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Software · head to head

Amp vs Cartesia

A

Amp

Software

Amp is the frontier agent

From
On request
Rated
-
Full reviewWebsite
Cartesia logo

Cartesia

Software

Real-time voice AI platform for speech generation, transcription, and voice agents

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Cartesia has a free tier, so it costs nothing to try first.
  • Each has a real cost: Amp purchased credits expire 12 months after purchase and subscription usage expires monthly, and Enterprise workspaces are billed at a 50 percent markup over individual and team rates, as of August 2026.; Cartesia instant and professional voice cloning are gated behind paid Pro and Startup tiers, unavailable on the free plan.

Where they differ

Only the attributes on which Amp and Cartesia actually diverge.

Attributes where Amp and Cartesia differ
AttributeAmpCartesia
Starting priceOn requestFree
Pricing modelusage-basedfreemium
Free tierNoYes
PlatformsWebweb, api

Identical on both: user rating (Not yet rated), category (Unknown).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Amp

Nothing recorded that Cartesia does not also cover.

Only in Cartesia

  • Sonic text-to-speech
  • Ink speech-to-text
  • Line voice agent platform
  • Instant and professional voice cloning
  • Flexible deployment
  • Telephony integration

What people use each for

The jobs each tool is most often brought in to do.

Amp

No use cases recorded yet. See the Amp review.

Cartesia

  • Building low-latency voice agents for customer supportnot Amp
  • Real-time transcription for conversational applicationsnot Amp
  • Voice cloning for branded synthetic voicesnot Amp
  • On-device or on-premise voice AI for regulated industriesnot Amp

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Amp

  • Purchased credits expire 12 months after purchase and subscription usage expires monthly, and Enterprise workspaces are billed at a 50 percent markup over individual and team rates, as of August 2026.

Cartesia

  • Instant and professional voice cloning are gated behind paid Pro and Startup tiers, unavailable on the free plan.
  • Voice agent calls carry a separate per-minute usage fee ($0.06/minute) on top of subscription credits.
  • Enterprise features like SSO and BAAs require a custom sales conversation rather than self-serve upgrade.
  • Free tier concurrency limits (2 TTS, 8 STT concurrent requests) may be restrictive for testing production-like load.

Pricing, plan by plan

Amp

On request

No published plan breakdown. See the Amp review.

Cartesia

Free
  • FreeFree
    • 20,000 credits/month
    • TTS and STT included
    • 2 concurrent TTS requests, 8 concurrent STT requests
  • Pro$4/month
    • 100,000 credits/month
    • Commercial use license
    • Instant voice cloning
  • Startup$39/month
    • 1.25M credits/month
    • Professional voice cloning
    • Organizations support
  • Scale$239/month
    • 8M credits/month
    • Priority support
    • High concurrency limits

Which should you pick?

Choose Amp if

Nothing in the data separates Amp from Cartesia on the points above - pick on price and on how each one feels to use.

Amp review

Choose Cartesia if

  • You need sonic text-to-speech.
  • You want to start without paying.
  • You work on web, api.
  • You also want ink speech-to-text.
Cartesia review

Questions people ask

Is Amp or Cartesia better?
Neither clearly leads. Amp starts at On request and Cartesia at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Amp or Cartesia?
Cartesia has a free tier; the other does not. Paid plans start at On request for Amp and Free for Cartesia.
Does Amp or Cartesia run on more platforms?
Amp runs on Web. Cartesia runs on web, api.
Can I use Cartesia for free?
Yes. Cartesia has a free tier, so you can try it without paying. Amp starts at On request.
What can Amp do that Cartesia cannot?
Cartesia covers Sonic text-to-speech, Ink speech-to-text, Line voice agent platform, Instant and professional voice cloning.

Answered from the vendors’ own pages

Cartesia: What does Cartesia cost?

Cartesia offers a free plan, Pro at $4/month, Startup at $39/month, Scale at $239/month, and custom Enterprise pricing, each including a monthly credit allotment, with annual billing saving 20%.

Source
Cartesia: Is there a free plan, and what are its limits?

The Free plan includes 20,000 credits per month, both TTS (Sonic) and STT (Ink), 2 concurrent TTS requests, 8 concurrent STT requests, and 1 voice agent slot.

Source
Cartesia: How is usage metered?

Usage draws down a monthly credit allotment, with voice agent calls additionally billed at $0.06/minute and telephony via Cartesia phone numbers at $0.014/minute.

Source
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