Who invested in Optera

2 rounds we have observed, with the 10 investors named in them. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.

Cleantech

Raised 5 months ago

Funding summaryUpdated 26 Oct 2026

$16Mraised across 2 rounds since 2023, from 4 sources

$12MSeries A$4.0MSeed

Latest round: Seed, $4.0MJun 2026
Led by: Empirical Ventures and UKI2S
Biggest round: $12MSeries A · Sept 2023
Investors: 10 (2 led)

See who backed them

The funding story

Each circle is a round, placed by date and sized by amount. The line above is the running total.

202420252026

$12MSeries A$4.0MSeed

First round: Series A, $12M
Biggest round: $12M
Between rounds: 2.8 years

The rounds

Jun 2026
Seed$4.0M5 new
Reported by Firms' own news pages and 2 others
Sept 2023
Series A$12M5 new
Source recorded

Founders and team

From the SEC filings it signed: 1 on the team.

Tim WeissExecutive Officeri

Who was in which round

The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.

Series A2023Seed2026

Empirical VenturesLUKI2SL

Next Frontier Capital

Blackfinch Ventures

National Security Strategic Investment Fund (NSSIF)

Everyone who backed them

Empirical VenturesVC firm1round, led 1

UKI2SVC firm1round, led 1

AngelListAngel network1round

Foresight GroupPrivate equity1round

SaaS VenturesVC firm1round

Matchstick VenturesVC firm1round

Blackhorn VenturesVC firm1round

Next Frontier CapitalVC firm1round

Blackfinch VenturesVC firm1round

National Security Strategic Investment Fund (NSSIF)Corporate VC1round

Missing a round, or an investor who was in one? Tell us.

Quick answers about Optera

Who invested in Optera?

Optera's investors include Empirical Ventures, UKI2S, AngelList, Foresight Group and SaaS Ventures, and 5 more on record. Empirical Ventures led its latest round.