SigPen vs signNow:
Flat Pricing, API Included.
signNow is cheap to start but bills per seat and sells its API as a separate plan. SigPen is one flat rate, with AI field detection and a REST API built into the Professional plan.
The Price Reality
Flat rate, unlimited documents
- Unlimited documents
- No per-seat fees
- REST API & webhooks included
- AI field detection
- 70+ free fillable forms
Per seat, billed annually
- Per-seat pricing (multiplies per user)
- API sold separately ($146+/mo)
- No AI field detection
- Low entry price ($8/user)
- Strong integrations & mobile apps
Full Feature Comparison
| Feature | SigPen | signNow |
|---|---|---|
| Pricing model | Flat per account | Per seat (per user) |
| Lowest entry price | $9/month (10 docs) | $8/user/month |
| Team plan price | $49/month flat | $15/user/month (Business Premium) |
| Cost for a 5-person team | $49/month total | $75/month ($15 x 5) |
| AI field detection | Automatic | Manual / templates |
| REST API (production) | Included on Professional ($29/mo) | Separate API plan ($146+/mo) |
| Webhooks | Professional plan | API plan only |
| Embed / iframe signing | Professional plan | API plan only |
| Free forms library | 70+ fillable forms | None |
| Reusable templates | Yes | Yes (paid plans) |
| Bulk send | Yes (Business) | Business Premium plan |
| Audit trail | Yes | Yes |
| ESIGN Act / UETA compliant | Yes | Yes |
| Mobile signing | Yes | Yes |
| Free trial | 14 days, no card | 7 days |
| No long-term contract | Cancel anytime | Annual billing for listed price |
Pricing and features based on signNow's publicly listed plans. Last updated June 2026.
Why Teams Choose SigPen Over signNow
No Per-Seat Tax
signNow charges for every seat, from $8 to $30 per user. Team costs climb as you add people. SigPen is one flat rate, with unlimited senders.
API Included, Not $146 Extra
SigPen bundles a REST API, webhooks, and AI field detection into the Professional plan. signNow keeps its API on a separate plan that starts around $146 a month, and places fields manually.
Same Legal Standing
Both are ESIGN Act and UETA compliant. SigPen signatures carry the exact same legal weight as signNow, with a full audit trail on every document.
Frequently Asked Questions
Is SigPen cheaper than signNow?
It depends on your setup. signNow is one of the cheaper tools at entry, starting at $8/user/month (Business, billed annually). But it bills per seat, so a five-person team on Business Premium ($15/user) runs $75/month versus $49/month flat on SigPen. SigPen also bundles a REST API and AI field detection that signNow charges separately for or does not offer.
Does signNow include API access?
No. signNow's standard plans (Business, Business Premium, Enterprise) do not include API access. Its API is a separate product that starts around $146/month for 1,000 signature invites. SigPen includes a REST API, webhooks, and embedded signing on the Professional plan ($29/month).
Does signNow have AI field detection?
No. With signNow you place signature and data fields manually or with saved templates. SigPen's AI reads your PDF and places signature, date, and text fields automatically, then you adjust anything you need.
Is SigPen legally equivalent to signNow?
Yes. Both produce ESIGN Act and UETA-compliant electronic signatures, each with a full audit trail of timestamps, IP addresses, and signer consent.
Does signNow charge per user?
Yes. signNow prices every plan per seat, from $8/user/month (Business) to $30/user/month (Enterprise), billed annually. SigPen is one flat rate per account, so adding people to your team does not increase your bill.
What does SigPen offer that signNow does not?
Three things stand out: AI field detection that places fields for you, a REST API bundled into the $29/month plan instead of a separate API subscription, and a free library of 70+ fillable IRS, state, and business forms. SigPen is also flat-rate, so team size never changes the price.
Compare SigPen to other e-signature tools
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