SigPen vs HelloSign:
Flat Pricing, No Per-Seat Math.
HelloSign (now Dropbox Sign) charges per seat and sells its API as a separate product. 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
- 14-day free trial
Per seat, billed annually
- Per-seat pricing (multiplies per user)
- Production API sold separately ($75+/mo)
- No AI field detection
- Unlimited signature requests
- Free plan (3 docs/month)
Full Feature Comparison
| Feature | SigPen | HelloSign |
|---|---|---|
| Pricing model | Flat per account | Per seat (Standard) |
| Team plan price | $49/month flat | $25/user/month |
| Cost for a 5-person team | $49/month total | $125/month ($25 x 5) |
| AI field detection | Automatic | Manual / templates |
| REST API (production) | Included on Professional ($29/mo) | Separate API plan (~$75/mo) |
| Webhooks | Professional plan | API plan only |
| Embed / iframe signing | Professional plan | API plan only |
| Reusable templates | Unlimited (Professional) | 5 (Essentials) / 15 (Standard) |
| Free plan | 14-day full trial | Yes, 3 requests/month |
| Unlimited signature requests | Yes | Yes (paid plans) |
| Bulk send | Yes (Business) | Standard plan |
| Audit trail | Yes | Yes |
| ESIGN Act / UETA compliant | Yes | Yes |
| Mobile signing | Yes | Yes |
| No long-term contract | Cancel anytime | Annual billing for listed price |
Pricing and features based on Dropbox Sign's publicly listed plans. Last updated June 2026.
Why Teams Choose SigPen Over HelloSign
No Per-Seat Tax
HelloSign's team plan charges $25 for every seat. A team of five is $125 a month. SigPen is one flat rate, with unlimited senders.
API and AI Built In
SigPen includes a REST API, webhooks, and AI field detection on the Professional plan. With Dropbox Sign, production API access is a separate product from around $75 a month, and field placement is manual.
Same Legal Standing
Both are ESIGN Act and UETA compliant. SigPen signatures carry the exact same legal weight as HelloSign, with a full audit trail on every document.
Frequently Asked Questions
Is SigPen cheaper than HelloSign?
For teams, yes. HelloSign (now Dropbox Sign) charges per seat: $15/month for one user (Essentials) or $25/user/month for teams (Standard). A five-person team runs $125/month on Standard, versus $49/month flat on SigPen. For a single heavy user, Dropbox Sign Essentials at $15/month can be cheaper than SigPen, but SigPen adds AI field detection and a bundled REST API that Dropbox Sign charges extra for.
Is HelloSign the same as Dropbox Sign?
Yes. HelloSign was renamed Dropbox Sign in 2022 after Dropbox acquired it. The product and plans are the same, and many people still search for the original HelloSign name. This comparison reflects the current Dropbox Sign plans.
Does SigPen have an API like HelloSign?
Yes, and it is included in the price. SigPen's Professional plan ($29/month) comes with a REST API, webhooks, and an embeddable signing widget. Dropbox Sign's API is a separate product: test mode is free, but production access starts around $75/month on top of an eSignature plan.
Does HelloSign have AI field detection?
No. With Dropbox Sign you place signature, date, and text fields manually or with reusable templates. SigPen's AI reads your PDF and places those fields automatically, then you adjust anything you need.
Is SigPen legally equivalent to HelloSign?
Yes. Both produce ESIGN Act and UETA-compliant electronic signatures, each with a full audit trail of timestamps, IP addresses, and signer consent.
Does HelloSign have a free plan?
Yes, a limited one. Dropbox Sign's free plan allows 3 signature requests every 30 days, which works for occasional signing. SigPen offers a 14-day free trial of the Professional plan, then unlimited documents from $9/month.
Compare SigPen to other e-signature tools
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