Polar handles all your sales tax and VAT for you, taking that off your plate, while Airwallex focuses on making cross-border payments easy and lets you keep money in multiple currencies.
Only use Airwallex if you need to accept and spend money internationally in multiple currencies; stick with Polar if you want tax and VAT handled for you and are focused on growing a startup.
Polar stands out for startups that want the simplest way to handle payments and avoid any headaches around sales tax or VAT. It acts as your Merchant of Record, taking over all compliance so you don't have to think about it. If you're in that $1K, 400K MRR range and just want payments to work without worrying about tax rules, Polar is the clear pick.
Airwallex is built for businesses that operate internationally and need to manage money in different currencies. If you care about letting customers pay in their own currency, holding and spending those funds without forced conversions, or paying global vendors directly from those balances, Airwallex is built for you. But if your business is domestic or you don't need multi-currency support, it's more than you need.
If your top concern is sales tax and VAT compliance with minimal hassle, go with Polar. If you're running a global business and need true multi-currency payment and expense management, Airwallex is the better fit. Each one nails its target workflow, so pick based on whether your pain is compliance or cross-border payments.
