Principia Synthesia

Publish what matters.

Start writing for free — no credit card, no catch.
Pro and Team tiers are coming for publishers who need more room.

Free

$0

forever

  • 3 articles
  • 1 book
  • Public read-only
  • Basic animations
Get started free

Pro

Soon
$9

per month

  • Unlimited articles & books
  • PDF / EPUB export
  • Custom theme
  • Animations library

Team

Soon
$29

per month

  • Everything in Pro
  • Collaboration
  • Permissions
  • Audit logs
  • Priority support

What does “coming soon” mean?

Pro and Team are actively in development. Sign up for Free now and you'll be first to know when they launch.

Can I keep my content if I don't upgrade?

Yes — everything you publish on Free is yours permanently, publicly accessible, and never paywalled.

What export formats will Pro support?

PDF with full LaTeX rendering and EPUB for e-readers. HTML bundles and citation exports are on the roadmap.

No credit card required?

The Free tier needs no payment information, ever. You'll only be asked when Pro or Team become available.