Investors / United States / Day One Ventures
Day One Ventures
Venture capital · San Francisco, CA, United States · North America
Day One Ventures is a venture capital firm that backs early-stage companies and leads their communications and PR. It helps portfolio companies with press launches, marketing, hiring, and customer introductions.
Invests inAI & Machine LearningFintechIndustrial & Manufacturing
In its own wordsearly-stagecommunicationsprcustomer obsessiontechnology
Your fit with Day One Ventures
Four questions about your startup
See how your round matches what it backs, point by point.
Or find every investor that fitsDay One Ventures lists 7 checked portfolio companies on its own site and is named in 7 funding rounds. Its most frequent entry is Seed, 43% of the companies with a known first round. Its largest themes are AI & Machine Learning (27%), Fintech (18%) and Industrial & Manufacturing (18%). 86% of its companies are based in United States. It invests most often alongside Andreessen Horowitz, Y Combinator and Felicis.
Counts come from funding rounds that name Day One Ventures, complete from mid-2025: earlier rounds appear only when they were reported later. Round amounts and full round histories are on Fundup AI.
Entry stage
share of companies by the stage of its first roundShow as a table
| Value | |
|---|---|
| Pre-seed | 0% |
| Seed | 43% |
| Series A | 43% |
| Series B | 0% |
| Growth | 14% |
Activity by year
rounds it joined, last 10 yearsShow as a table
| Total | Rounds it led | |
|---|---|---|
| '17 | 0 | 0 |
| '18 | 0 | 0 |
| '19 | 0 | 0 |
| '20 | 1 | 0 |
| '21 | 2 | 0 |
| '22 | 0 | 0 |
| '23 | 0 | 0 |
| '24 | 1 | 0 |
| '25 | 2 | 0 |
| '26 | 1 | 0 |
Investor profile
percentile among all firmsShow as a table
| Measure | Percentile of all firms | Value |
|---|---|---|
| Portfolio size | 12th | 7 companies |
| Recent activity | 59th | 1 rounds in 12 months |
| Early stage | 67th | 43% of entries at pre-seed or seed |
| Evidence | 52th | 0% of companies confirmed by a round |
| Sector focus | 43th | 27% in its largest sector |
| Reach | 42th | 2 countries |
Investment themes
share of its checked companiesThis firmAll checked companies
Show as a table
| This firm | All checked companies | |
|---|---|---|
| AI & Machine Learning | 27% | 18% |
| Fintech | 18% | 12% |
| Industrial & Manufacturing | 18% | 7% |
| Legal & Compliance | 9% | 2% |
| Real Estate & Construction | 9% | 3% |
| Enterprise Software | 9% | 8% |
| Education | 9% | 7% |
Its portfolio companies
where they are based, and what their own sites showSite status
- Site answers7100%
- No longer answers00%
- Points to another company00%
- Parked or sold domain00%
A site that stops answering three checks in a row is counted as no longer answering; that is not proof of closure. A site that points to another company is often an acquisition.
Invests most often with
firms sharing its portfolio companiesShow as a table
| Share | |
|---|---|
| Andreessen Horowitz | 3 |
| Y Combinator | 3 |
| Felicis | 2 |
| 1confirmation | 1 |
| AIX Ventures | 1 |
| Aldea Ventures | 1 |
| AlleyCorp | 1 |
| Amadeus Capital Partners | 1 |
Co-investor network
who it backs companies with, and who they back togetherAll co-investors or Compare portfolios with Andreessen Horowitz
Compare Day One Ventures head to head
portfolio size, rounds, entry stages, themes and the companies both backThree or more firms at once: portfolio overlap.
Recent portfolio activity
when companies last raised with Day One Ventures| Date | Company | Stage |
|---|---|---|
| 12 Jan 2026 | Seed | |
| 10 Nov 2025 | Series C+ | |
| 5 Mar 2025 | Series A | |
| 22 Nov 2024 | Seed | |
| 19 Nov 2021 | Seed | |
| 21 Oct 2021 | Series A | |
| 23 Jun 2020 | Series A |
Round details for Day One Ventures
Amounts, full round histories and every co-investor in Day One Ventures' rounds are on Fundup AI. VCinfo covers investors and their portfolios.
Portfolio
7 companies checked against their own sites| Company | What it does | Themes | First round with it | Evidence |
|---|---|---|---|---|
| DoNotPay uses artificial intelligence to help users fight big corporations, protect their privacy, find hidden money, and beat bureaucracy. | Legal & ComplianceFintech | Jun 2020Series A | Funding round | |
| Epoch Biodesign converts waste into recycled materials, including nylon 6,6, using its biorecycling technology and AI-enabled platform | Industrial & Manufacturing | Mar 2025Series A | Funding round | |
| The company provides AI-powered solutions for multifamily property management, including leasing, rent collections, and resident communication. | Real Estate & ConstructionAI & Machine Learning | Nov 2021Seed | Funding round | |
| Sauna is an AI workspace that handles busywork for its users | AI & Machine LearningEnterprise Software | Nov 2024Seed | Funding round | |
| Jan 2026Seed | Funding round | |||
| Valar Atomics is scaling nuclear energy for heavy industrial power and clean hydrocarbon fuel production. | EducationIndustrial & Manufacturing | Nov 2025Series C+ | Funding round | |
| World securely and anonymously proves that every user is a real and unique human online. | AI & Machine LearningFintech | Oct 2021Series A | Funding round |
About this data
site last read 5 Nov 2026- Site
- dayoneventures.com
- Last read
- 5 Nov 2026
- Watching since
- 6 Nov 2026
- Rounds since
- 23 Jun 2020
- Companies checked
- 7
Rates come from what VCinfo has observed since observation_start. Firms tend to remove companies that closed, so early rates understate reality. A company leaving a portfolio page does not mean it closed or exited. An unreachable site means our checks failed, nothing more.
Get Day One Ventures' profile as data
Pull Day One Ventures' portfolio, co-investors and changes through one API key or MCP, open every portfolio row, compare it with other firms, and get an email when it adds a company or files a fund.
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