That's a pretty big jump. In fairness I will say the salary was competitive to the company I left for the startup. That being said I had more RSUs that were already in flight to vest at the company I had left. This is how I negotiated higher options at the startup. The cash payout I was given didn't make up for what was lost moving to the startup and taking a pay cut.
That being said the culture at that startup was the best I've experienced. The people and the product were fantastic. So if I were to do it over again would I have made the same choice? I'm not sure and that caution purely comes from the culture and management of Splunk.