Similar Tech - SimilarTech offers a Sales Insights platform which helps companies uncover their ideal market by crawling the sourcecode of over 300M sites.
Crunchbase - Crunchbase is a platform for discovering industry trends, investments, and news about companies around the world.
Popcornmetrics - Track user behavior without coding
CB Insights - CB Insights is a company database for the venture capital and corporate development community.
Software Development Trends 2018 - Trends and data from 9 tech firms
Tracxn - data on companies