No on Twitter because you’re one Jack Dorsey interview/comment away from a stock crash.
No on Dropbox because a majority of their revenue still come from consumer and SMB subscriptions — they don’t know WTF they’re doing in enterprise.
Box and Okta have very similar cultures (I work at Okta). Both are “enterprisy” and have mature enterprise sales and product teams. Okta has an extreme hustle culture so be careful — if you’re not into working 70+ hours a week and a dealing with a sales bro culture it may not be the fit for you. Be especially careful what team at Okta you join, as you could end up working for some real assholes.
If I’m enterprise solution selling and/or building products to support them, I’d roll with Okta. Of course this is without looking at culture or comp. if I wanted to be a part of a platform for consumers, I’d go with Twitter.