---
title: "Pantheon: automated website migration at scale"
description: "Tarmac built an automated tool that let Pantheon move thousands of customer websites onto its platform 80% faster."
canonical_url: "https://www.tarmac.io/work/pantheon-migration/"
last_updated: "2026-09-21"
---

[Work](https://www.tarmac.io/work/) / Pantheon

Pantheon SaaS

# Pantheon: automated website migration at scale

80% faster website migrations, at thousands-of-sites scale

## The challenge

Pantheon needed to migrate thousands of Drupal and WordPress sites onto its platform from a long tail of different hosting environments, without losing transparency, security, or automation along the way.

## What we did

Tarmac built an automated migration tool in Go running on Google Cloud Platform, backed by engineers who handled the non-standard sites by hand and checked quality on every migration.

## The results

Pantheon migrated thousands of websites onto its platform and cut migration time by 80%, with Tarmac continuing to support its scaling operations today.

Tech stack

-   Go
-   Google Cloud Platform
-   Drupal
-   WordPress

More in SaaS

## Related case studies

[20 min

### INaudio

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### INaudio

Tarmac moved INaudio off Spotify infrastructure, 120+ microservices and two petabytes, without ever touching the source environment. One hour of downtime.

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### INaudio

After taking ownership of INaudio, Tarmac rewrote the infrastructure in Terraform and cut more than $500,000 a year from a two petabyte cloud estate.

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## Let’s build something worth taking off.

Tell us what you’re building. We’ll assemble the senior team to ship it.

[Let’s team up→](https://www.tarmac.io/contact/?source=work-pantheon-migration) [info@tarmac.io](mailto:info@tarmac.io)

## Sitemap

See the full [sitemap](https://www.tarmac.io/sitemap.md) for all pages on tarmac.io.