Stripe Billing vs. Metronome vs. Lago for early-stage SaaS

For most early-stage SaaS, core Stripe Billing is enough. Metronome and Lago earn their keep only once your metering volume or pricing complexity outgrows what you want to run on Stripe Billing directly. Adding a dedicated billing platform too early buys you a heavier billing surface and a recurring bill you don't yet need.

Here's how I think about the three.

The short version

• You already use Stripe and your pricing fits its primitives: stay on Stripe Billing.
• You have very high event volume or complex, custom rating logic: evaluate Metronome, now part of Stripe.
• You want an open-source billing engine you self-host and control: look at Lago.

Stripe Billing

Stripe Billing handles subscriptions, Billing Meters, metered prices, tiered and graduated pricing, invoicing, tax, proration, dunning, and a customer portal — all on the account you already run for payments. For the vast majority of SaaS companies, that's the entire billing system. Its limits show up at extreme metering volumes and when you need rating logic that doesn't map cleanly onto Stripe Prices.

The big advantage is that there's no extra vendor: one system of record, one bill, one integration to maintain.

Metronome

Metronome is Stripe's usage-metering, contracting, and rating product for high-volume, usage-heavy businesses — think infrastructure and AI companies with billions of events and bespoke pricing. It can sit in front of Stripe as the rating layer and create Stripe invoices for collection. The trade-off is implementation weight: contracts, meters, rating, invoice handoff, and customer-facing usage visibility become their own workflow instead of a simple Stripe Billing setup.

Lago

Lago is an open-source billing platform you can self-host. It's attractive if you want full control over your billing data and rating engine, or you have requirements that rule out a fully managed service. The trade-off is operational: you're now running and maintaining billing infrastructure, which is its own ongoing engineering cost.

How to choose

Ask one question first: does your pricing fit core Stripe Billing's primitives? If yes, the simplest correct system is Stripe Billing implemented well — no heavier platform, no migration to do later if you outgrow it (because you haven't added one yet). If your metering volume or rating complexity genuinely exceeds what Stripe Billing should carry, then a dedicated platform is worth its weight.

I implement billing directly on Stripe precisely because most teams are in the first bucket and don't need a second system. If you're unsure which bucket you're in, that's exactly the call I'll make with you in a Billing Teardown — including telling you when a dedicated platform is the right answer.