Open Source Mixpost Alternatives

Postiz is an open-source social media management platform that lets you write a post once and publish it to 30+ networks simultaneously. Each channel gets its own preview before you schedule, so you can adjust copy, hashtags, or media per platform without duplicating your whole workflow. A visual calendar shows everything at a glance, including recurring posts and upcoming auto-repeats.

The built-in AI agent can draft captions, generate images, and produce short video clips from a single chat prompt. You can instruct it to write a LinkedIn post, attach a matching image, and schedule it for a specific time, all in one go. Postiz also connects to external AI tools including Claude, ChatGPT, and Codex via an MCP server and CLI.

For teams and agencies, paid plans support unlimited members, customer groups for organizing multiple brands, and per-group calendars and analytics. Analytics pull from each network's official API and display impressions, reach, engagement rate, and more in one dashboard. Tools like SocialPilot and Iconosquare cover similar ground, but Postiz adds self-hosting as an option.

Automation integrations include n8n, Make.com, Zapier, and a public REST API with webhooks. RSS auto-posting, available on Team plans and above, can turn a blog feed into a consistent posting cadence without manual input.

Plans start at $29/month for solo users (5 channels, 400 posts/month) and scale to $99/month for agencies managing up to 100 connected accounts. The codebase is open source and self-hostable for teams that prefer to run it on their own infrastructure.

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:

• Visual calendar with drag-and-drop scheduling. Filter by network or workspace, see a full month at a glance, and reorder posts without rebuilding queues.
• Auto-publishing via each network's official API. Set the time and walk away; you only get notified if something fails.
• AI captions built into the composer, so you're not starting from a blank box.
• Team workflows with real-time co-editing, inline comments, and approval flows. Clients can approve posts through a shareable link without needing an account.
• Media library for storing and reusing images and videos across posts without re-uploading.
• Analytics tracking followers, reach, and engagement across networks in one chart, updated in real time.

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.