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. PulsePoint 4 (+/-0)
5. OpenX 6 (+1)
6. PubMatic 5 (-1)
7. Index Exchange 7 (+/-0)
8. One by AOL 8 (+/-0)
9. SpotX 9 (+/-0)
10. FreeWheel 10 (+/-0)
11. Sovrn 11 (+/-0)
12. Smart RTB+ 12 (+/-0)
13. Telaria (fka Tremor Video) 13 (+/-0)
14. LKQD 16 (+2)
15. Fyber 15 (+/-0)
16. Amazon 14 (-2)
17. District M 17 (+/-0)
18. GumGum 19 (+1)
19. bRealtime 20 (+1)
20. Criteo 18 (-2)
21. Improve Digital 21 (+/-0)
22. Teads 22 (+/-0)
23. 33Across 23 (+/-0)
24. Sonobi 26 (+2)
25. AdForm 24 (-1)
26. Conversant 25 (-1)
27. SpringServe 28 (+1)
28. Taboola 27 (-1)
29. TidalTV 31 (+2)
30. C1X 33 (+3)
31. BrightRoll from Yahoo! 29 (-2)
32. Sekindo 32 (+/-0)
33. Sharethrough 30 (-3)
34. Bidfluence 34 (+/-0)
35. RhythmOne 36 (+1)
36. Video Intelligence 35 (-1)
37. COMET 37 (+/-0)
38. TripleLift 38 (+/-0)
39. ucfunnel 39 (+/-0)
40. Imonomy 43 (+3)
41. Inneractive 40 (-1)
42. AdYouLike 42 (+/-0)
43. Synacor 41 (-2)
44. Yieldmo 44 (+/-0)
45. Smartclip 47 (+2)
46. Bidtellect 46 (+/-0)
47. Tribal Fusion 50 (+3)
48. Exponential 45 (-3)
49. WideOrbit 48 (-1)
50. nativeads.com 54 (+4)

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