Combinator (W23)Turn Usage
Into Revenue
A billing pipeline built for AI companies. Ingest events, meter usage, apply flexible pricing, and auto-generate invoices — all without writing billing infrastructure.
Billing Pipeline
Event to revenue.
End-to-end.
Send usage events via API. We meter, price, and invoice — automatically.
Ingest
Capture API calls, token usage & custom events
Meter
Aggregate usage, enforce rate limits & quotas
Price
Apply per-unit, tiered, volume, or package pricing
Invoice
Generate itemized invoices each billing period
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- 15:19:02.651Globex Inccompletion942 tokgpt-4o-minimetered
- 15:19:02.423Acme Corpembedding2.1k toktext-embedding-3metered
- 15:19:02.198Initechcompletion3.4k tokgpt-4ometered
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- 15:19:01.812Globex Inccompletion12.1k tokgpt-4.1metered
1.2M
Events Today
847
Active Customers
$284K
Revenue (MTD)
<50ms
Avg Latency
Three steps to automated billing
From raw usage events to accurate invoices — fully automated, zero billing code
Track Usage Events
Send events via REST API, webhooks, or CSV upload. Sub-second ingestion at any scale.
Apply Pricing Models
Configure per-unit, graduated, volume, or package pricing. Mix models across product lines.
Auto-Generate Invoices
Invoices created automatically at billing cycle end with accurate line items and usage breakdown.
Flexible pricing models
Support any pricing structure — from simple per-unit to complex multi-tier. See how each model calculates in real time.
Per-Unit Pricing
Charge a fixed rate per unit consumed. Simple, predictable, and transparent.
| Item | Qty | Rate | Amount |
|---|---|---|---|
| API Calls | 50,000 | $0.002 | $100.00 |
| Storage (GB) | 250 | $0.10 | $25.00 |
| Bandwidth (GB) | 100 | $0.05 | $5.00 |
Real-Time Metering
Scales to millions
of events per minute
Ingest, process, and aggregate usage data in real time — with dashboards and threshold alerts built in.
Sub-Second Ingestion
Events processed and billable within milliseconds.
Live Dashboards
Real-time usage for your team and your customers.
Threshold Alerts
Get notified when customers approach usage limits.
Rate Limiting
Enforce quotas and overage policies automatically.
API Calls
284K
↑ +12% vs last month
Storage
2.4 TB
↑ +8% vs last month
Est. Cost
$3,215
Threshold Alert
API calls at 85% of 300K limit. Consider upgrading tier.
Customer-facing usage portal
Give your customers full visibility into their usage. Reduce support tickets and build trust with a self-serve dashboard.
Real-Time Tracking
Usage data updates live as events flow in. No delays, no batch processing.
Cost Estimates
Mid-cycle cost projections so customers are never surprised by their invoice.
Historical Trends
Month-over-month usage comparisons and growth insights.
Invoice Downloads
Itemized PDF invoices and CSV usage exports — self-serve.
Alerts & thresholds
Notify customers before they hit limits so they can upgrade or throttle on their own.
Credits & balances
Show prepaid credits, balance roll-forwards, and top-ups so finance always knows what is left to spend.
Connects to your stack
Sync invoices and payments with the tools you already use
QuickBooks
Accounting sync & revenue reporting
Xero
Two-way invoice & payment sync
Plaid
Bank connections & ACH payments
Salesforce
CRM sync & deal-to-invoice automation
HubSpot
Revenue operations & pipeline sync
Stripe
Payment processing & invoice sync
Built for usage-heavy businesses
Whether you bill per API call, per token, or per GB — we handle the complexity
AI & LLM Platforms
Bill per token, per model, per request. Multi-dimensional metering built for AI.
SaaS Platforms
Usage-based features, API calls, active users, or compute time.
API Providers
Meter every request, apply rate-based pricing, invoice developers.
Telecom & CPaaS
Per minute, per message, per session — with multi-party rating.
Data & analytics
Charge for queries, rows scanned, seats, or pipeline runs — usage that scales with customer value.
Cloud & infrastructure
Pass through or resell compute, storage, and bandwidth with clear usage lines on every invoice.
For Developers
Integrate in minutes,
not months
A simple API to track usage events. We handle metering, pricing, and invoicing from there.
Why JustPaid for usage billing?
High-level view of metering, billing, and customer visibility — not a complete vendor matrix
| Capability | JustPaid | In-House | Stripe | Metronome |
|---|---|---|---|---|
| Real-time usage metering | ||||
| Tiered, metered & usage pricing | ||||
| Customer portal (subscriptions & invoices) | ||||
| AI-assisted collections & AR workflow | ||||
| Accounting sync (QBO / Xero) | ||||
| Contract management | ||||
| Typical product focus | Meter → invoice → AR | Custom stack | Payments & Billing | Usage & pricing engine |
Talk to a founder
See how JustPaid handles usage-based billing for companies like yours. 30-minute demo, no strings attached.