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Developer Tools · head to head

ConfigCat vs Sumsub

ConfigCat logo

ConfigCat

Developer Tools

Feature flag service priced per flag and environment with unlimited seats and unlimited monthly active users

From
Free
Free plan
Yes
Full reviewWebsite
Sumsub logo

Sumsub

Cybersecurity

Identity verification and AML screening priced per verification

From
$1.35/verification
Free plan
No
Full reviewWebsite

The short version

  • Only ConfigCat has a free tier, so it costs nothing to try first.
  • Each has a real cost: ConfigCat there is no experimentation or statistical analysis engine, so teams wanting real A/B tests with significance testing must buy and integrate a separate analytics or experimentation product.; Sumsub the published per-verification rate is undercut by a monthly minimum of 149 or 299 dollars, so low volume businesses pay a much higher effective rate than the headline suggests.
  • They diverge on capability: ConfigCat covers Feature flags and configuration, Sumsub covers Document verification.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which ConfigCat and Sumsub actually diverge.

Attributes where ConfigCat and Sumsub differ
AttributeConfigCatSumsub
Starting priceFree$1.35/verification
Pricing modelPer month by feature flag and environment countPer verification
Free tierYesNo
PlatformsWeb, API, iOS, Android, Node.js, .NET, Java, Python, GoWeb, iOS, Android
CategoryDeveloper ToolsCybersecurity

Identical on both: 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 ConfigCat

  • Feature flags and configuration
  • Percentage rollouts
  • Targeting rules and segments
  • Unlimited seats
  • Global CDN delivery
  • Audit log
  • Public API and webhooks
  • SDKs across languages

Only in Sumsub

  • Document verification
  • AML screening
  • KYB verification
  • No-code flow builder
  • Transaction monitoring
  • Travel Rule
  • Fraud and duplicate detection

What people use each for

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

ConfigCat

  • A consumer or mobile app with millions of users where per-MAU flag pricing would cost more than the flags are worthnot Sumsub
  • A team that wants every engineer, product manager and support agent to have a login without paying per seatnot Sumsub
  • Decoupling deployment from release with percentage rollouts and a kill switch, without buying an experimentation platformnot Sumsub
  • A small team that needs ten flags permanently and can run indefinitely on the free tiernot Sumsub

Sumsub

  • A crypto exchange needing KYC plus Travel Rule handling under one contractnot ConfigCat
  • A gambling operator entering several European markets and needing document coverage without a separate vendor per countrynot ConfigCat
  • A fintech that wants a published price it can model in a business case before speaking to a salespersonnot ConfigCat
  • A marketplace verifying both individual sellers and the companies behind them without buying two productsnot ConfigCat

Where each one falls short

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

ConfigCat

  • There is no experimentation or statistical analysis engine, so teams wanting real A/B tests with significance testing must buy and integrate a separate analytics or experimentation product.
  • Pricing by flag count punishes exactly the hygiene you want: the Pro tier caps at 100 flags, so teams that do not aggressively retire stale flags are pushed to the 325 dollar Smart tier for housekeeping reasons rather than growth.
  • The free tier allows only 2 environments, which does not cover the common development, staging and production split, so almost any real deployment starts on a paid plan.
  • It is a smaller vendor than the category incumbents, so enterprise procurement teams will find less depth in compliance attestations, contractual terms and reference architecture than LaunchDarkly offers.
  • Flag evaluation relies on SDK-side caching of a CDN-delivered config, which is fast but means propagation of a change is eventually consistent rather than instant, something to understand before relying on it as an emergency kill switch.

Sumsub

  • The published per-verification rate is undercut by a monthly minimum of 149 or 299 dollars, so low volume businesses pay a much higher effective rate than the headline suggests.
  • You are billed per verification attempt in most configurations, meaning applicant drop-off and resubmissions cost money without producing a customer.
  • Pass rates and document support vary noticeably by country, and a market that works well in Europe can produce materially worse rejection rates in parts of Africa and South East Asia.
  • The AML screening tier bundles list coverage that large institutions would normally buy separately and tune, giving less control over match thresholds than a dedicated screening vendor.
  • The company originated in Russia before restructuring to a UK entity, and some financial institutions still raise that history in vendor risk review, which can slow or block procurement at conservative banks.

Pricing, plan by plan

ConfigCat

Free
  • Forever FreeFree
    • 10 feature flags
    • 2 environments and 2 products
    • 2 segments
  • Pro$110/month
    • 100 feature flags
    • 3 environments and 3 products
    • Unlimited seats and MAUs
  • Smart$325/month
    • Unlimited feature flags
    • Unlimited environments, products and segments
    • Unlimited seats and MAUs
  • Enterprise$900/month
    • Everything in Smart
    • Enterprise support and controls
    • Unlimited everything on flag counts

Sumsub

$1.35/verification
  • Basic$1.35/verification
    • 149 USD minimum monthly spend
    • Document verification and liveness
    • No-code flow builder
  • Compliance$1.85/verification
    • 299 USD minimum monthly spend
    • Everything in Basic
    • AML sanctions and PEP screening
  • Enterprise$undefined/year
    • Negotiated volume rate
    • Custom jurisdictions and languages
    • Dedicated support

Which should you pick?

Choose ConfigCat if

  • You need feature flags and configuration.
  • You want to start without paying.
  • You work on Web, API, iOS, Android, Node.js, .NET, Java, Python, Go.
  • You also want percentage rollouts.
ConfigCat review

Choose Sumsub if

  • You need document verification.
  • You work on Web, iOS, Android.
  • You also want aml screening.
Sumsub review

Questions people ask

Is ConfigCat or Sumsub better?
Neither clearly leads. ConfigCat starts at Free and Sumsub at $1.35/verification, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, ConfigCat or Sumsub?
ConfigCat has a free tier; the other does not. Paid plans start at Free for ConfigCat and $1.35/verification for Sumsub.
Does ConfigCat or Sumsub run on more platforms?
ConfigCat runs on Web, API, iOS, Android, Node.js, .NET, Java, Python, Go. Sumsub runs on Web, iOS, Android.
Can I use ConfigCat for free?
Yes. ConfigCat has a free tier, so you can try it without paying. Sumsub starts at $1.35/verification.
What is ConfigCat best used for?
ConfigCat is most often used for a consumer or mobile app with millions of users where per-mau flag pricing would cost more than the flags are worth, a team that wants every engineer, product manager and support agent to have a login without paying per seat, decoupling deployment from release with percentage rollouts and a kill switch, without buying an experimentation platform, a small team that needs ten flags permanently and can run indefinitely on the free tier. Of those, a consumer or mobile app with millions of users where per-mau flag pricing would cost more than the flags are worth and a team that wants every engineer, product manager and support agent to have a login without paying per seat are not what Sumsub is typically brought in for.
What can ConfigCat do that Sumsub cannot?
ConfigCat covers Feature flags and configuration, Percentage rollouts, Targeting rules and segments, Unlimited seats. Sumsub covers Document verification, AML screening, KYB verification, No-code flow builder.

Answered from the vendors’ own pages

ConfigCat: How is ConfigCat priced?

By feature flag, environment and product count. Seats, monthly active users and flag reads are unlimited on every plan.

Sumsub: What does a verification actually cost?

1.35 USD on Basic and 1.85 USD on Compliance, but with 149 and 299 USD monthly minimums respectively. Below roughly 110 or 160 checks a month you are paying the minimum, not the rate.

ConfigCat: Is the free tier usable?

For small projects yes, but at 10 flags and 2 environments it will not cover a dev, staging and production setup.

Sumsub: Do failed verifications get charged?

Attempts are generally billable, so a poor onboarding funnel raises your bill. Confirm the exact resubmission policy in your contract.

ConfigCat: Can it run A/B tests?

It can split traffic, but there is no statistics engine. You need a separate analytics tool to decide a winner.

Sumsub: Does it cover business verification?

Yes, KYB with company registry lookups and beneficial owner resolution is part of the platform rather than a separate product.

ConfigCat: How fast does a flag change take effect?

SDKs poll and cache, so changes propagate on the polling interval rather than instantly.

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