Saisei Ventures is a venture capital firm. Based in Cambridge, Massachusetts, United States. The known portfolio counts 6 companies, including CureApp, Kenai Therapeutics, Craif, Tune Therapeutics, Optieum Biotechnologies and United Immunity.
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Investment focus
- Sector
- AIHealthcare
Contacts
Who to pitch at Saisei Ventures
Saisei Ventures portfolio companies (6)
- CureApp
- Kenai Therapeutics
- Craif
- Tune Therapeutics
- Optieum Biotechnologies
- United Immunity
Co-investors
Funds that share portfolio companies with Saisei Ventures.
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About Saisei Ventures
The firm's listing covers sectors AI and Healthcare, and focus areas Biotech, Digital Health, Drug Discovery and Regenerative Medicine; known deals cluster at Growth, Seed and Series A.
The contacts to approach at Saisei Ventures are Jonathan Yeh (Managing Partner), Hikaru Saito (Partner) and Sonny Dhawan (Associate).
Saisei Ventures shares portfolio companies with 5 other investment firms, among them California Institute for Regenerative Medicine, UTEC - The University of Tokyo Edge Capital Partners and Cure Ventures.
Frequently asked questions
What is Saisei Ventures?
Saisei Ventures is a venture capital firm based in Cambridge, Massachusetts, United States, with a known portfolio of 6 companies. The portfolio comes from public investment records rather than from the firm, so deals that never surfaced publicly are not in it.
What does Saisei Ventures invest in?
Listed sectors include AI and Healthcare; listed focus areas include Biotech, Digital Health, Drug Discovery and Regenerative Medicine. Those tags come from the portfolio attached to the firm, so they describe what has been backed rather than a stated mandate for what comes next.
What stage does Saisei Ventures invest at?
The known deals of Saisei Ventures include Growth, Seed and Series A rounds. Check that against your own round before reaching out: stage mismatch is the most common reason a well matched sector still goes nowhere.
Who should I pitch at Saisei Ventures?
All 3 people on file at Saisei Ventures are listed as contacts for the firm, each with their own profile page.
How do I contact Saisei Ventures?
Any email address on file for the firm is masked on this page and readable inside RaiseHunt after you create an account. The 3 people attached to the firm have their own pages, each showing whether an address is on file for them.
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Data: RaiseHunt investor dataset · Snapshot 5 September 2026 · How this data is built · Report a correction or request removal