Inertia Enterprises logo

Inertia Enterprises

Emerging

Raised $450M Series A (Feb 2026) — largest fusion Series A ever — led by Bessemer and GV. Founded by Twilio co-founder Jeff Lawson and NIF lead scientist Annie Kritcher.

Best for: Inertial Confinement FusionEmerging, rapid growth
38
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Climate & EnergyInertial Confinement FusionWebsiteUpdated April 2026

Brand Intelligence Graph

Capabilities
Inertial Confinement Fusion

Company Overview

About Inertia Enterprises

Inertia Enterprises is a fusion energy company founded by Twilio co-founder Jeff Lawson and Annie Kritcher, the National Ignition Facility lead scientist who oversaw the 2022 fusion ignition breakthrough — the first controlled fusion reaction to achieve scientific net energy gain. The company raised $450 million in Series A financing in February 2026 led by Bessemer Venture Partners and Alphabet's GV, the largest fusion Series A on record.

Business Model & Competitive Advantage

Inertia's technical approach is inertial confinement fusion (ICF), building directly on top of the NIF's proven ignition science. Kritcher's presence gives the company unmatched scientific credibility — she led the team that produced the world's first self-sustaining fusion reaction, and Inertia is now working to translate that laboratory proof-of-concept into a commercial power plant architecture. The company is developing the "Thunderwall" laser beamline targeting a 2030 pilot plant.

Competitive Landscape 2025–2026

The founding team's combination of deep fusion physics (Kritcher) and hyper-growth company building (Lawson, who scaled Twilio from zero to $1B ARR) is unusual in the fusion sector, which has historically been strong on science and weak on commercial execution. The $450 million Series A provides the runway to build the Thunderwall pilot without the funding gaps that have hampered earlier fusion programs.

Curated content • Fact-checked and verified

Key Differentiators

Emerging Innovator

Inertia Enterprises is an emerging player bringing innovative solutions to the Climate Tech market.

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