9 guides
Tutorials
Integrate Square payments in Node.js: Web Payments SDK, server-side charges, customer management, invoices, and subscriptions. With Square vs Stripe comparison.
Payments & billing · · 10 min read
Comparisons
Polar is the best Merchant of Record for developer tools at 4%+40¢. Stripe Connect powers custom marketplaces. Lemon Squeezy is simplest for solo creators.
Payments & billing · · 9 min read
Tutorials
Stripe and Plaid payment system guide for 2026 — recurring billing, bank connections, invoicing, and the full production payment stack in one guide Updated.
Payments & billing · Financial data & operations · · 12 min read
Tutorials
End-to-end Stripe subscription implementation: products + prices, checkout session, customer portal, webhooks, trial periods, proration, and dunning in 2026.
Payments & billing · · 15 min read
Tutorials
Add Stripe payments to a Next.js App Router app with Checkout Sessions, subscriptions, signed webhooks, Billing Portal, env vars, and a production checklist.
Payments & billing · · 17 min read
Comparisons
Polar charges 4% + 40¢ as a Merchant of Record — the lowest MoR fee in the market. Stripe charges 2.9% + 30¢ but you handle taxes yourself. Lemon Squeezy.
Payments & billing · · 9 min read
Tutorials
Stripe webhooks in production: signature verification, idempotency, retry handling, Stripe CLI testing, and the production gotchas that trip every team.
Payments & billing · · 13 min read
Explainers
Add subscriptions with Lemon Squeezy: checkout, webhooks, customer portal, license keys, and usage-based billing. Full integration guide for SaaS in 2026.
Payments & billing · · 12 min read
Checklists
Choose a payment API in 2026: compare Stripe, Adyen, Square, PayPal/Braintree, pricing traps, webhooks, PCI scope, and global methods.
Payments & billing · · 10 min read
