--- title: Pixalate Releases Q1 2018 Programmatic Seller Trust Indexes description: Pixalate’s Seller Trust Indexes evaluate and rank the quality and integrity of programmatic advertising sellers. Learn more about the Q1 2018 ranking here. image: https://www.pixalate.com/hubfs/Blog_Media/Blog%20photos/march-2018-pixalate-gsti-top-five-programmatic-seller-rankings-(1).png --- [![pixalate-full-logo](https://www.pixalate.com/hs-fs/hubfs/Pixalate_Logos/pixalate-full-logo.jpg?width=150&height=60&name=pixalate-full-logo.jpg "pixalate-full-logo")](https://www.pixalate.com) Search **Menu** ** ** ![](https://www.pixalate.com/hubfs/Blog_Media/Blog%20photos/march-2018-pixalate-gsti-top-five-programmatic-seller-rankings-(1).png) [Rankings](https://www.pixalate.com/blog/topic/rankings) | 2 min read # Pixalate Releases Q1 2018 Programmatic Seller Trust Indexes Written by [Pixalate](https://www.pixalate.com/blog/author/pixalate) Jun 27, 2018 9:06:18 AM Pixalate has released the Q1 2018 rankings for the Global Seller Trust ([GSTI](https://www.pixalate.com/sellertrustindex/global/#!global)), Mobile Seller Trust ([MSTI](https://www.pixalate.com/sellertrustindex/mobile/#!global)), and Video Seller Trust ([VSTI](https://www.pixalate.com/sellertrustindex/video/#!global)) programmatic Seller Trust Indexes. Below are some of the key takeaways from each index. [![pixalate-seller-trust-indexes-cta](https://no-cache.hubspot.com/cta/default/2364596/fba0942f-35ec-49ac-a89d-73cfa993b4c0.png)](https://cta-redirect.hubspot.com/cta/redirect/2364596/fba0942f-35ec-49ac-a89d-73cfa993b4c0) ### **GSTI: US has greater variance in programmatic seller quality** Our data reveals that there is far greater variance between high- and low-ranking sellers in the U.S., compared to the rest of the world. This means platform selection is critical in the U.S., as working with the wrong partner can put you at a great disadvantage from an inventory quality perspective. Here are the top five companies from the U.S. and International GSTI in March 2018: [![march-2018-pixalate-gsti-top-five-programmatic-seller-rankings-(1)](https://www.pixalate.com/hs-fs/hubfs/Blog_Media/Blog%20photos/march-2018-pixalate-gsti-top-five-programmatic-seller-rankings-(1).png?width=800&name=march-2018-pixalate-gsti-top-five-programmatic-seller-rankings-(1).png)](https://www.pixalate.com/sellertrustindex/global/#!global) ### **MSTI: Mobile app platforms rise to the top** In our most recent MSTI, which ranks the overall quality of mobile app sellers, three of the top five companies and six of the top 12 companies base their business on exclusively in-app inventory. In Q1 2018, the total number of platforms included on the MSTI increased by 26%, compared to 2017 averages. This suggests that the mobile app advertising ecosystem is still going through a phase of rapid growth. Here are the top 10 companies from the MSTI in March 2018: [![march-2018-pixalate-msti-top-five-programmatic-seller-rankings-(1)](https://www.pixalate.com/hs-fs/hubfs/Blog_Media/Blog%20photos/march-2018-pixalate-msti-top-five-programmatic-seller-rankings-(1).png?width=800&name=march-2018-pixalate-msti-top-five-programmatic-seller-rankings-(1).png)](https://www.pixalate.com/sellertrustindex/mobile/#!global) ### **VSTI: Gap between higher- and lower-ranked sellers is decreasing** According to our data, the gap between higher- and lower-ranking programmatic video ad sellers has narrowed, which means video platforms are more competitive with one another in terms of quality compared to a year ago. Here are the top five companies from the U.S. and International VSTI in March 2018: [![march-2018-pixalate-vsti-top-five-programmatic-seller-rankings-(1)](https://www.pixalate.com/hs-fs/hubfs/Blog_Media/Blog%20photos/march-2018-pixalate-vsti-top-five-programmatic-seller-rankings-(1).png?width=800&name=march-2018-pixalate-vsti-top-five-programmatic-seller-rankings-(1).png)](https://www.pixalate.com/sellertrustindex/video/#!global) ### **[![pixalate-seller-trust-indexes-cta](https://no-cache.hubspot.com/cta/default/2364596/fba0942f-35ec-49ac-a89d-73cfa993b4c0.png)](https://cta-redirect.hubspot.com/cta/redirect/2364596/fba0942f-35ec-49ac-a89d-73cfa993b4c0)** ### **About Pixalate’s Seller Trust Indexes** Pixalate’s monthly Global Seller Trust Index (GSTI), Mobile Seller Trust Index (MSTI), and Video Seller Trust Index (VSTI) are the worldwide standards in programmatic advertising quality ratings. Released monthly, the indexes evaluate and rank the quality and integrity of advertising networks and sellers across channels, platforms, and devices. Global quality ratings are based on an analysis of overall effectiveness assessing multiple factors, such as viewability, fraud, engagement, domain masking, network quality and more, in compliance with recognized industry standards.  To learn more about the methodology and to download the expanded list of top sellers, visit [http://www.pixalate.com/sellertrustindex.](https://www.pixalate.com/sellertrustindex) ### **About Pixalate** Pixalate is a cross-channel fraud intelligence company that works with brands and platforms to prevent invalid traffic and improve ad inventory quality. ### Search Blog Search ### Follow Pixalate ### Subscribe to our blog *By entering your email address and clicking Subscribe, you are agreeing to our [Terms of Use ](https://www.pixalate.com/terms)and [Privacy Policy.](https://www.pixalate.com/privacypolicy) Previous Story [← Pixalate Week in Review: June 18 - 22, 2018](https://www.pixalate.com/blog/programmatic-ad-fraud-news-week-in-review-june-22-2018) [** ](https://www.pixalate.com/blog) Next Story [Q1 2018 GSTI: US has greater variance in programmatic seller quality →](https://www.pixalate.com/blog/global-seller-trust-index-march-2018-programmatic-quality) ## You May Also Like These Stories on Rankings [![](https://www.pixalate.com/hubfs/Blog%20Media/2026%20Covers%20and%20Images/OpenEPG%20index%20image.png) ](https://www.pixalate.com/blog/pixalate-unveils-openepg-index-monthly-rankings-of-top-100-streaming-tv-shows-based-on-open-programmatic-ctv-ad-spend-consumer-reach-across-small-large-screens) [Seller Trust Index](https://www.pixalate.com/blog/topic/seller-trust-index) ### [Pixalate Unveils OpenEPG™ Index: Monthly Rankings of Top 100 Streaming TV Shows Based on Open Programmatic CTV Ad Spend & Consumer Reach Across Small & Large Screens; 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Google AdExchange Top-Ranked 'Direct' Seller in the US](https://www.pixalate.com/blog/pixalate-releases-q1-2026-mobile-seller-trust-index-2.0) Jun 12, 2026 9:00:00 AM | 5 min read ** ### Subscribe to our blog *By entering your email address and clicking Subscribe, you are agreeing to our [Terms of Use ](https://www.pixalate.com/terms)and [Privacy Policy.](https://www.pixalate.com/privacypolicy) ![pixalate-logo-red-small](https://www.pixalate.com/hs-fs/hubfs/2018NewTemplate/pixalate-logo-red-small.png?width=208&name=pixalate-logo-red-small.png "pixalate-logo-red-small") ** By entering your email address and clicking Subscribe, you are agreeing to our [Terms of Use](https://www.pixalate.com/terms) and [Privacy Policy](https://www.pixalate.com/privacypolicy) Products [Analytics](https://www.pixalate.com/products/analytics) [Blocking](https://www.pixalate.com/products/blocking) [Media Rating Terminal](https://www.pixalate.com/products/mrt) [Publisher Trust Indexes](https://www.pixalate.com/rankings/?group=app&reportId=publisherTrustIndex) [Seller Trust Indexes](https://www.pixalate.com/rankings/?group=app&reportId=publisherTrustIndex) [IoT Device Rankings](https://www.pixalate.com/rankings/?group=app&reportId=iotDeviceReach) Resources [Blog](https://blog.pixalate.com/) [Press](https://www.pixalate.com/press) [Careers](https://www.pixalate.com/jobs) [Team](https://info.pixalate.com/pixalate-leadership-team) Contact Email [** sales@pixalate.com ](mailto:sales@pixalate.com) [** privacy@pixalate.com ](mailto:privacy@pixalate.com) US: [** +1 888 749 2528 ](tel:+1%20888%20749%202528) EU: [** +44 (0)800 011 2050 ](tel:+44%20(0)800%20011%202050) Slack: [Join ATSAPI Slack Channel ](https://atsapi-pixalate.slack.com/join/shared_invite/zt-10dtow5cj-OEtlNr5yzJkrZMQUqcEEow#/shared-invite/email) Offices Global Offices US 1775 Greensboro Station Place, Suite 425, McLean, VA 22102 UK 20 North Audley Street London, W1K 6WE, United Kingdom EU 10 Earlsfort Terrace Dublin 2, D02 T380, Ireland Singapore 10 Anson Road, #22-02 International Plaza, Singapore 079903 [![facebook](https://www.pixalate.com/hubfs/footer/icons/facebook.png) ](https://www.facebook.com/pixalate) [![x](https://www.pixalate.com/hubfs/footer/icons/twitter-x.png) ](https://twitter.com/pixalateinc) [![linkedin](https://www.pixalate.com/hubfs/footer/icons/linkedin.png) ](https://www.linkedin.com/company/pixalate) ![wechat](https://www.pixalate.com/hubfs/footer/icons/wechat.png) [![slack](https://www.pixalate.com/hubfs/footer/icons/slack.png) ](https://atsapi-pixalate.slack.com/join/shared_invite/zt-10dtow5cj-OEtlNr5yzJkrZMQUqcEEow#/shared-invite/email) [Terms of Use](https://www.pixalate.com/terms) [Privacy Policy](https://www.pixalate.com/privacypolicy) [GDPR Compliance](https://www.pixalate.com/gdpr) Disclaimer Copyright © 2025 Pixalate [Back to top **](https://www.pixalate.com/blog/global-mobile-video-seller-trust-index-march-2018#) # Disclaimer Disclaimer: The content of this page reflects Pixalate’s opinions with respect to the factors that Pixalate believes can be useful to the digital media industry. 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