Fastly's 23% Q2 Jump Is Impressive-But Cash Flow Is the Real Test

Fastly's Q2 profit turn is clear; cash conversion is still the hard part

Fastly's operating turn looks real. The company posted record second-quarter revenue of $183.3 million, up 23% year over year, and non-GAAP operating income of $27.0 million. That is a meaningful improvement in profitability.

The catch is cash. Free cash flow of $3.6 million left that debate alive. A stronger profit line is encouraging, but investors still need evidence that Fastly can convert those gains into cash at scale.

Management also raised the bar. The company now guides to full-year revenue of $739.0 million and full-year EPS of $0.52. From here, the question is not just whether Fastly can improve, but whether it can sustain that improvement and back it with cash.

Mixed revenue, retention, and margin gains make the turnaround more credible

Before focusing on cash, it helps to see what actually improved in the operating engine.

Security is becoming a more important growth driver

The mix is getting healthier. In Q2, security revenue of $41.7 million grew 43% year over year, well ahead of total revenue growth. A broader mix matters because it reduces reliance on a single growth lever.

Customers are staying and expanding

Fastly also reported LTM NRR of 117%, its highest level in over three years. That suggests existing customers are not only renewing, but also buying more over time.

There is more visibility in the backlog as well. Fastly ended the quarter with remaining performance obligations of $341 million, up 38% year over year. That does not guarantee revenue, but it does point to more committed future revenue than a purely transactional model would typically provide.

Margins improved alongside growth

Fastly also delivered record second-quarter gross margin of 63.3% and record non-GAAP gross margin of 65.8%. Growth plus better margins is a stronger combination than growth alone, because it suggests the company is selling a more valuable mix of products rather than simply discounting to grow.

The debate now: can Fastly turn better profits into better cash flow?

The operating improvement is easy to see. Fastly's record second-quarter revenue of $183.3 million, non-GAAP operating income of $27.0 million, and LTM NRR of 117% all point to a better-running business.

Why bulls are getting more interested

Bulls are focused on the guide-up. In addition to Q2 results, Fastly now expects Q3 revenue of $187.0 million, full-year revenue of $739.0 million, and full-year EPS of $0.52. If that higher outlook holds, investors can start pricing in a faster path to profitability rather than just a turnaround narrative.

There is also a near-term checkpoint. Fastly has scheduled Investor Day on September 22, 2026, which gives investors a defined opportunity to test whether management's higher expectations are credible.

Why bears still have a case

The bear case is straightforward: free cash flow of $3.6 million came in below expectations and below the prior-year level. That does not invalidate the operating improvement, but it does mean the quality of the turn is still under review.

Investors will want to know whether the cash shortfall was mostly timing-related or a sign that Fastly still has work to do in converting earnings into cash.

What needs to happen for Fastly to deserve a higher multiple

The next step is not simply more growth. It is proof that the growth, retention, and margin gains can compound.

Three signposts matter most

First, management has to keep the outlook credible. The market already has a near-term test with Q3 revenue of $187.0 million. Clear follow-through would suggest the Q2 guide-up reflected confidence rather than optimism bias.

Second, investors want evidence that growth is getting healthier, not just faster. That means keeping the momentum in security revenue and LTM NRR of 117% in focus through commentary and future results.

Third, and most important, investors need to see earnings turn into cash. Until that happens, the stock may remain trapped in turnaround mode rather than earning a meaningfully richer multiple.

Why September 22 is a useful catalyst window

Fastly has already set up Investor Day on September 22, 2026. That makes the next stretch more than a passive waiting game.

Watch for three things: - whether management ties Q2 momentum to the Q3 revenue of $187.0 million guide and the full-year outlook - whether security and retention remain framed as durable drivers, not just one-quarter highlights - whether management directly addresses the gap after free cash flow of $3.6 million

The take-away

The setup is constructive, but not yet proven. If Fastly keeps its near-term guide and gives investors a clearer path from operating improvement to cash generation, the market can move from cautious optimism to stronger confidence. Until then, the cash test remains the most important one.