The number of Twitter followers of a given user tracked over time can be used as a proxy for growth. Use this integration to keep tabs on key accounts automatically. After you set it up, Nekton will search for a Twitter user's followers via a webhook and post the count to a PostgreSQL table. That way, you'll have the info you need for any further analysis.
PostgreSQL is a powerful, open-source database engine with a uniquely advanced query optimizer and dozens of built in features, making it an easy choice for production databases.