Inertia
Founded 2024 · 65 employees on LinkedIn · 6 known investors
Inertia develops laser systems and fuel targets for inertial confinement fusion power generation. The company aims to commercialize fusion energy technology for grid-scale electricity production.
Investors · 6
Bessemer Venture PartnersRedwood City · $5M – $100M
Long Journey VenturesSan Francisco · $100K – $1M
Threshold VenturesPalo Alto · $500K – $20M
Uncork CapitalSan Francisco · $3M – $5M
GV (Google Ventures)reportedMountain View · $250K – $50M
Also in the syndicate · 1
Modern Capital
Funding
SEC filings, press & company announcements$900M disclosed across 2 of 3 rounds · 2026
- $450MSeries AJul 2026
Bessemer Venture Partners (lead), Google Ventures, Modern Capital
Source ↗ - $450MSeries AFeb 2026 · 3 sources
Bessemer Venture Partners (lead), GV (Google Ventures), Modern Capital, Threshold Ventures
Source ↗
Source: company announcements and press reports — follow each round's link for the claim.
Competitors · 2
by search overlap
Helion Energy37 shared keywordsHelion develops fusion energy systems designed to generate clean electricity for commercial use. The company builds pulsed magnetic fusion prototypes with applications for industrial and commercial electricity generation.
F22 shared keywordsFuse Energy develops fusion energy technology, with work spanning hardened electronics and radiation testing (HEART) and recycling of radioactive waste, aiming to provide an on-demand clean energy source. It brings together a team across engineering, fusion science, energy policy, and manufacturing.
Companies competing with Inertia for the same Google search keywords, organic and paid, via search-intersection analysis.
In the news
Holtec Files with SEC for IPO | Neutron Bytesneutronbytes.com · Jul 2026
Fusion roundup: Helion sets temperature record; Inertia raises $450M -- ANS / Nuclear Newswireans.org · Jul 2026Frequently asked questions
- What does Inertia do?
- Inertia develops laser systems and fuel targets for inertial confinement fusion power generation. The company aims to commercialize fusion energy technology for grid-scale electricity production.
- Who are Inertia's investors?
- Inertia's investors include Bessemer Venture Partners, Long Journey Ventures, Threshold Ventures, Uncork Capital, GV (Google Ventures).
- How much funding has Inertia raised?
- Inertia has disclosed $900M raised across 2 of its 3 known rounds.