Case study

Maximizing Revenue: Success with In-App Header Bidder


Soundhound came to Adapex looking to modernize their header bidding set-up for their music app.  Though they had a solid demand stack of bidders, Soundhound felt they could be driving more revenue. The Soundhound music app allows users to find and play music with lyrics.  Their advanced tech identifies music that is playing and offers 300M+ downloads and billions of songs discovered.  




App Category: Music

Monthly Visits: 451.30K

Category Rank: 65


Soundhound’s demand stack of bidders was organized in a traditional format with all bidders employed by independent SDKs and waterfalls.  After an audit of the current setup, Adapex implemented Merlin™, our in-app header bidding solution which enabled us to consolidate most of Soundhound’s previous partners in GAM SDK with Open Bidding and increase demand sources.  Moving Soundhound to an updated header bidding solution built specifically for in-app monetization not only led to immediate revenue uplifts but also decreased troubleshooting issues and improved efficiencies. 

The Adapex team performed ongoing optimizations, adding 4 bidders in GAM.  We then set up a Prebid SDK so we could add even more partners, bringing in an additional 12 partners. Soundhound is currently using 16 demand sources through two easy-to-implement, and easy-to-maintain SDKs.  We continue to optimize with the Soundhound team as more SSPs move to the header bidding side.  Additionally, as Prebid continues to upgrade the open-source offer, features continue to be added and optimized.


Soundhound has two apps, one on iOS and one on Android.  Performance varied by platform, as iOS traffic has significantly more personalization restrictions.  Soundhound’s Android app saw uplifts in CPM which led to increased revenue overall.  And while Soundhound’s iOS app didn’t see the same uplift, they did find that their revenue was protected by the implementation of header bidding which commands higher CPMs.  

  • Overall RPM was up +40% 
  • eCPM +36%
  • Impressions +194%
  • Revenue +303%


Our collaboration with the Adapex team has led to performance uplifts, and we are extremely grateful for their help. We get useful insights, tips, and actionable ways to improve our overall performance. There have been so many changes in our app and having a team to advise us on improving our revenue performance is tremendously helpful. Now we can focus on what matters most to our users, so the time we spend has the greatest impact.

Lauren Nicolas
Senior Manager, Monetization Marketing, Soundhound

Satisfied Clients

For years, Adapex has been our trusted partner — their experts are always there for us and feel like a part of our team. I have confidence that their techniques and products will keep our revenues growing strong. Highly recommend!

Dominick Miserandino Former CEO,
Working with Debra and her team has helped our monetization strategy tremendously.  We have a great relationship with Adapex, working together to maximize monetization, identify new incremental revenue opportunities and improve overall ad performance.  Adapex is very easy to work with, responsive and proactive…their technical team is always ready to work with our development team to ensure seamless integration.

We couldn’t find a better partner to work with.

Oren Vardy Co-Founder & Portfolio Manager, Landoc Holdings LTD

We’ve been working with Adapex for a while and they consistently offer great support and present new opportunities to generate more revenue every month.

Sebastien Rozen Co-Founder and CEO, Viewdeos

The entire Adapex team has quickly become key players in our overall revenue optimization strategy. They’re fast, responsive, proactive, and most importantly good at what they do. I am beyond happy I made the decision to make the change to Adapex.

Asad Meah CEO & Founder, Awaken the Greatness Within

“Adapex more than doubled our programmatic revenue year-over-year. This fact speaks for itself; what I would like to call out is the exceptional level of attention and support that they provide to their clients. It would be a true challenge to find a more responsive or knowledgeable team anywhere in the industry.”

Allen Weiss Senior Developer, Sweety High