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PJ

Research · evidence

ProofJump verifies an AI answer sentence-by-sentence, back to the source.

For every claim in an AI answer, jump to where it actually appears in the page — or see that it has no source. It sells verifiability, not another AI sidebar.

Add to Chrome See pricing
product screenshot · ProofJump panel
ProofJump — panel
product screenshot · ProofJump popup
ProofJump — popup

Every sentence, its source

Click a claim and ProofJump highlights the exact passage on the page it came from.

sentence anchor

Or exposes the gap

When a claim has no matching source, it says so plainly instead of hiding it.

honest by design

What Pro buys

Bring-your-own-key AI, cross-document verification and export of a checked answer.

BYOK · from $4/mo

Pricing

Buy right here — checkout is handled by Paddle.

Free

$0

Add to Chrome
  • Sentence-to-source anchoring
  • Highlight on page
  • Single-page verification
Recommended

Pro

$3.99/mo

Upgrade to Pro

Secure checkout by Paddle · cards, Alipay, WeChat Pay

  • Everything in Free
  • Bring-your-own-key AI
  • Cross-document verification
  • Export checked answers

Team

$8/seat/mo

Contact sales
  • Everything in Pro
  • Shared workspaces
  • Centralized billing
  • 5+ seats

Unlock Pro across all our paid extensions — and every new one we ship. See the bundle →

Private by construction

local processing · zero tracking · no data sold

Questions people ask

Does it call an AI service?
Only if you enable it with your own key. The core anchoring runs locally on the page you're reading.
What if the answer has no source?
ProofJump marks the claim as unsupported — surfacing gaps is the whole point.
Which pages does it work on?
Any readable article or paper page; it anchors claims against the visible text.

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