Polar is an emerging option for OPC (especially open-source projects and Next.js developers) to sell digital products in 2026 — native React integration, open-source-friendly (built-in donation mode), zero monthly fees. More 'developer-friendly' than Lemon Squeezy, but MoR market share and maturity still need time to prove. If you use Next.js and care about a branded checkout experience, Polar is worth a try.













