Softwr

Marketing · head to head

Convert vs Fillout

Convert logo

Convert

Marketing

A/B testing platform for enterprises

From
Free
Free plan
Yes
Full reviewWebsite
Fillout logo

Fillout

Surveys

Form builder that reads and writes records in Airtable, Notion, HubSpot and Salesforce, with unlimited seats on every plan including the free one

From
Free
Free plan
Yes
Full reviewWebsite

The short version

  • Each has a real cost: Convert pricing is driven by monthly tested users, starting at $399 per month for 100,000 monthly tested users on Growth and $599 on Pro; Fillout the Business plan is marketed with unlimited responses but the fair use policy names thresholds of 30,000 submissions a month, 250,000 in total, 500 forms per account and 50 GB of uploads a month, above which the vendor may limit or suspend features, so unlimited means unmetered rather than uncapped.
  • They diverge on capability: Convert covers A/B testing, Fillout covers Unlimited seats and forms.
  • Prices and features above were last checked on 2 September 2026.

Where they differ

Only the attributes on which Convert and Fillout actually diverge.

Attributes where Convert and Fillout differ
AttributeConvertFillout
Pricing modelsubscriptionPer month by response count
PlatformsWebWeb, API
CategoryMarketingSurveys
Founded2012Unknown

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Convert

  • A/B testing
  • Multivariate testing
  • Analytics
  • API access
  • Google Analytics
  • SSL encryption
  • Cloud deployment
  • Web support

Only in Fillout

  • Unlimited seats and forms
  • Database read and write
  • Soft response limits
  • Conditional logic and calculations
  • EU hosting
  • REST API and webhooks

What people use each for

The jobs each tool is most often brought in to do.

Convert

  • A/B and multivariate testing for conversion optimizationnot Fillout
  • Full-stack experimentation on web and mobilenot Fillout
  • Sequential testing and statistical confidence trackingnot Fillout

Fillout

  • A team already running on Airtable or Notion that wants forms which update existing records rather than appending new rowsnot Convert
  • An organisation with many occasional form builders, where per-seat pricing elsewhere would cost more than the forms are worthnot Convert
  • Replacing a survey tool, a scheduling tool and a payment link with one form that does all threenot Convert
  • Public forms that must keep collecting through an unexpected traffic spike rather than shutting off at a quotanot Convert

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Convert

  • Pricing is driven by monthly tested users, starting at $399 per month for 100,000 monthly tested users on Growth and $599 on Pro
  • Single Sign-On requires the Pro plan at $599 per month
  • Multivariate testing, multi-page testing, full stack and feature flags, sequential testing and raw test data export are all withheld from the Growth plan
  • Phone support, change history and guided onboarding require Pro
  • The advertised $299 and $420 per month rates require paying the full year up front at $3,588 or $5,040
  • The Enterprise plan is price on request, is only available as an annual plan, and its data segregation feature carries additional costs
  • Listed prices exclude VAT, GST and other taxes, which are added at checkout
  • Above 5 million monthly tested users there is no published rate

Fillout

  • The Business plan is marketed with unlimited responses but the fair use policy names thresholds of 30,000 submissions a month, 250,000 in total, 500 forms per account and 50 GB of uploads a month, above which the vendor may limit or suspend features, so unlimited means unmetered rather than uncapped.
  • EU data residency begins on the Team plan at 250 USD per month, more than three times the Business price, and is not applied automatically; you must upgrade and then raise a support request to be moved.
  • The Team plan is hidden behind a secondary tab that does not render without interaction, so buyers reading the pricing page see Business at 75 USD as the top self-serve tier and only discover the 250 USD step when they ask for single sign-on or EU hosting.
  • The enterprise marketing page lists hosting in the United States, EU, United Kingdom, Australia and Canada, but the security documentation and subprocessor list name only the United States and the EU, so three of those five regions should be confirmed in writing before they are relied on.
  • The vendor is SOC 2 Type 2 but claims neither ISO 27001 nor HIPAA anywhere in its documentation, and it is angel-funded with no disclosed institutional round while the parent company now trades as Zite and ships a separate AI application builder.

Pricing, plan by plan

Convert

Free
  • Growth$399/month
  • Pro$599/month
  • Enterprise$undefined/mo

Fillout

Free
  • FreeFree
    • 1,000 responses per month
    • Unlimited forms and unlimited seats
    • 20 MB per file upload
  • Starter$15/month
    • 180 USD per year billed annually, a stated 20 percent saving on monthly billing
    • 2,000 responses per month
    • Unlimited forms and seats
  • Pro$40/month
    • 480 USD per year billed annually
    • 5,000 responses per month
    • Branding fully removed at this tier
  • Business$75/month
    • 900 USD per year billed annually
    • Marketed as unlimited responses, subject to a fair use threshold near 30,000 per month
    • 1 GB per file upload

Which should you pick?

Choose Convert if

  • You need a/b testing.
  • You want to start without paying.
  • You also want multivariate testing.
Convert review

Choose Fillout if

  • You need unlimited seats and forms.
  • You want to start without paying.
  • You work on Web, API.
  • You also want database read and write.
Fillout review

Questions people ask

Is Convert or Fillout better?
Neither clearly leads. Convert starts at Free and Fillout at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Convert or Fillout?
Convert starts at Free and Fillout at Free.
Does Convert or Fillout run on more platforms?
Convert runs on Web. Fillout runs on Web, API.
Can I use Convert for free?
Both have a free tier, so you can try either at no cost before committing.
What is Convert best used for?
Convert is most often used for a/b and multivariate testing for conversion optimization, full-stack experimentation on web and mobile, sequential testing and statistical confidence tracking. Of those, a/b and multivariate testing for conversion optimization and full-stack experimentation on web and mobile are not what Fillout is typically brought in for.
What can Convert do that Fillout cannot?
Convert covers A/B testing, Multivariate testing, Analytics, API access. Fillout covers Unlimited seats and forms, Database read and write, Soft response limits, Conditional logic and calculations.

Answered from the vendors’ own pages

Convert: What is the starting price for Convert?

The Growth plan starts at $399/month (or $299/month billed annually for 25% savings) with 100K monthly tested users, 5 projects, and 5 active experiences per project.

Source
Fillout: Are seats really unlimited?

Yes. The vendor states there are no per-seat charges on any plan, including Free, and forms are unlimited too. Responses per month is the only meter below the Business tier.

Convert: What is the difference between Growth and Pro plans?

Both cap at 100K tested users/month, but Pro ($599/month or $420/month annual) adds 30 active projects (vs 5), unlimited experiences per project (vs 5), unlimited domains (vs 10), multivariate testing, full-stack testing, sequential testing, and phone support.

Source
Fillout: What happens when I exceed my response quota?

Nothing breaks. Forms keep collecting, and you can upgrade, buy bulk submissions or wait for the monthly reset.

Convert: How much does the Enterprise plan cost?

Enterprise pricing is available 'on request.' It supports 1M+ monthly tested users (12M+ annually), unlimited projects, experiences, and domains, plus dedicated account manager and custom terms.

Source
Fillout: Can I host respondent data in the EU?

Only from the Team plan at 250 USD per month, and only after contacting support to switch. Note that email and payment subprocessors remain in the United States regardless.

Convert: What is the cost to exceed my monthly tested user limit?

Growth overages cost $399 per 100K additional users. Pro/Enterprise overages cost $699 per 250K additional users. Customers can also upgrade mid-cycle at any time.

Source
Fillout: Is the Business plan really unlimited responses?

It is unmetered, not uncapped. The fair use policy names roughly 30,000 submissions a month as the point at which the vendor may intervene, so treat that as the practical ceiling.

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