Halcyon(US)
United States
- San Francisco, CA
- 17/03/2026
- Series A
- $21,000,000
We use AI to make energy information easy to find and analyze
- Industry Software Development
- Website https://halcyon.io/
- LinkedIn https://www.linkedin.com/company/halcyon-io/
Related People
Nat BullardCo Founder
Singapore -
Singapore
I have two decades' experience in energy systems and building information systems and platforms.
I am a company founder, advisor, strategy facilitator, and keynote speaker on decarbonization technology, policy, markets, and strategy. I am co-founder of Halcyon, an AI-assisted search and information platform that helps those navigating the energy transition and decarbonization. I am also a member of the advisory boards of Arcadia and Ember.
I spent 15 years with BloombergNEF, joining prior to New Energy Finance's acquisition by Bloomberg in 2009. There, I covered US markets, solar, and global executive strategy, concluding my time as the group's Chief Content Officer. While at BloombergNEF I began my weekly writing as well, which later moved to Bloomberg Opinion and then, Bloomberg Green. I wrote that column for nearly a decade, reaching nearly 300,000 subscribers.
I am based in Singapore. The full timeline: Decatur (Georgia), Cambridge (Massachusetts), Cairo, New York City, Bologna, Washington DC, San Francisco, Hong Kong, Washington DC (again), Singapore.
Dark Watch | $3,500,000 | (Mar 17, 2026)
Alomana | $4,597,680 | (Mar 17, 2026)
Gangkhar | $4,250,000 | (Mar 17, 2026)
Malama Health | $9,200,000 | (Mar 17, 2026)
Understood Care | $5,000,000 | (Mar 17, 2026)
AgZen | $10,000,000 | (Mar 17, 2026)
Certiv | $4,200,000 | (Mar 17, 2026)
Scanner | $22,000,000 | (Mar 17, 2026)
Zero RFI | $13,800,000 | (Mar 17, 2026)
Nadia Care | $12,000,000 | (Mar 17, 2026)