Klaviyo

Klaviyo has raised $778 million across major rounds, including $320M Series D (2021), $200M Series C (2020), and $100M Series D (2022), before going public. The company reached a $4.15B valuation during its 2020 Series C. Key investors include Accel, Shopify, Summit Partners, ClearBridge, and Sands Capital. Founded in 2012, Klaviyo specializes in AI-powered e-commerce marketing automation, helping brands personalize email, SMS, and in-app messaging. With nearly 1,500 employees and rapidly scaling annual revenue of $698M (2023), Klaviyo remains one of the most well-funded companies in marketing automation.