The notification software startup received backing from strategic investors Twilio, Slack and SendGrid in a $10.1m round that will fund hiring and product development.

Enterprise software providers Twilio, SendGrid and Slack participated in a $10.1m series A round for US-based marketing software developer Courier on Monday. Venture capital firm Bessemer Venture Partners led the round, which included Matrix Partners, Acceleprise, Y Combinator, SaaS Ventures and angel investors including Allen Gannett, Andrew Miklas, Edith Harbaugh, Eric Koslow, Jack Altman, Joe…

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