Sonder rooms can no longer be booked via the Marriott site and app. Marriott said it was helping people who booked via its own platforms but was advising those who booked via a third party to ask for a refund via their credit card issuer.
"Sonder has faced severe financial constraints arising from, among other things, prolonged challenges in the integration of the company's systems and booking arrangements with Marriott International," Sonder said in a statement on its website.
Seen as a rival to Airbnb, which offers alternatives to traditional hotels, Sonder focussed on premium serviced apartments and lodgings.
Founded in Montreal, it operates thousands of rooms in over 40 cities, all of which will now be closing as the firm seeks insolvency proceedings in all territories it operates in.
"We are devastated to reach a point where a liquidation is the only viable path forward," said Janice Sears, Sonder's interim chief executive.
She added its integration with Marriott was "substantially delayed due to unexpected challenges in aligning our technology frameworks", which she said resulted in significant costs.
She said there was a sharp decline in revenue "arising from Sonder's participation in Marriott's Bonvoy reservation system".
Marriott Bonvoy is a booking and rewards system operated by Marriott.
One man said he had received no communication about his cancelled Sonder reservation, that there was no way to contact the firm online, and said it was "causing significant worry".