teqqr

Migration / Pantheon → Upsun

Pantheon to Upsun, rehearsed until it's second nature.

I've moved Drupal and WordPress estates off Pantheon more times than I can count, so I built tooling that does the risky, repetitive parts automatically and proves the new site matches the old one before anyone touches DNS.

Plan my migration

30 min · bring your repo URL

From Pantheon

To Upsun

  • config pantheon.yml .upsun/config.yaml
  • cli terminus upsun
  • cdn Global CDN Fastly
  • deploy Quicksilver git push hooks
✓ parity 2,418 / 2,418visual diff 0.0%rollback armed
Illustration of a migration parity report: 2,418 URLs checked on the old and new platform, every status code and redirect matching, and 0.0% visual difference.

§ Why it goes smoothly

I automated the parts that usually go wrong

Most migrations fail on details: a hard-coded Pantheon path, a cron job nobody documented, one page template that renders differently. My tooling finds those before launch day, not after.

  • Config translation: pantheon.yml rewritten to .upsun/config.yaml, with every change listed for review
  • Content parity checks: every URL crawled on both platforms, compared for status, redirects, and markup
  • Visual regression: screenshots of key pages diffed side-by-side, down to the pixel
  • Rehearsed cutovers: database and files synced and launched on Upsun repeatedly until the run is predictable

What I untangle from Pantheon

  • Upstream-managed core and the Pantheon settings include
  • Quicksilver hooks and Redis / Solr add-ons
  • Multidev workflows other tooling depends on

What you get on Upsun

  • Services, routes and workers as config-as-code
  • Preview environments cloned from production data
  • Resources sized per environment, billed on usage

§ From the people who signed off

Quiet launches, in their words

“The parity report was the first time I've seen a vendor prove a migration worked instead of just saying it did. Our editors didn't notice we'd moved.”

Dana WhitfieldDirector of Web, regional university

“We'd been quoted six months by an agency. It took ten weeks, and my team came out of it actually understanding Upsun.”

Marco RuizEngineering Lead, healthcare nonprofit

“Every question got answered by the person doing the work. Cutover night was the calmest deploy we've ever had, which is exactly what I wanted.”

Priya NatarajanCTO, B2B publishing group

Ready to leave Pantheon?

Send the repo, or just a site count. On a 30-minute call I'll tell you what moves cleanly to Upsun, what needs work, and roughly how long it takes.

Book a call
  • Taking work for this quarter
  • NDA on request
  • EN / ES