Cognex vs. Power Integrations: Which Auto Tech Stock Is a Better Buy in 2026?

Cognex reported FY 2025 revenue of $994.4 million, up 8.7%, with net income of $114.4 million, free cash flow of $236.8 million, and management guiding to 12% revenue growth to about $1.1 billion in 2026 and net income of $240 million. Power Integrations also grew revenue 5.9% to $443.5 million, but its margin was weaker at 5.0% and customer concentration remains high, with its top 10 customers accounting for roughly 80% of revenue. The article favors Cognex on valuation and growth, citing a 33.9x forward P/E versus 56.5x for Power Integrations.

Analysis

The market is rewarding the cleaner compounding story, not the cheaper sales multiple. Cognex has the better setup because its growth is more self-help driven: if management can convert AI-enabled product refreshes into share gains, the earnings leverage is meaningful and the balance sheet gives it room to absorb a demand wobble without diluting shareholders. Power Integrations looks optically resilient on liquidity, but that masks a more fragile earnings quality profile: concentration, foundry dependence, and SBC-heavy cash generation make it a less reliable way to express industrial electrification.

Second-order, Cognex is a levered bet on capex normalization across factories and logistics, which means the upside is strongest if the industrial cycle keeps improving into 2H26 rather than stalling after a short rebound. The key catalyst is not just revenue growth; it is gross margin stability as software mix and AI features offset pricing pressure from larger automation platforms. If that margin mix slips, the multiple can compress fast because the market is already paying for forward execution.

POWI is the more vulnerable name if semiconductor demand turns choppy or if a single foundry issue hits deliveries, because the business lacks the diversification that would cushion a supply shock. The consensus is probably underestimating how much of its apparent cash generation is being manufactured by stock comp add-backs, which can support valuation in the short run but not the long run. The stock can work tactically on a cyclical bounce, but it is not the higher-quality 2026 compounder.

The contrarian angle: CGNX may not be "cheap" versus the market, but it is cheap relative to the durability of its end-market adoption if AI meaningfully improves inspection accuracy and deployment speed. By contrast, POWI looks statistically cheaper on sales but that multiple is not compelling unless investors believe margin recovery is both broad-based and durable, which is the harder case to make.

Key Decisions for Investors

• Long CGNX into any post-earnings pullback over the next 1-3 months; target a re-rating if 2026 guidance proves credible, with upside from margin expansion more than the current 33.9x forward P/E suggests.
• Avoid initiating new longs in POWI unless the stock de-risks on a 10-15% drawdown or management shows clear evidence that customer concentration is easing; the risk/reward is poor because revenue can look fine while earnings quality deteriorates.
• Pair trade: long CGNX / short POWI for 3-6 months to capture the cleaner balance-sheet and earnings-quality premium versus a name exposed to foundry and customer-concentration risk.
• For more aggressive exposure, buy CGNX call spreads 6-9 months out to express upside from an industrial capex recovery without paying full delta for a market that may already expect some of the growth.
• If holding POWI, use it as a trading position only and size it smaller than CGNX; trim on strength because any semiconductor cyclical slowdown or supply disruption could unwind the valuation quickly.