Postcard - An Open Source Social Networking Platform for Website Owners

In plain words

Postcard is an open source social networking platform designed for website owners. It provides an open API protocol that developers can integrate into their projects. The platform enables website owners to build social features and community engagement on their own sites rather than relying on external social networks.

written from the facts on this page · September 2026

From the sources

In the maker’s words, at launch

Hi Everyone, Today I'm proud to announce the upcoming launch of Postcard. You can visit the launch page here - http://www.postcardsocial.net However, since this is Hacker News, I thought the community might be more interested in my blog entry which explains in detail why the project should be of interest to…

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  Today I'm launching Postcard! I started Postcard when I deleted most social media, but still wanted a way to keep in touch with friends and my network. When I worked at Webflow, it became clear to me that most website builders are way too complex for individual users. So, I drew inspiration from social media - where all you need is a couple photos and text fields to get a great site online. So, I think I’ve about achieved a site builder that even my Mom could use. The product seems simple, but there are many under-the-hood optimizations. There's caching, CDNs, custom domain support, TLS…

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