Testing was conducted using Siri on iOS 12.4, Google Assistant on Pixel XL running Android 9 Pie, and Alexa via the iOS app. Smart home devices tested include Wemo Mini plug, TP-Link Kasa plug, Phillips Hue Lights, and Wemo Dimmer Switch.
According to a 2019 survey comparing digital assistants in terms of their ability to understand and answer questions, Google Assistant outperformed Siri and Alexa, understanding 100 percent of the queries and answering almost 93 percent of them correctly. Apple's Siri and Amazon's Alexa answered respectively 83 percent and 80 percent of the queries correctly.
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Loup Ventures. (August 16, 2019). Share of questions answered and understood correctly by selected digital assistants as of 2019 [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 16, 2026, from /statistics/1133702/digital-assistant-intelligence-comparison/
Loup Ventures. "Share of questions answered and understood correctly by selected digital assistants as of 2019." Chart. August 16, 2019. ÌÇÐÄÆƽâ°æ. Accessed July 16, 2026. /statistics/1133702/digital-assistant-intelligence-comparison/
Loup Ventures. (2019). Share of questions answered and understood correctly by selected digital assistants as of 2019. ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 16, 2026. /statistics/1133702/digital-assistant-intelligence-comparison/
Loup Ventures. "Share of Questions Answered and Understood Correctly by Selected Digital Assistants as of 2019." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 16 Aug 2019, /statistics/1133702/digital-assistant-intelligence-comparison/
Loup Ventures, Share of questions answered and understood correctly by selected digital assistants as of 2019 ÌÇÐÄÆƽâ°æ, /statistics/1133702/digital-assistant-intelligence-comparison/ (last visited July 16, 2026)
Share of questions answered and understood correctly by selected digital assistants as of 2019 [Graph], Loup Ventures, August 16, 2019. [Online]. Available: /statistics/1133702/digital-assistant-intelligence-comparison/
