Astera Labs vs. Marvell Technology: Which AI-Driven Tech Stock Is a Better Buy in 2026?

Investors seeking exposure to artificial intelligence infrastructure must weigh the explosive growth of Astera Labs Inc (NASDAQ:ALAB) against the established scale and diverse portfolio of Marvell Technology Inc(NASDAQ:MRVL) to determine the better buy.

Both companies focus on the plumbing of the digital world, ensuring data moves quickly between processors and memory. While Astera Labs focuses on specialized connectivity for AI racks, Marvell offers a broader range of networking, storage, and custom compute solutions. This comparison explores which strategy offers more potential for long-term investors.

The case for Astera Labs

Astera Labs designs connectivity solutions that integrate various protocols to support rack-scale AI infrastructure, a high-growth niche among semiconductor stocks. The company serves major hyperscalers and equipment manufacturers who need to overcome data bottlenecks in massive data centers, though its revenue is highly concentrated. In 2025, one end customer -- Amazon.com Inc (NASDAQ:AMZN) -- accounted for over 70% of revenue, which adds a significant layer of risk to the business model.

According to its latest annual report, filed for the fiscal year ended Dec. 31, 2025, revenue reached close to $853 million, representing a significant jump of 115% compared with the prior fiscal year. This growth trajectory helped the company transition to a net income of just over $219 million after recording losses in the previous two years. The net margin for the latest year was close to 26%.

As of its December 2025 balance sheet, the debt-to-equity ratio was 0.0x, meaning the company carries no debt relative to its shareholder equity, while the so-called current ratio was 10.2x. Free cash flow for the period reached nearly $282 million. Note that stock-based compensation (SBC) represented roughly 50.1% of operating cash flow, which inflates reported cash generation since SBC is a non-cash expense added back in the cash flow statement.

The case for Marvell Technology

Marvell Technology provides data infrastructure semiconductors across AI, cloud, and enterprise markets. The company recently expanded its custom silicon partnership with Alphabet Inc (NASDAQ:GOOGL) to develop AI accelerators and networking components through 2033. It maintains a concentrated yet diverse customer base, with two customers each representing at least 10% of net revenue in its most recent fiscal year.

In its latest annual report, filed for the fiscal year ended Jan. 31, 2026, revenue reached nearly $8.2 billion, which is a 42% increase year over year. The company reported net income of close to $2.7 billion, resulting in a net margin of just about 33%. This performance marked a substantial recovery from the net losses reported in the two previous fiscal years.

According to its January 2026 balance sheet, the debt-to-equity ratio was approximately 0.3x, while its current ratio of 2.0x indicates it has twice as many current assets as current liabilities. Free cash flow for the most recent fiscal year was roughly $1.4 billion. Note that stock-based compensation (SBC) represented roughly 34% of operating cash flow, which inflates reported cash generation since SBC is a non-cash expense added back in the cash flow statement.

Risk profile comparison

Astera Labs faces significant risks from its heavy reliance on a small group of hyperscalers, as the loss of a major client would materially harm its finances. The company also deals with rapid technological obsolescence and must constantly innovate to support new standards like PCIe 6.0 and CXL. Because it uses a fabless model, it depends entirely on Taiwan Semiconductor Manufacturing Co (NYSE:TSM) for production, and trade restrictions involving China could further limit its market access.

Marvell Technology deals with intense competition from established leaders like Broadcom Inc (NASDAQ:AVGO) and Nvidia Corp (NASDAQ:NVDA), as well as customers who may design their own chips. Its $4.5 billion debt load limits its ability to react to economic downturns or finance new projects, while its reliance on partners in the Pacific Rim creates geopolitical vulnerability. Strategic acquisitions of smaller firms like Celestial AI carry risks of integration failure or future impairment charges if anticipated synergies are not realized.

Valuation comparison

Marvell Technology appears more conservatively valued on a sales basis, while Astera Labs commands a premium for its faster growth rate.

A Forward P/E ratio helps you compare the price of a stock against future earnings estimates, while the P/S ratio measures market value against total sales.

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

Which stock would I buy in 2026?

Marvell's business is seen growing at about a 25% clip in the current fiscal 2027 to more than $12 billion revenue. Yet analysts expect net income to drop by around $1 billion to the ballpark of $1.6 billion. There are also some fears that its arrangement with Alphabet will take longer to generate significant revenue than previously expected.

Still, management is very bullish about the potential for on-board optics sales to AI data centers in the coming years. The OBO (also referred to in shorthand as NPO) business was $0 for Marvell earlier this year, and it will contribute about $300 million by the end of its fiscal 2027, the current year. In a few years, management indicates OPO/NPO will be much larger, though holding off on naming specific dollar figures yet. But it is worth noting Marvell is pitching the area as a new source of significant sales investors should expect.

Astera Labs, meanwhile, sees its business providing connectivity for AI data centers -- meaning chips that let CPUs, GPUs, memory, and storage inside an AI rack communicate, surging due to hyperscaler demand. Hyperscalers, those very large AI businesses, are expected to spend more than $1 trillion on tech in 2027.

Astera Labs delivered excellent results in the second quarter of 2026, as reported last month, with record revenue of $392.4 million, up 104% year over year. The performance was driven by broad-based strength across its product portfolio, reflecting the diversification of its business as it continues to win new designs from multiple customers and across multiple product categories. Wall Street sees sales more than doubling in 2026 to $1.9 billion, with net income of $588 million, also well more than double 2025 levels.

Both these stocks are enjoying the AI boom, and both are fully priced as growth stocks, as seen in their P/S and forward P/E ratios, above. Astera's quick growth could bring growing pains, and its overreliance on Amazon is a concern, yet we like it better than Marvell, given the company's general reliance on the emergence of the OPO/NPO product line as a source of future growth. It's still a very young business line to be betting on when Asatera Labs is showing excellent growth right now.

Brendan Coffey has no position in any of the stocks mentioned. The Motley Fool has positions in and recommends Alphabet, Amazon, Broadcom, Marvell Technology, Nvidia, and Taiwan Semiconductor Manufacturing. The Motley Fool recommends Astera Labs. The Motley Fool has a disclosure policy.