Two of the market’s hottest artificial intelligence stocks have delivered jaw-dropping gains over the past three years.
Palantir Technologies and Alphabet have both become investor darlings as the AI boom reshapes entire industries.
While GOOGL stock is up 273% since May 2023, PLTR stock is up a whopping 1,340%.
But with lofty price tags attached to both, a logical question emerges: which tech stock is the better buy right now?
The answer depends on which measuring stick you use. And one particular metric flips the conventional wisdom on its head.
Both tech stocks look expensive at first glance
Neither Palantir (PLTR) nor Alphabet (GOOGL) is cheap in the traditional sense. Both AI stocks trade at premiums that would make a value investor wince.
Palantir, which closed at $137.80 on May 8, 2026, carries a forward price-to-sales (P/S) ratio of 38.85x, a steep multiple by almost any standard.
Alphabet, which closed at $400.80 on the same day, trades at a more modest forward P/S of 9.56x.
So on revenue-based multiples, Palantir looks significantly pricier.
Both companies have earned those premiums. Over the past three years, PLTR and GOOGL shares have generated stellar returns for investors willing to hold through the volatility.
But past returns don’t make future entry points automatic bargains.
The 1 metric where Palantir wins on value
Here is where things get interesting.
Look at the NTM market cap-to-free cash flow multiple, essentially, how much investors are paying for every dollar of free cash flow a company is expected to generate over the next 12 months.
Palantir’s multiple sits at 70.29x, while Alphabet’s FCF multiple is much higher at a staggering 335.01x.
Alphabet investors are paying more than four times as much per dollar of forward free cash flow as Palantir investors are.
Free cash flow matters because it represents the real money left over after a company pays its bills and invests in growth.
It is the lifeblood of shareholder returns—dividends, buybacks, and reinvestment all flow from it. Paying 335x for it is a bold bet.
Why is Alphabet’s multiple so stretched? The company is spending aggressively to gain traction in the AI segment.
In the first quarter of 2026, Alphabet reportedcapital expenditures of $35.7 billion, predominantly for building out AI infrastructure.
Management also raised its full-year 2026 capital expenditure guidance to $180 billion to $190 billion and warned that 2027 spending will increase further.
All that spending pressures near-term free cash flow, inflating the multiple even as revenue soars.
Alphabet’s Q1 free cash flow came in at $10.1 billion, solid in absolute terms but modest relative to the company’s massive market cap, given the pace of reinvestment.
Palantir’s FCF is rapidly expanding
Palantir tells a very different story on the cash generation front.
In the first quarter of 2026, Palantir generated $899 million in operating cash flow and $925 million in adjusted free cash flow, representing a 57% free cash flow margin. The company ended the quarter with $8 billion in cash on hand.
To put that in perspective: Palantir’s quarterly free cash flow is now larger than its total quarterly revenue was just one year ago.
Chief Executive Officer Alex Karp made exactly that point on the company’s earnings call and stated.
CEO of Palantir Technologies Alex Karp is bullish on FCF growthFabrice COFFRINI/Getty Images
“Our free cash flow this quarter is larger than our revenue a year ago in the same quarter.”
That kind of cash-generation efficiency is rare in a company growing this fast. Palantir grew total revenue85% year-over-year in Q1 and guided to 71% full-year growth for 2026, all while posting a 60% adjusted operating margin.
Stellar growth, but very different capital strategies
The core distinction between these two companies is how they deploy capital.
Alphabet is spending at an almost unprecedented scale to build AI infrastructure, betting that the investment will pay off in cloud revenue and search dominance.
That strategy may prove correct given Google Cloudrevenue surged 63% year-over-year to $20 billion in Q1, and its cloud backlog nearly doubled sequentially to $462 billion. But the bill is enormous, and it weighs on near-term free cash flow.
Palantir, by contrast, runs lean.
The company famously operates with a tiny sales force—Karp noted on the earnings call that roughly seven salespeople are doing the work a typical company would assign to 7,000.
That operational discipline flows straight to the bottom line and into free cash flow.
Neither approach is wrong. They simply reflect different stages and strategies. But for investors hunting for relative value in the AI space, the free cash flow metric hands Palantir a clear edge over Alphabet at current prices.
ContentsBoth tech stocks look expensive at first glanceMore Palantir: The 1 metric where Palantir wins on valuePalantir’s FCF is rapidly expandingStellar…
ContentsBoth tech stocks look expensive at first glanceMore Palantir: The 1 metric where Palantir wins on valuePalantir’s FCF is rapidly expandingStellar…
ContentsBoth tech stocks look expensive at first glanceMore Palantir: The 1 metric where Palantir wins on valuePalantir’s FCF is rapidly expandingStellar…
