Influencer marketing for San Francisco AI startups
GrowthMatrix runs creator-led launches on X and LinkedIn for AI and tech startups, including teams in San Francisco. We have worked with San Francisco companies such as Cartesia, whose founder launch post for Sonic-3.5 reached 7.1M views, and Tavus (YC S21), whose Phoenix-4 launch reached 2.09M views.
We work with San Francisco startups remotely. We don't have a San Francisco office.
Why San Francisco launches happen on X
Many of the people a San Francisco AI startup wants to reach (founders, engineers, investors and early adopters) talk about new products on X first. A launch that gets picked up there often reaches the press and LinkedIn a day or two later. The hard part is getting the right people to see it in the first hours, before the post slows down.
San Francisco launches we've worked on
| Company | Launch | Result |
|---|---|---|
| Cartesia | Sonic-3.5 and Ink-2, founder launch post (15 June 2026) | 7.1M views, about 340 times the founder's following |
| Cartesia | Sonic-3.6 (27 August 2026) | 2.4M views |
| Tavus (YC S21) | Phoenix-4 (18 February 2026), creator threads and quote reposts | 2.09M views, 1,437 bookmarks |
| Tavus (YC S21) | Phoenix-3 (6 March 2025) | 581K views |
Public counts on each post as of 10 October 2026.
How a launch works with us
- You send one brief: what you're launching, when, and who should hear about it.
- We pick creators from a network of 500+ vetted AI and tech voices whose followers match your buyers.
- Creators write in their own voice, and you approve every post before it goes live.
- The posts go live with your release, so the launch gets its reach in the first hours.
- You get a recap with views, engagement and reposts, and a recommendation on what to run next.
Built for the way Bay Area teams launch
- Model and research releases that need a creator to explain them, like Tavus's Phoenix-4.
- Founder launch posts that need reach beyond the founder's own followers, like Cartesia's Sonic-3.5.
- YC batch launches around Demo Day. See our guide: How YC startups launch.
FAQ
Do you have a San Francisco office?
No. We work with San Francisco startups remotely, and launches on X and LinkedIn don't depend on where the agency sits.
Which San Francisco companies has GrowthMatrix worked with?
Cartesia and Tavus are two of them. Cartesia's founder post for Sonic-3.5 reached 7.1M views, and Tavus's Phoenix-4 launch reached 2.09M views.
Do you work with YC startups?
Yes. Tavus is a YC company (Summer 2021), and we supported its Phoenix-3 and Phoenix-4 launches on X with creator threads and quote reposts.
Which platforms do you launch on?
X and LinkedIn first, with Instagram and TikTok when the product has a consumer audience.