Collaboration software maker Smartsheet announced Tuesday Blackstone and Vista Equity Partners will acquire it in an all-cash deal valuing the company at about $8.4 billion.Stockholders will receive $56.50 per share, a 41% premium to Smartsheet's average closing price over the last three months.The company had been gauging interest from potential acquirers for several months. The company went public in 2018 and sought to go head-to-head with other software companies like Atlassian."As we look to the future, ...