E-signatures without the per-envelope tax.
Send unlimited documents from $9/mo — and let AI place every signature, date, and initial field for you. No per-envelope fees, ever.
14-day free trial · no credit card ESIGN & UETA compliant
Get documents signed in minutes
No training required. Upload, let AI place the fields, and send. It really is that simple.
Upload your PDF
Drag in any contract, form, or agreement. AI Detect finds your signature, date, and initial fields — no manual dragging.
Add signers & send
Enter a recipient's email. They get a secure signing link — no account or download on their end.
Signed & sealed
Signers click, sign, done. You get a legally binding PDF with a full audit trail — and an instant notification.
The features that actually matter
Everything you need to collect legally binding signatures. Nothing you don't.
AI Field Detection
AI reads your document and places signature, date, and text fields automatically. No manual setup.
Legally Binding
ESIGN Act compliant with tamper-evident audit trails. Every signature includes timestamp, IP, and consent record.
Reusable Templates
Turn any document into a template. Send your NDA or contractor agreement with one click, every time.
Team Collaboration
Share documents across your team, track who's sent what, and stay on top of pending signatures together.
Shareable Form Links
Generate one public link anyone can open to fill and sign — perfect for waivers, applications, and intake forms.
Developer API & Embed
Full REST API, webhooks, and embeddable signing to wire e-signatures straight into your own product.
Why businesses switch to SigPen
DocuSign charges per envelope. SigPen charges per month — that's it.
| Feature |  $29/mo | DocuSign$40/user/mo |
|---|---|---|
| Document allowance | Unlimited | ~100 / year |
| Overage fees | None ever | ~$1–$3 per extra envelope |
| AI field detection | Automatic | Manual anchor tags |
| API access | Business plan | Paid add-on |
| Free trial | 14 days, no card | 30-day trial |
| ESIGN Act compliant | Yes | Yes |
| Audit trail | Yes | Yes |
Signatures that hold up
Every document is legally binding, encrypted, and fully auditable — no fine print, no lock-in.
Legally binding
Compliant with the ESIGN Act and UETA. Signatures are court-admissible and enforceable.
Encrypted & secure
Documents are protected with bank-level encryption in transit and at rest. Your data stays yours.
Complete audit trail
Every signature records a timestamp, IP address, and consent — tamper-evident on each document.
No lock-in
Cancel anytime and export your signed PDFs whenever you want. No contracts, no per-envelope traps.
Who uses SigPen
Real estate agents, HR teams, freelancers, and developers — all for the same reason: it just works.
Real Estate
Send lease agreements, purchase offers, and disclosures for signature in seconds. No printing, no faxing.
Learn moreHR & Hiring
Onboard employees faster. Send offer letters, NDAs, I-9s, and W-4s — all in one place.
Learn moreFreelancers & Agencies
Get contracts signed before you start work. Build reusable templates for your most-used agreements.
Learn moreLegal & Compliance
ESIGN Act compliant signatures with full audit trails. Every document is tamper-evident and court-admissible.
Learn moreDevelopers & APIs
Embed signing into your product. Full REST API, webhooks, and mergeData for automated document workflows.
Learn moreSmall Businesses
Close deals faster. Send proposals, contracts, and invoices for signature without leaving your browser.
Learn morePay monthly. Send unlimited.
Flat monthly pricing with no per-document fees. Ever.
Starter
For individuals
10 documents / month
- AI field detection
- Reusable templates
- Audit trail & ESIGN compliance
Professional
For growing businesses
Unlimited documents
- Everything in Starter
- Unlimited sends, no per-doc fees
- Shareable public form links
Business
For teams & developers
Teams + API + Analytics
- Everything in Professional
- Team collaboration & analytics
- REST API, webhooks & embed
All plans include a 14-day free trial · No credit card required · Cancel anytime
View full pricing & feature comparison →
Free fillable forms
Sign IRS forms, NDAs, and more — free, online, no account needed.
From the blog
View allHow to Embed Document Signing in Your App with an Iframe
A step-by-step guide to embedding SigPen's signing experience directly in your web app using an iframe, JWT tokens, and postMessage events.
How HR Teams Can Digitize Employee Onboarding with E-Signatures
Paper-based onboarding costs HR teams hours per new hire. Here's how to move offer letters, NDAs, and onboarding packets to a digital signing workflow that takes minutes instead of days.
How Freelancers Can Send Contracts and Get Paid Faster with E-Signatures
A signed contract means a protected project. Here's how freelancers can send professional contracts, collect e-signatures in minutes, and stop chasing down paperwork.
Stop chasing signatures.
14-day free trial. No credit card. Cancel anytime.
Create your free accountFreelancers, HR teams, and real estate agents get documents signed with SigPen every day.