Polar, the payments infrastructure company for AI-native SaaS companies, has raised a $10M seed round led by Accel to transform payments for the next generation of developers. Developers end up spending too much time integrating and maintaining billing instead of shipping impactful features for their customers. Polar changes this with a Merchant of Record (MoR) billing engine designed for AI-native SaaS and the next generation of developers. Polar integrates with just six lines of code and obsesses over developer ergonomics for modern programming languages and frameworks, meaning the developers behind this new wave of AI-native businesses can onboard and start accepting payments globally in minutes – faster than any other solution on the market. Developers can also focus on scaling their software internationally while Polar handles global sales taxes for them. To help developers monetize their products effectively, Polar comes with usage-based billing infrastructure that can automatically ingest customer events and token consumption from OpenAI or Anthropic to S3 consumption, data streams and more. Developers can also use Polar to automate common SaaS entitlements and digital products in minutes – from license keys, file downloads, GitHub and Discord access to custom entitlements – and distribute them directly to customers, offering a simple pathway to upselling without the need to deal with sales tax or build these features yourself. Built by and for the open source community, Polar also comes with seamless connections to Framer, Raycast, and Zapier. Average online sales have grown more than 120% month-on-month for the past six months.