Pricing for every stage.

No. TTS, STT and voice agents each have their own concurrency pool, so you can run all three at once without one using another's capacity.

Every plan includes two monthly allowances:

• Credits for the speech models, spent on TTS and STT at their rates.
• Prepaid dollars for voice agents, at no extra cost.

For example, Scale costs $299/month and includes 8M credits plus $299 for voice agents. Free includes $1 for voice agents. Enterprise pricing is custom.

At the standard $0.03/minute rate, each plan's prepaid agent dollars cover about:

• Free: 33 minutes
• Pro: 2 hours, 47 minutes
• Startup: 27 hours, 13 minutes
• Scale: 166 hours, 7 minutes

These numbers do not include telephony or LLM usage.

• Sonic text-to-speech: 1 credit per character, about 750 to 800 credits per minute of audio.
• Ink speech-to-text: 3 credits per second of audio, or $0.39 per hour on the Scale plan.

Training a Professional Voice Clone is free. Speech from a clone costs 1 credit per character, unless your Enterprise plan says otherwise.

Slots come with your plan and are counted per organization:

• Startup: 2 slots
• Scale: 4 slots
• Enterprise: custom
• Free and Pro: none

More answers are in the Pro Voice Cloning FAQ.

You keep every credit you have paid for. Your rollover cap resets to 2x your new plan's monthly credits. Once your balance drops below it, credits roll over again up to the new cap.

The new tier's credits are added to your current balance right away. With rollover, you can hold up to 2x your monthly credits.

You keep your credits until you use them. Your account stays on its current tier until the end of the billing period, then moves to the new one.

Every month on your purchase date. A plan bought on March 31 renews on April 30, May 31 and so on.

Paid plans can turn on overages and keep going past a zero balance, at a rate set by tier:

• Pro: $65 per 1M credits
• Startup: $45 per 1M credits
• Scale: $38 per 1M credits

With overages off, new requests are blocked once your credits run out.

Overages are off by default on Pro, Startup, and Scale plans, so new calls stop once your voice agent balance reaches $0. To keep calls running, an organization admin can turn overages on from the Subscription page: click Enable on the Allow overages banner, or open Manage subscription and switch on Enable overages. You need a payment method on file. Once overages are on, usage past your balance is charged at the same rates as your plan's included voice agent usage. Overages aren't available on the Free plan.

Overages are billed when your plan renews, for the usage past your balance in the billing period that just ended.

Each break tag counts as 1 credit in the transcript of a TTS request.

Yes. Cartesia is SOC 2 Type II certified.

Yes. Talk to our sales team about your setup.