Wikipedia
CARTO (former CartoDB) is a Software as a Service (SaaS) cloud computing platform that provides GIS and web mapping tools for display in a web browser. CartoDB has been rebranded to CARTO on 7-7-2016.
CARTO users can use the company's free platform or deploy their own instance of the open source software. CARTO is offered as freemium service, where accounts are free up to a certain size. For larger accounts, a fee is applied. It was first released in Beta at FOSS4G in Denver in September 2011, and officially debuted as a final release at Where2.0 in April 2012.
Since 2014 CARTO is an independent company therefore Vizzuality is part of the past. The Spanish start-up raised $7 million from a consortium of investors in September 2014. In September 2015, CARTO received a $23 million in Series B financing.