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Surveys · head to head

Fillout vs Kissmetrics

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
Kissmetrics logo

Kissmetrics

Marketing

Customer analytics and behavioral data

From
Free
Free plan
Yes
Full reviewWebsite

The short version

  • Each has a real cost: 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.; Kissmetrics overages are added automatically to the next invoice rather than blocked, so exceeding an event allowance bills without a decision point
  • They diverge on capability: Fillout covers Unlimited seats and forms, Kissmetrics covers Customer analytics.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Fillout and Kissmetrics actually diverge.

Attributes where Fillout and Kissmetrics differ
AttributeFilloutKissmetrics
Pricing modelPer month by response countfreemium
PlatformsWeb, APIWeb
CategorySurveysMarketing
FoundedUnknown2009

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 Fillout

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

Only in Kissmetrics

  • Customer analytics
  • Behavioral tracking
  • Cohort analysis
  • Funnel analysis
  • Salesforce
  • GDPR
  • Cloud deployment
  • Web support

What people use each for

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

Fillout

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

Kissmetrics

  • Product analytics and user behavior trackingnot Fillout
  • Event-based analyticsnot Fillout
  • Data integration and reportingnot Fillout

Where each one falls short

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

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.

Kissmetrics

  • Overages are added automatically to the next invoice rather than blocked, so exceeding an event allowance bills without a decision point
  • The free plan allows 100,000 events a month
  • Per event rates fall with volume, from $0.20 per 1,000 events on Growth to $0.10 on Gold, so smaller customers pay double per event
  • The vendor states Growth, Silver and Gold are the identical product, so the paid tiers differ only in unit price and volume
  • Anything above 5 million events is custom priced

Pricing, plan by plan

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

Kissmetrics

Free
  • FreeFree
    • 100,000 events/month
    • Autocapture tracking
    • AI chat
  • Growth$99/month
    • Starting at 500k events
    • $0.20 per 1k events
    • Populations
  • Silver$null/month
    • $0.15 per 1k events
    • All Growth features
  • Gold$null/month
    • $0.10 per 1k events (at 5M+ events)
    • All Growth features

Which should you pick?

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

Choose Kissmetrics if

  • You need customer analytics.
  • You want to start without paying.
  • You also want behavioral tracking.
Kissmetrics review

Questions people ask

Is Fillout or Kissmetrics better?
Neither clearly leads. Fillout starts at Free and Kissmetrics at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Fillout or Kissmetrics?
Fillout starts at Free and Kissmetrics at Free.
Does Fillout or Kissmetrics run on more platforms?
Fillout runs on Web, API. Kissmetrics runs on Web.
Can I use Fillout for free?
Both have a free tier, so you can try either at no cost before committing.
What is Fillout best used for?
Fillout is most often used for a team already running on airtable or notion that wants forms which update existing records rather than appending new rows, an organisation with many occasional form builders, where per-seat pricing elsewhere would cost more than the forms are worth, replacing a survey tool, a scheduling tool and a payment link with one form that does all three, public forms that must keep collecting through an unexpected traffic spike rather than shutting off at a quota. Of those, a team already running on airtable or notion that wants forms which update existing records rather than appending new rows and an organisation with many occasional form builders, where per-seat pricing elsewhere would cost more than the forms are worth are not what Kissmetrics is typically brought in for.
What can Fillout do that Kissmetrics cannot?
Fillout covers Unlimited seats and forms, Database read and write, Soft response limits, Conditional logic and calculations. Kissmetrics covers Customer analytics, Behavioral tracking, Cohort analysis, Funnel analysis.

Answered from the vendors’ own pages

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.

Kissmetrics: Does KISSmetrics have a free plan?

Yes, KISSmetrics offers a free plan with 100,000 events/month including autocapture tracking, dashboards, and core reports. No card required.

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.

Kissmetrics: What does KISSmetrics charge for paid plans?

Growth plan starts at $99/month for 500k events, charging $0.20 per additional 1k events. Silver and Gold tiers offer lower per-event rates at higher volumes.

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.

Kissmetrics: Does KISSmetrics offer annual discounts?

Yes, annual plans receive 20% off monthly rates. Overage charges are automatically added to the next invoice.

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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