Softwr

Accounting · head to head

Polar vs Sila

Polar logo

Polar

Accounting

Billing and revenue platform for AI and infrastructure companies

From
Free
Rated
-
Full reviewWebsite
Sila logo

Sila

APIs

US money movement API for ACH, RTP and FedNow with KYC and ledgering built in

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; Sila no pricing is published, so you cannot compare Sila against Moov or Dwolla without entering two sales processes, and small programmes frequently find the monthly minimum dominates their cost at low volume.
  • They diverge on capability: Polar covers Usage Billing, Sila covers ACH origination.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Polar and Sila actually diverge.

Attributes where Polar and Sila differ
AttributePolarSila
Starting priceFreeOn request
Pricing modelPercentage of transaction plus per-transaction feequote
Free tierYesNo
CategoryAccountingAPIs

Identical on both: platforms (Web, API), 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 Sila

  • ACH origination
  • Instant rails
  • KYC and KYB
  • Virtual accounts
  • Ledger
  • Wallets and holds
  • Webhooks
  • Bank-side deployment

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 Sila
  • Managing tiered pricing for infrastructure usage-based servicesnot Sila
  • Handling subscription and usage hybrid modelsnot Sila
  • Monetizing AI APIs with usage metering and creditsnot Sila

Sila

  • A small fintech that needs ACH, identity verification and a ledger from one vendor because it has no compliance team to assemble threenot Polar
  • A marketplace paying out to sellers that wants same-day ACH and instant push options without becoming a money transmitter itselfnot Polar
  • A community bank replacing batch file ACH processing with an API so it can offer real-time payments to business customersnot Polar
  • A lending platform that must verify business identity, disburse funds and collect repayments on a schedule from a single integrationnot 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

Sila

  • No pricing is published, so you cannot compare Sila against Moov or Dwolla without entering two sales processes, and small programmes frequently find the monthly minimum dominates their cost at low volume.
  • Sila is materially smaller and less well capitalised than the banking-as-a-service names it competes with, which matters because your customer funds and your payment rails depend on the vendor still trading in three years.
  • The sponsor bank behind your programme determines what you can offer and how fast you can change it, and bank partnerships in this sector have been reshuffled repeatedly since 2023, so a bank change during your contract is a realistic risk rather than a theoretical one.
  • Coverage is United States only, so any product with cross-border ambitions needs a second payments vendor and a second reconciliation process from the outset.
  • Onboarding involves compliance diligence on your own programme, and teams routinely underestimate this, with weeks lost between signing and first live transaction while policies, flow of funds diagrams and BSA arrangements are reviewed.

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

Sila

On request
  • Sila Payments Platform$undefined/month
    • ACH, RTP and FedNow
    • KYC and KYB verification
    • Virtual accounts and ledger

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 Sila if

  • You need ach origination.
  • You work on Web, API.
  • You also want instant rails.
Sila review

Questions people ask

Is Polar or Sila better?
Neither clearly leads. Polar starts at Free and Sila at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Polar or Sila?
Polar has a free tier; the other does not. Paid plans start at Free for Polar and On request for Sila.
Does Polar or Sila run on more platforms?
Both run on Web, API, so platform support will not decide this one for you.
Can I use Polar for free?
Yes. Polar has a free tier, so you can try it without paying. Sila 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 Sila is typically brought in for.
What can Polar do that Sila cannot?
Polar covers Usage Billing, Subscriptions, Seat Management, Prepaid Credits. Sila covers ACH origination, Instant rails, KYC and KYB, Virtual accounts.

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
Sila: Does Sila require a sponsor bank?

Yes. Funds sit at a partner bank, and which bank that is affects your product features and your regulatory exposure, so ask before signing.

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
Sila: Is Sila still operating?

Yes. It continues to trade and announced an API integration with GBank in 2025 covering ACH, RTP and FedNow.

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
Sila: What does it cost?

Sila does not publish rates. Expect per-transaction pricing plus a monthly minimum, quoted after a compliance conversation.

Sila: Can I use it outside the United States?

No. Sila covers US rails only.

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