Day One Ventures
Actively deployingSeedβSeries A
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.
What they invest in
from 16 of 16 portfolio companiesSaaS Γ9Enterprise Software Γ8AI & Machine Learning Γ7Climate Tech Γ4Future of Work Γ3Developer Tools Γ2Healthtech Γ2Impact & Social Good Γ2
HQs:United StatesΓ14South KoreaΓ1
Investments Β· 16 tracked
founders shown can be your intro pathAlga 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
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)
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
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 μνΈ (Sang-ho Jung)
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 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
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
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
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
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
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
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
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
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
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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