# Tandem funding: rounds and investors > Tandem has raised $140M across 6 rounds since 2023. Investors include Accel, Antler and Goodwater Capital. Every round with its source. Source: https://millionrounds.com/company/tandem (Millionrounds; every figure on the page links to its filing or article) United States · [Series B startup](https://millionrounds.com/companies) # Who invested in *Tandem* 6 rounds we have observed, with the 14 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. Fintech Healthtech Sports Raised 9 months ago Y Combinator: S19 Follow Tandem and see its new rounds in your feed. [Start following](https://millionrounds.com/login?join=1&why=follow&next=%2Fcompany%2Ftandem) Funding summary Updated 5 Nov 2026 **$140M** raised across 6 rounds since 2023, from 6 sources **$25M** Venture **$100M** Series B - **Latest round:** Series B, $100M Jan 2026 - **Led by:** Accel - **Step-up i:** 20× - **Investors:** 14 (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. 2023 2024 2025 2026 **$5.0M** Seed **$25M** Venture **$3.7M** Seed **$1.1M** Crowdfunding **$5.0M** Pre-seed **$100M** Series B - **First round:** Seed, $5.0M - **Biggest round:** $100M - **Usual gap between rounds:** 6 months ## The rounds - **Jan 2026** Series B **$100M** *1 new* [Accel](https://millionrounds.com/fund/accel) Lead Reported by AlleyWatch SEC filing: $100K sold, first sale Mar 2026 - **May 2025** Pre-seed **$5.0M** *1 new* [Antler](https://millionrounds.com/fund/antler) Source recorded - **May 2024** Crowdfunding **$1.1M** No investor was named in the report. Source recorded - **Jan 2024** Seed **$3.7M** *5 new* [Goodwater Capital](https://millionrounds.com/fund/goodwater-capital) [Everywhere Ventures](https://millionrounds.com/fund/everywhere-ventures) [Corazon Capital](https://millionrounds.com/fund/corazon-capital) [Michigan Rise](https://millionrounds.com/fund/michigan-rise) [Groove Capital](https://millionrounds.com/fund/groove-capital) Source recorded - **Jul 2023** Venture **$25M** *5 new* [QED Investors](https://millionrounds.com/fund/qed-investors) [Headline](https://millionrounds.com/fund/headline) [Seedrs](https://millionrounds.com/fund/seedrs) [Ascension](https://millionrounds.com/fund/ascension) [Flourish Ventures](https://millionrounds.com/fund/flourish-ventures-2) Source recorded - **Feb 2023** Seed **$5.0M** *2 new* [Drive Capital](https://millionrounds.com/fund/drive-capital) [SBXi Fund](https://millionrounds.com/fund/sbxi) Source recorded ## Founders and team From Tandem's own website: 3 on the team. - **David Wagonfeld** Partner - **Doug Renert** Partner - **Sunil Bhargava** Partner ## 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** 2023 **Venture** 2023 **Seed** 2024 **Crowdfunding** 2024 **Pre-seed** 2025 **Series B** 2026 [Accel](https://millionrounds.com/fund/accel) L [Antler](https://millionrounds.com/fund/antler) [Goodwater Capital](https://millionrounds.com/fund/goodwater-capital) [QED Investors](https://millionrounds.com/fund/qed-investors) [Headline](https://millionrounds.com/fund/headline) [Everywhere Ventures](https://millionrounds.com/fund/everywhere-ventures) [Seedrs](https://millionrounds.com/fund/seedrs) [Ascension](https://millionrounds.com/fund/ascension) [Drive Capital](https://millionrounds.com/fund/drive-capital) [Corazon Capital](https://millionrounds.com/fund/corazon-capital) ## Everyone who backed them [Accel](https://millionrounds.com/fund/accel) VC firm **1** round, led 1 [Antler](https://millionrounds.com/fund/antler) VC firm **1** round [Goodwater Capital](https://millionrounds.com/fund/goodwater-capital) VC firm **1** round [QED Investors](https://millionrounds.com/fund/qed-investors) VC firm **1** round [Headline](https://millionrounds.com/fund/headline) VC firm **1** round [Everywhere Ventures](https://millionrounds.com/fund/everywhere-ventures) VC firm **1** round [Seedrs](https://millionrounds.com/fund/seedrs) VC firm **1** round [Ascension](https://millionrounds.com/fund/ascension) VC firm **1** round [Drive Capital](https://millionrounds.com/fund/drive-capital) VC firm **1** round [Corazon Capital](https://millionrounds.com/fund/corazon-capital) VC firm **1** round [Michigan Rise](https://millionrounds.com/fund/michigan-rise) VC firm **1** round [SBXi Fund](https://millionrounds.com/fund/sbxi) VC firm **1** round [Flourish Ventures](https://millionrounds.com/fund/flourish-ventures-2) VC firm **1** round [Groove Capital](https://millionrounds.com/fund/groove-capital) VC firm **1** round Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=tandem). ## Also claim to have backed them This firm lists Tandem 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. [Jayesh Parekh](https://millionrounds.com/fund/jayesh-parekh) Angel Per its own site ## Quick answers about Tandem ### Who invested in Tandem? Tandem's investors include Accel, Antler, Goodwater Capital, QED Investors and Headline, and 9 more on record. Accel led its latest round. ### How much has Tandem raised? Tandem has raised $140M across 6 rounds since 2023. ### When did Tandem last raise? Tandem's most recent round was a Series B of $100M in Jan 2026, led by Accel. ### What was Tandem's biggest round? Its most recent round, $100M in Jan 2026, is also its largest on record. ### Who backed Tandem first? Tandem's first round on record, in Feb 2023, was backed by Drive Capital and SBXi Fund. ### What stage is Tandem at? Tandem's latest named round is a Series B, in Jan 2026. ### Where is Tandem based? Tandem is based in the United States. ### Who led Tandem's rounds? Accel led the Series B in 2026. ## Companies like Tandem In the same sector, and raised in the last eighteen months. [**Clark** $11M · Nov 2026](https://millionrounds.com/company/clark)[**Pathfinder** $13M · Nov 2026](https://millionrounds.com/company/pathfinder)[**Settle** $103M · Oct 2026](https://millionrounds.com/company/settle)[**Midstream Health** $27M · Oct 2026](https://millionrounds.com/company/midstream-health)[**Collective** $219M · Oct 2026](https://millionrounds.com/company/collective)[**SpendRule** $6.0M · Oct 2026](https://millionrounds.com/company/spendrule) ## 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