Buy 3 Mid-Cap AI Internet Software Q3 Winners Set to Gain More in Q4

Fastly, Five9 and Workiva each returned more than 30% in Q3 2026, and the article recommends them as potential Q4 gainers based on favorable Zacks ranks and AI-related growth opportunities. Fastly’s management said AI-generated traffic is growing roughly 6.5 times faster than human traffic; earnings estimates have risen for Fastly and Workiva, while Five9’s estimates were unchanged over the stated periods. Workiva’s average broker price target implies 24.7% upside from its $71.88 last close, with targets ranging from $80 to $105.

Analysis

The key distinction is monetization quality, not AI exposure. Fastly may capture incremental security and compute demand, but faster traffic growth does not establish higher revenue per request or attractive incremental margins; capacity spending that outruns billable usage would reverse the operating-leverage thesis. Five9 faces a less one-way AI trade: automation can expand its addressable market, but successful virtual agents may reduce paid human-agent seats and weaken usage-based expansion. Flat estimate revisions make the low multiple insufficient evidence of a near-term rerating. Workiva’s compliance workflows may be harder to displace than generic AI features, though the article offers no evidence that AI is accelerating customer adds or pricing.

After reported gains exceeding 30% in the quarter, the immediate risk is profit-taking and a higher bar for guidance. Over 1–3 months, focus on Fastly’s security/compute growth and gross-margin or capacity commentary; Five9’s AI bookings, customer adoption, and seat/usage trends; and Workiva’s retention, growth, and guidance. Over 6–18 months, Fastly’s economics hinge on converting machine traffic into paid services, while Five9 must show automation revenue can offset seat pressure. Cloudflare and Akamai are relevant competitive checks for edge/security pricing; NICE and Genesys for contact-center competition. Treat management AI claims and broker targets as hypotheses, not proof. A broad AI-software multiple contraction or weaker enterprise spending could overwhelm company-specific execution.

Key Decisions for Investors

• Do not chase the quarter’s momentum. Put Fastly on a pullback watchlist; establish a position only if security/compute growth converts into billable demand without deterioration in margin or capacity economics. Falsify the thesis on weaker segment demand or evidence that capacity is growing faster than monetization.
• Keep Five9 as a valuation-watch, not an automatic long: require evidence that AI adoption lifts bookings or recurring revenue while customer-agent seat trends remain stable. Reassess if guidance or estimates weaken, or if automation adoption appears to cannibalize the legacy seat base.
• Prefer Workiva on execution confirmation rather than the broker-target upside: verify retention, organic growth, and forward guidance at the next results. Failure to sustain growth would undermine the estimate-revision case; no trade is warranted solely on target prices.
• For the next 1–3 months, monitor enterprise software spending and competitor pricing (Cloudflare/Akamai in edge services; NICE/Genesys in contact centers). A deterioration in those checks or broad multiple compression would argue against adding to any of the three.