Postiz

Postiz is an open-source, AI-powered social media scheduler. Write once and publish to 30+ networks (X, LinkedIn, Instagram, TikTok, YouTube, Threads, Bluesky, Reddit and more) from one visual calendar. The built-in AI agent drafts posts, writes captions and hashtags, designs images and generates videos, and Postiz works with Claude, ChatGPT and other agents via MCP, CLI, API, n8n and Make. Teams collaborate with approvals and analytics. Open source (AGPL-3.0, ~36k GitHub stars): self-host free, or Postiz Cloud from $29/month with a 7-day free trial.