Open Source Buffer Alternatives

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:

• Cross-posting to 30+ networks including LinkedIn, Instagram, X, and more, with per-channel customization before publishing
• AI content assistant that drafts captions, threads, hooks, and hashtags tuned to each platform, plus AI image and short video generation
• Agentic scheduling via MCP server and CLI, letting tools like Claude, ChatGPT, or Codex draft and schedule posts directly from your terminal or chat interface
• Automation integrations with n8n, Make.com, and Zapier, plus a public REST API and webhooks for custom workflows
• Evergreen recycling to repeat top-performing posts on a set cadence, and RSS auto-posting to turn a blog feed into a social schedule
• Team collaboration with unlimited members on paid plans, organized into customer groups for agencies managing multiple brands
• Analytics dashboard pulling per-post and per-channel data (impressions, reach, engagement) from each network's API into one view

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.

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.

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.