AppLovin vs. Trade Desk: Which Technology Stock Is a Better Buy in 2026?

Digital advertising is evolving rapidly as software and automation change how brands reach consumers. Investors must decide between the high-speed growth of AppLovin (NASDAQ:APP) and the platform dominance of Trade Desk (NASDAQ:TTD).

AppLovin focuses on AI-powered mobile app monetization, while Trade Desk provides a massive self-service platform for buying ads across connected TV and video. Both companies sit at the center of the modern advertising ecosystem, yet they offer distinct financial profiles that cater to different types of growth-oriented investors.

The case for AppLovin

AppLovin provides advertising software that helps businesses automate marketing across mobile apps, websites, and connected TV. The company serves a globally diverse customer base in the tech stocks landscape, with a heavy focus on mobile gaming inventory and in-app advertising. Following the divestment of its Apps business in June 2025, it has focused entirely on its high-growth software and AI-driven advertising solutions.

In FY 2025, revenue reached nearly $5.5 billion, which represents a massive 70% increase compared to the prior year. The company also reported net income of close to $3.3 billion, leading to an impressive net margin of approximately 60.8%. This expansion in net margin from 49% in 2024 shows that the company is scaling its software business with significant profitability.

As of its December 2025 balance sheet, the debt-to-equity ratio was roughly 1.7x. The debt-to-equity ratio compares total debt to shareholder equity to show how a company is financed. The current ratio, which measures a company's ability to cover its short-term debts with its short-term assets, was approximately 3.3x. Free cash flow for the period reached close to $3.9 billion.

The case for Trade Desk

Trade Desk serves advertising agencies and brands through its self-service, cloud-based platform. The company relies on decentralized decision-making at large advertising holding companies, but this creates significant concentration. For the 2025 fiscal year, two holding companies each accounted for more than 10% of gross billings. Customer concentration like this adds a layer of risk to the business, especially given that Publicis has already removed its relationship.

In FY 2025, revenue reached approximately $2.9 billion, representing growth of nearly 18.5%. The company reported net income of close to $443.3 million for the year. This resulted in a net margin of approximately 15.3%, which is a slight decrease from the 16.1% net margin reported in the previous fiscal year.

As of its December 2025 balance sheet, the debt-to-equity ratio was low at roughly 0.2x. The current ratio stood at approximately 1.6x, indicating a healthy ability to manage short-term liabilities. Free cash flow for FY 2025 was close to $795.7 million.

Risk profile comparison

AppLovin faces challenges from its heavy reliance on third-party mobile platforms, particularly the policies set by Alphabet and Apple (NASDAQ:AAPL). Changes to how these platforms handle data can significantly hurt advertising effectiveness and revenue. Furthermore, the company is dealing with ongoing securities class action litigation that began in 2025, which adds a layer of legal uncertainty to its financial outlook.

Trade Desk is grappling with high client concentration, as two advertising holding companies recently accounted for more than 10% of its gross billings. The loss of a major relationship highlights the vulnerability of its agency-based model. Additionally, the company must navigate a federal securities fraud lawsuit filed in 2026 and the recent loss of three senior executives, which has weighed on investor sentiment.

Valuation comparison

AppLovin appears more attractively valued on an earnings basis, while Trade Desk trades at a significantly lower multiple of its total annual sales.

Valuation metrics sourced from Financial Modeling Prep (FMP) and may differ from other data providers.

Which stock would I buy in 2026?

I'd go with AppLovin, though this is a closer call than it might appear. Both companies had disappointing quarters and neither is firing on all cylinders right now.

Trade Desk's situation looks more structurally challenging. Revenue grew at just 3% year over year, well below its own expectations, as advertisers in key categories like consumer goods and automotive pulled back spending. Q3 guidance implies revenue is expected to drop in the quarter ahead, and the CEO acknowledged the quarter did not meet the company's own standards.

AppLovin, despite its own stumbles, is operating a more profitable business with higher margins and an AI advertising engine still expanding into new verticals. The long-term opportunity in mobile and e-commerce advertising is larger and less dependent on any single advertiser category.

Neither stock is an easy buy right now. But AppLovin's business model is more durable than Trade Desk's current results suggest, and patient investors may find it rewarding as the advertising market stabilizes.

Sara Appino has positions in Apple. The Motley Fool has positions in and recommends Apple and The Trade Desk. The Motley Fool has a disclosure policy.