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Evidence-bound summary — expand sections for movement, risks, and signals.
Memo snapshot · May 20, 2026, 6:12 PM
What would change this read
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TL;DR
Seed (YC)Zephyr Fusion
Raised $500K across 1 funding round. Latest: $500K Pre-seed (Sep 2025). Investors: Y Combinator. (High).
Funding
Raised $500K across 1 funding round. Latest: $500K Pre-seed (Sep 2025). Investors: Y Combinator. (High).
Product / news
1 product/news‑styled row(s); headline risk without filings (High).
Verified facts
Fall 2025 batch; in-orbit megawatt-class fusion power for space industry.
Weak funding evidence: mention does not include a parsed raise amount/round and may refer to non-funding context.
No open roles indexed yet.
The index price and activity score are algorithmic estimates based on observed public company-level signals. They may be incomplete, stale, or inaccurate and are not investment, legal, tax, or business advice.
Source types found
Strongest / recent news-style rows
Wed, May 20, 06:12 PM · confidence 88%high quality
Wed, May 20, 06:12 PM · confidence 85%medium quality
Newest first · 4 event(s)
Source: Homepage
Fusion power for tomorrow's industrial revolution in space
Fall 2025 batch; in-orbit megawatt-class fusion power for space industry.
Megawatt-class in-orbit fusion power; backed by YC.
Founders with 35+ years combined fusion research experience.
2 row(s)
The company's own site — the authoritative description of what they sell and to whom. Marketing-controlled, so treat claims as positioning rather than verified traction.
Fusion power for tomorrow's industrial revolution in space
Why it matters: Primary source — the company's own positioning; best read for what they sell and to whom, not for traction claims.
Open source ↗Megawatt-class in-orbit fusion power; backed by YC.
Why it matters: Primary source — the company's own positioning; best read for what they sell and to whom, not for traction claims.
Open source ↗1 row(s)
Third-party press coverage. Independent reporting corroborates company claims; repeated coverage across outlets is a momentum signal.
Founders with 35+ years combined fusion research experience.
Why it matters: Independent coverage — third-party corroboration of company claims; recurring coverage indicates rising visibility.
Open source ↗1 row(s)
Funding announcements and investor-database records. The strongest public signal of capitalization: round, amount, and syndicate quality when disclosed.
Fall 2025 batch; in-orbit megawatt-class fusion power for space industry.
Why it matters: Funding signal — Pre-Seed per this source; verify against the linked original before relying on it.
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