Polar vs Stripe for Developers: Which Should You Use in 2026?
Use Stripe if you want the lowest fee per payment and can register, collect and file sales tax and VAT yourself. Use Polar if you want a merchant of record that handles that tax for you, at 5% + 50¢ on its free Starter plan, or look at Pocketsflow, another merchant of record, at 4.7% + $0.30 per sale as of November 2026.
Polar vs Stripe at a glance
| Question | Polar | Stripe |
|---|---|---|
| What it is | Merchant of record, built on Stripe | Payment processor |
| Card fee (US card) | 5% + 50¢ on Starter | 2.9% + 30¢ |
| Non-US cards | +1.5% | +1.5%, +1% with currency conversion |
| Sales tax and VAT | Collected, filed and paid by Polar | Your job; Stripe Tax helps for a fee |
| Subscriptions | Included | Stripe Billing, 0.7% of billing volume |
| Disputes | $15 each | $15 each |
| Open source | Yes | No |
Merchant of record vs payment processor: who handles tax
Stripe is a payment processor. Stripe moves the money, but you are the seller, so you owe the sales tax and VAT in every place where you cross a threshold. Polar is a merchant of record. Polar resells your software to the buyer, so Polar adds the right tax at checkout and the tax is Polar's to handle. Polar's own docs put it plainly: Polar is built on Stripe and takes on the liability of international sales taxes. The higher fee pays for that work. Read merchant of record explained for the full model.
Polar and Stripe fees on one payment
Stripe charges 2.9% + 30¢ per successful domestic card payment, per stripe.com/pricing. Polar's Starter plan charges 5% + 50¢ per transaction, per Polar's fees page. Both pages were read November 2, 2026. The chart shows the fee on one US card payment with no tax.
| Point | Polar Starter | Stripe card fee |
|---|---|---|
| $10 | $1 | $0.59 |
| $29 | $1.95 | $1.14 |
| $49 | $2.95 | $1.72 |
| $99 | $5.45 | $3.17 |
Source: Polar fees (polar.sh/docs/merchant-of-record/fees), Starter 5% + 50¢; Stripe pricing (stripe.com/pricing), 2.9% + 30¢ for domestic cards. Read November 2, 2026. One US card payment, no tax, no Stripe Billing or Stripe Tax.
On a $10.00 sale, Stripe takes $0.59 and Polar Starter takes $1.00. On a $99.00 sale, Stripe takes $3.17 and Polar Starter takes $5.45. Polar's paid plans narrow the gap: Pro costs $20 a month for 3.8% + 40¢, and Polar says it pays for itself above about $1,379 a month in sales. Polar works out its fee on the total with VAT included, and keeps the fee when you refund.
What Stripe costs once you add Billing and Tax
Stripe's 2.9% + 30¢ covers the card payment only. Subscriptions run on Stripe Billing, which costs 0.7% of billing volume on pay as you go. Stripe Tax Basic adds 0.5% per transaction on no-code integrations, or 50¢ per transaction through the API, and only where you are registered. Tax Basic calculates and collects tax; registrations and filings come with Tax Complete, from $90 a month on a one-year contract. A $49.00 monthly subscription on Stripe Checkout with Billing and Tax Basic costs about $2.31 in fees, against $2.95 on Polar Starter. Stripe also sells its own merchant of record, Stripe Managed Payments, at 3.5% on top of the card fee, which comes to $3.44 on the same sale. The deeper breakdown is in Stripe vs a merchant of record.
Developer experience on Polar and Stripe
Stripe gives developers low-level APIs for every payment flow: custom checkouts, Connect for marketplaces, usage-based billing, invoicing and 125+ payment methods. Stripe fits any business model, but you build more yourself. Polar sits one level higher. Polar's API and SDKs are built around products, checkouts, subscriptions and "benefits" that grant access after payment: license keys, file downloads, GitHub repository invites and Discord roles. Polar supports usage-based and seat-based pricing, has a guide for migrating from Stripe, and runs a remote MCP server with OAuth for Cursor, Claude Code, ChatGPT and Codex. Polar's code is open source on GitHub.
When Stripe is the better choice
Stripe fits teams that sell mostly in one country, or already have a tax setup, and want the lowest fee per payment. Stripe also fits marketplaces, physical goods, in-person payments and custom flows that a merchant of record does not support. At high volume, the gap between 2.9% and 5% pays for an accountant many times over.
When Polar is the better choice
Polar fits indie developers and small teams who sell software, APIs or access to a GitHub repository worldwide and do not want to register for VAT in Europe or sales tax in US states. Polar also fits teams that value an open source stack, and sellers past about $1,379 a month who can move to Polar Pro for a lower rate.
Pocketsflow: another merchant of record for developers
Pocketsflow is a merchant of record for software, SaaS, courses and digital products. Pocketsflow charges 4.7% + $0.30 per sale, with no monthly fee and no extra fee for non-US buyers, so a $49.00 sale costs $2.60. Pocketsflow includes license keys, the REST API, the pocketsflow npm SDK, 19 signed webhook events and a hosted MCP server on every plan; usage-based pricing comes with the Pro plan. Polar is still the better fit if you want open source code or GitHub and Discord access granted on payment. Compare the two in Pocketsflow vs Polar, see Pocketsflow for SaaS, or check Pocketsflow pricing.