AgentaOS
vs
AgentaOS vs Polar
Both are Merchants of Record for software and digital products. Polar is open-source and developer-first; AgentaOS has a lower entry rate with no monthly fee, plus hands-on onboarding and a free Revenue & Billing Audit. An objective comparison, updated August 2026.
Panche Isajeski, Founder of AgentaOS · 19+ years in payments·Pricing verified At a glance
Polar is open-source and developer-first, with volume discounts locked behind paid plans. AgentaOS is built for founders, not just developers: a flat rate on cards and subscriptions with no subscription surcharge, a free Revenue & Billing Audit, hands-on onboarding and payouts to your own bank in EUR or USD. Both handle tax and VAT.
| AgentaOS | Polar | |
|---|---|---|
| Model | Merchant of Record | Merchant of Record |
| Handles sales tax & VAT | ✓ | ✓ |
| Rate with no monthly fee | 4.5% + €0.50 | 5% + 50¢ |
| Lower rate on a paid plan | 4% + €0.40 (€49/mo) | 3.4-3.8% ($20-$400/mo) |
| Monthly platform fee | None | None |
| Open source | - | ✓ |
| Payout to your own bank (EUR / USD) | ✓ | ✓ |
| Free Revenue & Billing Audit before launch | ✓ | - |
| Onboarding & support | Hands-on | Self-serve / community |
| Track record | Launched 2026 | Since 2023, YC-backed |
| Based in | Estonia, EU | US / remote |
Rates are each platform’s publicly listed price as of August 2026. Polar’s free tier is 5% + 50¢ with no monthly fee, dropping to 3.4-3.8% on paid plans ($20-$400/mo). AgentaOS is 4.5% + €0.50 with no monthly fee, or 4% + €0.40 on the €49/mo Pro plan. Always check polar.sh and agentaos.ai for current pricing.
Where each is stronger
AgentaOS
- Hands-on onboarding, migration and human support.
- A free audit of your product, pricing and legal pages before you sell.
- Built for non-developers as well as developers.
- AI agents for pricing and churn.
- EU-based (Estonia).
Best for: founders, technical or not, who want help getting set up and growing, with a free Revenue & Billing Audit included.
Polar
- Volume discounts on paid plans, down to 3.4% + 30¢.
- Open-source and transparent.
- Developer-first API, SDK and usage-based billing.
- Modern billing primitives for engineers.
- Backed by Y Combinator.
Best for: developers who want open-source, usage-based billing, and low rates at high volume.
Common questions
Is AgentaOS cheaper than Polar?
For most founders, yes, and simpler. AgentaOS is a flat 4% + €0.40 (Pro) or 4.5% + €0.50 with no monthly fee and no subscription surcharge. Polar’s lower rates (3.4-3.8%) unlock only on paid plans from $20 to $400/mo, so you pay to save. AgentaOS gives you a flat rate from day one, plus a free Revenue & Billing Audit and hands-on onboarding.
How is AgentaOS different from Polar?
Polar is open-source and developer-first, with usage-based billing and volume discounts on paid plans. AgentaOS is built for non-developers too, with a lower entry rate, hands-on onboarding and a free Revenue & Billing Audit. Both are Merchants of Record that handle tax and VAT.
Does Polar handle tax and VAT?
Yes. Like AgentaOS, Polar is a Merchant of Record, so it calculates, collects and remits sales tax and VAT worldwide as the seller of record.
Can I move from Polar to AgentaOS?
Yes. You swap in the AgentaOS checkout and cash out to your own bank in EUR or USD. A 30-minute onboarding call covers the migration.
See if AgentaOS fits your case
If you want open-source, developer-first billing and volume discounts at scale, Polar is a strong choice. If you want a lower entry rate, hands-on onboarding and a free Revenue & Billing Audit, book a call.
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Sources, retrieved 21 August 2026: Polar fees · AgentaOS Merchant Terms. Polar may change pricing without notice; check the source before relying on these figures. A fee comparison, not financial advice.