Used by Tailwind Labs and recognized as an official GitHub funding partner, Polar is the open-source billing infrastructure that lets developers ship production-ready monetization in hours instead of weeks. Meter tokens, API calls, agent runs, GPU seconds, and storage with event-level precision, then compose usage billing with subscriptions, seats, credits, trials, and discounts into whatever pricing model your product requires. As Merchant of Record, Polar handles sales tax, VAT, chargebacks, receipts, and regulatory compliance across all supported countries so you receive clean payouts without building tax infrastructure. Integrate via the full REST API with official SDKs for JavaScript, Python, PHP, and Go, plus framework adapters for Next.js, Astro, Remix, SvelteKit, and Laravel enabling checkout integration in minutes. Automatically deliver benefits upon purchase including GitHub repository access, Discord roles, license keys, file downloads, and meter credits through configurable automation rules. The built-in customer portal provides subscription management, payment method updates, invoice history, and benefit access with full white-label branding. Monitor revenue, costs, and margins through real-time analytics dashboards showing the unit economics every AI startup needs to scale. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. Apache License 2.0 licensed.

Sell from your own server with a store that arrives as a single file: myCart pairs a public storefront and an admin panel with checkout, and there is no plugin ecosystem to assemble first. You manage products with variants that track their own inventory, pricing, and SKUs, and you can sell physical goods, downloadable files, and license keys from the same catalog. Checkout accepts Stripe and PayPal for cards and wallets, SpectroCoin and Coinbase Commerce for cryptocurrency, and a built-in dummy provider that processes free products with no payment setup at all. Buyers can check out as guests or register for a customer cabinet that keeps their orders, re-downloadable files, and issued license keys in one place. The storefront ships in eight languages, English, Chinese, Korean, French, Spanish, German, Italian, and Belarusian, with the language switcher available in both the shop and the admin panel. You upload your own logo, favicon, and tagline from the admin panel and the storefront adopts them immediately with no rebuild. The whole shop runs on an embedded SQLite database with nothing else to operate, or on PostgreSQL when you need concurrent writers and managed backups. Built-in HTTPS support and hardened, separately keyed sessions protect the panel and the customer cabinet. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. MIT licensed.