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AI · head to head

Cartesia vs Mmhmm

Cartesia logo

Cartesia

AI

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

From
Free
Rated
-
Full reviewWebsite
Mmhmm logo

Mmhmm

Remote Work

Presentation platform for video calls

From
$10/month
Rated
-
Full reviewWebsite

The short version

  • Only Cartesia has a free tier, so it costs nothing to try first.
  • Each has a real cost: Cartesia instant and professional voice cloning are gated behind paid Pro and Startup tiers, unavailable on the free plan.; Mmhmm renamed to Airtime and split into four separate tools, Camera, Recorder, Creator and Stacks, rather than the single app the mmhmm name refers to
  • They diverge on capability: Cartesia covers Sonic text-to-speech, Mmhmm covers Custom layouts.

Where they differ

Only the attributes on which Cartesia and Mmhmm actually diverge.

Attributes where Cartesia and Mmhmm differ
AttributeCartesiaMmhmm
Starting priceFree$10/month
Free tierYesNo
Platformsweb, apiDesktop Mac, Desktop Windows
CategoryAIRemote Work
FoundedUnknown2020

Identical on both: pricing model (freemium), user rating (Not yet rated).

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 Cartesia

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

Only in Mmhmm

  • Custom layouts
  • Screen sharing
  • Virtual backgrounds
  • Picture-in-picture
  • Recording
  • Zoom
  • Google Meet
  • Microsoft Teams

What people use each for

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

Cartesia

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

Mmhmm

  • Putting a presenter on screen over slides during a video callnot Cartesia
  • Recording a screen walkthrough up to an hournot Cartesia
  • Adding effects and reactions to a webcam feednot Cartesia
  • Collecting materials for a meeting in a shared stacknot Cartesia

Where each one falls short

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

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.

Mmhmm

  • Renamed to Airtime and split into four separate tools, Camera, Recorder, Creator and Stacks, rather than the single app the mmhmm name refers to
  • Screen recordings are capped at one hour
  • Windows support requires Windows 10 or 11
  • Pricing is not shown on the product pages

Pricing, plan by plan

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

Mmhmm

$10/month
  • Individual$10/month
    • Single user
    • Unlimited meetings and recordings
    • No storage or time limits
  • Individual Annual$120/year
    • Single user
    • 17% savings vs monthly billing
  • Team$10/month
    • Per-seat billing
    • Admin dashboard
    • Centralized billing
  • Team Annual$120/year
    • Per-seat billing
    • 17% savings vs monthly

Which should you pick?

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

Choose Mmhmm if

  • You need custom layouts.
  • You work on Desktop Mac, Desktop Windows.
  • You also want screen sharing.
Mmhmm review

Questions people ask

Is Cartesia or Mmhmm better?
Neither clearly leads. Cartesia starts at Free and Mmhmm at $10/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Cartesia or Mmhmm?
Cartesia has a free tier; the other does not. Paid plans start at Free for Cartesia and $10/month for Mmhmm.
Does Cartesia or Mmhmm run on more platforms?
Cartesia runs on web, api. Mmhmm runs on Desktop Mac, Desktop Windows.
Can I use Cartesia for free?
Yes. Cartesia has a free tier, so you can try it without paying. Mmhmm starts at $10/month.
What is Cartesia best used for?
Cartesia is most often used for building low-latency voice agents for customer support, real-time transcription for conversational applications, voice cloning for branded synthetic voices, on-device or on-premise voice ai for regulated industries. Of those, building low-latency voice agents for customer support and real-time transcription for conversational applications are not what Mmhmm is typically brought in for.
What can Cartesia do that Mmhmm cannot?
Cartesia covers Sonic text-to-speech, Ink speech-to-text, Line voice agent platform, Instant and professional voice cloning. Mmhmm covers Custom layouts, Screen sharing, Virtual backgrounds, Picture-in-picture.

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
Mmhmm: How much does Airtime cost?

Airtime (formerly mmhmm) costs 10 USD/month for Individual plan or 120 USD/year with annual billing providing 17% savings. Team plans also charge 10 USD per seat per month or 120 USD per seat per year.

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
Mmhmm: Is there a free trial?

Yes, a 14-day free trial is available with full access to Creator, Camera, and Stacks. Recorder feature is limited to 5 recordings of 5 minutes each during trial. No credit card required.

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
Mmhmm: What are the seat limits?

Individual plan supports single user; Team plan uses per-seat billing with volume discounts available for 20+ users under Enterprise plan.

Source
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