How is HTMLRadar different from Papermark?

Both are open-source AGPL-3.0 document trackers. Papermark is PDF-first with data rooms; HTMLRadar is HTML-native with section-level dwell tracking for decks, briefs, and proposals.

Is HTMLRadar open source like Papermark?

Yes — same AGPL-3.0 license. The tracker, proxy worker, schema, and web app are all on GitHub and can be self-hosted.

HTMLRadar's paid tier is $15/mo flat. Papermark's entry paid tier is €24/mo. Both have free tiers, and both can be self-hosted for free.

HTMLRadar vs Papermark

We borrowed Papermark's playbook. Then aimed it at HTML.

Papermark is the open-source DocSend alternative for PDFs. They grew past $900K ARR (by their own public numbers) doing exactly what we're doing — open-source code, hosted SaaS, AGPL license. Honest answer: if you live in PDFs, use them.

But if you live in HTML — investor decks rendered to a browser, AI-generated briefs, founder pitches that work better in a tab than as a download — PDF tools force you back into PDFs to track. HTMLRadar tracks what you already have.

	HTMLRadar	Papermark
Native format	HTML	PDF / PowerPoint
Section-level dwell	Yes — heading-based, 3s threshold	Page-level only
Per-recipient links	Yes	Yes
Password + expiry per share	Yes	Yes (free)
Version control (replace, keep links)	Yes	Yes
Free hosted tier	2 tracked links	50 documents
Watermark on user content	No — chrome only	No
Custom domain	Coming soon	Business tier
Open source	AGPL-3.0	AGPL-3.0
Pricing (entry paid tier)	$15/mo	€24/mo

Those are the hosted free tiers, for trying each tool. HTMLRadar is AGPL-3.0 end to end — self-host it on your own Cloudflare and Supabase for unlimited tracked links at no cost. The whole product is open source, not open-core.

When to use HTMLRadar

· You write decks as HTML (Claude artifacts, ChatGPT, reveal.js, hand-coded)
· You want section-level reading data, not just page-views
· You care that the document stays clean (no watermark on your content)

When to use Papermark

· You live in PDFs already and don't plan to switch
· You need data rooms or e-signature in one product
· You want a mature, well-funded product with a larger team behind it

Both products are AGPL-3.0. Both are bootstrapped. We hope they both do well.

Common questions

How is HTMLRadar different from Papermark?: Both are open-source AGPL-3.0 document trackers. Papermark is PDF-first with data rooms; HTMLRadar is HTML-native with section-level dwell tracking for decks, briefs, and proposals.
Is HTMLRadar open source like Papermark?: Yes — same AGPL-3.0 license. The tracker, proxy worker, schema, and web app are all on GitHub and can be self-hosted.
Which is cheaper?: HTMLRadar's paid tier is $15/mo flat. Papermark's entry paid tier is €24/mo. Both have free tiers, and both can be self-hosted for free.

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