BuzzSumo

James Blackwell and Henley Wing launched BuzzSumo in the UK in 2013 to help content marketers answer one question: what content performs best on social media for any topic? BuzzSumo indexed billions of articles and showed their social share counts across Facebook, Twitter, LinkedIn, and Pinterest — instantly revealing what was resonating with audiences. Content marketers used it to benchmark competitor performance, find backlink opportunities, and identify influencers who shared content in their niche. The product launched as a simple search box and went viral in the content marketing community immediately, generating hundreds of thousands of searches in the first weeks. The team bootstrapped to $2.5M ARR in their first 18 months without taking outside capital. Moz's founder Rand Fishkin called it one of the best content marketing tools ever built. In 2017 BuzzSumo was acquired by Brandwatch for $14M — a landmark bootstrapped exit in the UK tech scene that proved content marketing tools could build to significant exits without VC.