What are some alternatives?
When comparing SerpBook and Qubit Opentag, you can also consider the following products
Google Tag Manager - Google Tag Manager helps make tag management simple, easy and reliable by allowing marketers and webmasters to deploy website tags all in one place.
ObservePoint - Monitor, test and validate the accuracy of your web tags, critical user paths and more with ObservePoint's automated Data Quality Assurance solution.
Ensighten Manage - Tag Management
OpenX - Ad technology platform available as a hosted service or as an open source download.
Tealium - Enterprise tag management and digital data distribution (D3P).
Blue Triangle - Blue Triangle's analytics platform uncovers issues on your website measurably impacting your revenue and helps you fix them.