# Relay funding: rounds and investors > Relay has raised $207M across 8 rounds since 2013. Investors include General Catalyst, Union Square Ventures and Archetype. Every round with its source. Source: https://millionrounds.com/company/relay (Millionrounds; every figure on the page links to its filing or article) United States · [Funded startup](https://millionrounds.com/companies) # Who invested in *Relay* 8 rounds we have observed, with the 36 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 B2B Biotech Construction Raised 1 month ago Follow Relay and see its new rounds in your feed. [Start following](https://millionrounds.com/login?join=1&why=follow&next=%2Fcompany%2Frelay) Funding summary Updated 5 Nov 2026 **$207M** raised across 8 rounds since 2013, from 10 sources **$63M** Series B **$50M** Growth - **Latest round:** Round, $36M Oct 2026 - **Led by:** International Paper - **Biggest round:** $63M Series B · Dec 2017 - **Investors:** 36 (5 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. 2013 2015 2017 2019 2021 2023 2025 **$700K** Seed **$63M** Series B **$1.7M** Seed **$3.1M** Seed **$35M** Series A **$17M** Series B **$36M** Round - **First round:** Seed, $700K - **Biggest round:** $63M - **Usual gap between rounds:** 17 months ## The rounds - **Oct 2026** Round **$36M** *6 new* [International Paper](https://millionrounds.com/fund/international-paper) Lead [G2 Venture Partners](https://millionrounds.com/fund/g2-venture-partners) [Thayer Investment Partners](https://millionrounds.com/fund/thayer-investment-partners) [Harmonic Growth Partners](https://millionrounds.com/fund/harmonic-growth-partners) [Cerity Partners Ventures](https://millionrounds.com/fund/cerity-partners-ventures) [Wind River Ventures](https://millionrounds.com/fund/wind-river-ventures) Reported by Firms' own news pages and 1 other SEC filing: $36M sold - **May 2026** Growth **$50M** *5 new* [General Catalyst](https://millionrounds.com/fund/general-catalyst) Lead [Bain Capital Ventures](https://millionrounds.com/fund/bain-capital-ventures) [Inovia Capital](https://millionrounds.com/fund/inovia-capital) [Tribe Capital](https://millionrounds.com/fund/tribe-capital) [Panache Ventures](https://millionrounds.com/fund/panache-ventures) Reported by Ventureburn SEC filing: $42M sold - **Feb 2026** Series B **$17M** *2 new* [Union Square Ventures](https://millionrounds.com/fund/union-square-ventures) Lead [Archetype](https://millionrounds.com/fund/archetype) Lead Reported by Ventureburn SEC filing: $42M sold - **Feb 2025** Series A **$35M** *3 new* [Plural](https://millionrounds.com/fund/plural) Lead [Project A Ventures](https://millionrounds.com/fund/project-a) [Prologis Ventures](https://millionrounds.com/fund/prologis-ventures) Reported by TechCrunch - **Oct 2023** Seed **$3.1M** *5 new* [Andreessen Horowitz](https://millionrounds.com/fund/andreessen-horowitz) [Khosla Ventures](https://millionrounds.com/fund/khosla-ventures) [BoxGroup](https://millionrounds.com/fund/boxgroup) [DCVC](https://millionrounds.com/fund/data-collective) [Neo](https://millionrounds.com/fund/neo) Source recorded - **Dec 2021** Seed **$1.7M** *3 new* [Icehouse Ventures](https://millionrounds.com/fund/icehouse-ventures) [Blackbird Ventures](https://millionrounds.com/fund/blackbird-ventures-2) [BIP Ventures](https://millionrounds.com/fund/bip-ventures) Also list them on their own site [Variant](https://millionrounds.com/fund/variant) Source recorded and 1 other - **Dec 2017** Series B **$63M** *6 new* [Alexandria Real Estate Equities](https://millionrounds.com/fund/alexandria) [Casdin Capital](https://millionrounds.com/fund/casdin-capital) [Third Rock Ventures](https://millionrounds.com/fund/third-rock-ventures) [EcoR1 Capital](https://millionrounds.com/fund/ecor1-capital) [Section 32](https://millionrounds.com/fund/section-32) BVF Partners/ GV Reported by FinSMEs - **Feb 2013** Seed **$700K** *6 new* [Social Capital](https://millionrounds.com/fund/social-capital) [The Social+Capital Partnership](https://millionrounds.com/fund/the-social-capital-partnership) [Valar Ventures](https://millionrounds.com/fund/valar-ventures-llc) [Graph Ventures](https://millionrounds.com/fund/graph-ventures) [Real Ventures](https://millionrounds.com/fund/real-ventures) [Anand Agarawala](https://millionrounds.com/fund/anand-agarawala) Reported by techcrunch.com ## 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** 2013 **Series B** 2017 **Seed** 2021 **Seed** 2023 **Series A** 2025 **Series B** 2026 **Growth** 2026 **Round** 2026 [General Catalyst](https://millionrounds.com/fund/general-catalyst) L [Union Square Ventures](https://millionrounds.com/fund/union-square-ventures) L [Archetype](https://millionrounds.com/fund/archetype) L [Plural](https://millionrounds.com/fund/plural) L [International Paper](https://millionrounds.com/fund/international-paper) L [Andreessen Horowitz](https://millionrounds.com/fund/andreessen-horowitz) [Khosla Ventures](https://millionrounds.com/fund/khosla-ventures) [BoxGroup](https://millionrounds.com/fund/boxgroup) [Bain Capital Ventures](https://millionrounds.com/fund/bain-capital-ventures) [DCVC](https://millionrounds.com/fund/data-collective) ## Everyone who backed them [General Catalyst](https://millionrounds.com/fund/general-catalyst) VC firm **1** round, led 1 [Union Square Ventures](https://millionrounds.com/fund/union-square-ventures) VC firm **1** round, led 1 [Archetype](https://millionrounds.com/fund/archetype) VC firm **1** round, led 1 [Plural](https://millionrounds.com/fund/plural) VC firm **1** round, led 1 [International Paper](https://millionrounds.com/fund/international-paper) Investment firm **1** round, led 1 [Andreessen Horowitz](https://millionrounds.com/fund/andreessen-horowitz) VC firm **1** round [Khosla Ventures](https://millionrounds.com/fund/khosla-ventures) VC firm **1** round [BoxGroup](https://millionrounds.com/fund/boxgroup) VC firm **1** round [Bain Capital Ventures](https://millionrounds.com/fund/bain-capital-ventures) VC firm **1** round [DCVC](https://millionrounds.com/fund/data-collective) VC firm **1** round [Neo](https://millionrounds.com/fund/neo) Accelerator **1** round [Inovia Capital](https://millionrounds.com/fund/inovia-capital) VC firm **1** round [Social Capital](https://millionrounds.com/fund/social-capital) VC firm **1** round [Tribe Capital](https://millionrounds.com/fund/tribe-capital) VC firm **1** round [Icehouse Ventures](https://millionrounds.com/fund/icehouse-ventures) VC firm **1** round [Blackbird Ventures](https://millionrounds.com/fund/blackbird-ventures-2) VC firm **1** round [Project A Ventures](https://millionrounds.com/fund/project-a) VC firm **1** round [Alexandria Real Estate Equities](https://millionrounds.com/fund/alexandria) VC firm **1** round [Casdin Capital](https://millionrounds.com/fund/casdin-capital) VC firm **1** round [The Social+Capital Partnership](https://millionrounds.com/fund/the-social-capital-partnership) VC firm **1** round [Valar Ventures](https://millionrounds.com/fund/valar-ventures-llc) VC firm **1** round [Graph Ventures](https://millionrounds.com/fund/graph-ventures) VC firm **1** round [Panache Ventures](https://millionrounds.com/fund/panache-ventures) VC firm **1** round [Third Rock Ventures](https://millionrounds.com/fund/third-rock-ventures) VC firm **1** round [BIP Ventures](https://millionrounds.com/fund/bip-ventures) VC firm **1** round [EcoR1 Capital](https://millionrounds.com/fund/ecor1-capital) Private equity **1** round [Real Ventures](https://millionrounds.com/fund/real-ventures) VC firm **1** round [Section 32](https://millionrounds.com/fund/section-32) VC firm **1** round [G2 Venture Partners](https://millionrounds.com/fund/g2-venture-partners) VC firm **1** round [Thayer Investment Partners](https://millionrounds.com/fund/thayer-investment-partners) VC firm **1** round [Anand Agarawala](https://millionrounds.com/fund/anand-agarawala) Angel **1** round [Prologis Ventures](https://millionrounds.com/fund/prologis-ventures) VC firm **1** round [Harmonic Growth Partners](https://millionrounds.com/fund/harmonic-growth-partners) VC firm **1** round [Cerity Partners Ventures](https://millionrounds.com/fund/cerity-partners-ventures) Corporate VC **1** round [Wind River Ventures](https://millionrounds.com/fund/wind-river-ventures) VC firm **1** round BVF Partners/ GV 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=relay). ## Also claim to have backed them These 6 firms list Relay 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. [6th Man Ventures](https://millionrounds.com/fund/6mv) VC firm Per its own site [Variant](https://millionrounds.com/fund/variant) VC firm Pre-seed, 2021, per its site [1kx](https://millionrounds.com/fund/1kx) VC firm 2022, per its site [Rainfall Ventures](https://millionrounds.com/fund/rainfall-ventures) VC firm Per its own site [Mistral Equity Partners](https://millionrounds.com/fund/mistral-equity-partners) Private equity Per its own site [ShapeShift](https://millionrounds.com/fund/shapeshift) Investment firm Per its own site ## Quick answers about Relay ### Who invested in Relay? Relay's investors include General Catalyst, Union Square Ventures, Archetype, Plural and International Paper, and 31 more on record. International Paper led its latest round. ### How much has Relay raised? Relay has raised $207M across 8 rounds since 2013. ### When did Relay last raise? Relay's most recent round was an Undisclosed round of $36M in Oct 2026, led by International Paper. ### What was Relay's biggest round? Relay's largest round on record is $63M (Series B), in Dec 2017. ### Who backed Relay first? Relay's first round on record, in Feb 2013, was backed by Social Capital, The Social+Capital Partnership and Valar Ventures and 3 others. ### What stage is Relay at? Relay's latest named round is an Undisclosed round, in Oct 2026. ### Where is Relay based? Relay is based in the United States. ### Who led Relay's rounds? Plural led the Series A in 2025; Union Square Ventures led the Series B in 2026; General Catalyst led the Growth in 2026; International Paper led the Undisclosed round in 2026. ## Companies like Relay In the same sector, and raised in the last eighteen months. [**Laza Medical** $160M · Nov 2026](https://millionrounds.com/company/laza-medical)[**Journify** $12M · Nov 2026](https://millionrounds.com/company/journify)[**Nooks** $543M · Nov 2026](https://millionrounds.com/company/nooks)[**Agrani Labs** $123M · Nov 2026](https://millionrounds.com/company/agrani-labs)[**Applied Compute** $580M · Nov 2026](https://millionrounds.com/company/applied-compute)[**Guava** $13M · Nov 2026](https://millionrounds.com/company/guava) ## 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