# Atomic funding: rounds and investors > Atomic has raised $55M across 5 rounds since 2025. Investors include Y Combinator, QED Investors and Samsung Next. Every round with its source. Source: https://millionrounds.com/company/atomic (Millionrounds; every figure on the page links to its filing or article) United States · [Series A startup](https://millionrounds.com/companies) # Who invested in *Atomic* 5 rounds we have observed, with the 19 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 Big Data & Analytics Logistics Software Raised 1 month ago Y Combinator: S20 Funding summary Updated 26 Oct 2026 **$55M** raised across 5 rounds since 2025, from 6 sources **$2.5M** Venture **$10M** Venture **$30M** Venture **$13M** Series A - **Latest round:** Series A, $13M Sept 2026 - **Led by:** Madrona Venture Group and Klass Capital - **Biggest round:** $30M Venture · Aug 2025 - **Investors:** 19 (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. 2026 **$2.5M** Venture **$10M** Venture **$30M** Venture **?** Venture **$13M** Series A - **First round:** Venture, $2.5M - **Biggest round:** $30M - **Usual gap between rounds:** 4 months ## The rounds - **Sept 2026** Series A **$13M** *5 new* [Madrona Venture Group](https://millionrounds.com/fund/madrona) Lead [Klass Capital](https://millionrounds.com/fund/klass-capital) Lead [Alumni Ventures](https://millionrounds.com/fund/us-strategic-tech-fund-an-alumni-ventures-fund) [Sandberg Bernthal Venture Partners](https://millionrounds.com/fund/sandberg-bernthal-venture-partners) [DVx Ventures](https://millionrounds.com/fund/dvx-ventures) Reported by Tech Funding News - **Oct 2025** Venture **Amount undisclosed** *4 returning* [Y Combinator](https://millionrounds.com/fund/y-combinator) [QED Investors](https://millionrounds.com/fund/qed-investors) [Samsung Next](https://millionrounds.com/fund/samsung-next) [Anthemis](https://millionrounds.com/fund/anthemis-group) Source recorded SEC filing: $600K sold, first sale Apr 2025 - **Aug 2025** Venture **$30M** *10 new* [Y Combinator](https://millionrounds.com/fund/y-combinator) [Khosla Ventures](https://millionrounds.com/fund/khosla-ventures) [Battery Ventures](https://millionrounds.com/fund/battery-ventures) [Peak XV](https://millionrounds.com/fund/peak-xv) [QED Investors](https://millionrounds.com/fund/qed-investors) [Samsung Next](https://millionrounds.com/fund/samsung-next) [Blume Ventures](https://millionrounds.com/fund/blume-ventures) [Anthemis](https://millionrounds.com/fund/anthemis-group) [Matrix Partners India](https://millionrounds.com/fund/matrix-partners-india) [Peak](https://millionrounds.com/fund/peak) Source recorded and 1 other SEC filing: $600K sold, first sale Apr 2025 - **Apr 2025** Venture **$2.5M** *1 new* [K1W1](https://millionrounds.com/fund/k1w1) Source recorded SEC filing: $600K sold, first sale Apr 2025 - **Apr 2025** Venture **$10M** *3 new* [Greylock](https://millionrounds.com/fund/greylock-partners) [Portage Ventures](https://millionrounds.com/fund/portage-vc) [ATX Venture Partners](https://millionrounds.com/fund/atx-venture-partners) Source recorded SEC filing: $600K sold, first sale Apr 2025 ## 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. **Venture** 2025 **Venture** 2025 **Venture** 2025 **Venture** 2025 **Series A** 2026 [Y Combinator](https://millionrounds.com/fund/y-combinator) [QED Investors](https://millionrounds.com/fund/qed-investors) [Samsung Next](https://millionrounds.com/fund/samsung-next) [Anthemis](https://millionrounds.com/fund/anthemis-group) [Madrona Venture Group](https://millionrounds.com/fund/madrona) L [Klass Capital](https://millionrounds.com/fund/klass-capital) L [Alumni Ventures](https://millionrounds.com/fund/us-strategic-tech-fund-an-alumni-ventures-fund) [Khosla Ventures](https://millionrounds.com/fund/khosla-ventures) [Greylock](https://millionrounds.com/fund/greylock-partners) [Battery Ventures](https://millionrounds.com/fund/battery-ventures) ## Everyone who backed them [Y Combinator](https://millionrounds.com/fund/y-combinator) Accelerator **2** rounds [QED Investors](https://millionrounds.com/fund/qed-investors) VC firm **2** rounds [Samsung Next](https://millionrounds.com/fund/samsung-next) Corporate VC **2** rounds [Anthemis](https://millionrounds.com/fund/anthemis-group) VC firm **2** rounds [Madrona Venture Group](https://millionrounds.com/fund/madrona) VC firm **1** round, led 1 [Klass Capital](https://millionrounds.com/fund/klass-capital) VC firm **1** round, led 1 [Alumni Ventures](https://millionrounds.com/fund/us-strategic-tech-fund-an-alumni-ventures-fund) VC firm **1** round [Khosla Ventures](https://millionrounds.com/fund/khosla-ventures) VC firm **1** round [Greylock](https://millionrounds.com/fund/greylock-partners) VC firm **1** round [Battery Ventures](https://millionrounds.com/fund/battery-ventures) VC firm **1** round [Peak XV](https://millionrounds.com/fund/peak-xv) VC firm **1** round [Blume Ventures](https://millionrounds.com/fund/blume-ventures) VC firm **1** round [Matrix Partners India](https://millionrounds.com/fund/matrix-partners-india) VC firm **1** round [Portage Ventures](https://millionrounds.com/fund/portage-vc) VC firm **1** round [K1W1](https://millionrounds.com/fund/k1w1) Investment firm **1** round [ATX Venture Partners](https://millionrounds.com/fund/atx-venture-partners) VC firm **1** round [Peak](https://millionrounds.com/fund/peak) VC firm **1** round [Sandberg Bernthal Venture Partners](https://millionrounds.com/fund/sandberg-bernthal-venture-partners) VC firm **1** round [DVx Ventures](https://millionrounds.com/fund/dvx-ventures) VC firm **1** round Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=atomic). ## Quick answers about Atomic ### Who invested in Atomic? Atomic's investors include Y Combinator, QED Investors, Samsung Next, Anthemis and Madrona Venture Group, and 14 more on record. Madrona Venture Group led its latest round. ### How much has Atomic raised? Atomic has raised $55M across 5 rounds since 2025. One round did not disclose an amount, so the total is a floor. ### When did Atomic last raise? Atomic's most recent round was a Series A of $13M in Sept 2026, led by Madrona Venture Group. ### What was Atomic's biggest round? Atomic's largest round on record is $30M (Venture), in Aug 2025. ### Who backed Atomic first? Atomic's first round on record, in Apr 2025, was backed by K1W1. ### What stage is Atomic at? Atomic's latest named round is a Series A, in Sept 2026. ### Where is Atomic based? Atomic is based in the United States. ### Who led Atomic's rounds? Madrona Venture Group led the Series A in 2026. ## Companies like Atomic In the same sector, and raised in the last eighteen months. [**Amogy** $125M · Oct 2026](https://millionrounds.com/company/amogy)[**SpaceX** $42B · Oct 2026](https://millionrounds.com/company/spacex)[**xPay** $1.5M · Oct 2026](https://millionrounds.com/company/xpay)[**STRIVE** $1.3B · Oct 2026](https://millionrounds.com/company/strive)[**FORT Robotics** $39M · Oct 2026](https://millionrounds.com/company/fort-robotics)[**Albert Invent** $20M · Oct 2026](https://millionrounds.com/company/albert-invent) ## 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