Some disappointing high-profile initial public offerings haven't dampened investors' enthusiasm for startup tech firms.

More than two-thirds of investors think the valuations of private tech companies are only going to grow in coming months, according to a survey by SharesPost that was charted for us here by Statista. And investors are more enthusiastic about startups' prospects now than they were at the end of last year.

The uptick in optimism is surprising as some of the most anticipated IPOs of the year have failed to live up to expectations. Blue Apron saw its stock dip 14% amid worries Amazon's new meal service would eat it up. Shares of the equally highly anticipated Snap have fallen dramatically since its IPO in March and fell further on Thursday after its second quarter report missed Wall Street's expectations.

(Mike Nudelman/Business Insider)

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