For the last four years, many startups have been chasing after a billion-dollar "unicorn" valuation.
Now that the steroid era of startup funding is coming to an end, these richly valued companies are in the spotlight. Many will end up being worth a lot less than their last valuation. A few will surpass it.
Business Insider worked with PitchBook to rank the companies that juiced up their valuations the most since 2012.
Here are the top 30 companies who saw their valuations rise by at least $1 billion during the past 4 years, ranked by how those valuations have grown:
SEE ALSO: The steroid era of startups is over — here's what 8 top VCs think will happen next
30. InsideSales.com increased its valuation by $1.31 billion between 2012 and 2016.
InsideSales.com provides a cloud-based platform for sales reps to predict and accelerate a company's revenue growth.
Post-money valuation pre-2012: $32 million
Pre-money valuation in 2016: $1.342 billion
Valuation increase: 3,941%
Total raised: $200 million from Salesforce Ventures, Microsoft, and Kleiner Perkins Caufield & Byers
29. AppNexus: $1.31 billion
AppNexus powers and optimizes online advertising spending.
Post-money valuation pre-2012: $191 million
Pre-money valuation in 2016: $1.501 billion
Valuation increase: 584%
Total raised: $313.17 million from Silicon Valley Bank, Venrock Associates, and First Round Capital, among other investors
28. Box: $1.49 billion (before it went public in 2015).
Box stores files online for personal and business accounts.
Post-money valuation pre-2012: $757 million
Last private valuation: $2.25 billion
Valuation increase: 97%
Total raised: $583.93 million from Draper Fisher Jurvetson, New Enterprise Associates, Andreessen Horowitz
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