Stripe
stripe.com
Payments infrastructure for the internet
Subscription billing and revenue operations
Complex recurring billing — trials, proration, dunning, revenue recognition and entitlements — sitting on top of a payment gateway.
Free plan, no card required
Ongoing free tier published by the vendor. Limits vary by plan.
Other tools in accounting & finance that cover similar ground. Full comparison.
stripe.com
Payments infrastructure for the internet
quickbooks.intuit.com
Small business accounting standard
xero.com
Cloud accounting with a huge app ecosystem
Entry prices across Accounting & Finance, cheapest first.
6 of these 7 prices were read from the vendor's own pricing page; the rest are marked * and are indicative. The median is taken across the 6 verified prices in Accounting & Finance. 3 more tools in this category do not publish an entry price and are not plotted.