not in the Community Edition.
- FormbricksAlternative to Typeform
  An open-source survey and feedback tool for in-product and link surveys that you can self-host.
  AGPL-3.0Self-hostedCloud
  13k
  GitHub stars
  Some features paywalled
GNU Affero General Public License v3.0. AGPL-3.0 outside the apps/web/modules/ee directory, which has a separate enterprise license; the JS, Android, iOS and API packages are MIT. Enterprise features (roles, SSO, audit logs, extra workspaces) and keeping a modified fork private need a paid license.

7 projects listed. More are added as they are checked against official sources.