Prebid.js

Prebid.js is the leading open-source header bidding wrapper used by thousands of publishers. It supports hundreds of demand sources and allows full code-level control over auctions. Unlike Mth Sense’s managed ML optimization and automated tag service, Prebid requires ongoing developer resources to maintain adapters, set floors and analyze results. It is free but offers no revenue guarantees or unified discrepancy dashboard, making it attractive for technically strong teams versus Mth Sense’s turnkey approach for lean ad-ops groups.