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Awesome Free / Open Source Alternatives (to common SaaS products) for Business Use

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Curated Resources
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CollaborationBusinessWebPlatforms services and devopsSoftware developmentOther lists of free / open source softwareOther lists

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What's inside

Web

  • 11tyStatic website generator

    A simpler site generator. Transforms a directory of templates (of varying types) into HTML. [JS, MIT License].

  • A List of Static Site Generators for Jamstack SitesStatic website generator

  • Awesome Static Web Site GeneratorsStatic website generator

    A curated list of static web site generators. [Creative Commons Zero v1.0 Universal].

  • btwBlogging platform/ Personal website builder (Medium alternatives)

    Open source Medium alternative- set up your personal blog in minutes. [JS, GNU General Public License v3.0].

  • ExperimentFlowA/B Testing & Personalization (Google Optimize, Optimizely alternatives)

    A/B testing and AI personalisation platform for optimizing web experiences and conversion rates.

  • GhostWeb CMS and Blog Engines

    Independent technology for modern publishing, memberships, subscriptions and newsletters. [JS, MIT License].

Platforms services and devops

  • Abilian Hop3Platform as a Service / PaaS (Heroku, Fly, Render... alternatives):

    Hop3 - Open source platform as a service: deploy and manage your applications seamlessly. [🐍, Other license].

  • Abilian NuaPlatform as a Service / PaaS (Heroku, Fly, Render... alternatives):

    Open source PaaS and application marketplace. [🐍, GNU Affero General Public License v3.0].

  • ApprisePush notifications (OneSignal alternatives)

    Apprise - Push Notifications that work with just about every platform!. [🐍, BSD 2-Clause "Simplified" License].

  • AppwriteBackend-as-a-Service (Firebase alternatives)

    Build like a team of hundreds_. [TS, BSD 3-Clause "New" or "Revised" License].

  • AuthgearUser authentication (Auth0 alternatives)

    Authgear is an open-source Auth0/Clerk alternative for all of your consumer authentication needs. Get started in 5 minutes to integrate passwordless login, passkeys, 2FA, and enterprise-grade security into your applications. It supports modern authentication protocols OIDC and SAML. It features a web portal for user management and setting up authentication/authorization configurations. [☕️, Apache License 2.0]

  • CapRoverPlatform as a Service / PaaS (Heroku, Fly, Render... alternatives):

    Scalable PaaS (automated Docker+nginx) - aka Heroku on Steroids. [TS, Other license].

Collaboration

  • AFFiNEKnowledge Bases (Notion alternatives)

    There can be more than Notion and Miro. AFFiNE(pronounced [ə‘fain]) is a next-gen knowledge base that brings planning, sorting and creating all together. Privacy first, open-source, customizable and ready to use. [TS, Other license].

  • AppFlowyKnowledge Bases (Notion alternatives)

    Bring projects, wikis, and teams together with AI. AppFlowy is the AI collaborative workspace where you achieve more without losing control of your data. The leading open source Notion alternative. [Dart, GNU Affero General Public License v3.0].

  • Aster MailEmail (Gmail / Proton Mail alternatives)

    "Quantum-safe end-to-end encrypted email. Alternative to Gmail, Proton Mail." [AGPL-3.0]

  • BigBlueButtonVideo Conferencing (Zoom, Webex, Google Meet, Skype... alternatives)

    Complete open source web conferencing system. [JS, GNU Lesser General Public License v3.0].

  • BookStackKnowledge Bases (Notion alternatives)

    A platform to create documentation/wiki content built with PHP & Laravel. [PHP, MIT License].

  • ElementChat & Team Communication (Slack, Discord alternatives)

    A glossy Matrix collaboration client for the web. [TS, GNU Affero General Public License v3.0].

Other lists of free / open source software

  • AFS ONE

    Free Software Publisher Directory.

  • Awesome F/OSS

    "Explore the universe of awesome Free and Open Source software."

  • Awesome Free Software

    Your "yellow pages" of Enterprise Free Software Publishers, their products and success cases. [Unknown license].

  • Awesome Free Software

    Curated list of free as in freedom software. [Creative Commons Zero v1.0 Universal].

  • Awesome open-source alternatives to SaaS

    Awesome list of open-source startup alternatives to well-known SaaS products 🚀. [🐍, MIT License].

  • Awesome-Selfhosted

    A list of Free Software network services and web applications which can be hosted on your own servers. [Other license].

Business

  • AlfrescoDocument Management / ECM (Documentum alternatives)

    Alfresco Content Application. [TS, GNU Lesser General Public License v3.0].

  • CraterInvoicing (FreshBooks / QuickBooks alternatives)

    Open Source Invoicing Solution for Individuals & Businesses. [PHP, GNU Affero General Public License v3.0].

  • CustomermatesCRM (Salesforce alternatives)

    Open-source CRM with native n8n workflow automation, built for small B2B teams. Alternative to Pipedrive/HubSpot. [TS, GNU Affero General Public License v3.0].

  • DolibarrERP (SAP Alternatives)

    ERP, CRM, POS, RH

  • ERP5ERP (SAP Alternatives)

    ERP5 Open Source ERP/CRM/KM. (Mirror of

  • EspoCRMCRM (Salesforce alternatives)

    EspoCRM – Open Source CRM Application. [PHP, GNU Affero General Public License v3.0].

Software development

  • BugzillaBug tracking (Jira alternatives):

    Official repository for the Bugzilla bug tracking system. Report bugs to

  • BuildbotContinuous integration (CircleCI alternatives)

    Python-based continuous integration testing framework; your pull requests are more than welcome!. [🐍, GNU General Public License v2.0].

  • DroneContinuous integration (CircleCI alternatives)

    Harness Open Source is an end-to-end developer platform with Source Control Management, CI/CD Pipelines, Hosted Developer Environments, and Artifact Registries. [Go, Apache License 2.0].

  • ForgejoCode hosting & collaboration (Github alternatives)

    Forgejo is a self-hosted lightweight software forge maintained by an inclusive community under the umbrella of Codeberg e.V., a registered non-profit association based in Berlin, Germany. [Go, GNU General Public License v3.0].

  • GerritCode review (Github alternatives)

    Gerrit Code Review - (mirror of

  • GiteaCode hosting & collaboration (Github alternatives)

    Git with a cup of tea! Painless self-hosted all-in-one software development service, including Git hosting, code review, team collaboration, package registry and CI/CD. [Go, MIT License].

Other lists

  • IndieStack

    Directory of indie-built SaaS alternatives across 100+ categories.

Showing a sample of 130 resources. View the full list on GitHub →