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
| # | Company | Last month | ||
|---|---|---|---|---|
| 1. | 1 | (+/-0) | ||
| 2. | Rubicon Project | 2 | (+/-0) | |
| 3. | PubMatic | 3 | (+/-0) | |
| 4. | AppNexus | 4 | (+/-0) | |
| 5. |  |
OpenX | 5 | (+/-0) |
| 6. | Index Exchange | 6 | (+/-0) | |
| 7. | Smart RTB+ | 8 | (+1) | |
| 8. |  |
PulsePoint | 10 | (+2) |
| 9. |  |
Sovrn | 7 | (-2) |
| 10. | Improve Digital | 11 | (+1) | |
| 11. | RhythmOne | 9 | (-2) | |
| 12. | One by AOL | 16 | (+4) | |
| 13. | FreeWheel | 23 | (+10) | |
| 14. | Gemini from Yahoo! | 13 | (-1) | |
| 15. | UnrulyX | 12 | (-3) | |
| 16. | Amazon | 14 | (-2) | |
| 17. | SpotX | 27 | (+10) | |
| 18. | bRealtime | 25 | (+7) | |
| 19. | 33Across | 18 | (-1) | |
| 20. | GumGum | 15 | (-5) | |
| 21. | Sharethrough | 17 | (-4) | |
| 22. | onetag.com | 21 | (-1) | |
| 23. | Criteo | 24 | (+1) | |
| 24. | TripleLift | 19 | (-5) | |
| 25. | Telaria (fka Tremor Video) | 30 | (+5) | |
| 26. | Smaato | 29 | (+3) | |
| 27. | Sonobi | 22 | (-5) | |
| 28. |  |
Media.net | 20 | (-8) |
| 29. | AdForm | 32 | (+3) | |
| 30. | LoopMe | 35 | (+5) | |
| 31. | Conversant | 26 | (-5) | |
| 32. | District M | 31 | (-1) | |
| 33. | Bidfluence | 34 | (+1) | |
| 34. | AdYouLike | 36 | (+2) | |
| 35. | Adman Media | 33 | (-2) | |
| 36. | Teads | 37 | (+1) | |
| 37. | Yieldmo | 28 | (-9) | |
| 38. | LKQD | 38 | (+/-0) | |
| 39. | pubnative.net | 41 | (+2) | |
| 40. | inmobi.com | 39 | (-1) | |
| 41. | Synacor | 40 | (-1) | |
| 42. | Outbrain | 46 | (+4) | |
| 43. | richaudience.com | 47 | (+4) | |
| 44. | ad-generation.jp | 42 | (-2) | |
| 45. | e-Planning | 45 | (+/-0) | |
| 46. | Undertone | 44 | (-2) | |
| 47. |  |
AdColony | 52 | (+5) |
| 48. | Smarty Ads | 48 | (+/-0) | |
| 49. | Video Intelligence | 56 | (+7) | |
| 50. | AdMixer | 49 | (-1) |
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
What's ads.cert?
Ads.cert is a standard which is designed to sign and verify messages send via OpenRTB (RTB-Requests), allowing a seller to prove that the sold inventory is valid. A message is signed using private keys and can be verified using public keys. This way a buyer can ensure that the offered inventory is valid and adfraud can be reduced. Read more
What's app-ads.txt?
App-ads.txt is the ads.txt standard for mobile apps. It allows buyers to verify that a seller is really allowed to sell inventory for this certain app. It combines the logic from ads.txt with meta information from App stores.