Formstack is an alternative
to BlockSurvey
$99/mo (Forms) vs BlockSurvey Premium at $99/mo — covering 14% of the 7 compared capabilities.
Same job. Compare the fees.
Comparison scenario
Every cheaper-than claim is tied to a defined scenario — never a bare list price.
1,000 responses/month, 1 seat, monthly billing · USD · prices as observed on official pricing pages.
Premium plan at $99/mo, the cheapest paid plan.
Forms: 99 USD/monthly.
BlockSurvey costs $99/mo on the Premium plan at 1,000 responses/month, 1 seat, monthly billing. Formstack costs $99/mo (Forms plan), which is not cheaper than BlockSurvey Premium at $99/mo in this scenario.
Capability comparison
Formstack covers 14% of the 7 capabilities compared against BlockSurvey. ✓ native · ◐ via integration · ✗ not found.
| Capability | Formstack | BlockSurvey |
|---|---|---|
| Unlimited forms | ✗ | ✓ |
| Conditional logic | ✗ | ✓ |
| File uploads | ✗ | ✓ |
| Payment collection | ✓ | ✓ |
| Signature collection | ↑ Suite | ✓ |
| Custom domain | ✗ | ✓ |
| Webhooks | ✗ | ✓ |
What you give up
Capabilities BlockSurvey has that Formstack lacks.
- Unlimited forms — Create as many forms as you need without hitting a plan cap.Missing from Formstack.
- Conditional logic — Show or skip questions based on earlier answers.Missing from Formstack.
- File uploads — Let respondents attach files as part of their answers.Missing from Formstack.
- Signature collection — Collect legally binding signatures within a form.Missing from Formstack.
- Custom domain — Serve forms on your own domain instead of the vendor's URL.Missing from Formstack.
- Webhooks — Send form submissions to other tools automatically as they arrive.Missing from Formstack.
Price at your volume
The same comparison recomputed at three sizes. Plan caps change who is cheapest.
| Usage | BlockSurvey | Formstack |
|---|---|---|
| 100 responses/month | $49/moStandard | $99/mocosts moreForms |
| 1,000 responses/month | $99/moPremium | $99/mosame priceForms |
| 10,000 responses/month | — | $99/moForms |
Plans & pricing, side by side
Advertised prices in USD as observed on the official pricing pages — per-seat and transaction-fee plans are marked.
| Forms | $99/mo |
| Suite | $299/mo |
| Enterprise | Contact sales |
| Free | Free |
| Standard | $49/mo |
| Premium | $99/mo |
| Team | $149/mo |
| Enterprise | Contact sales |
Frequently asked
What does Formstack lack compared with BlockSurvey?
Unlimited forms, Conditional logic, File uploads, Signature collection, Custom domain, Webhooks — 6 of the 7 compared capabilities.
When were these prices checked?
BlockSurvey: 2026-10-26; Formstack: 2026-10-26 — on the official pricing pages.
Who switched
Anonymous: no account, no email, no IP stored. Reports are shown once a switch has 3 or more and never change ranking or order — alternatives are computed from prices and capabilities only.
Sources & freshness
- https://blocksurvey.io/pricing (official_pricing, checked 2026-10-26)
- Formstack data last verified 2026-10-26