ads.txt Company Ranking

adstxtlab constantly crawls the web for ads.txt files and monitors their results. While doing that, we get a deep insight in how the advertising world looks like. With this data we create a monthly ranking of companies that are listed in the ads.txt files around the world. Here is the current top 50:

Top 50 company ranking

#CompanyLast month
1. Google 1 (+/-0)
2. AppNexus 2 (+/-0)
3. Rubicon Project 3 (+/-0)
4. PubMatic 7 (+3)
5. Index Exchange 4 (-1)
6. OpenX 5 (-1)
7. PulsePoint 6 (-1)
8. One by AOL 8 (+/-0)
9. SpotX 9 (+/-0)
10. FreeWheel 11 (+1)
11. Sovrn 10 (-1)
12. Smart RTB+ 12 (+/-0)
13. Telaria (fka Tremor Video) 13 (+/-0)
14. Fyber 14 (+/-0)
15. LKQD 15 (+/-0)
16. Amazon 17 (+1)
17. bRealtime 16 (-1)
18. Criteo 18 (+/-0)
19. Improve Digital 21 (+2)
20. District M 19 (-1)
21. Teads 20 (-1)
22. GumGum 22 (+/-0)
23. Taboola 24 (+1)
24. AdForm 23 (-1)
25. SpringServe 29 (+4)
26. Sonobi 25 (-1)
27. 33Across 26 (-1)
28. Conversant 34 (+6)
29. BrightRoll from Yahoo! 32 (+3)
30. TidalTV 28 (-2)
31. Sekindo 30 (-1)
32. Sharethrough 33 (+1)
33. Bidfluence 37 (+4)
34. Video Intelligence 39 (+5)
35. TripleLift 31 (-4)
36. ucfunnel 42 (+6)
37. COMET 35 (-2)
38. AdYouLike 40 (+2)
39. Inneractive 36 (-3)
40. RhythmOne 27 (-13)
41. Synacor 41 (+/-0)
42. Exponential 43 (+1)
43. Optimatic 45 (+2)
44. Yieldmo 44 (+/-0)
45. Switch Concepts 49 (+4)
46. Tribal Fusion 48 (+2)
47. WideOrbit 50 (+3)
48. Bidtellect 56 (+8)
49. Kargo 51 (+2)
50. Facebook 52 (+2)

Want to know more?

The full list of more than 250 companies is available on request. Please get in touch with us.

What's ads.txt?

Ads.txt stands for "Authorized Digital Sellers". It is a mechanism on how a publisher/website owner can tell potential buyers that the traffic they are buying is valid. It also tells the buyer that the SSP/DSP from which they are receiving the traffic is wanted/allowed by the publisher. This prevents third parties ("ad-frauders") to send traffic to buyers and claim that the traffic originates from your website (by falsifying the referrer domain in the bid-request). Read more