Polar vs Lemon Squeezy vs Paddle: Merchant of Record for Next.js (2026)

We keep the ShipGarden gallery honest about the boring parts of shipping, and nothing is more quietly load-bearing than who actually sells your software. A merchant of record (MoR) becomes the legal seller of your product. It collects the money, files the sales tax and VAT, and absorbs the chargeback risk, so a two-person Next.js team does not have to register in dozens of tax jurisdictions. In 2026 the three names a solo founder or small studio actually shortlists are Polar, Lemon Squeezy, and Paddle. On a pricing page they look interchangeable. They are not, and the thing that separates them is not the headline rate.

Quick answer (2026)

For a Next.js SaaS in 2026, pick Polar if you want the only open-source merchant of record (Apache-2.0, self-inspectable) with a real Next.js adapter and a per-transaction fee that can drop below the pack on paid tiers. Pick Lemon Squeezy if you want the most mature all-in-one checkout, with subscriptions, license keys, and a hosted store, and you are comfortable that it is now part of Stripe. Pick Paddle if you are a slightly larger B2B SaaS that wants a proven MoR with 24/7 support and does not mind an approval step. All three charge a headline 5% + 50¢ at the entry tier; the differences that decide it are ownership, developer experience, and where the fee goes as you grow.

What a merchant of record actually does

A payment processor (raw Stripe, for example) moves money and leaves the tax paperwork to you. A merchant of record goes further: it is legally the seller, so it calculates, collects, and remits sales tax and VAT worldwide, and it owns the relationship with the card networks. For an indie team selling globally, that is the difference between shipping and spending a quarter reading tax law. Stripe on its own is a processor, not an MoR, which is why it is not in this three-way; we broke down Lemon Squeezy against raw Stripe separately. The trade you accept with any MoR is a higher blended rate in exchange for never touching a VAT return. The live question founders keep asking on threads like this r/SaaS payments comparison is not "which is cheapest" but "which one do I want to be married to."

The three at a glance (2026)

All three are a merchant of record that handles global sales tax and VAT (each vendor's 2026 pricing page, linked below).

Polar: the open-source one

Polar is the only merchant of record here you can read the source of. The polarsource/polar repository is Apache-2.0 with about 10.1k GitHub stars, a Python and TypeScript codebase, and daily commits (the SDK hit 1.0.0-alpha.15 on July 22, 2026). It describes itself as "a billing platform for the intelligence era," and it is the pick that fits a boilerplate gallery: you can inspect exactly how your checkout works instead of trusting a black box.

Per Polar's own fee docs (2026), the pay-as-you-go Starter tier is 5% + 50¢ per transaction, identical to the others. Where it diverges is the paid ladder: Pro is 3.8% + 40¢, Growth is 3.6% + 35¢, and Scale is 3.4% + 30¢. There is a genuine gotcha here that no comparison prints: organizations that joined before May 27, 2026 keep a grandfathered 4% + 40¢ rate on the free tier, but upgrading to any paid plan forfeits it permanently. International cards add 1.5%, and disputes cost $15 each. For a Next.js team, Polar ships a first-party adapter and a Better Auth plugin plus a sandbox, so wiring checkout into an app-router project is genuinely quick.

Lemon Squeezy: the mature all-in-one, now inside Stripe

Lemon Squeezy is the most feature-complete of the three. One account gives you subscriptions, license-key issuance for desktop apps, a no-code hosted store, coupons, upsells, and up to 21 payment methods including PayPal. Per its pricing page (2026), ecommerce is 5% + 50¢ per transaction with no monthly fee, and it is your merchant of record for tax. The context that changes the decision: Lemon Squeezy is now part of Stripe, and its own site brands the product "Lemon Squeezy + Stripe Managed Payments" in 2026. That buys Stripe-grade reliability, but it also means the roadmap now answers to a much larger owner, and the pricing page notes that "some payments may be subject to additional fees." If you want the richest out-of-the-box toolkit and Stripe's backing does not worry you, this is the safe default.

Paddle: the enterprise-leaning MoR

Paddle is the oldest and most enterprise-shaped of the three. Per Paddle's pricing (2026), the standard pay-as-you-go plan is 5% + 50¢ per checkout transaction, with no monthly, migration, or hidden fees, cross-border tax compliance, fraud and chargeback protection, and 24/7 support for you and your customers. The catches are onboarding and scope: Paddle reviews new accounts before approval, and products under $10 (or invoicing needs) require a conversation with sales rather than a self-serve signup. For a funded B2B SaaS that wants a heavyweight partner, that friction is a fair trade; for someone selling a $7 template tonight, it is a wall.

The fee math nobody prints

Headline rates hide the truth, so here is the arithmetic on three real cohorts, using each vendor's sourced 2026 entry rate (5% + 50¢) and Polar's Scale rate for contrast. This is transparent math, not a benchmark.

Two things fall out. First, at the entry tier the three are effectively identical, so a founder choosing on price alone at low volume is splitting hairs. Second, that fixed 50¢ dominates small sales: a $10 product loses 10% to fees, which is why sub-$10 pricing is brutal on any MoR (and why Paddle simply asks you to talk to sales below $10). Polar's lower tiers only pull ahead once you are on a paid plan and doing real volume. If you want to model your own numbers past these three cohorts, the line-by-line pricing teardowns BudgetForge publishes are a good companion.

Where each one loses

• Polar is the youngest, with the shortest payout track record, and its payouts run through Stripe, so you inherit Stripe payout mechanics and country availability. The grandfathered-rate trap can also bite you exactly when you scale.
• Lemon Squeezy trades independence for Stripe's backing. If a Stripe-owned roadmap concerns you, or you want a vendor whose only job is being an MoR, that is a real downside, not a footnote.
• Paddle is the least indie-friendly. The approval process, the enterprise framing, and the sub-$10 wall make it a poor fit for a first, tiny, self-serve launch.

How to pick in 2026

Choose Polar if you value open source, want a clean Next.js integration, and expect to grow into its cheaper paid tiers. Choose Lemon Squeezy if you want the most complete checkout and store today and are fine being inside Stripe. Choose Paddle if you are a larger B2B SaaS that wants a proven, high-touch MoR and can clear its onboarding. For most solo founders shipping a Next.js product this year, the honest shortlist narrows to Polar for ownership or Lemon Squeezy for breadth. The rest of our open-source Next.js SaaS and AI starter scorecard is where these choices meet the code they plug into.

Your move: price your real average sale against that 50¢ floor before you fall for a headline percentage.