Skip to Content

New Virtual Helper Challenges Siri

An app named Evi uses semantic data to provide a wider range of answers.
January 27, 2012

The market for sweetly named smart-phone assistants is heating up, as Siri, Apple’s iPhone-based virtual helper, just got a new “frenemy” named Evi.

Questions and answers: The Evi smart-phone app uses semantic data from its platform as well as outside info to answer questions. You can ask questions aloud, or type them in.

Created by True Knowledge, a Cambridge, U.K.-based semantic technology startup, Evi, like Siri, can answer questions posed aloud in a conversational manner. But unlike Siri, which is only loaded on the latest iPhone, Evi is available as an app for the iPhone and phones running Google’s Android software.

Siri and other personal assistants are still fairly limited. As they become more popular, established companies and startups will need to expand the range of tasks they can perform. True Knowledge is hoping the semantic database it has built up over the past few years could provide this edge.

Evi’s availability and promise as an artificial intelligence app, coupled with its low price (99 cents on the iPhone and free on Android phones), caused its popularity to skyrocket following its Monday release, and made it difficult for those downloading it to try it outEvi isn’t the only Siri competitor—and in fact its capabilities are somewhat different from Siri’s offerings—but plenty of smart-phone users, it seems, are eager for Evi’s help in particular.

Evi uses a platform with hundreds of millions of data points that True Knowledge developed over several years (initially for Web search). Information in this database has been tagged to add meaning and context. For example, Apple is classified as a “company” and Tim Cook is classified as a “person” and a “CEO.” True Knowledge founder and CEO William Tunstall-Pedoe says this allows the app to understand all sorts of things—people, places, buildings, colors, and more—and how they interact, which helps the app find the right answer for a wide range of questions. In addition to all this information, Evi, like Siri, can access data on some outside websites.

Essentially, the app takes your spoken or typed question and uses its vast store of knowledge along with outside data from websites like Yelp to give pertinent answers. This is similar to how Siri works, but Apple’s assistant focuses more on accomplishing tasks, such as making calls, setting alerts, or dictating text messages, by working with the iPhone’s other apps. Evi does not do these things, but Tunstall-Pedoe says it will eventually be able to take on more tasks.

Digital helper: Evi aims to give answers instead of directing you to search the Web. You can rate the answer with a thumbs-up or thumbs-down.

For example, asking Evi, “What’s a good recipe for chocolate mousse?” yields specific recipes. Ask Siri the same question, and you’ll receive a suggestion to search the Web. Similarly, if you ask Evi, “When is the next national holiday?” the app will respond with Monday, February 20, which is Presidents’ Day. Siri pulls a result from computational knowledge service Wolfram Alpha that doesn’t make much sense.

Evi also understands what you like and don’t like, if you’re willing to share. If you think one of Evi’s answers is particularly good or bad, you can let it know by giving a thumbs-up or thumbs-down.

And while Siri allows only voice input, you can ask questions aloud or type them to Evi (both respond aloud and with on-screen text). On the iPhone, Evi, like Siri, uses technology from Nuance Communications to power the speech-recognition function, so True Knowledge charges 99 cents to cover its licensing costs. The Android version uses Google’s own speech recognition capabilities, so that app is free.

Nova Spivack, founder of semantic Web service Twine and CEO of social-media aggregation service Bottlenose, expects a smart-phone maker to license Evi for inclusion on its own handsets.

“I’m sure they’re desperately hunting for a Siri killer,” he says.

Unfortunately, many would-be users haven’t been able to experience it themselves yet. Since its Monday release, Evi’s servers have been inundated with traffic as tens of thousands of people have downloaded the app and attempted to pose their own queries. The app is currently only available in the U.S. and U.K.

Trying to ask Evi a question throughout much of the week usually elicited a response such as, “I’m on it” or “I’m working on it,” followed by “I’m having trouble getting a response from my servers. You might want to try again in a minute.”

This has caused a backlash from frustrated users, who have given it negative reviews on Apple’s App Store and Google’s Android Market.

The team behind Evi is working on it, though. Tunstall-Pedoe says the company has already added “huge” amounts of server capacity to handle the app’s popularity, and continues to do so.

And he’s confident that, once people are able to use it, they will like it. “At the heart, she understands what you’re saying,” Tunstall-Pedoe says.

Keep Reading

Most Popular

2021 tech fails concept
2021 tech fails concept

The worst technology of 2021

Face filters, billionaires in space, and home-buying algorithms that overpay all made our annual list of technology gone wrong.

conceptual illustration showing various women's faces being scanned
conceptual illustration showing various women's faces being scanned

A horrifying new AI app swaps women into porn videos with a click

Deepfake researchers have long feared the day this would arrive.

Death and Jeff Bezos
Death and Jeff Bezos

Meet Altos Labs, Silicon Valley’s latest wild bet on living forever

Funders of a deep-pocketed new "rejuvenation" startup are said to include Jeff Bezos and Yuri Milner.


A gene-edited pig’s heart has been transplanted into a human for the first time

The procedure is a one-off, and highly experimental, but the technique could help reduce transplant waiting lists in the future.

Stay connected

Illustration by Rose WongIllustration by Rose Wong

Get the latest updates from
MIT Technology Review

Discover special offers, top stories, upcoming events, and more.

Thank you for submitting your email!

Explore more newsletters

It looks like something went wrong.

We’re having trouble saving your preferences. Try refreshing this page and updating them one more time. If you continue to get this message, reach out to us at with a list of newsletters you’d like to receive.