Amazon is aware of the macro challenges, and hence AWS employees are reaching out to clients to see how it can help optimize spending, said David Brown, AWS' vice president.

"If you're looking to tighten your belt, the cloud is the place to do it," AWS CEO Adam Selipsky said during his keynote presentation.

However, an investment firm Andreessen Horowitz analysis last year, painted a different picture. It showed that a company could trim its computing costs by half or more by bringing workloads from the cloud back to on-premises data centers.

Amazon is also offering a cheaper alternative, Graviton computing instances based on energy-efficient Arm-based chips alternative to standard Advanced Micro Devices, Inc (NASDAQ:AMD) and Intel Corp (NASDAQ: INTC) processors.

"We do see some customers who are doing some belt-tightening now," Selipsky told CNBC. Expedia Group, Inc (NASDAQ: EXPE) CEO Peter Kern sees the cloud as an area where his company can reduce its fixed costs.

Eoin Treacy's view

The point I have been making for at least the last year is large companies offering cloud services saved startups time in scaling up. Instead of buying servers and hiring teams or engineers to create a data base, they outsourced that to companies like Amazon, Microsoft and Google/Alphabet. As the fountain of money supporting the startup scene ebbs, that will inevitably hit spending on outsourced data infrastructure. The subscription business model only works when you have subscribers.

Amazon continues to trend lower and is sustaining the break below $100.
Microsoft is a higher margin business and has held up better but is pausing in the region of the 200-day MA.
Alphabet remains in a consistent medium-term downtrend and is currently testing the lower side of the overhead trading range and the 1000-day MA. 
Salesforce appears to be on the cusp of breaking lower to reassert the medium-term downtrend.