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AI · head to head

Cartesia vs Otter.ai

Cartesia logo

Cartesia

AI

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

From
Free
Rated
-
Full reviewWebsite
Otter.ai logo

Otter.ai

Remote Work

Transcription and meeting notes powered by AI

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Cartesia instant and professional voice cloning are gated behind paid Pro and Startup tiers, unavailable on the free plan.; Otter.ai two separate limits apply at once, a monthly minute allowance and a per conversation cap, so a long meeting can be cut short with allowance remaining
  • They diverge on capability: Cartesia covers Sonic text-to-speech, Otter.ai covers Automatic transcription.

Where they differ

Only the attributes on which Cartesia and Otter.ai actually diverge.

Attributes where Cartesia and Otter.ai differ
AttributeCartesiaOtter.ai
Platformsweb, apiWeb, Ios, Android, Mac
CategoryAIRemote Work
FoundedUnknown2016

Identical on both: starting price (Free), pricing model (freemium), free tier (Yes), 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 Otter.ai

  • Automatic transcription
  • Real-time transcription
  • Speaker identification
  • Searchable transcripts
  • Highlights and summaries
  • Sharing
  • Mobile apps
  • Zoom

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 Otter.ai
  • Real-time transcription for conversational applicationsnot Otter.ai
  • Voice cloning for branded synthetic voicesnot Otter.ai
  • On-device or on-premise voice AI for regulated industriesnot Otter.ai

Otter.ai

  • Meeting transcription and recordingnot Cartesia
  • Live transcription for accessibilitynot Cartesia
  • Multi-language meeting supportnot 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.

Otter.ai

  • Two separate limits apply at once, a monthly minute allowance and a per conversation cap, so a long meeting can be cut short with allowance remaining
  • The free plan cuts off at 30 minutes per conversation and 300 minutes a month
  • The Pro plan still caps a single conversation at 90 minutes
  • Even unlimited plans cap a conversation at 4 hours
  • Imported file transcription has its own separate monthly limit, at 6,000 minutes on Business
  • Paying monthly rather than annually roughly doubles the rate, from $8.33 to $16.99 on Pro

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

Otter.ai

Free
  • BasicFree
    • 300 monthly transcription minutes
    • 3 lifetime audio/video file imports
    • Zoom, MS Teams, Google Meet support
  • Pro$16.99/month
    • 1,200 in-app recording minutes
    • 10 monthly audio/video file imports
    • Up to 90 minutes per meeting
  • Pro Annual$8.33/month
    • 1,200 in-app recording minutes
    • 10 monthly audio/video file imports
    • Up to 90 minutes per meeting
  • Business$30/month
    • Unlimited meetings and in-app recordings
    • Unlimited audio/video file imports
    • Up to 4 hours per meeting

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 Otter.ai if

  • You need automatic transcription.
  • You want to start without paying.
  • You work on Web, Ios, Android, Mac.
  • You also want real-time transcription.
Otter.ai review

Questions people ask

Is Cartesia or Otter.ai better?
Neither clearly leads. Cartesia starts at Free and Otter.ai at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Cartesia or Otter.ai?
Cartesia starts at Free and Otter.ai at Free.
Does Cartesia or Otter.ai run on more platforms?
Cartesia runs on web, api. Otter.ai runs on Web, Ios, Android, Mac.
Can I use Cartesia for free?
Both have a free tier, so you can try either at no cost before committing.
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 Otter.ai is typically brought in for.
What can Cartesia do that Otter.ai cannot?
Cartesia covers Sonic text-to-speech, Ink speech-to-text, Line voice agent platform, Instant and professional voice cloning. Otter.ai covers Automatic transcription, Real-time transcription, Speaker identification, Searchable transcripts.

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
Otter.ai: What are the monthly transcription minute limits on Otter.ai plans?

Basic tier includes 300 monthly transcription minutes at no cost. Pro tier includes 1,200 in-app recording minutes. Business tier provides unlimited meetings and in-app recordings.

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
Otter.ai: What meeting duration limits apply to different Otter.ai tiers?

Pro tier supports up to 90 minutes per meeting. Business tier supports up to 4 hours per meeting. Enterprise tier offers custom configurations.

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
Otter.ai: How much can you save with Otter.ai annual billing?

Pro annual plan costs $8.33 per month (51% savings compared to $16.99 monthly). Business annual plan costs $19.99 per month (33% savings compared to $30 monthly).

Source
Otter.ai: What integrations are available with Otter.ai Pro plan?

Pro tier includes integrations with Salesforce, HubSpot, and Zapier. Enterprise tier provides access to Otter API and custom webhooks.

Source
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