Alexa is a voice service developed by Amazon, made popular by the Amazon Echo and the Amazon Echo Dot devices developed by Amazon Lab126.

From Wikipedia:

Alexa is a voice service developed by Amazon, made popular by the Amazon Echo and the Amazon Echo Dot devices developed by Amazon Lab126. Out of the box, it is capable of voice interaction, music playback, making to-do lists, setting alarms, streaming podcasts, playing audiobooks, and providing weather, traffic, and other real time information, such as news. Developers can expand on the experiences supported by Alexa powered devices by developing "skills". Alexa can also control several smart devices using itself as a home automation system.

Interaction and communication with Alexa is available in English (US), English (CA), English (UK), English (AU), English (IN), French (CA), French (FR), Spanish (ES), Spanish (MX), Spanish (US), Portuguese (BR), German (DE), Italian (IT), Japanese (JP), and Hindi (IN)