Brett Molina

USA TODAY

Hoping to snag Amazon's Echo speaker just in time for Christmas? Forget about buying it online.

On Amazon's website, all versions of the Echo are sold out, and expected to restock after Christmas. The Echo Dot and Amazon's portable Tap speaker are back in stock on December 27.

Meanwhile, the standard Echo speaker in black isn't available until mid-January. Consumers can still purchase a version of the Echo in white, but it won't ship until December 30.

The Echo surged in popularity this year through Alexa, Amazon's voice activated digital assistant. Last month, Amazon said Cyber Monday sales of the Echo were up seven times compared to sales from the previous year. Both the Echo Dot and standard Echo were among Amazon's top-selling items during the shopping frenzy.

Other retailers including Best Buy, Home Depot, and Lowe's also sell the Amazon Echo.

The popularity of Echo has boosted interest in digital voice assistants. Earlier this year, Google rolled out the Google Home speaker enabled with its Google Assistant. Apple also boasts Siri, and reports suggest the tech giant is working on its own home speaker.

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