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Day One Ventures

Actively deploying

Seed–Series A

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Fund manager profile

Day One Ventures is a venture fund manager. SEC filings show 2 venture funds on record, most recently Day One Ventures Fund III, L.P. filed April 2025.

Source: SEC EDGAR Form D filings. Firm website data not yet available.

Stage
Seed–Series A
Founded
2018
Tracked investments
16

What they invest in

from 16 of 16 portfolio companies

SaaS Γ—9Enterprise Software Γ—8AI & Machine Learning Γ—7Climate Tech Γ—4Future of Work Γ—3Developer Tools Γ—2Healthtech Γ—2Impact & Social Good Γ—2

HQs:United StatesΓ—14South KoreaΓ—1

Investments Β· 16 tracked

founders shown can be your intro path
Alga Biosciencesalga.bioinπ•βœ“ verified

Alga is a biotechnology company that develops algae-based solutions, likely for agriculture, food production, or environmental applications.

Advanced ManufacturingAgTechBiotechClimate TechSan Francisco, US

Alex Brown(Co-founder and CEO)Daria Balatsky(Founder)inAlexander Brown(Founder)inCaroline McKeon(Founder)in

AnyRoadanyroad.comβœ“ verified

AnyRoad provides a platform for managing and optimizing events, tours, classes, and activations for businesses seeking to build brand loyalty and increase return on investment. The software integrates booking, ticketing, payments, data capture, and analytics for experiential marketing campaigns.

Enterprise SoftwareMarketing TechSaaSSan Francisco, US

Jonathan Yaffe(Co-founder)Daniel Yaffe(Co-founder)

Artisanartisan.coin𝕏

Artisan builds an AI-powered platform that consolidates fragmented work software tools and automates repetitive workflows through AI collaborators. The platform initially focuses on outbound sales but aims to expand across industries including customer success, recruiting, and enterprise operations.

AI & Machine LearningEnterprise SoftwareFuture of WorkSaaSSan Francisco, US

Jaspar Carmichael-Jack(Founder)inSam Stallingsin

Blue Labsbluelabs.kr

BlueLabs produces water purification filters and eco-friendly water treatment materials from recycled oyster shells, addressing water contamination and circular economy challenges. The company transforms agricultural waste into high-value filtration products that remove heavy metals and reduce carbon emissions compared to traditional activated carbon processes.

Circular EconomyCleantechClimate TechImpact & Social GoodWellness & FitnessSeocho, KR

μ •μƒν˜Έ (Sang-ho Jung)

Cabalgetcabal.comin𝕏

Cabal provides AI-powered relationship intelligence that infers connections from public data for venture capital platform teams, deal sourcing professionals, and sales organizations. The product delivers connection insights through multiple interfaces including in-app chat, AI assistants, Slack integration, and API access.

AI & Machine LearningEnterprise SoftwareSaaSNew York City, US

Fahim Ferdous(Founder)in

Flow Clubflow.clubin𝕏

Flow Club is a virtual coworking platform that facilitates focused productivity through live, structured sessions using body doubling and the Pomodoro Technique. It serves individual professionals, students, and remote workers seeking to improve focus and overcome procrastination.

Enterprise SoftwareFuture of WorkSaaSWellness & FitnessSan Francisco, US

David Tran(Founder)in

Haystacktryhaystack.devin𝕏

Haystack is a GitHub-integrated system that evaluates AI-generated pull requests by analyzing code context, diffs, agent reasoning, and test results to determine whether changes can be merged, require fixes, or need human review. It helps engineering teams manage high volumes of AI-generated code changes while maintaining quality standards and focusing human review effort on complex decisions.

AI & Machine LearningDeveloper ToolsEnterprise SoftwareNew York City, US

Jake Yatvitskiy(Founder)inAkshay Subramaniam(Founder)in

Haystackusehaystack.ioin𝕏

Haystack connects to Git and Jira to help engineering teams automate best practices, track capacity, and generate reports across the planning, execution, and delivery lifecycle. It serves product engineering teams seeking to improve planning consistency, cycle time, and delivery visibility.

Developer ToolsEnterprise SoftwareSaaSSan Francisco, US

Julian Colina(Founder)inKan Yilmaz(Founder)in

Orchidorchid.aiin𝕏

Orchid is a personal assistant that operates via text messaging to help users with organization, information retrieval, and task completion. It integrates with users' existing tools and apps to automate habits, manage administrative tasks, and track personal details.

AI & Machine LearningConsumerEnterprise SoftwareFuture of WorkSan Francisco, US

Nizar Abi Zaher(Founder)inAdam Wazzan(Founder)in

Orchidorchid.healthin𝕏

Orchid provides an electronic health record system with AI capabilities for solo and small-group mental health practices, handling administrative tasks and clinical documentation to reduce manual work.

AI & Machine LearningHealthtechSaaSSan Francisco, US

Joseph Pomianowski(Founder)in

Pathrisepathrise.comin𝕏

Pathrise offers career coaching, networking access, and job search software to help individuals find employment, collecting payment only after successful placement.

EdTechSan Francisco, US

Kevin Wu(Founder/CEO)inEvan Limanto(Founder)in

Rainmakerrainmaker.com

Rainmaker uses cloud seeding technology to combat water scarcity by generating freshwater at scale. The company operates in the climate tech and water security sector, positioning cloud seeding as a more efficient alternative to desalination and water pipelines.

Climate TechDeep TechEl Segundo, US

Rainmakerrainmaker.nycin𝕏

Rainmaker provides a cryptocurrency wallet using account abstraction technology that allows users to open accounts via email, fund them directly from traditional banking sources, and participate in decentralized finance without paying blockchain transaction fees.

Fintech

Carlos Reyes Stoneham(Founder)inBrent Traut(Founder)in

Tivarativara.comin𝕏

Tivara provides AI agents that automate inbound patient phone calls for healthcare practices, handling scheduling, prescription refills, intake, and after-hours triage while integrating with existing EMR and practice management systems. The platform reduces operational costs and improves patient access by resolving routine requests autonomously.

AI & Machine LearningHealthtechSaaSNew York City, US

Tej Seelamsetty(Founder)inAumesh Misra(Founder)in

Vibrant Planetvibrantplanet.net

Vibrant Planet Data Commons is a 501(c)(3) nonprofit that generates and publicly shares scientific research on environmental risks, particularly focused on wildfire resilience and forest science. The organization collaborates with researchers and funders to expand participation in environmental science and data analytics beyond traditional scientific communities.

Climate TechData & InfrastructureGovTechImpact & Social GoodSaaS

Zumagetzuma.comin𝕏

Zuma develops AI-powered automation software for property management companies, automating leasing operations tasks like scheduling tours and lead management. The platform serves property management teams and leasing agents in the US real estate industry.

AI & Machine LearningEnterprise SoftwarePropTechSaaSLos Angeles, US

Shiv Gettu(Founder)inKendrick Bradley(Founder)in

Frequently asked questions

What stage does Day One Ventures invest at?
Day One Ventures invests at the Seed, Series A stages.

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Day One Ventures photo

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