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Automattic CEO Matt Mullenweg calls Tumblr acquisition his 'biggest failure' but remains committed

By

Sarah Perez

1d ago· 4 min readenNews

Summary

At WordCamp Canada 2025, Automattic CEO Matt Mullenweg publicly called the company's acquisition of Tumblr his "biggest failure" so far. He noted that Tumblr remains on a different technical stack than WordPress, and plans to migrate its half-billion blogs to WordPress infrastructure were put on hold earlier this year due to high costs. Despite the platform remaining unprofitable, Mullenweg stated he hasn't given up on turning it around.

Key quotes

· 3 pulled
Automattic CEO Matt Mullenweg called the company's Tumblr acquisition his biggest failure
Tumblr was still on a different technical stack than WordPress — something he had intended to correct by migrating the back end to WordPress infrastructure
Mullenweg said he hasn't given up
Snippet from the RSS feed
At WordCamp Canada 2025, Automattic CEO Matt Mullenweg called Tumblr his “biggest failure,” noting the challenge of maintaining the platform’s half-billion blogs while it remains unprofitable. Though plans to migrate Tumblr to WordPress infrastructure are

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