Compare AI billing platforms

Fair, honest comparisons of usage-based billing infrastructure for AI products. Updated May 2026.

Why this site exists

AI billing breaks the assumptions traditional SaaS billing was built on. Every API call carries direct infrastructure cost. Concurrent requests create races against the customer's balance. Margins shift every time you change models. Cycle-end invoicing was designed for predictable per-seat costs, not per-inference workloads.

Invoice-based billing predates AI products. It came from enterprise SaaS and was adapted to fit AI workloads. The genuine architectural response to AI's real-time cost structure was something different: pre-funded customer balances, authorization before the inference runs, and immediate debit when it completes. Both approaches work for AI products today and each makes different trade-offs. This site compares them across the same rubric.

Read more about why AI billing is different →

Head-to-head comparisons

FlexpricevsCredyt

Open-source wallet billing vs real-time pre-authorization infrastructure

FlexpricevsLago

Wallet-native open-source billing vs open-source billing with mature ecosystem and enterprise support

Open-source wallet-native billing vs enterprise hosted usage-based billing

FlexpricevsStigg

Open-source usage metering and wallets vs SaaS entitlement orchestration

FlexpricevsStripe Billing

Open-source wallet-native billing vs payments-integrated invoice billing

Open-source invoice billing vs real-time wallet pre-authorization

LagovsMetronome

Open-source self-hostable billing vs enterprise metering with Stripe acquisition

Open-source self-hostable billing vs enterprise hosted revenue platform

LagovsStripe Billing

Open-source self-hostable billing vs payments-integrated invoice billing

MetronomevsCredyt

Enterprise invoice metering vs real-time pre-authorization and wallets

MetronomevsStripe Billing

Acquired metering platform vs integrated billing and payments stack

SQL-defined invoice metering vs real-time wallet pre-authorization

Enterprise usage-based billing with pricing simulation vs enterprise billing inside the Stripe ecosystem

OrbvsStripe Billing

Enterprise usage-based billing vs payments-integrated invoice billing

Entitlement orchestration vs real-time wallet billing

StiggvsStripe Billing

Entitlement orchestration layer vs full-stack billing and payments

Stripe BillingvsCredyt

Invoice-based subscription billing vs real-time pre-authorization and wallets

All providers

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Credyt

Real-time billing infrastructure for AI: pre-usage authorization, multi-asset wallets, and event-level profitability.

Real-timeWalletsEntitlements

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Flexprice

Open-source usage metering and wallet-credit billing with a no-code pricing dashboard for SaaS and AI teams.

Invoice-basedOpen SourcePricing Simulation

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Lago

Open-source billing platform for usage-based pricing, self-hostable under AGPLv3 with managed cloud tiers.

Invoice-basedOpen SourceWallets

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Metronome

Usage-based billing and enterprise contract management for high-volume AI and software companies; now part of Stripe.

Invoice-basedEnterpriseBilling Portal

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Orb

Enterprise usage-based billing with SQL-defined metrics, pricing simulation, and deep finance integrations.

Invoice-basedPricing SimulationMulti-PSP

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Stigg

Pricing orchestration layer for entitlements and credit management, layered above existing billing infrastructure.

Real-timeEntitlementsPricing Simulation

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Stripe Billing

Subscription and usage-based billing tightly integrated with Stripe payments, tax, and revenue recognition.

Invoice-basedBilling Portal

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Guides

5 Best Stripe Alternatives for Usage-Based Billing (2026)

The best Stripe alternatives for usage-based billing in 2026 split between real-time and invoice-based architectures. Compare solutions for AI products.

10 min read·Updated April 2026

PSP Integration Patterns for AI Billing Systems

Five PSP integration patterns shape how AI billing platforms fit with existing payment setups. Compare trade-offs and pick the pattern that fits your stack.

10 min read·Updated April 2026

What Is Usage-Based Billing?

Usage-based billing charges customers by actual consumption, not flat fees. See how it works, compare five pricing models, and why AI products need a fundamentally different approach.

8 min read·Updated April 2026

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