Polar vs Stripe for SaaS: why Varel picked Polar

Varel had a practical billing decision to make: use Stripe directly, or build on Polar and accept a more opinionated merchant-of-record flow.

I checked the current public pages on June 18, 2026. Stripe lists 2.9% + 30¢ for domestic card transactions in the US, plus common additions for international cards and currency conversion. Polar lists Starter at 5% + 50¢, with paid plans that reduce the variable rate.

Where Stripe wins

Stripe wins on ubiquity. More developers know it. More examples exist. More edge cases have public answers. If you need payment method depth, complex marketplace flows, a custom billing system, or an existing finance team that already lives in Stripe, it is hard to argue against starting there.

Stripe is also more flexible. You can model almost anything if you are willing to own the billing architecture, tax posture, reporting, disputes, and customer support details around it.

Where Polar wins for indie SaaS

Polar is attractive because it is not just payment processing. It is the merchant of record. Polar's supported-countries docs say it supports payments globally except sanctioned countries, and its payout page currently lists 119 payout countries through Stripe Connect Express. Its merchant-of-record docs explain that Polar takes on international sales-tax liability for the transaction.

The product fit also matters. Polar is built around software billing: subscriptions, usage, seats, credits, trials, discounts, checkout, customer state, webhooks, benefits, and payouts. That maps well to a starter kit selling a one-time core license, optional setup help, and repo-access benefits.

Merchant of record in plain English

A merchant of record is the legal seller responsible for payment obligations like tax calculation, collection, and remittance. Stripe's own explainer describes that responsibility. Stripe Tax can help calculate and collect taxes, and its pricing page lists 0.5% where you are registered to collect taxes, but using Stripe directly still leaves you responsible for the tax posture unless you use a merchant-of-record product.

For a solo founder, that distinction is not academic. It changes the launch checklist. With direct Stripe, you are deciding where you sell, where you have nexus, where you register, how you file, and how you reconcile the tax reports. With Polar, the trade is higher platform fees for a much smaller compliance surface.

Why Varel picked Polar

• Varel wants the default billing path to be understandable for solo builders.
• The one-time Core license and higher-touch setup offer fit Polar's product and benefit model.
• Polar's GitHub access benefit maps cleanly to private repository access after purchase.
• The agent setup path is easier when billing, benefits, customer state, and MoR handling live behind one provider boundary.

The honest verdict

Pick Stripe if you need maximum flexibility, broad ecosystem support, custom payment flows, or already have the finance/compliance muscle to run direct merchant operations.

Pick Polar if you are selling software, want merchant-of-record handling, and would rather pay more per transaction than carry the tax and benefits glue yourself. That is why Varel starts there.