Sites using Cartesia
Real-time AI voice synthesis and streaming TTS API
Get told when a new site ships with Cartesia.
Stackdar watches every launch we detect and sends you the ones using Cartesia, by email, Slack or webhook. On every plan, from £15 a month.
See how alerts work27 sites
21 found by StackScope, 6 via launch platforms
- StackScope Discovery (Indie) 18
- StackScope Wider Web 3
- Product Hunt 4
- PeerPush 1
- Other 1
Cartesia has been detected on 27 launches we've crawled. Most recent detection: Finly, on September 23, 2026.
It's most commonly paired with HSTS, Vercel, and Next.js. By product type, the launches using it are most often Education (27%), Health (13%), and Marketing (13%).
What kind of products ship with Cartesia
15 launches
Domain endings using Cartesia
27 sites
- .com 25.93%
- .ai 22.22%
- .app 18.52%
- .io 7.41%
- .ca 3.70%
- .dev 3.70%
- .live 3.70%
- .online 3.70%
- .org 3.70%
Share of new sites using Cartesia
Each dot is one launch day. Line is the 7-day rolling average; weekly averages before July 2026. Chart starts at first detection.
The shaded parts of the chart are measured against a different set of sites.
Grey: until 8 July 2026 we only tracked launches from launch platforms. From that date we crawl the wider web as well.
Amber: on 10 September 2026 we improved our infrastructure so we can index new sites much sooner, often on the day they go live. Sites found that early often haven't finished setting up, so anything usually added after launch reads lower from that date. We record each site as it was when we found it.
The share is a proportion of whatever we were tracking at the time, so it can step at these lines without the technology itself changing. For a single continuous measure, switch to launch platforms.
AI API leaders
| Tool | % of launches | % of category | ||
|---|---|---|---|---|
| #1 | ▼2 |
Anthropic
|
0.07% | 26.25% |
| #2 | ▲1 |
Abacus.AI
|
0.06% | 20.91% |
| #3 | ▲1 |
OpenAI API
|
0.05% | 19.21% |
| #4 | – |
Google Gemini API
|
0.03% | 10.22% |
| #5 | – | One API | 0.02% | 5.52% |
| … | ||||
| #32 | ▼3 | Cartesia Current page | <0.01% | 0.19% |
Percentages show adoption among indie launches: the share of all analysed launches, and of launches using any AI API tool.Among September launches it ranked #37 in AI API, down from #34 in August. All 192 in AI API →
Often used with
| Tool | Sites |
|---|---|
| HSTS | 26 |
Vercel
|
19 |
Next.js
|
16 |
React
|
16 |
Lucide Icons
|
15 |
Tools most often detected on the same sites as Cartesia.
Recent launches we can show
24 of the 27 sites using Cartesia are product launches we list individually. The other 3 are sites we found crawling the wider web: they count towards the figures above, but we do not publish them one by one. How StackScope Discovery works
Finly
Finance
INTELLECTA
Education
The IELTS Bro
Education
KI-Telefonstreich online starten | Carl Calls
Parry — Defend your everyday.
Social
Free AI mock interviews you take out loud · Larpy
Hiring & HR
Sestante — scrivi il tuo libro con l'AI
Supafone - AI Phone Agent That Answers Calls 24/7
Marketing
OrbFit — Just talk. Your coach does the rest.
Health
Untitled site
TAIMS — Team AI Meeting Spaces
Productivity
Studara — Master Anything. Remember Everything.
Education
Showing the most recent 12 of 24.
The StackScope API serves all 27 sites using Cartesia, filterable and exportable, from £15 a month.