Mailchimp vs Postiz-app
Mailchimp and Postiz-app are both marketing automation software. Mailchimp is a commercial product from Intuit. Postiz-app is open source under AGPL-3.0, with 41k GitHub stars.
Which to pick
- Pick Mailchimp when
- A small business or nonprofit wants a familiar email newsletter tool with lots of templates.
- Pick Postiz-app when
- You manage several social accounts and want a Buffer alternative you can self-host or buy hosted.
Side by side
Email marketing with templates, audience segmentation, automations, landing pages and basic e-commerce integration, owned by Intuit.
A social media scheduler for planning, publishing and analysing posts across many networks, with team collaboration and AI assistance.
Prices have risen and the free plan has shrunk, while competitors offer more automation per dollar.
Each network needs its own developer app and API approval when self-hosting, and the app is AGPL licensed.
Production-ready
Usable
Cloud service and mobile app
Self-hosted server and cloud service
Not published
TypeScript, NestJS, Next.js, Prisma and Redis
Closed source, sold by Intuit
Open source, AGPL-3.0 (network copyleft)
Closed source: you use it under the maker's terms and cannot change or resell the code.
Use inside your business is unrestricted. If you change it and let customers use it over the internet, you must publish your changes.
1k Wikipedia readers a month on phones
41k GitHub stars
Not known
Established: started 3 years ago, latest release v2.25.3.
Other comparisons
More marketing automation platforms
Both sides were judged on 2026-11-03 from makers' descriptions, Wikipedia, READMEs and GitHub data. License, age and popularity lines are worked out directly.