Softwr

Cybersecurity · head to head

Sardine vs Square

Sardine logo

Sardine

Cybersecurity

Device intelligence and behaviour biometrics for fraud and compliance

From
On request
Rated
-
Full reviewWebsite
Square logo

Square

E-Commerce

Powering the economy

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Square has a free tier, so it costs nothing to try first.
  • Each has a real cost: Sardine signal quality depends on the SDK being embedded in your own web and mobile clients, so fraud improvements become dependent on your app release cycle and any coverage gap is a blind spot.; Square plus plan pricing not specified in documentation
  • They diverge on capability: Sardine covers Device intelligence, Square covers Payment processing.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Sardine and Square actually diverge.

Attributes where Sardine and Square differ
AttributeSardineSquare
Starting priceOn requestFree
Pricing modelquotefreemium
Free tierNoYes
PlatformsWeb, iOS, AndroidPOS (Mobile app), Web
CategoryCybersecurityE-Commerce
FoundedUnknown2009

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 Sardine

  • Device intelligence
  • Behaviour biometrics
  • Scam detection
  • Onboarding risk scoring
  • AML transaction monitoring
  • Dispute and chargeback handling
  • Rules editor

Only in Square

  • Payment processing
  • Point of sale
  • Invoicing
  • Payroll
  • Banking
  • QuickBooks
  • WooCommerce
  • Wix

What people use each for

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

Sardine

  • A neobank losing money to authorised push payment scams where the customer genuinely approved the transfernot Square
  • A crypto exchange trying to detect accounts being operated by remote access rather than by their ownernot Square
  • A fintech seeing synthetic identity signups that pass document verification but share device characteristicsnot Square
  • A lender wanting first party fraud signals at application time that a credit bureau file does not containnot Square

Square

  • Accept payments with all-in-one POS applicationnot Sardine
  • Online ordering and basic website creationnot Sardine
  • Invoicing and appointment bookingnot Sardine
  • Staff scheduling and loyalty programmesnot Sardine

Where each one falls short

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

Sardine

  • Signal quality depends on the SDK being embedded in your own web and mobile clients, so fraud improvements become dependent on your app release cycle and any coverage gap is a blind spot.
  • Behavioural and device telemetry collection needs a documented lawful basis under GDPR, and EU privacy reviews frequently delay rollouts that were scoped as engineering work.
  • Pricing is per session or per active user, so a consumer product with many low value sessions pays in proportion to traffic rather than to fraud exposure.
  • As a younger private company it lacks the enforcement-tested audit history that a bank examiner expects, which makes it a harder sell inside a regulated bank than inside a fintech.
  • It is strongest on session-time signals and weaker as a system of record for long horizon AML typologies, so larger institutions end up running it alongside a traditional monitoring platform rather than instead of one.

Square

  • Plus plan pricing not specified in documentation
  • Processing fees differ by tier but exact rates not detailed
  • Free plan pricing mentioned but specific features for Plus unclear
  • Text marketing charged at 3¢ per message after first 500 included

Pricing, plan by plan

Sardine

On request
  • Sardine$undefined/year
    • Priced per user session or per monthly active user
    • Annual contract with volume commitment
    • SDK for web, iOS and Android

Square

Free
  • FreeFree
    • Accept payments with all-in-one POS app
    • Online site builder (ordering profiles, basic websites, online stores, booking sites)
    • Item library and inventory tracking
  • Plus$null/mo
    • All Free plan features
    • Advanced POS features for food, retail, and appointments
    • Lower processing fees on card transactions

Which should you pick?

Choose Sardine if

  • You need device intelligence.
  • You work on Web, iOS, Android.
  • You also want behaviour biometrics.
Sardine review

Choose Square if

  • You need payment processing.
  • You want to start without paying.
  • You work on POS (Mobile app), Web.
  • You also want point of sale.
Square review

Questions people ask

Is Sardine or Square better?
Neither clearly leads. Sardine starts at On request and Square at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Sardine or Square?
Square has a free tier; the other does not. Paid plans start at On request for Sardine and Free for Square.
Does Sardine or Square run on more platforms?
Sardine runs on Web, iOS, Android. Square runs on POS (Mobile app), Web.
Can I use Square for free?
Yes. Square has a free tier, so you can try it without paying. Sardine starts at On request.
What is Sardine best used for?
Sardine is most often used for a neobank losing money to authorised push payment scams where the customer genuinely approved the transfer, a crypto exchange trying to detect accounts being operated by remote access rather than by their owner, a fintech seeing synthetic identity signups that pass document verification but share device characteristics, a lender wanting first party fraud signals at application time that a credit bureau file does not contain. Of those, a neobank losing money to authorised push payment scams where the customer genuinely approved the transfer and a crypto exchange trying to detect accounts being operated by remote access rather than by their owner are not what Square is typically brought in for.
What can Sardine do that Square cannot?
Sardine covers Device intelligence, Behaviour biometrics, Scam detection, Onboarding risk scoring. Square covers Payment processing, Point of sale, Invoicing, Payroll.

Answered from the vendors’ own pages

Sardine: Does Sardine do document verification?

It focuses on device, behavioural and transaction signals, and integrates identity verification providers rather than being one. Treat it as complementary to a KYC vendor.

Square: Does Square offer a free plan?

Yes, Square's free plan includes an all-in-one POS app, online site builder, item library and inventory tracking, invoicing, appointment scheduling, staff calendars, and checking and savings account access. No subscription fees are charged.

Source
Sardine: What does it need from us to work?

An SDK in your web and mobile applications plus transaction feeds. Without the client side collector you lose the signals that differentiate it.

Square: What does Square Plus add compared to the free plan?

Square Plus adds advanced POS features for food and retail, lower processing fees on card transactions, custom loyalty programs, unlimited email marketing campaigns, text messaging, and staff scheduling and attendance tracking.

Source
Sardine: Is pricing published?

No. It is quoted, typically per session or per monthly active user with an annual volume commitment.

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