New Delhi: Food delivery apps Zomato and Swiggy has developed a technical snag for a while. The customers aired their irk on social media platforms about ‘poor service’.

Both apps were back within half an hour but not before the social media were flooded with complaints from users unable to place orders or browse menus and listings.

The problem was caused by an Amazon web services snag, many online platforms rely on this service. Customer support handles of both companies responded to the messages saying they were working to resolve the temporary glitch.

Swiggy cares tweeted to one customer, “ Hi there. We're currently unable to process your request as we're experiencing technical constraints. Not to worry, our best minds are on it and we'll be up and running soon”.

Zomato responded to one of his customers, “Hi Sahil, we are facing a temporary glitch. Please be assured our team is working on this and we will be up and running soon”.

A Zomato delivery partner said he wasn't able to fulfil an order midway due to the app glitch. "I cannot come for delivery as the app is down," said a Zomato delivery partner to a patron on the phone. The delivery guy, who had been waiting on a road in south Delhi's Greater Kailash-1, said, "The app is down. I cannot deliver, according to instructions from Zomato."

The two platforms - valued at around $10 billion each - dominate India's online food delivery market in a duopoly that only this week attracted the attention of India's antitrust watchdog, NDTV reports says.

The Competition Commission of India (CCI) on Monday said it had ordered an investigation of the apps offered by both companies to verify if they were "neutral", Reuters reported.

The order came months after the National Restaurant Association of India (NRAI) asked the CCI to investigate the companies for breaching platform neutrality by providing priority to exclusive contractors.