# The Billing Engine Behind the Fastest Growing Voice AI Companies

Flexprice meters every minute, conversation, and outcome in real time then handles credits, wallets, and invoicing so your team can focus on the product, not the billing code.

## Trusted by 100+ AI and Agentic Teams

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## Why billing is the hardest infrastructure problem in Voice AI

Most billing tools were built for SaaS subscriptions. Voice AI has a completely different set of challenges.

### You don't know your real margins

Every call hits your STT, LLM, TTS, and telephony provider and each with their own unit and rate.

### Per-minute metering accuracy

A voice call isn't an API call. It runs for unpredictable durations, spans multiple services with different clocks, and your metering has to decide what's billable in real time not after the fact.

### Flexprice saved us thousands of development hours that we would have spent building in-house.

Shaunak Srivastava

Founder, Truffle AI (YC W25)

### Credits and balances are deceptively hard

Selling prepaid minutes or credit packs sounds simple. Then you need real-time balance checks, expiration rules, overdraw prevention under concurrency, and overage billing all without blocking the call.

### Every customer segment wants different pricing

Self-serve wants per-minute. Enterprise wants committed volumes with overage rates. Agencies want per-conversation. You need all three running simultaneously not three billing systems duct-taped together.

## Built for every type of voice AI company

Whether you're powering the infrastructure, running the platform, or building the end product, your billing challenges are different. Flexprice handles all of them.

### Meter at any scale without dropping a single event

- Bulk event APIs and Kafka collectors that keep up with your throughput.
- Tiered and volume pricing that applies automatically.
- Credit grants for annual commits with real-time balance tracking.
- Integrates with Stripe, Razorpay, or Chargebee and other payment gateways.

Before Flexprice, billing required one developer to spend 20-30% of their daily bandwidth. After adopting Flexprice, no developer is dedicated to billing at all.

## From first event to first invoice in hours

Three simple steps. No billing expertise required.

1. Meter voice events - Send events (call start, call end, minutes used, tokens consumed) via our API or SDK.
2. Configure your pricing model - Set up per-minute, credit-based, tiered, or hybrid pricing in the dashboard.
3. Invoice automatically - Flexprice generates line-item invoices showing exactly what your customer consumed. Real-time dashboards keep them in the loop.

## How top teams use Flexprice

**"Flexprice lets us focus on the core business instead of building billing as a second product."**

Shubhendu Shishir

Head of Engineering, Simplismart

#### Faster Pricing Iteration

**"The core implementation was completed in around 2 weeks. The rest was just us finishing the complete migration."**

### Why voice AI teams choose Flexprice

#### Capability

| Feature                         | Flexprice | Other Billing Providers |
|---------------------------------|-----------|------------------------|
| Per-minute metering             | Yes       | No                     |
| Native, real-time               | Yes       | No                     |
| Custom usage records            | Yes       | No                     |
| Multi-component events          | Yes       | No                     |
| Single API call                 | Yes       | Not supported          |
| Credits & wallets                | Yes       | Third-party addon      |
| Pricing model changes           | No-code, instant | Engineering migration |
| Time to implement               | Hours     | Weeks                  |

## Ready to transform your billing infrastructure?

If you're spending valuable engineering time on billing instead of your core product or if you need to scale complex usage-based pricing without the overhead, Flexprice can help.