The best open source alternative to Postel is Postiz. If that doesn't suit you, we've compiled a ranked list of other open source Postel alternatives to help you find a suitable replacement. Other interesting open source alternative to Postel is Contentport.
Postel alternatives are mainly Social Media Management Tools but may also be Marketing Automation Tools. Browse these if you want a narrower list of alternatives or looking for a specific functionality of Postel.
Self-hostable social media scheduler that lets you plan, generate, and publish content across 30+ networks with AI assistance, team collaboration, and automation integrations.

Postiz is a self-hostable social media management tool for creators, developers, and agencies who want to schedule and publish content across 30+ networks from one place. It covers the full workflow: drafting posts, generating visuals, scheduling, cross-posting, and tracking performance, without juggling multiple platform dashboards.
The core scheduling experience centers on a visual calendar where you write once and publish to multiple channels simultaneously. Each channel gets its own preview before the post goes out, so you can adjust copy, hashtags, or media per platform without duplicating effort.
Key capabilities:
Developers can build on top of Postiz using its OAuth2 SDK and public API, making it practical as a backend for custom posting tools. Agencies benefit from client workspaces that keep channels, calendars, and analytics separated per brand under one login.
Plans start at $29/month for solo creators with 5 channels, scaling to $99/month for 100 channels and unlimited posts. The codebase is open source and self-hostable for teams that want full control over their data.
Create, schedule & manage Twitter content at scale with AI assistance, beautiful visuals, and multi-account support. Perfect for busy founders.

Transform your Twitter presence with a comprehensive content management platform designed specifically for technical founders and content managers. Create engaging tweets and threads with AI assistance, add beautiful visuals without design skills, and schedule content for optimal engagement times.
Key features that set Contentport apart:
Perfect for busy professionals who want to maintain consistent Twitter growth without spending hours on content creation. The platform learns your writing style and helps you build a repeatable workflow that saves 5+ hours per week. With both free and pro tiers available, you can start building your Twitter presence immediately and scale as your needs grow.
Trusted by over 1,370 founders who've discovered that consistent, high-quality content is the key to Twitter success.