# Flox funding: rounds and investors > Flox has raised $29M across 3 rounds since 2021. Investors include Addition, Y Combinator and New Enterprise Associates. Every round with its source. Source: https://millionrounds.com/company/flox (Millionrounds; every figure on the page links to its filing or article) United States · [Series B startup](https://millionrounds.com/companies) # Who invested in *Flox* 3 rounds we have observed, with the 9 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. Consumer Apps Construction Developer Tools Open Source Follow Flox and see its new rounds in your feed. [Start following](https://millionrounds.com/login?join=1&why=follow&next=%2Fcompany%2Fflox) Funding summary Updated 5 Nov 2026 **$29M** raised across 3 rounds since 2021, from 3 sources **$1.2M** Seed **$3.0M** Venture **$25M** Series B - **Latest round:** Series B, $25M Sept 2025 - **Led by:** Addition - **Step-up i:** 8.3× - **Investors:** 9 (1 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. 2022 2023 2024 2025 **$1.2M** Seed **$3.0M** Venture **$25M** Series B - **First round:** Seed, $1.2M - **Biggest round:** $25M - **Usual gap between rounds:** 2.9 years ## The rounds - **Sept 2025** Series B **$25M** *6 new* [Addition](https://millionrounds.com/fund/addition) Lead [New Enterprise Associates](https://millionrounds.com/fund/new-enterprise-associates) [Luminate](https://millionrounds.com/fund/luminate-accelerator) [Illuminate Financial Management](https://millionrounds.com/fund/illuminate-financial) [D. E. Shaw & Co.](https://millionrounds.com/fund/d-e-shaw-and-co) Hetz Ventures Reported by TechStartups - **Sept 2024** Venture **$3.0M** *2 new* [Creative Destruction Lab](https://millionrounds.com/fund/creative-destruction-lab) [43North](https://millionrounds.com/fund/43north) Source recorded SEC filing: $3.0M sold, first sale Sept 2024 - **Oct 2021** Seed **$1.2M** *1 new* [Y Combinator](https://millionrounds.com/fund/y-combinator) Source recorded ## Founders and team From Flox's own website: 2 on the team. - **Ron Efroni** CEO - **Michael Brantley** CTO ## 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. **Seed** 2021 **Venture** 2024 **Series B** 2025 [Addition](https://millionrounds.com/fund/addition) L [Y Combinator](https://millionrounds.com/fund/y-combinator) [New Enterprise Associates](https://millionrounds.com/fund/new-enterprise-associates) [Creative Destruction Lab](https://millionrounds.com/fund/creative-destruction-lab) [Luminate](https://millionrounds.com/fund/luminate-accelerator) [Illuminate Financial Management](https://millionrounds.com/fund/illuminate-financial) [43North](https://millionrounds.com/fund/43north) [D. E. Shaw & Co.](https://millionrounds.com/fund/d-e-shaw-and-co) Hetz Ventures ## Everyone who backed them [Addition](https://millionrounds.com/fund/addition) Private equity **1** round, led 1 [Y Combinator](https://millionrounds.com/fund/y-combinator) Accelerator **1** round [New Enterprise Associates](https://millionrounds.com/fund/new-enterprise-associates) VC firm **1** round [Creative Destruction Lab](https://millionrounds.com/fund/creative-destruction-lab) Accelerator **1** round [Luminate](https://millionrounds.com/fund/luminate-accelerator) Accelerator **1** round [Illuminate Financial Management](https://millionrounds.com/fund/illuminate-financial) VC firm **1** round [43North](https://millionrounds.com/fund/43north) Accelerator **1** round [D. E. Shaw & Co.](https://millionrounds.com/fund/d-e-shaw-and-co) Asset manager **1** round Hetz Ventures no record of our own yet **1** round Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=flox). ## Also claim to have backed them These 3 firms list Flox 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. [Lever VC](https://millionrounds.com/fund/lever-vc) VC firm Per its own site [Angel Collective](https://millionrounds.com/fund/angel-collective) Fund of funds Per its own site [Post Urban](https://millionrounds.com/fund/post-urban) Venture studio Per its own site ## Quick answers about Flox ### Who invested in Flox? Flox's investors include Addition, Y Combinator, New Enterprise Associates, Creative Destruction Lab and Luminate, and 4 more on record. Addition led its latest round. ### How much has Flox raised? Flox has raised $29M across 3 rounds since 2021. ### When did Flox last raise? Flox's most recent round was a Series B of $25M in Sept 2025, led by Addition. ### What was Flox's biggest round? Its most recent round, $25M in Sept 2025, is also its largest on record. ### Who backed Flox first? Flox's first round on record, in Oct 2021, was backed by Y Combinator. ### What stage is Flox at? Flox's latest named round is a Series B, in Sept 2025. ### Where is Flox based? Flox is based in the United States. ### Who led Flox's rounds? Addition led the Series B in 2025. ## Companies like Flox In the same sector, and raised in the last eighteen months. [**Trajectory** $101M · Nov 2026](https://millionrounds.com/company/trajectory)[**e2e** $8.0M · Nov 2026](https://millionrounds.com/company/e2e)[**Guava** $13M · Nov 2026](https://millionrounds.com/company/guava)[**Fal** $1.4B · Nov 2026](https://millionrounds.com/company/fal)[**Pathfinder** $13M · Nov 2026](https://millionrounds.com/company/pathfinder)[**Northwood Space** $505M · Nov 2026](https://millionrounds.com/company/northwood-space) ## 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