/
Log inGet free API keyAccount
Menu
CompaniesTechnologiesAI indexDocsPricingChrome extensionLog inAccount

Technologies / Cartesia / WellSaid Labs

Companies using Cartesia and WellSaid Labs

2 companies in our data have public evidence for both Cartesia and WellSaid Labs, and 2 name both in their own subprocessor list. Each company below links to the source for every claim. Our coverage is partial, so this is not everyone.

2companies use both
3%of Cartesia users
100%of WellSaid Labs users
2name both as subprocessors

The companies

Strongest evidence first: a company naming both in its own subprocessor list comes before one seen on its website or in job postings.

Subprocessor listPrivacy policyWebsiteJob postings

CompanyCartesiaWellSaid Labs
Everliteverlit.audioEverlit turns published articles into audio, social video, and podcasts inside existing publishing workflows such as CMS and WordPress.AI and machine learningMedia and entertainment
Synthesiasynthesia.ioSynthesia provides an AI video and avatar platform for creating, translating, and managing videos.AI and machine learning

The two technologies

Cartesia

AI and LLM providers

Cartesia is a company offering speech models and voice agents, including Sonic for text-to-speech and Ink for speech-to-text, delivered through an API. Its voice agents answer and make phone calls, and the models are designed for fast, real-time conversation.

Summarized from cartesia.ai on 8 Nov 2026.

3% of the 78 companies we see using Cartesia also show the other.

All 78 companies using Cartesia69 name it as a subprocessorMore in AI and LLM providers

WellSaid Labs

AI and LLM providers

WellSaid is an AI voice product that turns written scripts into realistic voiceovers, made in partnership with professional voice actors. It is used to create voiceover content such as marketing campaigns, tutorial videos, product launches, social media ads, and corporate training.

Summarized from wellsaid.io on 8 Nov 2026.

100% of the 2 companies we see using WellSaid Labs also show the other.

All 2 companies using WellSaid LabsMore in AI and LLM providers

Other pairs

Companies with their own evidence for both.

More with Cartesia

Cloudflare78companiesGoogle Workspace63companiesOpenAI62companiesAnthropic53companiesElevenLabs50companiesAmazon Web Services49companies

Questions

How many companies use both Cartesia and WellSaid Labs?

2 companies in StrataDB's data have public evidence for both, and 2 of them name both in their own subprocessor list, the strongest evidence we hold. Our coverage is partial, so the real number is higher.

Which companies use Cartesia and WellSaid Labs?

Everlit and Synthesia. Each one links to the evidence behind it.

How does StrataDB know a company uses Cartesia and WellSaid Labs?

From four kinds of public evidence: subprocessor lists, privacy policies, website code and job postings. Each is kept apart with its source and the date we saw it. A company missing here means we found no evidence, not that it does not use them.

Find every company using Cartesia and WellSaid Labs

See the full list with the source for each company, and run the same lookup for any technology from the API, Claude or your browser.

  • Every company and vendor, with its public source
  • 100 API calls a month, plus MCP and the Chrome extension
  • Work email only. No card, no sales call