What are some alternatives?
When comparing ObservePoint and Blue Triangle, 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.
Ensighten Manage - Tag Management
TagCommander - TagCommander is a tag management system.
SerpBook - SerpBook provides whitelabel SEO rank tracking services.
OpenX - Ad technology platform available as a hosted service or as an open source download.
Tag Inspector - Tag Inspector is a marketing tag auditing and alerting tool that empowers its clients to report on web analytics tags.