Amazon Alexa
virtual assistant service
Amazon Alexa, or simply Alexa, is a virtual assistant technology marketed by Amazon and implemented in software applications for smart phones, tablets, wireless smart speakers, and other electronic appliances and at Alexa.com.
Alexa was largely developed from the British computer scientist William Tunstall-Pedoe's Evi system and a Polish speech synthesizer named Ivona, acquired by Amazon in 2012 and 2013. From 2023 to 2025, Amazon shifted to an in-house large language model named Nova to be used in a new generation of Alexa, called Alexa+, that occasionally used Anthropic's Claude model.
Alexa was first used in the Amazon Echo smart speaker and the Amazon Echo Dot, Echo Studio and Amazon Tap speakers developed by Amazon Lab126. It is capable of natural language processing for tasks such as voice interaction, music playback, creating to-do lists, setting alarms, streaming podcasts, playing audiobooks, providing weather, traffic, sports, other real-time information and news. Alexa can also control several smart devices as a home automation system. Alexa's capabilities may be extended by installing "skills" (additional functionality developed by third-party vendors, in other settings more commonly called apps) such as weather programs and audio features. It performs these tasks using automatic speech recognition, natural language processing, and other forms of weak AI.
Most devices with Alexa allow users to activate the device using a wake-word, such as Alexa or Amazon; other devices (such as the Amazon mobile app on iOS or Android and Amazon Dash Wand) require the user to click a button to activate Alexa's listening mode, although, some phones also allow a user to say a command, such as "Alexa, go to bed" or "Alexa, wake". As of November 2018, more than 10,000 Amazon employees worked on Alexa and related products. In January 2019, Amazon's devices team announced that they had sold over 100 million Alexa-enabled devices.
This brief starts where responsible research should: with the source description of “Amazon Alexa” as virtual assistant service. Everything that follows is an evidence route, not borrowed authority.
Why this record matters
The subject matters to the general reference register because the source frames it as virtual assistant service. Its deeper value depends on whether names, dates, institutions and citations support that framing.
Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Sep 8, 2026. The linked authority identifier is Q28022144. None of the 3 selected statements returned an explicit reference. The first chronological checks are 2012, 2013, 2023 and 2025.
The absence of detail may reflect summary conventions rather than a lack of surviving documentation. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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This entry incorporates text from “Amazon Alexa” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.