1. OpenAlternative

Discover Open Source Alternatives to Popular Software

We’ve curated some great open source alternatives to tools that your business requires in day-to-day operations.

Favicon of Strapi website

Strapi

The next-gen headless CMS, open-source, javascript, enabling content-rich experiences to be created, managed and exposed to any digital device.

  • Stars

    61,233
  • Forks

    7,635
  • Last commit

    22 hours ago
Favicon of PostHog website

PostHog

PostHog provides open-source product analytics, session recording, feature flagging and A/B testing that you can self-host.

  • Stars

    18,941
  • Forks

    1,108
  • Last commit

    12 hours ago

Preline UI

Open-source set of prebuilt UI components based on the utility-first Tailwind CSS framework.

Visit Preline UI
Favicon of Cal.com website

Cal.com

Scheduling infrastructure for absolutely everyone.

  • Stars

    29,381
  • Forks

    6,810
  • Last commit

    20 hours ago
Favicon of Supabase website

Supabase

An open source Firebase alternative. Start your project with a Postgres database, Authentication, instant APIs, Edge Functions, Realtime subscriptions, Storage, and Vector embeddings.

  • Stars

    67,611
  • Forks

    6,383
  • Last commit

    11 hours ago
Favicon of InboxZero website

InboxZero

Open source email app to reach inbox zero fast.

  • Stars

    2,049
  • Forks

    168
  • Last commit

    1 week ago
Favicon of Rustdesk website

Rustdesk

An open-source remote desktop, and alternative to TeamViewer.

  • Stars

    65,913
  • Forks

    7,234
  • Last commit

    18 hours ago
Favicon of Ghost website

Ghost

Independent technology for modern publishing, memberships, subscriptions and newsletters.

  • Stars

    46,070
  • Forks

    10,060
  • Last commit

    11 hours ago
Favicon of NetData website

NetData

The open-source observability platform everyone needs!

  • Stars

    68,762
  • Forks

    5,766
  • Last commit

    19 hours ago
Favicon of Rocket.Chat website

Rocket.Chat

The communications platform that puts data protection first.

  • Stars

    39,165
  • Forks

    10,025
  • Last commit

    1 day ago
Favicon of Discourse website

Discourse

A platform for community discussion. Free, open, simple.

  • Stars

    40,917
  • Forks

    8,183
  • Last commit

    12 hours ago
Favicon of AppFlowy website

AppFlowy

AppFlowy is an open-source alternative to Notion. You are in charge of your data and customizations. Built with Flutter and Rust.

  • Stars

    49,853
  • Forks

    3,274
  • Last commit

    11 hours ago
Favicon of Gitea website

Gitea

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

  • Stars

    42,692
  • Forks

    5,276
  • Last commit

    12 hours ago
Favicon of Joplin website

Joplin

Joplin - the secure note taking and to-do app with synchronisation capabilities for Windows, macOS, Linux, Android and iOS.

  • Stars

    43,838
  • Forks

    4,723
  • Last commit

    14 hours ago
Favicon of Flowise AI website

Flowise AI

Build LLM Apps Easily. Open source low-code tool for developers to build customized LLM orchestration flow & AI agents.

  • Stars

    26,500
  • Forks

    13,555
  • Last commit

    14 hours ago
Favicon of N8N website

N8N

Free and source-available fair-code licensed workflow automation tool. Easily automate tasks across different services.

  • Stars

    41,859
  • Forks

    5,333
  • Last commit

    21 hours ago
Favicon of Plausible website

Plausible

Simple, open source, lightweight (< 1 KB) and privacy-friendly web analytics alternative to Google Analytics.

  • Stars

    18,790
  • Forks

    1,007
  • Last commit

    1 day ago
Favicon of ClickHouse website

ClickHouse

A fast open-source column-oriented database management system that allows generating analytical data reports in real-time using SQL queries.

  • Stars

    35,034
  • Forks

    6,570
  • Last commit

    13 hours ago
Favicon of TiDB website

TiDB

TiDB is an open-source, cloud-native, distributed, MySQL-Compatible database for elastic scale and real-time analytics.

  • Stars

    36,375
  • Forks

    5,726
  • Last commit

    23 hours ago
Favicon of AppWrite website

AppWrite

Build like a team of hundreds_

  • Stars

    41,814
  • Forks

    3,771
  • Last commit

    1 day ago
Favicon of Hoppscotch website

Hoppscotch

Open source API development ecosystem

  • Stars

    60,962
  • Forks

    4,235
  • Last commit

    1 month ago

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