# Opal Security funding: rounds and investors > Opal Security has raised $45M across 2 rounds since 2023. Investors include Greylock, Battery Ventures and BoxGroup. Every round with its source. Source: https://millionrounds.com/company/opal-security (Millionrounds; every figure on the page links to its filing or article) United States · [Series B startup](https://millionrounds.com/companies) # Who invested in *Opal Security* 2 rounds we have observed, with the 4 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. AI Cybersecurity Raised 5 months ago Follow Opal Security and see its new rounds in your feed. [Start following](https://millionrounds.com/login?join=1&why=follow&next=%2Fcompany%2Fopal-security) Funding summary Updated 15 Nov 2026 **$45M** raised across 2 rounds since 2023, from 2 sources **$22M** Series B **$23M** Round - **Latest round:** Round, $23M Jul 2026 - **Led by:** Greylock and Battery Ventures - **Investors:** 4 (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 **$22M** Series B **$23M** Round - **First round:** Series B, $22M - **Biggest round:** $23M - **Between rounds:** 2.6 years ## The rounds - **Jul 2026** Round **$23M** *1 new* *3 returning* [Greylock](https://millionrounds.com/fund/greylock-partners) Lead [Battery Ventures](https://millionrounds.com/fund/battery-ventures) Lead [BoxGroup](https://millionrounds.com/fund/boxgroup) [Cambium Capital](https://millionrounds.com/fund/cambium-capital) Reported by Ventureburn - **Dec 2023** Series B **$22M** *3 new* [BoxGroup](https://millionrounds.com/fund/boxgroup) [Greylock](https://millionrounds.com/fund/greylock-partners) [Battery Ventures](https://millionrounds.com/fund/battery-ventures) Source recorded ## 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 B** 2023 **Round** 2026 [Greylock](https://millionrounds.com/fund/greylock-partners) L [Battery Ventures](https://millionrounds.com/fund/battery-ventures) L [BoxGroup](https://millionrounds.com/fund/boxgroup) [Cambium Capital](https://millionrounds.com/fund/cambium-capital) ## Everyone who backed them [Greylock](https://millionrounds.com/fund/greylock-partners) VC firm **2** rounds, led 1 [Battery Ventures](https://millionrounds.com/fund/battery-ventures) VC firm **2** rounds, led 1 [BoxGroup](https://millionrounds.com/fund/boxgroup) VC firm **2** rounds [Cambium Capital](https://millionrounds.com/fund/cambium-capital) VC firm **1** round Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=opal-security). ## Also claim to have backed them This firm lists Opal Security as a portfolio company on their own website, but no report of a round names it. They are the firms' own claims, kept apart from the rounds above. [Cambium Capital Management](https://millionrounds.com/fund/cambium-capital-management) VC firm Per its own site ## Quick answers about Opal Security ### Who invested in Opal Security? Opal Security's investors include Greylock, Battery Ventures, BoxGroup and Cambium Capital. Greylock led its latest round. ### How much has Opal Security raised? Opal Security has raised $45M across 2 rounds since 2023. ### When did Opal Security last raise? Opal Security's most recent round, $23M, was in Jul 2026, led by Greylock. ### What was Opal Security's biggest round? Its most recent round, $23M in Jul 2026, is also its largest on record. ### Who backed Opal Security first? Opal Security's first round on record, in Dec 2023, was backed by BoxGroup, Greylock and Battery Ventures. ### What stage is Opal Security at? Opal Security's latest named round is a Series B, in Dec 2023. ### Where is Opal Security based? Opal Security is based in the United States. ### Who led Opal Security's rounds? Greylock led the funding round in 2026. ## Companies like Opal Security In the same sector, and raised in the last eighteen months. [**LangChain** $425M · Nov 2026](https://millionrounds.com/company/langchain)[**VuMedi** $142M · Nov 2026](https://millionrounds.com/company/vumedi)[**Betterness** $3.5M · Nov 2026](https://millionrounds.com/company/betterness)[**Axle** $12M · Nov 2026](https://millionrounds.com/company/axle)[**CrunchAtlas** $250K · Nov 2026](https://millionrounds.com/company/crunchatlas)[**Zus Health** $73M · Nov 2026](https://millionrounds.com/company/zus-health) ## 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