A startup that’s competing with Airbnb to be your city tour guide, why a Twitter anti-spam acquisition drew some abuse, and why the new attention on Khan Academy is totally legal. Theme music is "Bot Fest" by Alex Vaan. Learn more about your ad choices. Visit <a href="https://megaphone.fm/adchoices">megaphone.fm/adchoices</a>

A startup that’s competing with Airbnb to be your city tour guide, why a Twitter anti-spam acquisition drew some abuse, and why the new attention on Khan Academy is totally legal. Theme music is "Bot Fest" by Alex Vaan. Learn more about your ad choices. Visit megaphone.fm/adchoices

A startup that’s competing with Airbnb to be your city tour guide, why a Twitter anti-spam acquisition drew some abuse, and why the new attention on Khan Academy is totally legal.&nbsp;Theme music is "Bot Fest" by Alex Vaan. Learn more about your ad choices. Visit <a href="https://megaphone.fm/adchoices" rel="noopener noreferrer">megaphone.fm/adchoices</a>

Peek, Smyte and Khan Academy

Learn about new Bay Area companies you likely haven’t heard of yet. They could become the next Airbnb or Uber — or they could die before they hit the mainstream. We'll tell you why they matter either way. Hosted by San Francisco Chronicle business editor Owen Thomas and reporter Sophia Kunthara, and Crunchbase News editor-in-chief Alex Wilhelm.

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Peek, Smyte and Khan Academy

Peek, Smyte and Khan Academy

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