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C
Cartesia
cartesia.ai · San Francisco, United States
Looking legit

Upwork lists Cartesia at $763k in client spend.

$762,754 in published client spend across 50 contracts. The full read below — free.

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Total Upwork spend
$763k
$762,754
Top category
Video, animation & audio
40 of 50 contracts
Hiring status
Actively hiring
25 of 50 contracts in progress
Contracts on record
50
$15–20/hr listed
The company

Who's actually behind the account.

Upwork hides the client's identity. We resolve it to a real company, then layer in public firmographics — the context you never get on the job page.

C
Cartesia
“Accelerate the development of AI applications”
Resolved to cartesia.ai · High confidence
Industry
Software development
Company size
500–1,000 employees
Founded
1997
Est. revenue
$10M–50M
Web traffic
10M–50M visits/mo
Headquarters
San Francisco, California, United States
Links
Rate X-Ray

What the blended average hides

The buyer runs two distinct pay streams: quick test gigs at roughly $50 and larger $500 recording sessions, while ongoing evaluator work pays about $15–$20/hr; treat the headline as a mix — quote fixed recording scopes on their own and expect evaluator work to be commodity hourly rates.

Every listed hourly rate · 10 of 50 contracts
median $18/hr · avg ~$18/hr
7
3
$0$40$80$120$160$200
median $18/hr avg ~$18/hr — dragged up by two $190–200 contracts
Budget · 10 contracts $15–20
What they hire for

Where the work actually is

All 50 contracts by category. Video, animation & audio leads with 40 of 50 contracts.

Video, animation & audio 40
QA & testing 10
Hiring activity

Hiring right now, not last year.

When the contracts on record started — and how they're structured. 25 of 50 are still in progress.

Contracts started, by month
38
May 2026
12
Jun 2026
Status
25in progress · 25completed
Contract type
10hourly · 40fixed-price
Open roles

Jobs they've posted publicly

Links go to Upwork ↗
Audio and Language Evaluator — English (Singapore) Aug 25, 2026·3 to 6 months Audio and Language Evaluator — Dutch (Netherlands) Aug 25, 2026·3 to 6 months Audio and Language Evaluator — Arabic (UAE) Aug 20, 2026·3 to 6 months Audio and Language Evaluator — Mandarin (China) Aug 20, 2026·3 to 6 months Audio and Language Evaluator — Korean (Korea) Aug 20, 2026·3 to 6 months Audio and Language Evaluator — English (Australia) Aug 20, 2026·3 to 6 months Audio and Language Evaluator — Portuguese (Brazil) Aug 20, 2026·3 to 6 months Audio and Language Evaluator — Japanese (Japan) Aug 20, 2026·3 to 6 months
Postings Upwork has shown for this client. Some may have since closed.

Every contract on record — all 50

Freelancer names removed · roles only
RoleRateBilled
Audio Evaluator - TSS Cantonese$20/hr$165
Audio Evaluator - TSS (Thai)$18/hr$106
Audio Evaluator - TSS Cantonese$16/hr$73
Audio Evaluator - TSS Cantonese$18/hr$43
Audio Evaluator - TSS French (Parisian)$15/hr$38
Audio Evaluator - TSS Portuguese (Brazil)$18/hr$36
Audio Evaluator - TSS Portuguese (Brazil)$16/hr$29
English (South Africa) Voice Artist
English (Ireland) Voice Artist
Australian Voice Artist
French (Belgium) Voice Artist
English (South Africa) Voice Artist
English (Scotland) Voice Contributors Wanted
English (South Africa) Voice Artist
English (South Africa) Voice Artist
Mandarin (Taiwan) Voice Artist
English (South Africa) Voice Artist
English (South Africa) Voice Artist
Singapore English Voice Artist
New Zealand Voice Artist
New Zealand Voice Artist
Australian Voice Artist
Audio Evaluator - TSS Cantonese$20/hr
Audio Evaluator - TSS Cantonese$18/hr
Audio Evaluator - TSS English (Singaporean)$20/hr
Australian Voice Artistfixed
Calling Hebrew Vocalists: Lend Your Voice to the Future of AIfixed
English (British) Female Voice Contributors Wantedfixed
Female (British) Voice Artistfixed
Native Spanish (Mexico) Speakers for AI — No Professional Voice Acting Experience Neededfixed
English (British) Female Voice Contributors Wantedfixed
English (Scotland) Voice Contributors Wantedfixed
Calling English (UK) Vocalists: Lend Your Voice to the Future of AIfixed
Calling Hebrew Vocalists: Lend Your Voice to the Future of AIfixed
Calling Hebrew Vocalists: Lend Your Voice to the Future of AIfixed
New Zealand Voice Artistfixed
Native Spanish (Mexico) Speakers for AI — No Professional Voice Acting Experience Neededfixed
New Zealand Voice Artistfixed
Calling English (UK) Vocalists: Lend Your Voice to the Future of AIfixed
Calling English (UK) Vocalists: Lend Your Voice to the Future of AIfixed
Australian Voice Artistfixed
New Zealand Voice Artistfixed
Calling English (UK) Vocalists: Lend Your Voice to the Future of AIfixed
Calling English (UK) Vocalists: Lend Your Voice to the Future of AIfixed
Female (French Canadian) Voice Artistfixed
Australian Voice Artistfixed
English (Australian) Voice Contributors Wantedfixed
English (Australian) Voice Contributors Wantedfixed
Calling Hebrew Vocalists: Lend Your Voice to the Future of AIfixed
Australian Voice Artistfixed
"—" = no rate or billed amount listed (fixed-price or open). Billed is what Upwork shows to date.
Treatment verdict

How they hire, and how they treat people

This buyer runs high-volume, language-specific voice and audio-evaluation work (mix of short fixed recordings and ongoing hourly evaluation) and hires many freelancers simultaneously.

Reputation
Uniformly high with one notable low outlier — nearly all freelancer→client reviews are 5★ except a single 1★ about a sample rejection.. Clear, detailed instructions, organized sessions, and prompt payment as recurring positives mentioned by freelancers.
The catch — ratings are uninformative
The buyer consistently gives brief, repetitive 5★ replies (mostly 'Great work!') with little individualized feedback, suggesting outbound ratings are generous and often boilerplate rather than detailed.
How they engage
Work is mostly short, discrete gigs (one-off recording sessions and micro-tests) plus repeated small-hourly evaluator assignments rather than long-form retainers.
Working style
Operates with tightly scoped, prescriptive tasks: clear briefs, step-by-step instructions, organized recording sessions and fast payment; project managers provide structured feedback rather than open-ended direction.
Who wins the work
Freelancers who follow detailed scripts, deliver accurate, on-spec audio quickly, and are comfortable with short, transactional engagements or steady evaluator hours will be a good match.

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