Appier Group, Inc. (OTC:APPIF) is one of the fastest-growing agentic AI stocks to buy.

The most interesting part about Appier is that the company is not merely describing itself as an AI software vendor in the vague, overused sense. The company now explicitly brands itself as an “Agentic AI-as-a-Service” provider, and on March 16, Appier released a whitepaper focused on autonomous marketing, framing agentic AI as a system for planning, execution, and continuous optimization rather than simple assistance. A few days earlier, on March 11, it announced new research aimed at improving the reliability of agentic AI systems through a risk-aware decision framework. That lines up with the company’s push to automate real business decisions inside marketing workflows.

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In mid February, Appier reported fiscal 2025 revenue of JPY 43.7 billion, up 28% year over year, and said its fiscal 2026 guidance implies another 24% increase to JPY 54.0 billion. The company said the outlook was driven by advancements in Agentic AI and dual-engine market penetration.

Appier Group, Inc. (OTC:APPIF) provides AI software for marketing, advertising, and customer engagement, with products built around data-driven targeting, personalization, and automated decision-making.

While we acknowledge the potential of APPIF as an investment, we believe certain AI stocks offer greater upside potential and carry less downside risk. If you're looking for an extremely undervalued AI stock that also stands to benefit significantly from Trump-era tariffs and the onshoring trend, see our free report on the best short-term AI stock.

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