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167 projects, sorted by GitHub stars.

languagetool

Alternative toGrammarly

Self-hosted grammar and style checker for 30+ languages

  • 15,248 GitHub stars
  • LGPL-2.1Licence LGPL-2.1

LiveKit

Alternative toTwilio

Real-time voice and video infrastructure on open source WebRTC

  • 15,164 GitHub stars
  • Apache-2.0Licence Apache-2.0
  • #AI Agents

stremio-web

Alternative toPlex

Open source web UI for media streaming, powered by community addons.

  • 15,035 GitHub stars
  • GPL-2.0Licence GPL-2.0
  • #Video

Notesnook

Alternative toEvernote

End-to-end encrypted open source note-taking, cross-platform

  • 14,913 GitHub stars
  • GPL-3.0Licence GPL-3.0

Mailcow Dockerized

Alternative toGoogle Workspace

Self-hosted email server with Docker Compose and a web admin UI.

  • 13,779 GitHub stars
  • GPL-3.0Licence GPL-3.0
  • #Email

supertonic

Alternative toElevenLabs

Instantly convert text to speech with customizable options

  • 13,772 GitHub stars
  • MITLicence MIT

Element

Alternative toSlack

Secure team chat built on the Matrix open protocol

  • 13,651 GitHub stars
  • AGPL-3.0Licence AGPL-3.0
  • #Chat

Tinode

Alternative toSendbird Chat

Self-hosted instant messaging platform for web and mobile apps

  • 13,565 GitHub stars
  • GPL-3.0Licence GPL-3.0
  • #Chat

FluidVoice

Alternative toWispr Flow

Voice-to-text for macOS with on-device AI and zero cloud dependency

  • 12,962 GitHub stars
  • GPL-3.0Licence GPL-3.0

OpenBot

Alternative toGrok Bot

AI coworkers you can trust with real work

  • 11,400 GitHub stars
  • MITLicence MIT
  • #AI Agents

OpenWhispr

Alternative toWispr Flow

Local-first voice dictation with Whisper, offline mode, and AI cleanup

  • 11,230 GitHub stars
  • MITLicence MIT
  • #AI Agents

Mautic

Alternative toHubSpot Marketing Hub

Self-hosted marketing automation with email and campaigns

  • 10,963 GitHub stars
  • GPL-3.0Licence GPL-3.0
  • #Email
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