Best open-source alternatives to Buffer

Postiz is an open-source social media scheduling platform aimed at creators, marketers, and teams that need to plan and manage publishing across multiple networks. It presents itself as an alternative to tools like Buffer, Hypefury, and Twitter Hunter, and emphasizes AI-assisted scheduling, analytics, and audience growth. The project is built as a self-hostable web application with a modern stack including Next.js, NestJS, Prisma, PostgreSQL, Temporal, and email notifications via Resend. It supports collaboration features such as inviting teammates, commenting, and sharing or buying posts, and it is positioned for automation through a public API and integrations such as Node.js SDKs, n8n, Make.com, and Zapier.

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.