Case Study: Pantheon achieves a zero-failure migration of 200,000+ websites to Google Cloud with New Relic

Pantheon Confidently Accelerates Migration to Google Cloud Platform Using New Relic

Pantheon is a website operations and hosting platform for Drupal and WordPress that powers more than 200,000 sites and billions of monthly pageviews. As its pace of innovation outgrew a first‑generation cloud provider, Pantheon faced the complex challenge of migrating thousands of highly customized sites and multiple development environments to a more capable cloud platform without disrupting customers.

Pantheon executed a three‑month migration plan and used New Relic APM to establish baselines, monitor legacy and GCP environments, and troubleshoot issues down to the line of code. The team migrated 50,000 customers (over 200,000 sites) in two weeks with no major incidents or support calls, delivered a 5% average site performance improvement, prevented major outages, and reduced cloud spend by roughly 40%, while embedding New Relic across all sites to support future Kubernetes-driven innovation.

Pantheon

Josh Koenig

Pantheon