Five9 Inc vs MasTec Inc — how do they compare? Five9 Inc trades at $32.65 (market cap $2.44B), while MasTec Inc trades at $280.16 (market cap $21.90B). The key difference: MasTec Inc is far larger — about 9× Five9 Inc's market cap, and Five9 Inc is trading nearer its 52-week high, MasTec Inc nearer its low. Which is the better fit depends on your goals.
| FIVN | MTZ | |
|---|---|---|
Market Cap | $2.44B | $21.90B |
Sector | Technology | Technology |
52-Week High | $34.48 | $437.51 |
52-Week Low | $13.61 | $172.51 |
Enterprise Value | $2.59B | $24.81B |
Signals from Pluang's Aura AI — not financial advice
Five9 (FIVN) trades at $31.14, down 9.69% today but remains near its 52-week highs. The stock shows strong technical momentum with bullish moving averages and has consistently beaten earnings estimates in recent quarters. Revenue growth accelerated to 10% in Q2 2026, reaching $312.4 million, while the company maintains a solid gross margin of 54.91%. Recent management appointments and AI-driven subscription growth provide positive catalysts.
The outlook remains positive with 61% analyst buy ratings and a $32.67 consensus target offering 5% upside. However, elevated valuation multiples (P/E 47.99) and ongoing fiduciary investigations pose risks. The stock's trajectory depends on continued execution of AI revenue growth and margin expansion targets.
MTZ trades at $282.66, up 5.36% over 24 hours, with a bearish technical signal but strong fundamental momentum. The company reported record Q2 2026 revenue of $4.37 billion, up 23% year-over-year, and raised its full-year outlook, supported by a $21.4 billion backlog and recent acquisition of The Superior Group. Analyst consensus is overwhelmingly bullish with a $439.56 price target, though technical indicators show selling pressure near resistance at $283.
The outlook for MTZ is positive, driven by infrastructure demand and earnings beats, but risks include execution on large projects and debt from recent note issuance. The stock offers growth potential if it can sustain margin expansion and capitalize on its record backlog, though investors should monitor communications segment delays and interest expense impacts.
Trailing returns across standard periods
Five9 provides cloud-native contact center software that enables digital customer service, sales, and marketing engagement. The company's Virtual Contact Center platform combines core telephony functionality, omnichannel engagement capabilities, and various software modules into a unified cloud contact-center-as-a-service, or CCaaS, platform. Five9's artificial intelligence and automation portfolio supplements and enhances the firm's core CCaaS offerings, including solutions for digital self-service, agent assist technology, and workflow automation. Five9 also offers workforce optimization products that optimize call center efficiency through workforce management solutions, manage interaction quality, and track agent performance.
Read more on FIVN →MasTec, Inc. is a leading infrastructure construction company operating mainly in North America. The company's services cover a diverse range of end-markets, including communications (building fiber and wireless infrastructure), oil & gas, electric power (transmission, distribution, and clean energy), and industrial projects. MTZ provides critical engineering, procurement, and construction (EPC) services that support the expansion and maintenance of essential infrastructure across the continent.
Read more on MTZ →