5 Fastest-Growing Agentic AI Stocks to Buy

4. HubSpot, Inc. (NYSE:HUBS)

HubSpot, Inc. (NYSE:HUBS) is one of the fastest-growing agentic AI stocks to buy.

HubSpot’s agentic push is starting to show measurable traction rather than just branding varnish. In its earnings materials, the company said more than 8,000 customers had activated Customer Agent, which was resolving about 65% of conversations, while more than 10,000 had activated Prospecting Agent, up 57% quarter over quarter. HubSpot reinforced that point on April 2, 2026, when it announced outcome-based pricing for both products starting April 14, arguing that agents had sufficient customer and business context to be priced based on completed results rather than raw usage.

However, this remains an early and crowded category where many projects may not hold up. Gartner said on June 25, 2025, that more than 40% of agentic AI projects could be canceled by the end of 2027 because of rising costs, unclear business value, or inadequate risk controls. That caution matters for HubSpot too: the products look promising, but the long-term payoff still depends on execution and durable customer ROI.

The company reported its fourth-quarter results in early February, posting revenue of $846.7 million, up 20% year over year, while full-year 2025 revenue rose 19% to $3.13 billion. Management said 2025 was shaped by momentum in its “agentic customer platform,” with AI adoption accelerating as Breeze Customer Agent and Breeze Prospecting Agent delivered outcomes for customers.

HubSpot, Inc. (NYSE:HUBS) provides cloud-based software for marketing, sales, customer service, content management, operations, and commerce through a unified customer platform.