SirenOpt
SirenOpt is an aerospace company in San Leandro, United States, founded in 2022. It has raised $15.5M across 3 rounds, most recently a $6.5M Venture Round in October 2025.
- Headquarters
- San Leandro, California
- Employees
- 11–50
- Founded
- 2022
- Website
- sirenopt.com
- Total Funding
- $15.5M
- Last Round
- $6.5M Venture RoundOct 2025
- Rounds
- 3
Totals include recorded grants and other qualifying funding, not just equity. What counts toward funding.
Indexed holds 3 funding rounds and 9 investors for this company. The full record is or through the API.
About
SirenOpt develops advanced materials characterization using cold atmospheric plasma, machine learning and predictive analytics. Its approach creates material fingerprints in real time and supports research and development as well as process optimization. The technology combines plasma-based characterization with predictive analysis to help characterize advanced materials.
Summary
It lists 11–50 employees. It has raised $15.5M in total across 3 rounds, most recently a $6.5M Venture Round in Oct 2025. Investors include Voyager Ventures, Hitachi Ventures and InMotion Ventures.
Funding History
Oct 2025
Sign up to see all 3 events
Funding: Seed through Venture Round. Amounts, valuations, and investors where available.
Investors
Similar Companies
Develops all-electric eVTOL aircraft and intends to operate urban air taxi services, serving comm...
Relativity Space designs and builds reusable rockets to make access to space more reliable and ro...
Develops and manufactures silicon-based anode materials and battery engineering services for EVs,...
Northvolt is a European battery manufacturer on a mission to deliver sustainable lithium-ion batt...
Appears in
Your company? Embed this profile
Add the live badge to your site — it stays current as your funding data updates.
<a href="https://indexed.vc/companies/sirenopt"><img src="https://indexed.vc/api/badge/company/sirenopt" alt="SirenOpt on Indexed.vc" width="260" height="76" /></a>