Polar vs Stripe for Solo Developers

Comparing Polar and Stripe for solo developers. Merchant-of-record billing for digital products versus the payments default. Fees, taxes, and which to pick.

Quick Comparison

Feature	Polar	Stripe
Type	Merchant of record for digital products and subscriptions	Direct payment processor and billing platform
Base Pricing	Free Starter plan at 5% + 50 cents per transaction, handles VAT and sales tax (paid plans drop the rate)	2.9% + 30 cents for domestic cards, plus Stripe Tax at 50 cents per taxed transaction
International Cards	+1.5% on non-US cards, every plan	+1.5% on international cards, plus 1% if currency conversion is required
Disputes	$15 per dispute regardless of outcome	$15 per dispute received
TypeScript SDK	@polar-sh/sdk v0.47.1, about 190K weekly npm downloads	stripe v22.2.0, about 11.8M weekly npm downloads
GitHub	polarsource/polar, 9.9K stars, Apache-2.0, source available	stripe/stripe-node, 4.4K stars, MIT
Learning Curve	Easy	Moderate
Best For	Solo developers selling globally without becoming a tax expert	Anyone needing full control over payments and complex billing
Solo Dev Rating	9/10	9/10

Polar Overview

Polar is the merchant-of-record platform built for developers selling digital products and subscriptions. The pitch is simple. Polar becomes the legal seller of record, which means they handle VAT in the EU, GST in Australia, sales tax in the US, and the long tail of compliance you would otherwise be responsible for. You collect the revenue, they handle the tax.

The platform was originally aimed at open source funding but has grown into a full Stripe-style billing layer for indie SaaS, digital downloads, and license keys. Checkout pages are clean, the API is well documented, and the SDKs for Next.js, TanStack Start, Hono, and other TypeScript runtimes are pleasant to use. Webhooks cover everything you need to keep your database in sync.

The cost is a higher transaction fee than Stripe, but for most solo developers selling internationally, the math works out in Polar's favor once you factor in the value of not registering for VAT in dozens of countries. It is a real tradeoff worth doing the math on for your specific case.

One thing to watch in 2026. Polar moved off its old flat 4% plus 40 cents rate and onto tiered plans on May 27, 2026. The free Starter plan now charges 5% plus 50 cents per transaction, and you buy a lower rate by subscribing to a paid plan (Pro at $20 a month for 3.8% plus 40 cents, Growth at $100 a month for 3.6% plus 35 cents, Scale at $400 a month for 3.4% plus 30 cents). Organizations created before the cutoff keep a grandfathered Early Member rate of 4% plus 40 cents (plus 0.5% on subscriptions) indefinitely, but they lose it permanently the moment they upgrade to a paid plan. Either way there is a flat +1.5% surcharge on non-US cards. Run your own numbers against the current plan you would actually land on.

Stripe Overview

Stripe is the payment processor that has defined the developer payments experience for over a decade. The API is excellent, the documentation is famously good, and the platform supports almost any payment method you can think of. Subscriptions, invoices, usage-based billing, marketplaces with Stripe Connect, and embedded checkout all work and scale to companies of any size.

The catch for international sellers is that Stripe is a payment processor, not a merchant of record. Tax compliance is your problem. Stripe Tax helps by calculating and collecting the right amounts, but you still need to register, file, and remit taxes in every jurisdiction where you have nexus. For a solo developer selling globally, this can become a part-time job.

The transaction fees are lower than Polar's headline rate, but the total cost depends on whether you use Stripe Tax (an additional fee), how many disputes you receive, and how many currencies you accept. For domestic-only businesses, Stripe is almost always cheaper. For global sellers, the answer is less obvious.

Key Differences

The legal model is the fundamental difference. Polar is the merchant of record, meaning they sell to your customers and pay you. Stripe processes payments on your behalf, meaning you sell to the customer directly. That single distinction cascades into who handles tax, who handles refunds, who handles chargebacks, and who appears on the customer's credit card statement.

Tax compliance is a different animal. With Polar, you do not register for VAT, GST, or sales tax anywhere. They handle it. With Stripe, you can use Stripe Tax to calculate amounts, but you are still legally responsible for registering, filing, and remitting in every jurisdiction. For solo developers, this is the single biggest reason to consider Polar.

Fees structure looks similar but behaves differently. Stripe's 2.9 percent plus 30 cents is lower than Polar's headline rate on the surface, whether you compare it to Polar's free Starter plan at 5 percent plus 50 cents or the grandfathered Early Member rate at 4 percent plus 40 cents. Add the 50 cent Stripe Tax fee per taxed transaction, the cost of an accountant for tax filings, and the time you spend on compliance, and Polar often comes out cheaper in total cost of ownership for global sellers. Domestic-only sellers usually still win with Stripe.

Product surface area is different sizes. Stripe does everything from payments to issuing physical cards to running a marketplace. Polar is focused on selling digital products and subscriptions to end customers. If you need split payments, payouts to other accounts, or complex multi-party flows, Stripe is the only realistic choice. If you just need to sell your SaaS to customers, Polar covers it.

The integration paths differ. Stripe has more SDKs, more languages, more frameworks, and more third-party tutorials than any payment platform. Polar's TypeScript SDKs are excellent, the framework integrations for the popular TS metaframeworks are first-class, and the API is small enough to wrap yourself in any language. For non-TypeScript stacks, Stripe still wins on documentation breadth.

By the Numbers (2026)

Here is the verified state of both platforms as of late May 2026.

Polar

Pricing tiers (live since May 27, 2026): Starter free at 5% + 50 cents, Pro at $20 a month for 3.8% + 40 cents, Growth at $100 a month for 3.6% + 35 cents, Scale at $400 a month for 3.4% + 30 cents.
Grandfathered Early Member rate: 4% + 40 cents plus 0.5% on subscriptions, kept indefinitely by organizations created before the cutoff, forfeited permanently on any paid upgrade.
International surcharge: +1.5% on non-US cards on every plan.
Disputes: $15 per dispute regardless of outcome.
Payouts via Stripe: $2 per month with active payouts, plus 0.25% + $0.25 per payout.
Source available: the platform is open source under Apache-2.0 at polarsource/polar with about 9.9K GitHub stars.
TypeScript SDK: @polar-sh/sdk v0.47.1 (published April 28, 2026), roughly 190K weekly npm downloads.

Stripe

Standard pricing: 2.9% + 30 cents per successful domestic card charge.
International surcharge: +1.5% on international cards, plus 1% when a currency conversion is required.
Stripe Tax: 50 cents per transaction in jurisdictions where you are registered to collect tax.
Disputes: $15 per dispute received.
Latest API version: 2026-05-27.dahlia.
Node SDK: stripe v22.2.0 (published May 27, 2026), roughly 11.8M weekly npm downloads, MIT licensed at stripe/stripe-node with about 4.4K GitHub stars.

The download gap tells the real story about ecosystem maturity. Stripe's Node SDK pulls roughly sixty times the weekly installs of Polar's TypeScript SDK. That is not a knock on Polar, it is a decade head start. It means more Stack Overflow answers, more tutorials, and more battle-tested edge cases for Stripe, while Polar gives you a smaller and more focused surface that one person can hold in their head.

Real Cost at Solo-Dev Scale

Let me run actual numbers instead of waving at "the math works out." Take a realistic small SaaS, a solo developer doing $5,000 a month in revenue across 100 sales at $50 each. Assume 70 percent of those buyers pay with international (non-US) cards, which is normal for a globally sold indie product, and that all of it is taxable somewhere.

Polar, free Starter plan (5% + 50 cents, +1.5% on non-US cards)

Base fee: 5% of $5,000 = $250, plus 100 transactions at 50 cents = $50. Subtotal $300.
International surcharge: 1.5% on the 70 percent international share ($3,500) = $52.50.
Tax handling: included, because Polar is the merchant of record and remits on your behalf.
Total to Polar: about $352.50 a month, and zero hours on tax registration or filing.

Polar, grandfathered Early Member rate (4% + 40 cents, +1.5% on non-US cards)

Base fee: 4% of $5,000 = $200, plus 100 at 40 cents = $40. Subtotal $240.
International surcharge: 1.5% on $3,500 = $52.50.
Total to Polar: about $292.50 a month, tax included.

Stripe (2.9% + 30 cents, +1.5% international, +1% conversion, plus Stripe Tax at 50 cents)

Base fee: 2.9% of $5,000 = $145, plus 100 at 30 cents = $30. Subtotal $175.
International surcharge: 1.5% on $3,500 = $52.50.
Currency conversion: assume the 1% applies to that same $3,500 of non-US volume = $35. (Skip this if you settle in the buyer's currency or only charge USD.)
Stripe Tax: 100 taxable transactions at 50 cents = $50.
Total to Stripe: about $312.50 a month in fees.

So at this workload Stripe's raw processing cost ($312.50) lands between Polar's two plans, cheaper than free Starter ($352.50) and pricier than grandfathered Early Member ($292.50). But the Stripe number is incomplete on purpose. It does not include the part of the job that has no line item, which is you registering for VAT or sales tax in every jurisdiction where you cross a threshold, filing returns, and remitting. Hand that to an accountant and a few hundred dollars a month evaporates fast. Do it yourself and it eats evenings. Polar's higher sticker price is buying that work back. Change the assumptions (more domestic sales, fewer jurisdictions, you already have an accountant on retainer) and the comparison flips. That is exactly why you should plug your own split into these same formulas.

When to Choose Polar

You sell digital products or SaaS subscriptions to a global audience
You do not want to register for VAT, GST, or sales tax in any country
You want one fee that covers payments plus tax compliance
Your stack is TypeScript or has good HTTP client tooling
You prefer simple flat-fee pricing without add-on charges

When to Choose Stripe

You sell mostly to customers in your home country
You need advanced billing features like usage-based metering or invoicing
You are building a marketplace or platform with split payments
You want the largest ecosystem of integrations and tutorials
You are fine handling tax compliance yourself or with an accountant

The Verdict

For a solo developer selling a global SaaS or digital product in 2026, Polar is the easiest path to a real business. The merchant-of-record model removes the single biggest hidden cost of independent software sales, which is global tax compliance. The higher fee is the price you pay to not become a part-time tax accountant, and for most indie sellers that trade is overwhelmingly worth it.

Stripe is still the right choice when you sell mostly to one country, when you need advanced billing features that Polar does not yet offer, or when you are building a platform with split payments. Its product surface is enormous, the documentation is exceptional, and once you are scaled enough to have a finance team, the per-transaction savings are real.

Most solo developers should pick Polar and stop thinking about it. Ship the product, accept money worldwide, let Polar handle the legal mess. If your business grows to the point where the fee difference outweighs the compliance burden, you can migrate to Stripe with whatever team you have hired by then. Until that day, optimize for shipping, not for shaving 1 percent off your transaction fee.