Pricing for every stage.

No. Each service has its own dedicated concurrency pool, so using TTS won’t impact your STT or Agent concurrency. You can run them all in parallel without sharing capacity.

Your monthly plan gives you both credits for voice models AND dollars for Managed Agents:

Credits for voice models: each plan includes a monthly pool of credits you can use for STT and TTS at their respective rates.

Prepaid dollars for voice agents: today, in addition to credits for voice models, you also now get prepaid dollars per month to use towards voice agents at no additional cost.

For example, the Scale plan, at $299/month, gives you 8M credits/month to use on STT or TTS models. On top of these 8M credits/month, you ALSO get $299/month to spend on Managed Agents. The free plan has $1/mo of prepaid dollars to use towards voice agents. Enterprise plans will have custom pricing.

At a competitive $0.06/minute, these are the approximate agent call minutes per plan:

Free Plan - 17 minutes.

Pro Plan - 1 hour, 23 minutes.

Startup Plan - 13 hours, 37 minutes.

Scale Plan - 83 hours, 3 minutes.

Note that these calculations do not include the costs for fully managed phone numbers. Please take these into account if you opt in.

Sonic text-to-speech: One minute of audio generation requires 750-800 credits. 1 credit equals 1 character.

Ink speech-to-text: One hour of audio is only $0.39 on the Scale plan. 3 credits equals 1 second of audio.

Training a Professional Voice Clone is free. Speech generated with a PVC costs 1 credit per character, unless your custom Enterprise plan specifies otherwise.

PVC slots are included with your plan and counted per organization. Startup includes 2 slots, Scale includes 4 slots, and Enterprise is custom. Free and Pro plans do not include PVC.

For more questions about PVCs, check out this FAQ.

You’ll keep all the credits you’ve already paid for when switching tiers.

Existing credits remain: Nothing is lost when you upgrade or downgrade.

New rollover limit applies: Your rollover cap resets to 2x your new monthly plan rate.

Once your balance drops below this cap, future credits will continue rolling over up to the new limit.

You will automatically get the amount of credits you paid for on that new tier added to your current credit balance! With rollovers, you can accrue up to 2x your monthly rate.

You will keep the credits in your account until you use them. Your account will remain in the same tier until the end of that period, at which time you will automatically be downgraded to the selected tier.

Your subscription will renew monthly from your purchase date. If you purchase on March 31, it will renew on April 30, May 31, etc...

Paid users can turn on overages to go negative into their credit balance. Your overage rate will vary by your subscription tier.

At pro tier, it's $65 per 1M credits. At startup tier, it's $45 per 1M credits. At scale tier, it's $38 per 1M credits.

If your overages are off, new requests will be blocked if all your credits have been consumed.

You will continue paying at the same rate as your plan for voice agents.

This usage-based overage charge will begin incurring once you exceed the limit included in your plan.

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

Yes, Cartesia is SOC 2 Type II certified.

Yes, reach out to our sales team so we can best understand your needs.