Microsoft Announces Siri Competitor Cortana, Coming With Windows Phone 8.1

Microsoft today announced Windows Phone 8.1, which comes equipped with the company's digital assistant, Cortana. In development for several years, Cortana is Microsoft's answer to Siri and Google Now, the digital assistants from Apple and Google.

Cortana is named for an AI character in the popular Halo video game series and as in the game, the assistant is voiced by actress Jen Taylor. Given a distinctly female personality, she is powered by Microsoft's search engine, Bing, and is designed to learn about users by asking questions and monitoring user activity, interacting through both text and speech.

cortana
According to an extensive piece on Cortana from The Verge, Microsoft designed the feature based on real personal assistants, giving Cortana a "Notebook" to work from. The Notebook can be described as a settings page, allowing users to designate what Cortana can track. In her Notebook, Cortana stores information like personal interests, relationships with people, frequently visited places, appointment dates, quiet hours, and more.

"It's her view of you, but clearly you can just snatch it from her at any time and say 'That’s not right, I don't want you to know this' or 'I'm not comfortable with you reading my email,'" explains Ash. "So you have complete control over what she knows and she’s transparent about it."

Entries in the Notebook are stored in the cloud, and you can share contact information with it, as well as your interests, home and work locations, and more. The notion of Cortana acting as a personal assistant with a notebook— as opposed to a creepy stalker — has been drilled into the team from the beginning, they say.

Cortana is a core function of Windows Phone 8.1, replacing the existing search function. Like Siri she can schedule reminders, but Cortana's functionality is somewhat more powerful, allowing reminders to be tied to people and locations. For example, Cortana can be asked to give a reminder to discuss a certain topic when calling a contact, with that reminder popping up when a call is placed.

The digital assistant also offers a daily summary of information, similar to what can be found in Apple's own Notification Center. Cortana lists upcoming appointments, reminders, weather information, and more. She can, with permission, track user email to pull out information like airline reservations.

Like Siri, Cortana has a personality. She has witty responses for certain questions, such as "Who is your father?" to which she replies, "Technically speaking, that'd be Bill Gates. No big deal." Displayed as a circle on a phone screen, she's also able to express 16 different emotions.

While Siri has not been opened up to developers, Microsoft is releasing a third-party SDK. Cortana will integrate with services like Hulu, Twitter, Facebook, allowing people to use voice commands to launch television shows or send a tweet.

Cortana remains in the beta stages, as there are bugs with the software that still need to be worked out. Windows Phone 8.1 will launch in late April or early May, but Cortana will only be available in the United States for the time being.

Microsoft also announced that it is making Windows licenses free for mobile phones and tablets that have screens of less than nine inches, putting it on par with Google's Android, which is offered to device manufacturers for free.

Popular Stories

m1 chip slide

Five Years of Apple Silicon: M1 to M5 Performance Comparison

Monday November 10, 2025 1:08 pm PST by
Today marks the fifth anniversary of the Apple silicon chip that replaced Intel chips in Apple's Mac lineup. The first Apple silicon chip, the M1, was unveiled on November 10, 2020. The M1 debuted in the MacBook Air, Mac mini, and 13-inch MacBook Pro. The M1 chip was impressive when it launched, featuring the "world's fastest CPU core" and industry-leading performance per watt, and it's only ...
iOS 26

iOS 26.2 Available Next Month With These 8 New Features

Tuesday November 11, 2025 9:48 am PST by
Apple released the first iOS 26.2 beta last week. The upcoming update includes a handful of new features and changes on the iPhone, including a new Liquid Glass slider for the Lock Screen's clock, offline lyrics in Apple Music, and more. In a recent press release, Apple confirmed that iOS 26.2 will be released to all users in December, but it did not provide a specific release date....
All Screen iPhone 2027 Feature 1

Apple to Hide Selfie Camera Under Display of 20th Anniversary iPhone

Monday November 10, 2025 1:55 am PST by
Apple will conceal the front-facing camera under the screen of its 2027 iPhone, a Chinese leaker said today, corroborating reports that Apple's 20th anniversary iPhone will have no visible cutouts in the display. Weibo-based account Digital Chat Station said Apple's development of under-screen camera technology was progressing as planned for adoption in 2027, one year after it will...
iphone pocket%402x

Apple Debuts iPhone Pocket, a Limited Edition iPod Sock-Style Accessory

Tuesday November 11, 2025 1:23 am PST by
Apple has teamed up with Japanese fashion house ISSEY MIYAKE to launch iPhone Pocket, a 3D-knitted limited edition accessory designed to carry an iPhone, AirPods, and other everyday items. The accessory is like a stretchy pocket, not unlike an iPod Sock, but elongated to form a strap made of a ribbed, elastic textile that fully encloses an iPhone yet allows you to glimpse the display...
iphone air thinness

iPhone Air Sales Are So Bad That Apple's Delaying the Next-Generation Version

Monday November 10, 2025 11:41 am PST by
The thin, light iPhone Air sold so poorly that Apple has decided to delay the launch of the next-generation iPhone Air that was scheduled to come out alongside the iPhone 18 Pro, reports The Information. Apple initially planned to release a new iPhone Air in fall 2026, but now that's not going to happen. Since the iPhone Air launched in September, there have been reports of poor sales...
Early Black Friday Deals 1

The Best Early Black Friday Apple Deals on AirPods, Apple Watch, iPad, and More

Saturday November 8, 2025 6:16 am PST by
We're officially in the month of Black Friday, which will take place on Friday, November 28 in 2025. As always, this will be the best time of the year to shop for great deals, including popular Apple products like AirPods, iPad, Apple Watch, and more. In this article, the majority of the discounts will be found on Amazon. Note: MacRumors is an affiliate partner with some of these vendors. When ...
homepod mini colors

New HomePod Mini Coming Soon With These Features

Tuesday November 11, 2025 7:30 am PST by
Apple is expected to announce a new HomePod mini imminently, headlining with new chips. Here are all of the new features we're expecting. The second-generation HomePod mini is highly likely to contain a more up-to-date chip for more advanced computational audio and improved responsiveness. The current HomePod mini is equipped with the Apple Watch Series 5's S5 chip from 2019. Apple is likely ...
Apple fitness plus feature

Future of Apple Fitness+ 'Under Review'

Sunday November 9, 2025 5:30 am PST by
The future of Apple Fitness+ is "under review" amid a reorganization of the service, according to Bloomberg's Mark Gurman. In the latest edition of his "Power On" newsletter, Gurman said that Apple Fitness+ remains one of the company's "weakest digital offerings." The service apparently suffers from high churn and little revenue. Nevertheless, Fitness+ has a small, loyal fanbase that...
iphone black friday gold

The Best Early Black Friday iPhone Deals

Monday November 10, 2025 10:18 am PST by
Cellular carriers have always offered big savings on the newest iPhone models during the holidays, and Black Friday 2025 sales have kicked off at AT&T, Verizon, T-Mobile, and more. Right now we're tracking notable offers on the iPhone 17, iPhone 17 Pro, iPhone 17 Pro Max, and iPhone Air. For even more savings, keep an eye on older models during the holiday shopping season. Note: MacRumors is...
2024 iPhone Boxes Feature

Apple Adjusts Trade-In Values for iPhones, iPads, Macs, and More

Thursday November 6, 2025 11:12 am PST by
Apple today updated its trade-in values for select iPhone, iPad, Mac, and Apple Watch models. Trade-ins can be completed on Apple's website, or at an Apple Store. The charts below provide an overview of Apple's current and previous trade-in values in the U.S., according to its website. Maximum values for most devices either decreased or saw no change, but the iPad Air received a slight bump. ...

Top Rated Comments

KieranDotW Avatar
152 months ago
I just wish they'd get rid of Siri all together. I was probably one of the first people to turn it off on the iphone 4S.

If you can just turn it off, why do you care that other people have Siri on their phones?
Score: 45 Votes (Like | Disagree)
Spanky Deluxe Avatar
152 months ago
Oh hai, Microsoft! Welcome to 2011!
Score: 40 Votes (Like | Disagree)
AustinIllini Avatar
152 months ago
This will probably put Siri in third place.
Score: 36 Votes (Like | Disagree)
dBeats Avatar
152 months ago
Where's a good place to find Thai food around here?

"Just a sec......


....hmm that's strange....


....uh oh....


A fatal exception OE has occurred at 0028:C0011E36 in VXD VMM(1) + 00010E36. The current application will be terminated.

* Press any key to terminate the current application.
* Press CTRL+ALT+DEL again to restart your computer. You will lose any unsaved information in all your applications.

Press any key to continue _ "


I knew this Windows phone thing was a bad idea...
Score: 35 Votes (Like | Disagree)
sniffies Avatar
152 months ago
Very exotic-sounding name. When I hear 'Cortana', I envision an Amazonian woman wearing leopard skin around her hips with large juicy breasts.

CORRRR-TANA!!
Score: 30 Votes (Like | Disagree)
Kenrik Avatar
152 months ago
Nice "halo" throwback with the name.
Score: 27 Votes (Like | Disagree)