# Optera funding: rounds and investors > Optera has raised $16M across 2 rounds since 2023. Investors include Empirical Ventures, UKI2S and AngelList. Every round with its source. Source: https://millionrounds.com/company/optera (Millionrounds; every figure on the page links to its filing or article) United States · [Seed startup](https://millionrounds.com/companies) # 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 summary Updated 26 Oct 2026 **$16M** raised across 2 rounds since 2023, from 4 sources **$12M** Series A **$4.0M** Seed - **Latest round:** Seed, $4.0M Jun 2026 - **Led by:** Empirical Ventures and UKI2S - **Biggest round:** $12M Series 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. 2024 2025 2026 **$12M** Series A **$4.0M** Seed - **First round:** Series A, $12M - **Biggest round:** $12M - **Between rounds:** 2.8 years ## The rounds - **Jun 2026** Seed **$4.0M** *5 new* [Empirical Ventures](https://millionrounds.com/fund/empirical-ventures) Lead [UKI2S](https://millionrounds.com/fund/uki2s) Lead [Foresight Group](https://millionrounds.com/fund/foresight-group) [Blackfinch Ventures](https://millionrounds.com/fund/blackfinch-ventures) [National Security Strategic Investment Fund (NSSIF)](https://millionrounds.com/fund/national-security-strategic-investment-fund-nssif) Reported by Firms' own news pages and 2 others - **Sept 2023** Series A **$12M** *5 new* [AngelList](https://millionrounds.com/fund/angellist) [SaaS Ventures](https://millionrounds.com/fund/saas) [Matchstick Ventures](https://millionrounds.com/fund/matchstick-ventures) [Blackhorn Ventures](https://millionrounds.com/fund/blackhorn-ventures) [Next Frontier Capital](https://millionrounds.com/fund/next-frontier-capital) Source recorded ## Founders and team From the SEC filings it signed: 1 on the team. - **Tim Weiss** Executive Officer i ## 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 A** 2023 **Seed** 2026 [Empirical Ventures](https://millionrounds.com/fund/empirical-ventures) L [UKI2S](https://millionrounds.com/fund/uki2s) L [AngelList](https://millionrounds.com/fund/angellist) [Foresight Group](https://millionrounds.com/fund/foresight-group) [SaaS Ventures](https://millionrounds.com/fund/saas) [Matchstick Ventures](https://millionrounds.com/fund/matchstick-ventures) [Blackhorn Ventures](https://millionrounds.com/fund/blackhorn-ventures) [Next Frontier Capital](https://millionrounds.com/fund/next-frontier-capital) [Blackfinch Ventures](https://millionrounds.com/fund/blackfinch-ventures) [National Security Strategic Investment Fund (NSSIF)](https://millionrounds.com/fund/national-security-strategic-investment-fund-nssif) ## Everyone who backed them [Empirical Ventures](https://millionrounds.com/fund/empirical-ventures) VC firm **1** round, led 1 [UKI2S](https://millionrounds.com/fund/uki2s) VC firm **1** round, led 1 [AngelList](https://millionrounds.com/fund/angellist) Angel network **1** round [Foresight Group](https://millionrounds.com/fund/foresight-group) Private equity **1** round [SaaS Ventures](https://millionrounds.com/fund/saas) VC firm **1** round [Matchstick Ventures](https://millionrounds.com/fund/matchstick-ventures) VC firm **1** round [Blackhorn Ventures](https://millionrounds.com/fund/blackhorn-ventures) VC firm **1** round [Next Frontier Capital](https://millionrounds.com/fund/next-frontier-capital) VC firm **1** round [Blackfinch Ventures](https://millionrounds.com/fund/blackfinch-ventures) VC firm **1** round [National Security Strategic Investment Fund (NSSIF)](https://millionrounds.com/fund/national-security-strategic-investment-fund-nssif) Corporate VC **1** round Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=optera). ## 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. ### How much has Optera raised? Optera has raised $16M across 2 rounds since 2023. ### When did Optera last raise? Optera's most recent round was a Seed of $4.0M in Jun 2026, led by Empirical Ventures. ### What was Optera's biggest round? Optera's largest round on record is $12M (Series A), in Sept 2023. ### Who backed Optera first? Optera's first round on record, in Sept 2023, was backed by AngelList, SaaS Ventures and Matchstick Ventures and 2 others. ### What stage is Optera at? Optera's latest named round is a Seed, in Jun 2026. ### Where is Optera based? Optera is based in the United States. ### Who led Optera's rounds? Empirical Ventures led the Seed in 2026. ## Companies like Optera In the same sector, and raised in the last eighteen months. [**Amogy** $125M · Oct 2026](https://millionrounds.com/company/amogy)[**LanzaJet** $67M · Oct 2026](https://millionrounds.com/company/lanzajet)[**Pivot Energy** $500M · Oct 2026](https://millionrounds.com/company/pivot-energy)[**Peak Energy** $163M · Oct 2026](https://millionrounds.com/company/peak-energy)[**Renew** $207M · Oct 2026](https://millionrounds.com/company/renew)[**Optivolt** $37M · Oct 2026](https://millionrounds.com/company/optivolt) ## Find investors like these Search every investor by what they have actually funded, then narrow to your stage and market. Free. Open the investor searchOr these rounds in the app