Billing & Payments

Implement usage-based billing - define the metered unit, record events idempotently, aggregate per cycle, report to your provider, and reset - without double-counting.

A build-vs-buy guide to subscription billing software - Stripe Billing, Chargebee, Recurly, Paddle, Lemon Squeezy, and when building on Stripe is enough.

How subscription billing works - plans, customers, subscriptions, checkout, and webhooks - plus how to build it reliably with idempotent, webhook-driven access.

Stripe vs Paddle for SaaS - processor vs merchant of record, fees, tax handling, DX, and payouts - with a clear verdict on which to choose.

Stripe vs Lemon Squeezy vs Polar for SaaS billing - processor vs merchant of record, fees, and tax handling - plus how FastStaq ships Stripe and Lemon Squeezy behind one toggle.

Integrate Stripe with Next.js the safe way - create a Checkout Session, redirect, verify the webhook signature, and provision access only on the confirmed event.

Add the Stripe customer portal so users self-manage billing - enable it, create a portal session, redirect, and sync changes via webhooks - no custom billing UI required.

The 9 best Stripe alternatives for SaaS in 2026 - Paddle, Lemon Squeezy, Braintree, Adyen, and more - compared by processor vs merchant of record and best use case.

Design a SaaS pricing page that converts - three clear tiers, a recommended plan, value-based features, obvious CTAs, and a friction-killing checklist.

The main SaaS pricing models - flat-rate, tiered, per-seat, usage-based, and freemium - with examples, when to use each, and why hybrids usually win.

A complete SaaS pricing strategy - find your value metric, set clear tiers, price for expansion, and avoid the usual mistakes - with how to execute it technically.

The SaaS billing process step by step - customer, checkout, payment, verified webhook, provisioning, renewals, dunning, and cancellation - and why every step must be idempotent.