Founders / Sarah Ruest
Sarah Ruest
Sarah Ruest is the co-founder and CTO of Haloo (Heirlume), a legal AI company based in Hamilton. Sarah Ruest co-founded Haloo (Heirlume) with Julie MacDonell. Haloo (Heirlume) had raised C$5.8M across 2 rounds as of November 2026, most recently a C$1M grant in December 2025 from FedDev Ontario.
Co-founder & CTO of Haloo (Heirlume).
Haloo (Heirlume)
AI-powered trademark search and protection platform.
- Role
- Co-founder & CTO
- HQ
- Hamilton, ON
- Status
- Active
- Disclosed raised
- C$5.8M
- Latest round
- Grant, Dec 17, 2025
- Website
- haloo.ai
Co-founders: Julie MacDonell
Investors: FedDev Ontario, Innospark Ventures, BDC Thrive Venture Fund, LOI Venture, W Fund, Mistral Venture Partners
Founders are listed as named in primary coverage of their companies. Profile links are matched to the company before they are published. To correct this page or ask for it to be removed, email the Index.
Data as of November 10, 2026.