#subscriptions

Folloverse

Creator monetization platform combining memberships, per-post payments, and digital product sales, positioned as a lower-cost alternative to Patreon.

RetainFast

RetainFast is a Stripe-native cancellation flow widget that intercepts churn attempts with customized offers and provides analytics on cancellation reasons. Designed for SaaS platforms to reduce involuntary churn through targeted retention flows.

PaymentKit

Billing platform that routes payments across multiple processors so a business doesn't lose revenue if one payment processor shuts down its account.

Maxio

An all-in-one billing and financial-reporting platform for B2B SaaS companies, handling subscriptions, usage-based charges, revenue recognition and payment collection in one place.

Swan

A way to give your software product a real European bank account and payment cards built in, without becoming a bank yourself — popular with accounting, HR, and property-management SaaS tools.

m3ter

A billing engine, now owned by Salesforce, that turns raw product-usage data into accurate invoices for companies that charge by consumption instead of flat monthly fees.

ChurnShield

Automatically recovers failed Stripe subscription payments through smart retries and dunning emails, so subscription businesses stop losing revenue to expired cards and declined charges.

Creem

A Merchant-of-Record payments platform that handles global tax compliance, checkout, subscriptions and revenue splits for software companies, for a flat 3.9% + $0.40 per transaction.

AFFY

Runs a SaaS company's affiliate program on autopilot — it plugs into Stripe or Paddle, automatically figures out who referred each paying customer, calculates their cut, and pays them, so nobody has to track it in a spreadsheet.

UniBee

A subscription billing system you can either run yourself for free (it's open source) or pay a flat monthly fee to have hosted for you — without giving up a cut of your revenue the way some billing platforms do.

Nummuspay

A subscription billing platform that handles the recurring-payments grunt work — charging customers on time, applying the right tax, tracking who's about to churn — so a growing subscription business doesn't have to build that plumbing itself.

UnitPay

Billing infrastructure built specifically for AI companies — tracks usage like API calls or tokens, generates invoices, and shows margins in real time.

Hyperline

One platform covering the whole revenue cycle for SaaS companies — quotes, billing, and cash collection — instead of stitching together separate tools.

Serial Subscriptions

A backend service that handles the boring-but-critical parts of running a subscription business — logins, Stripe billing, usage limits, upgrades — in one integration, instead of a solo founder stitching together five different services themselves.

Vayu

An AI-powered billing and revenue platform that lets a B2B SaaS company mix subscriptions, usage-based charges, and custom contract terms in one system, then handles the accounting (ASC 606 revenue recognition) automatically instead of a finance team reco

FlyCode

A plug-in for Stripe that recovers money you're already owed — it retries failed subscription payments smarter than Stripe's default settings, and only charges you a cut of what it actually recovers.

Kelviq

A billing service that handles global sales tax, payments and usage-based pricing for SaaS and AI companies, so they don't have to build that plumbing themselves.

Meteroid

Open-source billing software that handles subscriptions, usage-based pricing and invoicing for a SaaS company, without locking you into a vendor.

Flexprice

Open-source billing engine for usage-based and AI/agent pricing, with real-time metering, credits and automatic invoicing.

Amberflo

Real-time usage metering and billing platform that tracks AI/API costs and turns them into invoices, budgets and cost controls.