SigPDF vs Formstack Sign
Formstack Sign is a workflow-focused e-signature platform — but it uploads your documents to its cloud and costs from $17/month. SigPDF processes everything locally in your browser at €2.08/month. No upload, no workflow lock-in.
No file uploadsNo watermarksNo account requiredFrom €2.08/month
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SigPDF vs Formstack Sign — Comparison
| Feature | SigPDF | Formstack Sign |
|---|---|---|
| Privacy | Files never leave your browser | Documents uploaded to Formstack cloud |
| Price | From €2.08/month (annual) | From ~$17/month |
| Watermarks | Never | None on paid plans |
| Account required | No | Yes |
| Multi-party signing | No | Yes |
| Form/CRM integrations | No | Yes (Formstack, Salesforce) |
| Works offline | Yes (after loading) | No |
When Formstack Sign is the better choice
- You need integrated e-signature workflows with Formstack forms or Salesforce
- You collect signatures from multiple parties at scale
- You need automated document routing and audit trails
When SigPDF is the better choice
- You sign your own documents — no complex workflows needed
- Privacy matters — no document uploads, no cloud
- Cost is important — €2.08/month vs $17/month
- You want to start signing immediately without an account
Frequently Asked Questions
What is Formstack Sign?
Formstack Sign (formerly InsureSign) is a cloud-based electronic signature platform that integrates with Formstack forms and other business tools. It is designed for businesses that need to collect signatures as part of workflows. Paid plans start around $17/month.
Does Formstack Sign upload my documents to its servers?
Yes. Formstack Sign is a cloud-based service — your documents are uploaded to Formstack's servers for processing, storage, and workflow management. SigPDF processes everything locally in your browser with no uploads.
Is SigPDF cheaper than Formstack Sign?
Yes. Formstack Sign starts at approximately $17/month. SigPDF starts at €2.08/month (annual billing) — substantially less expensive, with unlimited signatures and no per-document or per-seat fees.
Does Formstack Sign integrate with forms and CRMs?
Yes. Formstack Sign is designed to integrate with Formstack forms, Salesforce, and other business tools. SigPDF is a standalone PDF signing tool without third-party integrations — it focuses on private, browser-based PDF signing.
Which is more private — SigPDF or Formstack Sign?
SigPDF is significantly more private. Your documents are processed entirely in your browser — no personal data is transmitted to SigPDF. Formstack Sign uploads documents to its cloud and stores them as part of the workflow and audit trail.
Who should use Formstack Sign vs SigPDF?
Formstack Sign is ideal for businesses that need integrated e-signature workflows with forms, CRMs, and automated document routing. SigPDF is ideal for individuals and businesses that need to sign their own PDFs privately, without cloud uploads, at significantly lower cost.
Do I need an account to use SigPDF?
SigPDF allows full preview without any account. Formstack Sign requires an account and paid subscription to use. SigPDF requires a paid subscription only to download signed documents.