OpenAI
ChatGPT
ChatGPT is OpenAI's AI assistant, released in November 2022, that answers questions, writes and analyses text, code, images and files, searches the web and carries out multi-step tasks on the web, iOS, Android, macOS and Windows.
Directory
Assistant directory
One page per assistant and device, each opening with a plain one-sentence definition, followed by key facts, pricing, the latest news and the comparisons it appears in. Facts are checked against the vendor's own announcements and every page shows the date it was last verified.
AI assistants
Anthropic
Claude
Claude is Anthropic's AI assistant, first released in March 2023, used for writing, analysis, research and coding in its web, desktop and mobile apps and through Anthropic's API.
Gemini
Gemini is Google's AI assistant, available as the Gemini app on the web, Android and iOS and built into Android, Chrome, Google Workspace and Google Home devices, powered by Google's Gemini family of models.
Voice assistants
Apple
Siri
Siri is Apple's voice assistant, introduced with the iPhone 4S in 2011; with iOS 27, released on September 14, 2026, Apple rebuilt it as Siri AI, a conversational assistant with personal context, on-screen awareness and actions inside apps.
Amazon
Alexa+
Alexa+ is Amazon's generative-AI voice assistant, announced on February 26, 2025, that succeeds the original Alexa on Echo devices, Fire TV, the Alexa app and Alexa.com; it is free with Amazon Prime and costs $19.99 a month in the US without Prime.
Devices
Amazon
Amazon Echo
Amazon Echo is Amazon's family of smart speakers and smart displays, including Echo Dot, Echo Studio and Echo Show, built around the Alexa voice assistant and, since 2025, Alexa+.
Google Home Speaker
Google Home Speaker is Google's smart speaker built for Gemini for Home, released on June 25, 2026 at $99.99 in the US; it is Google's first new standalone smart speaker since the Nest Audio in 2020.
Meta
Ray-Ban Meta (Gen 2)
Ray-Ban Meta (Gen 2) are camera-equipped AI glasses made by Meta and EssilorLuxottica with the Meta AI assistant built in, released on September 17, 2025 from $379 in the US, with up to eight hours of typical battery life and 3K Ultra HD video.