Topsy, an Apple-owned service that searched and analysed data from Twitter, is no more. As noted by 9to5Mac, the company's website now redirects to an Apple support page about how to use the new proactive Search functionality (above) in iOS 9. Topsy posted a message to Twitter saying "We've searched our last tweet," and its profile bio now states "Every tweet ever published. Previously at your fingertips."
Apple bought Topsy a little over two years ago for a reported figure of over $225 million, making it one of Cupertino's pricier acquisitions. It's not clear what Apple has done with Topsy's software or staff, but the URL redirect suggests its analytical technology may have been folded into iOS 9's Search feature, which indexes devices and presents information alongside suggested data from the internet.
We've searched our last tweet.— Topsy (@Topsy) December 16, 2015