The most popular alternative is nextbigsound, which is free. Unfortunately we only know of 1 alternatives to Chartmetric. If you can't find an alternative you can try to filter for web or SaaS options.
The list of alternatives was last updated Mar 29, 2020
Next Big Sound (NBS) is a New York-based company which provides analytics for online music. The company analyses the popularity of musicians in social networks, streaming services, and radio. The company was acquired by Pandora Radio in May 2015.