Pricing
Capabilities that are rare in one browser PDF tool: your PDF never leaves the browser, quantum-resistant signatures, and remote notary attestation — a different posture from DocuSign, Adobe, or Smallpdf.
Free tier always available. Two paid tiers (Pro + Max), billed monthly or annually. No seats, no contract calls, cancel anytime.
Free
forever
- Unlimited fill, redact, OCR, watermark & convert
- Unlimited on-device auto-fill
- 10 signed PDFs/mo, then ‘Signed with AttachKit’ footer
- 5 edited PDFs/moEditing — replace existing text, redraw, place form controls — is metered per month; fill & redact stay unlimited, and your other tools keep working.
- 10 AI actions/mo (auto-fill, redact, clause review)AI auto-fill is the magic — it fills a whole form from your saved profile in one click. Out of actions? Every manual tool still works free, and Pro unlocks a far larger monthly allowance.
- Saved profile for one-click autofill
- 2 reusable form templates
- Encrypted drafts to resume later
Pro
Most popularBilled annually at $120/yr — save $24/yr
- Everything in Free, plus:
- Unlimited signed PDFs
- Unlimited editing (replace text, shapes & form controls)
- No footer on your signed PDFs
- Bulk send (up to 50 recipients)
- Bulk-fill forms from a CSVDrop a spreadsheet, get one filled PDF per row in a ZIP — still 100% in your browser, nothing uploaded.
- Real-time co-signSign a PDF together over a direct connection — the file never touches our server.
- Unlimited reusable form templates
- 200 AI actions/mo — auto-fill, redact, clause review & drafting
Max
Billed annually at $192/yr — save $36/yr
- Everything in Pro, plus:
- Confidentiality & privilege
- Privileged AI (Local AI mode)A cryptographic attestation that no third-party AI ever saw your document; processing stays on your device.
- Sealed send + tamper-evident historyOnly the recipient can decrypt — we never hold a readable copy — and every edit is cryptographically linked, so you can prove what changed and when.
- 500 AI actions/mo — auto-fill, redact, clause review & drafting
- Signatures & verification
- Quantum-resistant, passkey-backed signaturesTimestamped and WebAuthn-bound — future-proofed against quantum attacks. Rare among consumer PDF tools.
- Long-term verifiable archives + embeddable verifierSigned PDFs stay provable for years, even offline (PAdES-aligned; strict PAdES-B-LTA on the roadmap). Paste a short snippet on any site so recipients can verify, with no callback to us.
- Multi-party signingWitnesses, co-signers, and “any N of M must sign” approval rules.
- Also included
- Remote notary attestationA passkey-bound attestation in a dual-passkey ceremony — a cryptographic record, not a substitute for your jurisdiction’s rules. Mobile notaries keep their fee; no separate Notarize subscription.
- API accessAI auto-fill mappings, clause review, and drafting from your own scripts, plus timestamp verification.
Stripe payments. Cancel anytime. All prices in USD.
A different category, not a cheaper DocuSign
Incumbents host your document and ask you to trust their servers. AttachKit is built so trust isn’t required — and every signature is provable by anyone, forever, with no callback to us.
Filling, signing, and redaction all run in your browser. Your PDF isn’t uploaded, stored, or readable by anyone at AttachKit.
On Max, signatures are passkey-backed (WebAuthn); every signed PDF is timestamped and tamper-evident — anyone can verify a document offline, with no account and no call home.
Quantum-resistant signatures and PAdES-aligned archives (strict PAdES-B-LTA on the roadmap) are built to stay verifiable for years — even if AttachKit is gone.