Fastly (FSLY) is drawing attention after announcing plans to host its 2026 Investor Day at the Nasdaq MarketSite in New York City on September 22, with executives set to present business updates.

Fastly’s share price has climbed 19.01% over the past month and is up 103.34% year to date, while the 1 year total shareholder return of 191.01% contrasts with a 5 year total shareholder loss of 58.41%. This suggests strong recent momentum following prior weakness.

If Fastly’s rebound has your attention, this could be a useful moment to broaden your watchlist and check out 53 AI infrastructure stocks

Fastly has rerated sharply, yet still trades at a double digit discount to both analyst targets and some estimates of intrinsic value. Is the market prudently discounting its losses, or underpricing the recent progress?

Most Popular Narrative: 316.9% Overvalued

Fastly last closed at $20.72, yet the most followed narrative pegs fair value far lower at $4.97, creating a wide gap between story and price.

FSLY is one of those companies, offering Edge Computing services (processing data in localised servers rather than sending it to a central location). If the Agentic economy kicks off like many suspect, this stock may be one of the stars of the scene.

Want to see what justifies such a low fair value against Fastly's current price? The narrative leans heavily on specific revenue growth, profit margins and a future earnings multiple that together present a very different picture to today’s market pricing.

Result: Fair Value of $4.97 (OVERVALUED)

However, Fastly’s narrative could stall if revenue growth slows or losses persist, particularly if investor attention shifts away from AI and edge computing and toward other sectors.

Another View On Fastly's Valuation

That $4.97 fair value from the popular Fastly narrative sits in stark contrast to Simply Wall St's DCF work, which suggests Fastly is trading about 14.5% below an estimated future cash flow value of $24.24. One method flags extreme optimism; the other hints at a margin of safety. Which framework do you trust when the next headline lands?

Simply Wall St performs a discounted cash flow (DCF) on every stock in the world every day (check out Fastly for example). We show the entire calculation in full. You can track the result in your watchlist or portfolio and be alerted when this changes, or use our stock screener to discover 47 high quality undervalued stocks. If you save a screener we even alert you when new companies match - so you never miss a potential opportunity.

Next Steps

With sentiment on Fastly clearly split between concern and optimism, you may wish to use this period of heightened interest to review the underlying data and form your own judgment, starting with 2 key rewards and 3 important warning signs

Looking for more investment ideas beyond Fastly?

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This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.