Bloom Energy vs. Constellation Energy: Which Energy Stock Is an AI-Driven Buy in 2026?

In the race to power energy-intensive data centers, investors face a choice between hydrogen-ready fuel cells from Bloom Energy and nuclear power from Constellation Energy. Bloom Energy manufactures solid oxide fuel cell systems that generate electricity and hydrogen on-site, serving clients in the industrial sector, particularly data centers and semiconductor manufacturers.

In FY 2025, Bloom reported a revenue of $2 billion, a 37% increase from the previous year, but also reported a $88.4 million net loss. Its debt-to-equity ratio is 3.9x, while its free cash flow reached $57.2 million.

On the other hand, Constellation Energy operates a massive fleet of carbon-free nuclear plants, with a total capacity of approximately 55 gigawatts. It recently secured a 20-year agreement with Microsoft for a significant nuclear reactor restart and serves about 2.5 million customers, including three-fourths of the Fortune 100 and a large residential user base.

In FY 2025, Constellation's revenue reached $25.5 billion, growing by more than 8% from the prior year, and its net income was about $2.3 billion, translating to a net margin of 9%. Its debt-to-equity ratio is 0.6x, indicating a more conservative capital structure. Its free cash flow for the year was about $1.3 billion.

Bloom Energy's competitive landscape includes traditional utilities and other fuel cell manufacturers, facing potential political shifts impacting its long-term outlook and supply chain vulnerabilities. Constellation Energy, meanwhile, is exposed to fluctuations in commodity prices, competition from other providers, and the integration of large acquisitions while maintaining aging nuclear infrastructure. Regulatory oversight regarding its asset portfolio and cybersecurity threats also pose risks.

Looking ahead, Bloom Energy is expected to experience a 85% revenue growth to $4.1 billion in fiscal 2026 and net income of approximately $658 million. In contrast, Constellation Energy's valuation is lower relative to its sales and future earnings estimates. While AI data center demand is driving growth for Bloom, the massive electricity requirements of AI present opportunities for Constellation Energy, given its extensive nuclear infrastructure and other renewable energy assets.