The best open source alternative to Postiz is Mixpost. If that doesn't suit you, we've compiled a ranked list of other open source Postiz alternatives to help you find a suitable replacement. Other interesting open source alternative to Postiz is TryPost.
Postiz alternatives are mainly Social Media Management Tools. Browse these if you want a narrower list of alternatives or looking for a specific functionality of Postiz.
Create, schedule, and manage social media content from your own server with no subscription fees or usage restrictions.

Mixpost is an open-source, self-hosted social media management platform that offers a comprehensive suite of tools for businesses and marketers. Here are the key features and benefits:
One-time Payment: Pay once and use forever, eliminating recurring subscription costs.
Unlimited Usage: No restrictions on posts, accounts, or team members.
Privacy-Focused: Host on your own server for complete data control and security.
Multi-Platform Support: Manage content for Facebook, Instagram, Mastodon, LinkedIn, Pinterest, YouTube, TikTok, X (Twitter), and more from a single dashboard.
Powerful Scheduling: Intuitive calendar interface for effortless content planning and automation.
Analytics: Gain actionable insights on follower activity and post engagement to optimize your strategy.
Media Management: Organize and store your multimedia content in an integrated library.
Customization: Tailor posts for each platform and preview them before publishing.
Video Support: Leverage video content for Facebook Reels, Instagram Reels, YouTube Shorts, and TikTok.
Multilingual: Available in multiple languages with RTL support.
White Label: Rebrand the tool for your agency or clients.
Easy Setup: Quick two-step installation process with Docker support.
Mixpost is ideal for businesses looking to maximize their social media impact while maintaining control over their data and avoiding ongoing subscription costs. Its open-source nature also allows for customization and community-driven improvements.
Looking for open source alternatives to other popular services? Check out other posts in the alternatives series and openalternative.co, a directory of open source software with filters for tags and alternatives for easy browsing and discovery.
Plan, schedule, and auto-publish social media content across 10+ networks with a visual calendar, AI captions, team approvals, and self-hosting support.

TryPost is a social media scheduling tool for creators, freelancers, and agencies who want to manage content across multiple networks without juggling separate apps or paying per-channel fees. It's a direct alternative to tools like Hootsuite, and you can self-host it for free or use the managed cloud.
The core workflow is straightforward. Write a post once, preview how it renders on each network, then queue it across Instagram, Facebook, LinkedIn, X, TikTok, YouTube, Pinterest, Threads, Bluesky, and Mastodon from a single editor. Instagram's 4:5 crop and X's 16:9 framing show up in the preview before anything goes live.
Key capabilities:
For agencies, each client gets a separate workspace with its own brand kit and designated reviewers. Switching between clients takes one click instead of logging in and out of multiple dashboards. Tools like Postiz and Mixpost cover similar ground, but TryPost's approval flow and per-client workspace model are built specifically for the agency use case.
Because it's fully open source, there's no vendor lock-in. You can inspect the code, contribute on GitHub, or deploy on your own infrastructure for complete data control.