Best open-source alternatives to Buffer

Postiz is an open-source social media scheduling platform aimed at individuals, teams, and businesses that want to plan and manage content across multiple networks. It positions itself as an alternative to tools like Buffer and Hypefury while emphasizing AI-assisted workflows, analytics, and collaboration. The project is built as a self-hosted application with a modern web stack and is intended to integrate with automation tools such as n8n, Make.com, and Zapier. The README also highlights compliance-oriented behavior: the hosted service uses official OAuth flows, users authenticate directly with social platforms, and the system does not collect or proxy user API keys or access tokens.

Socioboard is an open source social media management and content marketing platform aimed at businesses, agencies, and teams that need to manage a presence across multiple social networks. The README describes it as a tool for creating, planning, and scheduling posts, coordinating team workflows, and generating analytics and reports to support marketing decisions. The project is presented as Socioboard Core, a customizable and extensible platform with a centralized API and a web application frontend, plus mobile apps on iOS and Android. It emphasizes multi-account management, team collaboration, permissions, automated posting, RSS-based content discovery, and email reporting. The README also notes a commercial SaaS version alongside the open source version.

Mixpost is a social media management platform aimed at businesses, marketing teams, agencies, and solo users who want to organize and automate their publishing workflow. It centralizes multiple social accounts, helps users plan and schedule posts, and provides analytics to track audience engagement across platforms. The project also emphasizes collaboration through workspaces, task assignment, permissions, and performance monitoring, making it suitable for teams that manage content together. The README presents it as the Lite version of Mixpost Pro, with a free MIT-licensed codebase and a separate commercial Pro/Enterprise offering.