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Cartesia vs PureMIDI

Features, pricing, ratings, and pros and cons, side by side.

Cartesia logo

Cartesia

Real-time speech AI for developers: fast text-to-speech, transcription and voice agents

Freemium
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Verdict

Cartesia and PureMIDI are both Audio & Speech AI tools. Cartesia scores higher in FinderAtlas's editorial review (8.3 vs 7.3 out of 10), led by feature depth and value for money. Both have a free plan or trial. Only Cartesia offers an API.

Best overall

Cartesia

  • Developers
  • Voice AI Engineers
  • Contact Centre Teams
  • Enterprises

Choose Cartesia if

  • You want a tool built for Low-latency voice agents, real-time text-to-speech and streaming transcription inside applications.
  • Published time to first audio of about 90 ms for Sonic 3.6, suited to live conversation.
  • Free tier with 20K credits per month and a $5 Pro plan with commercial use and instant cloning.

Choose PureMIDI if

  • You want a tool built for turning a hummed or played melody, a recorded riff or a PDF score into editable MIDI for a DAW or notation program.
  • Pay-per-use credit packs with no subscription, starting at $4.99 for 30 credits.
  • Failed conversions are not charged.
Best for beginners
PureMIDI
Best for business
Cartesia

Features

17 features compared.

  • Sonic Text-to-Speech
    Cartesia
    Available
    PureMIDI
    Not available
  • Ink Speech-to-Text
    Cartesia
    Available
    PureMIDI
    Not available
  • Managed Agents
    Cartesia
    Available
    PureMIDI
    Not available
  • Voice Cloning
    Cartesia
    Available
    PureMIDI
    Not available
  • Pronunciation Dictionaries
    Cartesia
    Available
    PureMIDI
    Not available
  • Regional API Routing
    Cartesia
    Available
    PureMIDI
    Not available
  • Telephony Support
    Cartesia
    Available
    PureMIDI
    Not available
  • Python and JavaScript SDKs
    Cartesia
    Available
    PureMIDI
    Not available
  • Usage and Access Controls
    Cartesia
    Available
    PureMIDI
    Not available
  • Audio to MIDI
    Cartesia
    Not available
    PureMIDI
    Available
  • Free preview
    Cartesia
    Not available
    PureMIDI
    Available
  • Sheet music to MIDI (Beta)
    Cartesia
    Not available
    PureMIDI
    Available
  • Browser MIDI editor
    Cartesia
    Not available
    PureMIDI
    Available
  • Video and YouTube workflows
    Cartesia
    Not available
    PureMIDI
    Available
  • Format-specific tools
    Cartesia
    Not available
    PureMIDI
    Available
  • DAW and notation compatibility
    Cartesia
    Not available
    PureMIDI
    Available
  • Pay-per-success credits
    Cartesia
    Not available
    PureMIDI
    Available

Pricing

Plans as listed by each vendor. Check their sites for current prices.

  • Pricing model
    Cartesia
    Freemium
    PureMIDI
    Freemium
  • Free plan
    Cartesia
    Yes
    PureMIDI
    Yes
  • Starting price
    Cartesia
    $0
    PureMIDI
    $0
  • Plans
    Cartesia
    5 plans
    PureMIDI
    4 plans

Cartesia plans

  • Free

    $0

    Entry tier for testing text-to-speech and transcription

    • 20K credits/month
    • Text to Speech
    • Speech to Text
    • 2 concurrent TTS requests
    • 1 phone number

  • Pro

    $5/month

    Individuals building with commercial use rights

    • 100K credits/month
    • commercial use license
    • instant voice cloning
    • 3 concurrent TTS requests

  • Startup

    $49/month

    Small teams shipping voice products

    • 1.25M credits/month
    • professional voice cloning (2 slots)
    • Organizations
    • 5 concurrent TTS requests

  • Scale

    $299/month

    Higher-volume production workloads

    • 8M credits/month
    • priority support
    • high concurrency
    • 15 concurrent TTS requests
    • 4 professional voice clone slots

  • Enterprise

    Custom/custom

    Large organizations with custom requirements

    • Custom limits
    • DPAs and BAAs
    • SSO
    • shared Slack channel
    • security questionnaire support

PureMIDI plans

  • Free account

    $0

    Free previews and a small starter credit gift

    • Audio preview up to 30 seconds
    • First-page preview of PDF scores
    • 2 gift credits for eligible new accounts valid 14 days

  • Starter

    Most popular

    $4.99/one-time

    30 credits, the pack the site marks as recommended

    • 30 credits
    • About 30 single-melody conversions
    • About 7 PDF or image score conversions
    • About 2 to 5 full songs

  • Standard

    $9.99/one-time

    100 credits

    • 100 credits
    • About 100 single-melody conversions
    • About 25 score conversions
    • About 6 to 16 full songs

  • Pro

    $19.99/one-time

    300 credits

    • 300 credits
    • About 300 single-melody conversions
    • About 75 score conversions
    • About 20 to 50 full songs

Our ratings

Scored out of 10 by the Finder Atlas editorial team. Last reviewed October 2026.

Cartesia
8.3overall
PureMIDI
7.3overall

Cartesia leads in 4 categories and PureMIDI in 1.

  • Ease of Use

    PureMIDI leads by 0.2
    Cartesia
    7.8
    PureMIDI
    8.0

  • Feature Depth

    Cartesia leads by 1.0
    Cartesia
    8.5
    PureMIDI
    7.5

  • Value for Money

    Cartesia leads by 0.7
    Cartesia
    8.2
    PureMIDI
    7.5

  • Performance & Speed

    Cartesia leads by 2.0
    Cartesia
    9.0
    PureMIDI
    7.0

  • Documentation & Support

    Cartesia leads by 1.7
    Cartesia
    8.2
    PureMIDI
    6.5

Scores weigh documented features, plan value, platform coverage, integrations and user feedback. A missing score means we have not rated that area yet.

Pros and cons

Cartesia

Pros

  • Published time to first audio of about 90 ms for Sonic 3.6, suited to live conversation.
  • Free tier with 20K credits per month and a $5 Pro plan with commercial use and instant cloning.
  • One platform covers text-to-speech, speech-to-text and managed voice agents.
  • Regional endpoints in the US, EU and APAC, with on-premise and on-device options.
  • Frequent releases: the changelog shows monthly model, voice and API updates in 2026.
  • Ranked first on Artificial Analysis speech leaderboards according to the company.

Cons

  • The free tier has no instant voice cloning, only 2 concurrent TTS requests and no commercial license.
  • Credit-based billing with overage up to $65 per 1M credits can be hard to forecast as usage grows.
  • Independent reviews note a smaller preset voice library than some narrative-focused competitors.
  • Developer-oriented; there is no consumer app and no released iOS or Android app.

PureMIDI

Pros

  • Pay-per-use credit packs with no subscription, starting at $4.99 for 30 credits
  • Failed conversions are not charged
  • Free previews let users check quality before spending credits
  • Covers audio, video, sheet music and existing MIDI in one workspace, with MusicXML export
  • In-browser multi-track editor with piano-roll, notation and guitar TAB views
  • States a clear retention policy (successful uploads deleted within 3 days)

Cons

  • No named legal entity, address or founding date on the site
  • No public API and no native app
  • Paid charges are non-refundable except where required by law
  • Sheet-music, PDF and drum conversion are labeled Beta, and AI Music generation and Text to MIDI are only waitlisted
  • 25 MB upload limit and full-song conversions cost 6 to 15 credits each

Platforms

  • Web
    Cartesia
    Supported
    PureMIDI
    Supported
  • Windows
    Cartesia
    Not supported
    PureMIDI
    Not supported
  • macOS
    Cartesia
    Not supported
    PureMIDI
    Not supported
  • iOS
    Cartesia
    Not supported
    PureMIDI
    Not supported
  • Android
    Cartesia
    Not supported
    PureMIDI
    Not supported
  • API
    Cartesia
    Supported
    PureMIDI
    Not supported
  • Browser Extension
    Cartesia
    Not supported
    PureMIDI
    Not supported

Integrations

Cartesia

3 integrations
  • Twilio
  • Anthropic
  • OpenAI

PureMIDI

No integrations listed.

Company

  • Company
    Cartesia
    Cartesia
    PureMIDI
    PureMIDI
  • Founded
    Cartesia
    2023
    PureMIDI
    Not listed
  • Headquarters
    Cartesia
    San Francisco, CA
    PureMIDI
    Not listed
  • Listing
    Cartesia
    Claimed
    PureMIDI
    Claimed

Frequently asked questions

Is Cartesia better than PureMIDI?

It depends on your workflow. Cartesia is built for Low-latency voice agents, real-time text-to-speech and streaming transcription inside applications. PureMIDI is built for turning a hummed or played melody, a recorded riff or a PDF score into editable MIDI for a DAW or notation program.

What are the key feature differences between Cartesia and PureMIDI?

Cartesia: Real-time speech AI for developers: fast text-to-speech, transcription and voice agents. PureMIDI: Convert audio and sheet music to editable MIDI, then refine it in your browser.

Does Cartesia or PureMIDI have a free plan?

Yes, both do. Cartesia is freemium and PureMIDI is freemium, and each has a free plan or trial.

Which is cheaper, Cartesia or PureMIDI?

Both can be used for free. Paid plans differ in limits and features, so compare the tiers in the pricing table above.