
Polar
Merchant of RecordPolar (polar.sh) is an open-source merchant of record and billing platform for developers selling software, SaaS subscriptions and digital products. It is run by Polar Software, Inc., a Delaware corporation whose team is based in Stockholm, and was founded in 2022 by Birk Jernström, who co-founded the e-commerce platform Tictail, sold it to Shopify in 2018 and then led product for Shopify's Shop app. Polar launched version 1.0 of its billing platform in September 2024 and raised a $10 million seed round led by Accel in June 2025, with angels from Shopify, Vercel, Supabase, Raycast, Resend and Framer. As merchant of record it is the legal seller of everything sold through it — it collects and remits US sales tax, EU VAT, Canadian GST and other taxes, carries chargeback liability and issues the invoices — and it charges a single platform fee on top of that. That fee changed on 27 May 2026. Organisations created before that date keep an 'Early Member' rate of 4% + 40¢ plus 0.5% on subscriptions indefinitely; new organisations pay 5% + 50¢ on the free Starter plan or buy down the rate with Pro ($20 a month, 3.8% + 40¢), Growth ($100, 3.6% + 35¢) or Scale ($400, 3.4% + 30¢). International (non-US) cards add 1.5%, disputes cost $15 each regardless of outcome, payouts go through Stripe Connect at Stripe's pass-through fees ($2 per active payout month, 0.25% + 25¢ per payout), and organisations created on or after 12 May 2026 have a seven-day settlement delay before they can withdraw. Its code is Apache 2.0 on GitHub, its SDKs and framework adapters are widely praised, and its weak points are the ones you would expect of a seed-stage company two years into operating: thin support, fixed dunning you cannot customise, and pricing for newcomers that is now level with Paddle and Lemon Squeezy rather than below them.
Expert grade B-Read review →