SAN FRANCISCO--(BUSINESS WIRE)-- #CommunicationsAPIs--Nylas, a leading provider of communications APIs for developers, today announces $25 million in Series B funding. This round was led by 8VC and Round13 Capital, with participation from existing investors Spark Capital, ScaleUP, and Slack Fund. Additionally, new investors Citi Ventures joined the round. Nylas provides an API platform that enables developers to quickly and securely access and process user data from any email, calendar, and contacts provider in the.