Formstack is an alternative
to 123FormBuilder
$99/mo (Forms) vs 123FormBuilder Gold at $37/mo — covering 13% of the 3 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.
Gold plan at $37/mo, the cheapest paid plan.
Forms: 99 USD/monthly.
123FormBuilder costs $37/mo on the Gold plan at 1,000 responses/month, 1 seat, monthly billing. Formstack costs $99/mo (Forms plan), which is not cheaper than 123FormBuilder Gold at $37/mo in this scenario.
Capability comparison
Formstack covers 13% of the 3 capabilities compared against 123FormBuilder. ✓ native · ◐ via integration · ✗ not found.
| Capability | Formstack | 123FormBuilder |
|---|---|---|
| Conditional logic | ✗ | ✓ |
| File uploads | ✗ | ✓ |
| Signature collection | ↑ Suite | ✓ |
What you give up
Capabilities 123FormBuilder has that Formstack lacks.
- 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.
Price at your volume
The same comparison recomputed at three sizes. Plan caps change who is cheapest.
| Usage | 123FormBuilder | Formstack |
|---|---|---|
| 100 responses/month | $37/moGold | $99/mocosts moreForms |
| 1,000 responses/month | $37/moGold | $99/mocosts moreForms |
| 10,000 responses/month | $49/moPlatinum | $99/mocosts moreForms |
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 |
| Basic | Free |
| Gold | $37/mo |
| Platinum | $49/mo |
| Diamond | $99/mo |
| Enterprise | $225/mo (billed yearly) |
Frequently asked
What does Formstack lack compared with 123FormBuilder?
Unlimited submissions, Unlimited forms, Conditional logic, File uploads, Custom domain, Signature collection, Webhooks — 7 of the 3 compared capabilities.
When were these prices checked?
123FormBuilder: 2026-10-29; 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://www.123formbuilder.com/signup.html (official_pricing, checked 2026-10-29)
- https://www.123formbuilder.com/pricing/ (feature_page, checked 2026-10-29)
- Formstack data last verified 2026-10-26