United States · 
Who invested in Ostro?
Ostro's investors include Founders Fund, Susa Ventures, Bling Capital and Caffeinated Capital.
United States · Venture startup
Who invested in Ostro
Funding summaryUpdated 26 Oct 2026
Undisclosedraised across 1 round since 2025, from 1 source
- Latest round
- VentureApr 2025
- Investors
- 4
The rounds
- Apr 2025
Founders and team
From Ostro's own website: 1 on the team.
- Eliah PerezManager, Nurse Navigator Operations and Training
Everyone who backed them
Missing a round, or an investor who was in one? Tell us.
Also claim to have backed them
These 2 firms list Ostro as a portfolio company on their own websites, but no report of a round names them. They are the firms' own claims, kept apart from the rounds above.
Quick answers about Ostro
How much has Ostro raised?
Ostro has raised 1 round since 2025, none with a disclosed amount.
When did Ostro last raise?
Ostro's most recent round was a Venture in Apr 2025.
Who backed Ostro first?
Ostro's first round on record, in Apr 2025, was backed by Founders Fund, Susa Ventures and Bling Capital and 1 others.
What stage is Ostro at?
Ostro's latest named round is a Venture, in Apr 2025.
Where is Ostro based?
Ostro is based in the United States.
Companies like Ostro
In the same sector, and raised in the last eighteen months.
Find investors like these
Search every investor by what they have actually funded, then narrow to your stage and market. Free.