Lunchclub - Curated 1:1 professional connections
Clearbit - Clearbit provides Business Intelligence APIs
Virus Cafe - Make a friend in 2 minutes
ZoomInfo - ZoomInfo is a B2B database providing detailed business information on people and companies.
Donut Slack Bot - Get matched with a new coffee buddy each week in Slack
InsideView - InsideView aggregates and curates all the company and contact data, news and social insights, and professional connections you need to do business better.