No.  
There are a growing number of competitive SaaS products available that may assist you with tagging pages on your website (including "Universal Tagging" products).  Please note that none of these are passive -- they all require your website traffic to pass through their servers and in doing so slow down your pages and introduce another potential point of failure into your IT infrastructure.  In addition, they are still subject to many of the worst drawbacks of page tagging.
Pion on the other hand is an enterprise software application that passively captures website activity by listening into the raw network traffic between your web servers and visitors.  It is physically incapable of slowing down your pages, or impacting your traffic in any way.  It is technically impossible to accomplish this using a "SaaS" model, and therefore Pion requires that you:

• Install Pion on your web server(s), or:
• Install Pion on a separate server that resides in your websites' data center

For more information, please see the article "How do I install Pion on my website?" or the Pion Installation Guide.