ProofStamper vs DocuSign: Proof of Existence vs Proof of Consent
ProofStamper and DocuSign are fundamentally different tools. DocuSign is an e-signature platform — it proves that someone agreed to a document (proof of consent). ProofStamper is a timestamping tool — it proves that a file existed at a specific date (proof of existence). They don't compete — they solve different problems. Depending on your situation, you may need one, the other, or both.
If you've ever searched for a way to protect a file, prove a date, or secure a document, you've probably encountered both timestamping tools and e-signature platforms. They look similar from the outside — both involve documents and some form of certification. But they answer completely different questions. Understanding the difference will save you time, money, and potentially a legal headache.
The core difference in one sentence
"This file existed at this date." — Proves: existence
"This person agreed to this document." — Proves: consent
One proves a moment in time. The other proves a meeting of minds. Both are valuable — but they're not interchangeable.
Feature-by-feature comparison
| ProofStamper | DocuSign | |
|---|---|---|
| What it proves | A file existed at a certified date | A person agreed to a document |
| Legal concept | Proof of existence (antériorité) | Proof of consent (signature) |
| Standard used | RFC 3161 (international timestamping) | eIDAS / ESIGN Act / UETA (e-signature) |
| Who is involved | Only you — no other party needed | At least 2 parties (signer + sender) |
| File privacy | Zero-knowledge — file never leaves your device | Document uploaded to DocuSign's servers |
| Account required | No | Yes |
| Free tier | Yes — unlimited timestamps | Very limited (3 signatures/month) |
| Speed | 30 seconds | Depends on the other party signing |
| Works with any file | Yes — any format, any size | Primarily PDFs and documents |
| Independent verification | Yes — anyone can verify with OpenSSL | Requires DocuSign's platform |
| Audit trail | Cryptographic proof (Proof Pack) | Platform-based audit trail |
When to use ProofStamper
- You created something and want to prove when: You're a designer, developer, writer, or photographer. You want a dated record of your work in case someone copies it or disputes your timeline.
- You're delivering a file and want proof of the date: You're a freelancer sending deliverables to a client. If the client later claims you delivered late, your timestamp is independent proof.
- You want to document the state of a file at a point in time: A contract, a policy, a set of terms — you want to prove this exact version existed on this exact date.
- You need proof but want to keep your file private: Your file contains sensitive information. ProofStamper's zero-knowledge architecture means no one ever sees your file.
When to use DocuSign
- You need someone to sign a contract: A client, a vendor, an employee — someone needs to read a document and formally agree to it.
- You need a legally binding agreement between parties: Employment contracts, NDAs, lease agreements — any document that requires mutual consent and a verifiable signature.
- You need workflow automation for approvals: Multiple signers, conditional routing, reminders, templates — DocuSign is built for managing complex signing workflows.
- You need compliance with e-signature regulations: If your industry requires qualified electronic signatures (QES) under eIDAS, or SOC 2 Type II compliance.
When you might need both
In many real-world scenarios, the strongest protection comes from combining both tools.
- Protecting a contract before sending it for signature: Timestamp your contract with ProofStamper before sending it via DocuSign. If the other party later claims the terms were different, your timestamp proves the original version.
- Freelancer delivering work + getting sign-off: Timestamp your deliverable (proof of date), then send it for signature (proof of acceptance). You now have both: proof you delivered on time, and proof the client accepted.
- IP protection + licensing agreement: Timestamp your original creation to establish proof of authorship date. When you license it, the licensee signs via DocuSign. The timestamp proves you had the work first.
The two tools don't overlap — they complement each other. ProofStamper handles the "when" (proof of existence), DocuSign handles the "who agreed" (proof of consent).
Frequently asked questions
- Can DocuSign prove when a file was created?
- DocuSign records when a document was signed, not when it was created. Its audit trail shows the signing timeline, but it cannot prove a file existed before it was uploaded to the platform.
- Can ProofStamper replace DocuSign?
- No — they solve different problems. ProofStamper proves existence (a file existed at a date). DocuSign proves consent (a person agreed to a document). If you need signatures, you need an e-signature tool.
- Is ProofStamper a type of digital signature?
- Not exactly. A digital signature proves who signed something. A certified timestamp proves when something existed. They use similar cryptographic technology but serve different legal purposes.
- Which is more legally valid?
- Both are legally recognized, but for different things. DocuSign's e-signatures are valid under eIDAS, ESIGN Act, and UETA for proving consent. ProofStamper's RFC 3161 timestamps are recognized under eIDAS (Article 41) for proving existence at a date.
- Can I use ProofStamper for free?
- Yes. Basic timestamps are free, with a watermarked PDF certificate. Pro features (watermark-free, batch processing, custom branding) are available from $9/month.
- DocuSign costs $10-40+/month. Is ProofStamper cheaper?
- ProofStamper's core feature is free. The Pro plan is $9/month. But they're not substitutes — comparing their price is like comparing a lock and a key: you might need both.