1. Uber (not ad-funded)
2. Xiaomi (not ad-funded)
3. Airbnb (not ad-funded)
4. Palantir (not ad-funded)
5. Snapchat (ad-funded)
6. Didi Kuaidi (not ad-funded)
7. Flipkart (not ad-funded)
8. SpaceX (not ad-funded)
9. Pinterest (ad-funded)
10. Dropbox (not ad-funded)
11. WeWork (not ad-funded)
12. Lufax (not ad-funded)
13. Theranos (not ad-funded)
14. Spotify (not ad-funded)
15. DJI (not ad-funded)
16. Zhong An (not ad-funded)
17. Meituan (ad-funded)
18. Square (not ad-funded)
19. Snapdeal (ad-funded)
20. Stripe (not ad-funded)
It just keeps going like this. These aren't even ad-ecosystem companies. I'm not sure how far down the list you'd have to go to find an adtech firm.