Fillout vs. Formstack: Which Form Builder Is Better? [2026]

Comparing Fillout and Formstack? Both are serious platforms—but they come from different eras with different economics. One gives its best features away cheaply; the other gates them behind enterprise tiers.

Fillout is a modern, AI-assisted form platform: 1,000 free responses/month with unlimited forms and seats, two-way record-level sync with Airtable, Notion, HubSpot, Salesforce, and Google Sheets—and a $75/month Business tier that bundles unlimited responses, analytics, custom domains, and partial submissions. Formstack is the enterprise incumbent: a workflow platform with approval routing, document generation, eSignatures, offline collection, and a native Salesforce app—no free plan, an $83/month entry floor, and those famous features waiting at $250/month.

In this Fillout vs. Formstack comparison, we’ll walk through design, features, data analysis, integrations, support, and pricing—so you can choose the right tool for the job.

Short on time? Here’s a quick look at how Fillout and Formstack stack up.

Fillout is one of the most polished modern editors available: fast, AI-assisted, and flexible about layout—one-question-per-screen flows or traditional multi-field pages, switchable at will. Custom fonts, favicon, and CSS arrive at Pro ($40/mo), with a custom domain at Business ($75/mo).

Formstack offers a capable drag-and-drop builder with themes—but traditional layouts, with no one-question-at-a-time mode. Its design energy flows into enterprise functionality: multi-page forms, save-and-resume, and workflow branding. A Formstack form looks professional; a Fillout form can look like your brand, on your domain, by its second tier.

In one line: Fillout is the more modern form designer; Formstack is the more established workflow builder. Neither leads with respondent-facing polish.

Fillout offers the full modern logic toolkit: conditional show/hide, multi-condition branching, calculations, auto-scored quizzes, and multi-page flows. Formstack offers solid conditional logic and calculating fields geared toward orders, quotes, and approval-style processes. Both handle sophisticated branching; Fillout’s is packaged with layout flexibility, Formstack’s with workflow routing.

Here’s the capability contrast that defines the matchup. Fillout connects natively and two-way to Airtable, Notion, HubSpot, Salesforce, and Google Sheets: forms prefill from existing records, create new ones, and update them on submit. For teams running operations out of Airtable or Notion, Fillout becomes the front door to their data.

Formstack’s data story is integration breadth—300+ integrations, one of the deepest catalogs anywhere—plus a 100% native Salesforce app on a dedicated custom-priced plan, where forms live inside Salesforce itself. Fillout syncs with Salesforce through its integration layer; Formstack can live inside it. If Salesforce is your system of record and budget is enterprise-grade, Formstack’s dedicated plan is the deeper path. If your stack is modern and multi-tool, Fillout’s two-way sync is purpose-built.

Formstack’s famous features are tier-gated: the Forms plan ($83/mo) covers forms, logic, payments, and partial submissions—but eSignatures, document generation, and approval routing wait for Suite ($250/mo), with HIPAA as an add-on until the custom plans.

Fillout bundles e-signature fields from Starter ($15/mo), Stripe payments from the free plan, native scheduling, PDF generation, and login-gated forms from Starter. No approval routing or document-generation suite—but the essentials arrive at a fraction of Formstack’s ladder. If your forms need signatures and documents occasionally, Fillout includes them cheaply; if they are your document workflow, Formstack’s Suite is the real product.

Fillout captures partial submissions on its Business plan ($75/mo). Formstack offers partial submissions and respondent save-and-resume—both genuinely useful for lead recovery—but only from its $83/month floor, with no free plan to evaluate them on. One platform gates the feature at $75; the other gates it at $83 plus a trial period.

Formstack supports offline data collection—genuinely valuable for field work, events, and constrained environments. Fillout doesn’t offer an equivalent. If your respondents are sometimes offline, this row matters.

Both embed on any website and work as standalone links. Fillout’s white-label path is self-serve and complete: branding removal at Pro ($40/mo), custom domain at Business ($75/mo). Formstack’s custom domains are plan-dependent, with branding and domain controls living deeper in its enterprise tiers.

Formstack offers HIPAA as an add-on on Forms/Suite and includes it on its custom Salesforce and Enterprise plans, with PCI-compliant payment fields—an enterprise compliance posture backed by Professional Services. Fillout advertises SOC 2 compliance with HIPAA/BAA and SSO reserved for Enterprise. If regulated data is central, both have paths—verify the specifics and add-on costs with each vendor before committing.

A form is only as valuable as the insights you can extract from it.

Fillout’s form analytics arrive at Business ($75/mo): views, completion rates, and drop-off questions—visibility into exactly where respondents abandon.

Formstack provides submission analytics and data routing—solid operational visibility into what arrived and where it went, oriented toward workflow management rather than respondent-funnel optimization.

In one line: Fillout shows you the funnel at its top self-serve tier; Formstack shows you the pipeline.

Fillout’s integration story is depth-first: native, two-way connections to Airtable, Notion, HubSpot, Salesforce, and Google Sheets, plus Zapier and Make for the long tail.

Formstack advertises 300+ integrations—among the deepest catalogs in the category—plus its companion Documents and Sign products and the native Salesforce app. Fillout’s doors open in both directions; Formstack has more doors, and one of them leads inside Salesforce.

Fillout offers documentation and responsive support, with priority support on Business. Formstack provides a help center with email support at entry level, priority support and onboarding on select plans, and a Professional Services team that builds forms and workflows for customers. Formstack’s support ceiling is higher—and priced accordingly.

The economics here are the most lopsided in any Formstack matchup.

Fillout meters responses—generously. Its plans look like this:

• Free — $0: unlimited forms, unlimited seats, 1,000 responses/month, Stripe payments, scheduling, and file uploads included
• Starter — $15/mo ($180 billed annually): 2,000 responses/month, all question types, custom endings, login forms, redirect on completion
• Pro — $40/mo ($480 billed annually): 5,000 responses/month, remove all branding, custom fonts & favicon, custom CSS, custom share links
• Business — $75/mo ($900 billed annually): unlimited responses, form analytics, custom domain, custom code, partial submissions, priority support

Formstack meters tiers. Its plans look like this:

• Forms — $83/mo annual ($99/mo monthly): online forms, logic, payments, partial submissions, 300+ integrations; response caps per form; no eSignatures, documents, or approvals
• Suite — $250/mo annual ($299/mo monthly): adds approval routing, document generation, and eSignatures; HIPAA as add-on
• Salesforce / Enterprise — custom: native Salesforce forms, included HIPAA, dedicated CSM

Formstack offers a free trial but no permanent free plan.

Put simply:

• Formstack’s floor costs more than Fillout’s ceiling. $83/month buys 1,000 responses per form with no eSignatures; $75/month buys unlimited responses, analytics, a custom domain, and partial submissions.
• Fillout has a free plan; Formstack has a trial. 1,000 responses/month at $0 versus nothing permanent.
• E-signatures: $15/mo vs. $250/mo. Fillout’s arrive at Starter; Formstack’s at Suite—a 16× difference for a comparable capability.
• What Formstack’s higher prices buy: approval workflows, a document-generation suite, offline collection, 300+ integrations, the native Salesforce app, and Professional Services. If those are your requirements, the price is the price.
• Seats: Fillout includes unlimited on every plan; Formstack’s collaboration is plan-dependent.

The deeper difference is what each company bets on. Fillout bets that modern capabilities at accessible prices win the mid-market. Formstack bets that enterprise workflow depth—and the budgets that need it—justify the ladder.

• Free plan—1,000 responses/month, unlimited forms and seats vs. a trial
• The ceiling-vs-floor math—$75/mo Business (unlimited responses, analytics, domain, partial submissions) vs. Formstack’s $83/mo entry
• E-signature pricing—Starter ($15/mo) vs. Suite ($250/mo)
• Two-way database sync—native record-level connections across a modern stack
• Unlimited seats on every plan
• Custom domain at self-serve pricing—$75/mo, plan-dependent on Formstack
• Native scheduling, PDF generation, and login-gated forms
• Modern, flexible editor with AI assistance
• Analytics—drop-off visibility at Business

• Approval workflows—routing submissions for review; Fillout has no equivalent
• Document generation suite—auto-generated documents from form data
• Native Salesforce app—Salesforce-native forms on a dedicated plan
• Offline data collection—field and events capability Fillout lacks
• Save and resume—respondent-initiated saves alongside partial submissions
• Integration count—300+ vs. Fillout’s focused catalog
• PCI-compliant payment fields
• Professional Services—a team that builds for you
• Enterprise compliance posture—HIPAA included on custom plans with a dedicated CSM

• Both meter usage. Fillout caps monthly responses until Business; Formstack caps forms, per-form responses, and features by tier—with no free plan at all. Neither holds over-limit respondents rather than rejecting them.
• Neither makes white-labeling cheap. Fillout splits it across Pro ($40/mo) and Business ($75/mo); Formstack’s domain and branding controls are plan-dependent and live in enterprise tiers.
• Approval workflows exist on only one side—Formstack’s—at $250/mo. Neither offers them affordably.
• Conversational UX is not the default on either. Fillout supports one-question-per-screen flows; Formstack is traditional throughout.
• HIPAA is gated on both—Fillout at Enterprise, Formstack as an add-on or custom-plan inclusion.

Here’s the cleanest way to decide:

Fillout is the better platform value. Formstack is the deeper workflow incumbent.

• Choose Fillout when your team runs on Airtable, Notion, HubSpot, or Salesforce and wants forms that read and write those records—or when you want maximum capability per dollar, with unlimited responses at $75/mo self-serve.
• Choose Formstack when your forms are enterprise workflow inputs: approvals, document generation, Salesforce-native capture, offline collection, or compliance requirements backed by Professional Services—with the budget to match.

For everything in between—a conversational experience without response caps, white-labeling and lead recovery bundled at one price, or a genuinely unlimited free plan—the comparison above has a gap.

It depends on the job. Fillout is the better platform value—1,000 free responses/month, two-way database sync, and a $75/month top tier with unlimited responses, analytics, and partial submissions. Formstack is the deeper workflow incumbent—approvals, document generation, eSignatures, offline collection, and a native Salesforce app—but with no free plan, an $83/month floor, and its enterprise features at $250/month. For conversational forms without response caps, Formware ($29.99/month Pro) is a strong middle path.

Significantly. Formstack’s floor ($83/month Forms) costs more than Fillout’s ceiling ($75/month Business)—and Fillout’s ceiling includes unlimited responses, analytics, a custom domain, and partial submissions, while Formstack’s floor caps responses per form and excludes eSignatures, documents, and approvals. Fillout also offers a permanent free plan; Formstack offers only a trial.

Both, differently. Fillout offers native two-way sync with Salesforce through its integration layer—forms can read and write records. Formstack offers a dedicated, custom-priced Salesforce plan with a 100% native app where forms live inside Salesforce itself, plus 300+ integrations. If Salesforce-native is a hard requirement, Formstack’s dedicated plan is deeper; if Salesforce is one tool among several, Fillout covers it at self-serve pricing. Formware also connects to CRMs through webhooks and integrations on its free plan.

Both offer them—Fillout on Business ($75/mo), Formstack from its Forms plan ($83/mo, which also adds respondent save-and-resume). The difference is context: Fillout’s arrive at its top self-serve tier alongside unlimited responses; Formstack’s require its $83/month floor with no free plan. Formware includes automatic partial submission capture on Pro at $29.99/month ($299/year), bundled with white-labeling and custom domains.

Both, at different points. Formstack offers HIPAA as an add-on on Forms/Suite and includes it on its custom Salesforce and Enterprise plans. Fillout reserves HIPAA/BAA for Enterprise contracts, with SOC 2 on standard tiers. If regulated health data is central, verify the specific requirements and add-on costs with each vendor before committing.

Fillout is the strongest on modern value and database sync; Formware is the strongest on conversational UX and free-plan generosity. Formware offers one-question-at-a-time forms as the default, unlimited forms, questions, and responses on the free plan, and Pro at $29.99/month with custom domains, white-labeling, partial submissions, and unlimited team members. See our full Formware vs. Formstack comparison.

Pricing and plan details were verified at the time of writing and may change. Check Fillout’s and Formstack’s sites for current pricing.