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Flexprice

Usage-based and credit-based billing infrastructure for AI products, with real-time metering and an open-source core

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freemiumBasic is free with 100,000 events per month, valid up to $100K in cumulative billing revenue: any pricing model (subscription, usage-based or hybrid), add-ons, percentage or fixed coupons, tax management, billing webhooks, PDF invoices, HTTP usage ingestion and community Slack support. Build is $500/month with 1 million events per month, a 99.9% SLA and 99.99% HA options, valid up to $250K cumulative or $20K monthly billing revenue, adding real-time metering and reporting, customer usage views, Stripe payments integration, API key management, prepaid usage with credits and a 1-business-day P0 response. Scale is $1,000/month with 5 million events per month, valid up to $1.2M cumulative or $100K monthly, adding prepaid credits and wallets, a customer portal, pricing experiments, plan overrides for enterprise contracts, custom SQL metrics, multi-currency and multi-timezone billing, HubSpot and Stripe Tax plus 50+ integrations, Google SSO, audit logs, a 2-business-hour P0 response and a private Slack channel. Mission Critical is custom-priced with a forward-deployed engineer. Annual billing saves 20%. An open-source distribution is available.View full pricing →

Visit Flexprice

https://flexprice.io/

About Flexprice

Flexprice is usage-based billing infrastructure built for the pricing models AI products actually need: per-token and per-request metering, prepaid credit wallets, subscriptions, and hybrids of all three. Anyone who has tried to express 'a $20 plan that includes 500 credits, tops up at $0.02 each, and rolls over unused balance' inside a subscription billing tool understands why this category exists — credit systems are where generic billing platforms stop being sufficient. The platform handles real-time metering and reporting, plan and add-on configuration, coupons in percentage or fixed form, tax management, billing webhooks, PDF invoices and HTTP usage ingestion from the free tier upward. Paid tiers layer on prepaid credits and wallets, a customer portal, pricing experiments, plan overrides for enterprise contracts, custom SQL metrics, multi-currency and multi-timezone billing, and integrations with Stripe Payments, Stripe Tax, HubSpot and 50-plus others. There is an open-source distribution alongside the cloud platform, so self-hosting is available for teams unwilling to route revenue data through a vendor. Pricing gates on both monthly event volume and cumulative billing revenue, which means the free tier remains genuinely free for a pre-revenue product and only starts costing once you are billing meaningfully — a shape that suits early AI products far better than a percentage of revenue would. The company has raised a $1.5M seed round.

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Key Features

Subscription, usage-based and hybrid pricing models in one system
Real-time metering and reporting
Prepaid credits and customer wallets
PDF invoices, coupons, tax management and billing webhooks
Custom SQL metrics and pricing experiments on higher tiers
Stripe Payments, Stripe Tax, HubSpot and 50+ integrations
Open-source distribution alongside the hosted cloud platform

Flexprice Pros & Cons

Pros

  • +Credit wallets and prepaid balances are first-class, not bolted onto subscriptions
  • +Free tier is gated on revenue, so pre-revenue products pay nothing
  • +Open source means revenue data need not leave your infrastructure

⚠️ Cons

  • The step from free to $500/month Build is a cliff for a product just starting to earn
  • Prepaid credits and wallets — a headline feature — require the $1,000/month Scale tier
  • Revenue-based tier gating means growth forces an upgrade regardless of event volume

Tags

billingusage-based-pricingmeteringstripeopen-sourcecredits
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