Softwr

Accounting · head to head

Polar vs Silent Eight

Polar logo

Polar

Accounting

Billing and revenue platform for AI and infrastructure companies

From
Free
Rated
-
Full reviewWebsite
Silent Eight logo

Silent Eight

Cybersecurity

AI adjudication of sanctions screening and AML alerts

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only Polar has a free tier, so it costs nothing to try first.
  • Each has a real cost: Polar percentage-based fees higher than some specialized processors for high-volume transactions; Silent Eight automated disposition has to clear model risk governance and a regulator, and the shadow running period before auto-close is permitted can consume most of the first year of the contract.
  • They diverge on capability: Polar covers Usage Billing, Silent Eight covers Alert adjudication.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Polar and Silent Eight actually diverge.

Attributes where Polar and Silent Eight differ
AttributePolarSilent Eight
Starting priceFreeOn request
Pricing modelPercentage of transaction plus per-transaction feequote
Free tierYesNo
PlatformsWeb, APIWeb, Linux
CategoryAccountingCybersecurity

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 Polar

  • Usage Billing
  • Subscriptions
  • Seat Management
  • Prepaid Credits
  • Hosted Checkout
  • Cost Insights
  • Merchant of Record

Only in Silent Eight

  • Alert adjudication
  • Narrative generation
  • Name screening automation
  • Quality assurance
  • Shadow mode
  • Model transparency reporting

What people use each for

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

Polar

  • Billing for token and API call consumption by LLM applicationsnot Silent Eight
  • Managing tiered pricing for infrastructure usage-based servicesnot Silent Eight
  • Handling subscription and usage hybrid modelsnot Silent Eight
  • Monetizing AI APIs with usage metering and creditsnot Silent Eight

Silent Eight

  • A bank whose level one screening team spends most of its time closing obvious false name matchesnot Polar
  • A payments institution with alert volumes growing faster than it can recruit and train analystsnot Polar
  • A compliance function asked by a regulator to demonstrate consistency of alert decisions across offshore teamsnot Polar
  • An institution that has just tightened screening thresholds after an enforcement action and cannot staff the resulting alert increasenot Polar

Where each one falls short

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

Polar

  • Percentage-based fees higher than some specialized processors for high-volume transactions
  • Merchant of record model may not suit companies preferring direct payment control
  • Free Starter tier limited with 5% fees reducing appeal for production use
  • Setup and integration effort required despite API simplicity

Silent Eight

  • Automated disposition has to clear model risk governance and a regulator, and the shadow running period before auto-close is permitted can consume most of the first year of the contract.
  • It does not improve detection, so an institution with a poorly tuned monitoring system automates the handling of bad alerts rather than fixing why they exist.
  • Pricing is tied to alert volume, which means efficiency gains elsewhere that reduce alerts also reduce the vendor bill in a way sales teams structure minimums against.
  • The headcount saving is only realised if the institution actually reduces the analyst pool, and many banks redeploy rather than cut, leaving the business case unrealised on paper.
  • As a mid-sized private vendor serving tier one banks, concentration risk cuts both ways; the loss of one large client materially affects the company, and buyers should ask about financial stability during diligence.

Pricing, plan by plan

Polar

Free
  • StarterFree
    • 5% + $0.50 per transaction
    • Free tier for testing
    • Basic features
  • Pro$20/month
    • 3.8% + $0.40 per transaction
    • Full platform access
    • Cost insights
  • Growth$100/month
    • 3.6% + $0.35 per transaction
    • Priority support
    • Volume benefits
  • Scale$400/month
    • 3.4% + $0.30 per transaction
    • Dedicated support
    • Custom integration

Silent Eight

On request
  • Iris$undefined/year
    • Priced by alert volume adjudicated
    • Deploys against existing screening and monitoring systems
    • Shadow mode evaluation period

Which should you pick?

Choose Polar if

  • You need usage billing.
  • You want to start without paying.
  • You work on Web, API.
  • You also want subscriptions.
Polar review

Choose Silent Eight if

  • You need alert adjudication.
  • You work on Web, Linux.
  • You also want narrative generation.
Silent Eight review

Questions people ask

Is Polar or Silent Eight better?
Neither clearly leads. Polar starts at Free and Silent Eight at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Polar or Silent Eight?
Polar has a free tier; the other does not. Paid plans start at Free for Polar and On request for Silent Eight.
Does Polar or Silent Eight run on more platforms?
Polar runs on Web, API. Silent Eight runs on Web, Linux.
Can I use Polar for free?
Yes. Polar has a free tier, so you can try it without paying. Silent Eight starts at On request.
What is Polar best used for?
Polar is most often used for billing for token and api call consumption by llm applications, managing tiered pricing for infrastructure usage-based services, handling subscription and usage hybrid models, monetizing ai apis with usage metering and credits. Of those, billing for token and api call consumption by llm applications and managing tiered pricing for infrastructure usage-based services are not what Silent Eight is typically brought in for.
What can Polar do that Silent Eight cannot?
Polar covers Usage Billing, Subscriptions, Seat Management, Prepaid Credits. Silent Eight covers Alert adjudication, Narrative generation, Name screening automation, Quality assurance.

Answered from the vendors’ own pages

Polar: Do you handle international payments and taxes?

Yes, Polar acts as merchant of record in 100+ markets, handling payment processing, tax collection, and compliance automatically.

Source
Silent Eight: Does Silent Eight replace our screening system?

No. It consumes alerts from your existing screening and monitoring systems and decides them. The detection layer stays where it is.

Polar: Is there a free tier?

Yes, the Starter plan is free and charges 5% + $0.50 per transaction, ideal for testing and early-stage development.

Source
Silent Eight: Will a regulator accept AI closing alerts?

It depends on your jurisdiction and your model governance evidence. Banks typically run extended shadow mode first and phase auto-closure by alert type.

Polar: Do you offer discounts for startups?

Yes, the Startup Program provides the Scale plan free for 12 months for early-stage AI companies.

Source
Silent Eight: Where is the company based?

Singapore, with offices in New York, London and Warsaw.

Share

Related pages

More on Polar

More on Silent Eight

Keep looking

Other head to heads