Patient communications software provider, Weave, collects $70M at a $970M valuation. : Weave, a developer of patient communications software focused on the dental and optometry market, was the first Utah-headquartered company to graduate from Y Combinator in 2014. Now, it’s poised to enter a small but growing class startups in the ‘Silicon Slopes’ to garner ‘unicorn’ status. The business announced a $70 million Series D last week at a valuation of $970 million. Tiger Global Management led the round, with participation from existing backers Catalyst Investors, Bessemer Venture Partners, Crosslink Capital, Pelion Venture Partners and LeadEdge Capital.