Got $5,000? 2 Growth Stocks Building the Software Backbone of Artificial Intelligence (AI).

Artificial intelligence (AI) has been a gold mine for companies selling chips and building data centers. But without software, those AI chips don't really have anything to do.

That's why I think software stocks are as important as chipmakers and hyperscalers when you consider how to invest in the AI build-out. The more companies depend on AI, the more important those software services become.

Two companies that stand to benefit are Microsoft (NASDAQ: MSFT) and CrowdStrike (NASDAQ: CRWD). They approach AI from different directions, but both are already seeing growing demand for their products. With $5,000 to invest, I'd consider splitting my money equally between these two outstanding software stocks.

Image source: The Motley Fool.

1. Microsoft

You likely already use Microsoft software, though you may not realize it. Microsoft makes some of the most popular software programs, such as Word, Excel, PowerPoint, and Outlook. All of them are available in the company's popular Microsoft 365 suite.

In addition, its Azure cloud platform supplies the infrastructure needed to develop and run AI applications. Azure AI Foundry provides tools for developers to build those applications, while GitHub Copilot helps them write code.

The strategy is paying off. In Microsoft's fiscal first quarter of 2027, which ended Sept. 30, Azure and other cloud services revenue increased 48% year over year to $33.16 billion.

Microsoft has also incorporated Copilot in its 365 software suite of office tools. During the quarter, Microsoft reported that daily Copilot users increased nearly 50% sequentially and more than fivefold year over year. The number of customers with more than 50,000 Copilot seats also increased more than eightfold year over year. That's particularly encouraging because it demonstrates that businesses are willing to pay for AI capabilities within software they already use.

Microsoft reported $677 billion in commercial remaining performance obligations, representing contracted revenue that hasn't yet been recognized. That figure increased 73% year over year, although commitments from OpenAI contributed substantially to the growth.

If there's a downside to Microsoft stock now, however, it's in spending. Microsoft is dropping billions of dollars every quarter to satisfy AI demand. Capital expenditures reached $45.2 billion in the quarter, and management expects spending to increase to $50 billion in Q2.

Those investments are putting pressure on margins, and there's no guarantee they'll produce the returns investors expect.

Still, Microsoft generated $18.6 billion in quarterly free cash flow despite its spending. That gives the company considerable financial flexibility as it expands its AI business.

2. CrowdStrike

While AI offers businesses new opportunities to develop new products and work more efficiently, it also creates new opportunities for cybercriminals. And unfortunately, there are always bad actors looking for an opportunity to break the rules and make a quick buck.

Companies that deploy AI agents capable of accessing sensitive information and performing tasks without constant human supervision are susceptible to cyberattacks, and CrowdStrike addresses these risks through its Falcon cybersecurity platform.

During the company's fiscal second-quarter earnings call, CEO George Kurtz discussed the emerging market for AI detection and response (AIDR). He suggested that protecting AI agents could eventually become a larger business than traditional endpoint detection and response.

That's an ambitious prediction, but CrowdStrike's existing business is already producing impressive results. In the quarter ended July 31, revenue increased 26% year over year to $1.47 billion. Annual recurring revenue (ARR) reached $5.84 billion, up 25%, while net new ARR jumped 51% to a record $333 million.

And there's evidence that customers are expanding their relationships with CrowdStrike. The company reported that ARR from accounts adopting its Falcon Flex subscription model exceeded $2.29 billion, up 101% from the previous year. Falcon Flex allows customers to adopt additional security products under a flexible purchasing arrangement.

So, CrowdStrike doesn't have to rely exclusively on finding new customers. It can generate additional revenue by selling more services to businesses already using its platform.

As businesses adopt AI and introduce new security vulnerabilities, CrowdStrike has an opportunity to expand well beyond its original endpoint protection business.

Two different ways to invest in AI software

Microsoft and CrowdStrike aren't competing for the same AI opportunity. Microsoft provides the infrastructure and applications that businesses use to develop and deploy AI. CrowdStrike provides security services that could become increasingly necessary as those applications gain access to more sensitive systems and information.

Both have demonstrated that customers are willing to pay for their services. For long-term investors, that's a more compelling argument than simply betting that AI will continue to grow.

Patrick Sanders has no position in any of the stocks mentioned. The Motley Fool has positions in and recommends CrowdStrike and Microsoft. The Motley Fool has a disclosure policy.