1 Magnificent Artificial Intelligence (AI) Stock to Buy With $25 Before 2026 Is Over

As we approach the end of 2026, the S&P 500 index is hovering near an all-time high. However, there are still some attractive opportunities on the table, even in the red-hot artificial intelligence (AI) space.

SentinelOne (NYSE: S) is a leading cybersecurity company that relies heavily on AI to deliver highly automated protection to its enterprise customers. Its stock has soared by 47% so far this year, but it's still much cheaper than its top competitors CrowdStrike and Palo Alto Networks .

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Investors can scoop up a single share in SentinelOne for under $25. Here's why it could be a great addition to a diversified portfolio before this year is over.

AI can be a powerful tool for enterprises, but it also broadens the attack surface for hackers. Every time a business deploys an AI chatbot or agent, it compromises the safety of its sensitive data and valuable digital assets, which is why businesses need state-of-the-art protection.

SentinelOne's Singularity platform is a holistic solution designed to secure endpoints (computers and devices), cloud networks, employee identities, AI applications, and more. It not only protects against breaches but also offers powerful remediation features to help enterprises restore their networks after a successful attack, minimizing downtime.

On the AI security front, SentinelOne has developed critical new tools, such as Prompt Security. It's designed to protect against new-age attacks like prompt injection, where hackers try to manipulate chatbots and agents into handing over sensitive data by disguising malicious commands as legitimate prompts. Prompt Security also inventories every chatbot and agent deployed by the enterprise, so it immediately knows if an unauthorized application is trying to orchestrate a breach.

Then there is Purple AI, an agentic assistant embedded into the Singularity platform. SentinelOne knows human analysis is no match for modern attack speed, so it designed Purple AI with advanced reasoning to autonomously investigate and take action when threats arise.

SentinelOne had $1.2 billion in annual recurring revenue (ARR) at the conclusion of its recent fiscal 2027 second quarter (ended July 31), an increase of 22% compared to the year-ago period. However, the company said the ARR attributable to AI products such as Purple AI and Prompt Security nearly tripled , so it's clear that enterprises are prioritizing this new-age protection.