Meet Kura

The PDF standards and preflight engine. Convert any PDF to every PDF/A level, PDF/UA, PDF/X, PDF/E and PDF/VT, then preflight the result against 396 bundled profiles to confirm it conforms.

Ships as a CLI, npm package, browser WebAssembly build, Docker image and C library.

See pricing Visit website View on GitHub
25conformance targets
396bundled preflight profiles
0false findings in conformance testing
5form factors, one engine

Open source, self-hosting and internal use stay free. Kura is licensed under the AGPL-3.0. If your project is AGPL-compatible, or you run Kura as-is for yourself, you never need a commercial license. Commercial licenses are only for shipping Kura inside closed-source software.

Commercial Licenses

Per product, billed annually. Every tier includes all updates and new releases while active.

Solo

One developer, under $100k annual revenue

$99/ year
  • One closed-source product
  • All updates while active
  • Email support
Get Solo

Indie

Companies under $1M annual revenue

$199/ year
  • One closed-source product
  • Unlimited developers
  • All updates while active
  • Email support
Get Indie

Business

Companies at $1M annual revenue or more

$499/ year
  • One closed-source product
  • Unlimited developers
  • All updates while active
  • Priority email support
Get Business

OEM

Redistribution, reselling as an SDK, or offering Kura as a service

from$1,999/ year
  • Redistribution rights
  • Terms shaped to your product
  • Priority support
Contact us

Commercial license details

Delivery & licensing model

  • No license key is required or provided. Kura intentionally does not use license keys, to streamline deployment and reduce operational friction.
  • Upon purchase you receive a ZIP archive containing the complete Kura source code.
  • Because Kura is open source, every release and every update can always be downloaded from our GitHub releases page.
  • The source code provided is identical to the code published in our public open-source repository.
  • No refunds. Under no circumstances shall a refund be made after purchase.

GitHub repository: github.com/alam00000/bentopdf-kura

Invoicing

  • We use Polar for payments, which automatically sends invoices via email after purchase.
  • Polar handles VAT invoices for businesses in applicable regions.
  • For VAT invoices, select "I'm purchasing as a business" during checkout and enter your billing address and Tax/VAT number.

What each tier covers

Every tier lets you ship Kura inside one closed-source product. The tiers differ by who you are, how many developers you have, and whether Kura is passed on to anyone else.

Solo Indie Business OEM
Who it's for One developer, under $100k annual revenue Companies under $1M annual revenue Companies at $1M annual revenue or more Anyone redistributing, reselling or hosting the engine
Annual price $99 $199 $499 from $1,999
Developers covered One developer Unlimited Unlimited Discussed with you
Closed-source products covered One One One Terms shaped to your product
Updates while active
Support Email Email Priority email Priority
Redistribute inside someone else's product
Resell as an SDK
Offer Kura as a hosted service

Redistribution, reselling and hosting are what separate OEM from the rest. If Kura only ships inside your own closed-source product, the choice between Solo, Indie and Business is purely a question of your size.

License Terms

Per product

A license covers one shipped product. A second product needs a second license, or ask about covering your whole catalogue at OEM.

Updates included

Every release published while your license is active is yours. If you let it lapse, you keep a perpetual right to the last version you received.

No AGPL obligations

The commercial license replaces the AGPL for your product. You ship closed source, with no requirement to publish your changes or your application.

Clean provenance

Kura is written and owned by BentoPDF, and every third-party component it links, including qpdf, PDFium and FreeType, is permissively licensed. No copyleft surprises in your supply chain.

Frequently Asked Questions

Only if you ship Kura inside closed-source software. Open-source projects under an AGPL-compatible license, self-hosting, and internal use are all free under the AGPL-3.0.

No. Kura is a separate project with its own license. The BentoPDF app license does not grant any rights to Kura, and a Kura license does not cover BentoPDF.

You move up to the matching tier at your next renewal. Nothing retroactive. Growing past a threshold mid-term never invalidates your current license.

Not sure which tier fits?

Tell us what you're building and we'll tell you what it costs. No calls required.

contact@bentopdf.com