Seamstack
Under the hood

How Seamstack is built

Seamstack is built entirely on open-source software. That means no lock-in, no proprietary formats, and no single company between you and your data.

Why open source matters for you: if Seamstack ever disappeared tomorrow, every tool we use — the forum, the shop, the database — has a large independent community behind it. Your data stays readable and portable. You're never trapped.
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Next.js

The website engine

Your site and the Seamstack platform both run on Next.js — the same technology used by Vercel, Loom, and thousands of production apps. Fast, reliable, and actively maintained.

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Keystatic

The content editor

Keystatic is an open-source content management tool that stores your pages, articles, and settings as plain files — not locked inside a proprietary database. You can always read and export your content.

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Discourse

The community forum

Discourse is the world's most popular open-source forum software, trusted by Apple, NASA, and thousands of communities. Your forum data is yours — export it any time.

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Medusa

The online shop

Medusa is an open-source commerce engine — no transaction fees, no vendor lock-in. Everything your shop earns goes to you (minus the payment processor's standard rate).

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Cloudflare

Global hosting & security

Seamstack sites run on Cloudflare's global network — fast everywhere, DDoS-resistant, with automatic HTTPS. Your site is served close to your visitors, wherever they are.

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PostgreSQL on Neon

The database

All your site data — members, posts, settings — lives in a standard PostgreSQL database. It's the most widely used open-source database in the world, and your data is exportable in standard SQL at any time.

Your data, your rules

Export your full site — content, members, posts — at any time from your account settings. No export fees, no gatekeeping, no “premium export” tiers. It's your data.

Build my site — free →About Seamstack