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The battle of the digital assistants: Windows Phone Cortana vs Google Now vs Siri

Mark Hachman | April 15, 2014
Even in beta, Microsoft's Cortana digital assistant has an impressive amount to say for itself.

digital assistants primary

The personal computer has endured for more than 30 years. We understand it. It's familiar. But digital assistants--the new breed of smartphone data butlers designed to make our lives simpler--have yet to climb out of their cribs.

This holds true for Cortana, the digital assistant built into Windows Phone 8.1, which Microsoft released as a developer preview on Monday. It's packed with intuition, but it's still a beta product, and it isn't a miracle worker by any means. 

The perfect digital assistant would anticpate our every need, retrieving answers from search engines, connecting us with our social networks, and tapping into maps and calendars to guide our travel and appointments. But no single digital assistant has yet figured out how to connect all these dots in an effective, intuitive way.

As we compare the three big names in digital assistants--Cortana, Apple's Siri and Google Now--we expect these services to evolve gradually from helpful librarians into full-fledged concierges. But we're not there yet. The assistants do an admirable job in responding to queries, but they haven't yet mastered the ability to tell us what we need even before we ask.

Just the facts, ma'am

To test the three services, we quizzed each assistant on a variety of general facts and calculations. Then we asked them to perform a number of common smartphone operations--nearly 40 in all. We scored each assistant on the accuracy of its results and the elegance of its operation. 

We awarded two points if an assistant completed a task by providing simple search results, and three points if it responded orally or displayed a "card," which would add an image and further information to the oral response. We also awarded a bonus half-point if an assistant completed a task especially well.

We wanted to penalize outright failure heavily, which is why our scale starts at two points. If one of the assistants couldn't provide any helpful response, it received a zero.

So how did our three contenders perform? Check out our list of questions and tasks for the full rundown (clicking the following link will download a read-only spreadsheet file):

Here's the short story: Google Now scored 101 points, Siri scored 97 points, and Cortana came in last with a score of 87. We really couldn't factor in the proactive powers of each assistant--and this is exactly why our numerical scores are only part of the story.

A key value of a digital assistant is how well it anticipates what you want before you want it. When it works, it's magic. The first time Google Now pinged me with an unprompted message telling me my flight was delayed, it blew my mind.


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