Two popular form builders compared on the same 25-row feature matrix and pricing, with FormBuilder shown as a third column so you can see another option to consider.
Overview
Formstack started as an online form builder in 2006 and has grown into a workflow suite: Formstack Forms (the builder), Formstack Documents (merge submissions into PDFs, Word files and contracts), and Formstack Sign (e-signature). The pitch is that one platform can take a request from intake form to generated document to signed agreement without code, which is why it sells mainly to operations, HR, healthcare and higher-ed teams.
The form builder itself is capable rather than flashy: drag-and-drop fields, conditional logic, multi-page forms, calculations, save-and-resume, payments (Stripe, PayPal, Authorize.net and others), workflows with approvals, and 300+ integrations. Its Salesforce apps are a genuine differentiator — forms that read and write Salesforce records natively and can live inside Experience Cloud — and it offers HIPAA compliance, PCI and SOC 2 for regulated buyers.
MightyForms is a drag-and-drop online form builder aimed at small businesses that needed lead-capture, intake, order and registration forms without writing code. Its signature idea was that a form should never lose a lead: every keystroke was saved as a partial submission, abandoned forms could be recovered with automated follow-up emails, and respondents could resume where they left off. Stripe and PayPal payments, autoresponders, email/SMS notifications, PDF export and Zapier connectivity rounded out the product.
In May 2026 FormBuilder acquired MightyForms. The MightyForms app remains available at its existing login for current customers, and nothing about existing accounts, forms, submissions or billing has been moved automatically. FormBuilder.com is now the home for the MightyForms public templates and educational resources, and it is where we recommend building new forms.
Pricing
In each vendor's own terms; Formstack checked 2026-08-17, MightyForms checked 2026-08-17. FormBuilder: free plan (5 forms, 100 responses / mo) and Pro at $39 / month or $390 / year.
Feature comparison
25 capabilities across building, design, data workflow and security.
| Feature | FFormstack | MMightyForms | FFormBuilder |
|---|---|---|---|
| Building | |||
| AI form generation from a prompt | PartialAI features rolling out; not the core building flow | No | Yes |
| Drag-and-drop visual builder | Yes | Yes | Yes |
| Template library | YesHundreds, skewed to HR, healthcare, education | YesLibrary now moving to FormBuilder | Yes300+ |
| Conditional logic / branching | Yes | Yes3 rules / form on Free | Yes |
| Multi-page / multi-step forms | Yes | Yes | YesPro |
| Calculations & scoring | Yes | PartialBasic price / quantity calculations | YesCalculation field + auto-graded quizzes |
| File uploads | Yes2 GB on Forms · 10 GB Suite | Yes1 GB / mo transfer on Free | Yes100 MB free · 1 GB Pro |
| Payment collection | YesStripe, PayPal, Authorize.net, Square & more | YesStripe & PayPal, +1% fee | YesStripe — paid to your own account, no platform fee |
| E-signature field | YesSignature field; full e-sign via Formstack Sign | Yes | Yes |
| Design | |||
| Custom themes & branding | YesThemes & CSS | Yes | YesPro |
| Remove vendor badge | YesPaid plans; no free tier | YesPaid plans | YesPro, $39 |
| Custom domain | YesPaid plans | PartialBusiness / Custom | Yes |
| Embed on any site | Yes | Yes | Yes |
| Data & workflow | |||
| Free-plan monthly responses | NoNo free plan; 14-day trial | Partial100 / mo, incl. partials | Partial100 / mo, overflow held |
| Over-limit responses kept (not rejected) | PartialPer-form submission caps; overage handled by upgrade | PartialPartial submissions saved; form stops at plan cap | Yes |
| Email notifications & autoresponders | Yes | YesEmail & SMS autoresponders | Yes |
| Webhooks | Yes | YesVia Zapier / native apps | YesAll plans |
| Zapier / native integrations | Yes300+ native + Zapier; deep Salesforce | YesZapier + "My Apps" natives | Yes6,000+ apps |
| Built-in analytics (views, drop-off) | YesSubmission analytics; conversion kit on higher tiers | YesViews, abandonment, referrer tracking | Yes |
| CSV / spreadsheet export | Yes | YesCSV & PDF | Yes |
| Team workspaces & collaboration | YesExtra builder seats cost more | PartialBusiness plan | Yes |
| Security | |||
| Password-protected forms | Yes | Partial | YesPro |
| HIPAA / BAA | YesAdd-on on Forms/Suite; included Salesforce & Enterprise | No | PartialHIPAA plan coming soon |
| GDPR tooling & DPA | Yes | Partial | Yes |
| SSO / SAML | YesEnterprise | No | PartialEnterprise |
Another option to consider
AI-first form builder with a generous free plan, held (never lost) responses, and 6,000+ integrations. Describe the form you need, the AI drafts it, and you refine it with logic, multi-page layouts, uploads, signatures and Stripe payments. Free plan: 5 forms and 100 responses a month with overflow held, never lost. Pro: $39 / month for 100 forms and 10,000 responses with the badge removed.
Questions
MightyForms's entry paid plan (Starter at $19 / month) is cheaper than Formstack's (Forms at $83 / month (annual, $99 monthly)). Both offer a free plan (2 forms · 100 submissions / mo · 1,000 views / mo · 3 logic rules per form · MightyForms branding) and a 14-day trial respectively. Note the plans differ in limits — see the tables above. FormBuilder Pro, for reference, is $39 / month for 10,000 responses.
Formstack offers a 14-day trial. Prices shown are per month billed annually; monthly billing is roughly 20% higher. Submission limits are per form. No free plan — 14-day free trial of Forms.
MightyForms offers a free plan (2 forms · 100 submissions / mo · 1,000 views / mo · 3 logic rules per form · MightyForms branding). Historical MightyForms plans as listed on mightyforms.com; monthly billing shown, annual billing was discounted ~20%. Stripe/PayPal payments carried a 1% MightyForms fee on top of processor fees. New signups should start on FormBuilder.
Formstack payments: Yes (Stripe, PayPal, Authorize.net, Square & more). MightyForms payments: Yes (Stripe & PayPal, +1% fee). FormBuilder collects Stripe payments to your own account with no platform fee on every plan, including free.
Formstack HIPAA / BAA: Yes (Add-on on Forms/Suite; included Salesforce & Enterprise). MightyForms HIPAA / BAA: No. FormBuilder's HIPAA plan with BAA ($99 / month) is currently rolling out.
Formstack is a no-code workflow platform for mid-size and enterprise teams that bundles forms, document generation and e-signature, with a deep Salesforce integration. MightyForms is the drag-and-drop form builder known for abandoned-form recovery and partial submissions — now part of FormBuilder. Formstack is best for operations, HR and admissions teams that need forms to feed documents, approvals and e-signatures; MightyForms is best for existing MightyForms customers who want to keep using the app they know.
FormBuilder is worth a look if you want an AI generator that drafts forms from a sentence, 100 free responses a month with overflow held rather than lost, Stripe payments with no platform fee, and a flat $39 / month Pro plan for 10,000 responses. See our full FormBuilder vs Formstack and FormBuilder vs MightyForms comparisons.
Last reviewed August 2026. Spotted something out of date? Tell us and we'll fix it.
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