Cortana vs Siri

Cortana is your personal assistant on your Windows Phone. She's there to help make things easier for you and keep you up to date on the things that matter to you. Whether it’s to keep you looped in with your world or help you manage your everyday life, Cortana is there for you.
Talk to Siri as you would to a friend and it can help you get things done — like sending messages, placing calls, or making dinner reservations. You can ask Siri to show you the Orion constellation or to flip a coin. Siri works hands-free, so you can ask it to show you the best route home and what your ETA is while driving. And it’s connected to the world, working with Wikipedia, Yelp, Rotten Tomatoes, Shazam, and other online services to get you even more answers. The more you use Siri, the more you’ll realize how great it is. And just how much it can do for you.
Comparing Cortana vs Siri is like comparing apples to oranges. Because your business is unique and nobody except you can decide, which is better for your company. But we can add some fun to your research and suggest some new comparison parameters.

Ok, now let's compare the UI. Looks like Cortana has more user-friendly interface than Siri because it's bigger. At least on our screenshots

To compare the popularity of the solutions we counted how many alternatives people search for each of them on the Internet. And it turns out that Siri is more popular than Cortana

Now let's look at the recent activities of our competitors:

- Cortana arrived in Skype (in 2017)
- iOS 11 gets windows and file system. Siri gets a translator (in 2017)
- Microsoft redesigned Cortana for iPhone and Android (in 2016)
- Siri lands on the desktop (in 2016)
- Microsoft integrates Cortana into Power BI service (in 2015)
- Microsoft released Cortana for Android (in 2015)
- Parallels Desktop 11 brings Cortana to Mac (in 2015)
- Microsoft announced voice-enabled Big Data platform Cortana Analytics Suite (in 2015)
- Siri becomes Proactive to compete with Google Now (in 2015)
- Microsoft will bring Cortana to Android and iOS (in 2015)

Looks like Cortana was recently more active than Siri (at least in our news). We also found some news, in which Cortana and Siri meet head to head:

2015 - Microsoft released Cortana for Android. Siri keeps calm

Microsoft released beta version of Cortana on Google Play. Cortana on Android has much of the same functionality as the Windows version of the assistant. You can use the app to set reminders, search the web and add items to your calendar. The Android app also comes with the same "notebook" feature, which lets you tweak Cortana's personalized recommendations for nearby restaurants, news alerts, weather updates, sports scored and other categories based on your previous habits and interests. There are, however, a few limitations to the Android app. You can't use Cortana to adjust your phone's settings, launch other apps or use the "Hey Cortana" command to initiate a query. But you can make the assistant feel a little more like a native part of Android by replacing the Google Now shortcut with Cortana when you long press on the home key.