Similar Tech - SimilarTech offers a Sales Insights platform which helps companies uncover their ideal market by crawling the sourcecode of over 300M sites.
ZoomInfo - ZoomInfo is a B2B database providing detailed business information on people and companies.
Popcornmetrics - Track user behavior without coding
Clearbit - Clearbit provides Business Intelligence APIs
Software Development Trends 2018 - Trends and data from 9 tech firms
InsideView - InsideView aggregates and curates all the company and contact data, news and social insights, and professional connections you need to do business better.