Optimizely has raised $200 million across eight funding rounds, including Seed, Early-Stage, Late-Stage, and Debt financing. Its largest round was the $58.5 million Series C led by Index Ventures in September 2015. Other major rounds include $57 million Series B, $33.7 million Series A, $50 million Series D, and a $55 million debt round from Bridge Bank in 2019. With support from top investors such as Andreessen Horowitz, Benchmark, Bain Capital Ventures, Accenture, and Goldman Sachs, Optimizely strengthened its position as a leader in digital experience optimization.