Slack, which makes software to help improve team communication Slack, which makes software to help improve team communication, said it raised $160 million (roughly Rs. 997 crores) in a round of funding, valuing it at $2.8 billion (roughly Rs. 17,463 crores). April 17, 2015 Business/IT Magazine/Magazine Advertisement india/Networking/New Feature/News/Product Launch/Tech Hardware/Technology News