Investors / United States / 43
43
Micro VC · San Francisco, CA, United States · North America
43 is an early-stage investment firm that writes first checks of up to $500K for up to 10% of a company and gives founders access to its San Francisco co-working space. It also provides fundraising guidance, investor introductions, and a 1:1 relationship with both partners.
Invests inAI & Machine Learning
In its own wordspre-seedfounder supportco-workingproduct-market fit
Your fit with 43
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See how your round matches what it backs, point by point.
Or find every investor that fits43 lists 33 checked portfolio companies on its own site and is named in 2 funding rounds. Its most frequent entry is Seed, 100% of the companies with a known first round. Its largest themes are AI & Machine Learning (26%), Enterprise Software (12%) and Healthcare & Biotech (9%). 100% of its companies are based in United States. It invests most often alongside Precursor Ventures, 10VC and 14Peaks Capital.
Counts come from funding rounds that name 43, complete from mid-2025: earlier rounds appear only when they were reported later. Round amounts and full round histories are on Fundup AI.
Round figures show recent activity, not 43's whole history. Rounds on record name 2 companies; its own site lists 33. Funding rounds are complete from mid-2025, so counts and the yearly trend undercount a firm that invested before then. The portfolio, themes and places come from its own site and are not affected.
Entry stage
share of companies by the stage of its first roundShow as a table
| Value | |
|---|---|
| Pre-seed | 0% |
| Seed | 100% |
| Series A | 0% |
| Series B | 0% |
| Growth | 0% |
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 | 0 | 0 |
| '21 | 0 | 0 |
| '22 | 0 | 0 |
| '23 | 0 | 0 |
| '24 | 0 | 0 |
| '25 | 2 | 0 |
| '26 | 0 | 0 |
Investor profile
percentile among all firmsShow as a table
| Measure | Percentile of all firms | Value |
|---|---|---|
| Portfolio size | 71th | 33 companies |
| Recent activity | 59th | 1 rounds in 12 months |
| Early stage | 100th | 100% of entries at pre-seed or seed |
| Evidence | 57th | 3% of companies confirmed by a round |
| Sector focus | 40th | 26% in its largest sector |
| Reach | 19th | 1 country |
Investment themes
share of its checked companiesThis firmAll checked companies
Show as a table
| This firm | All checked companies | |
|---|---|---|
| AI & Machine Learning | 26% | 18% |
| Enterprise Software | 12% | 8% |
| Healthcare & Biotech | 9% | 15% |
| Fintech | 9% | 12% |
| Media & Entertainment | 9% | 4% |
| Real Estate & Construction | 7% | 3% |
| Human Resources | 5% | 1% |
| E-commerce & Marketplaces | 5% | 6% |
Invests most often with
firms sharing its portfolio companiesShow as a table
| Share | |
|---|---|
| Precursor Ventures | 2 |
| 10VC | 1 |
| 14Peaks Capital | 1 |
| 2048 Ventures | 1 |
| AIX Ventures | 1 |
| Adapt Ventures | 1 |
| Adverb Ventures | 1 |
| Advisors.Fund | 1 |
Its portfolio companies
where they are based, and what their own sites showSite status
- Site answers33100%
- 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.
Co-investor network
who it backs companies with, and who they back togetherAll co-investors or Compare portfolios with Precursor Ventures
Compare 43 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 43| Date | Company | Stage |
|---|---|---|
| 26 Nov 2025 | Seed | |
| 23 Jul 2025 | Seed |
Round details for 43
Amounts, full round histories and every co-investor in 43's rounds are on Fundup AI. VCinfo covers investors and their portfolios.
Portfolio
33 companies checked against their own sites| Company | What it does | Themes | First round with it | Evidence |
|---|---|---|---|---|
| BuildVision helps manufacturers and their sales offices sell more equipment by automatically building pipeline and tracking market data from specs and schedules. | Industrial & Manufacturing | Portfolio page | ||
| CollabWORK helps employers get found, distributed, and re-engaged across AI, communities, and their own talent networks | AI & Machine LearningHuman Resources | Portfolio page | ||
| Dart Health develops and deploys clinical AI machines to accelerate care delivery in healthcare settings. | Healthcare & Biotech | Portfolio page | ||
| Portfolio page | ||||
| Ensemble Technologies provides a platform to build, deploy, and manage AI agents and workflows for businesses. | AI & Machine LearningEnterprise Software | Portfolio page | ||
| Flotive helps identify permitting and compliance risks for infrastructure projects using AI and expert reviews. | AI & Machine LearningReal Estate & Construction | Portfolio page | ||
| FlowFi is where entrepreneurs and owners find verified accountants, CFOs, and HR specialists | FintechHuman Resources | Portfolio page | ||
| Embed generates trusted data and insight for commercial real estate deals | Real Estate & ConstructionFintech | Portfolio page | ||
| GiveCard issues physical and virtual prepaid cards and sends bank transfers to help organizations disburse funds at scale | FintechFintech | Portfolio page | ||
| Grid runs utility operations end-to-end, from invoice retrieval to resident billing and compliance | Real Estate & ConstructionAI & Machine Learning | Portfolio page | ||
| Harness provides insurance services to restaurants and similar establishments | FintechFood & Agriculture | Portfolio page | ||
| The company provides a headcount management platform for workforce planning and management. | Human ResourcesEnterprise Software | Portfolio page | ||
| Hypernatural creates AI videos from prompts to post in minutes with its end-to-end video editor. | AI & Machine LearningMedia & Entertainment | Jul 2025Seed | Page + round | |
| Insight Health develops AI-powered document processing and clinical workflow solutions for healthcare providers | Healthcare & Biotech | Portfolio page | ||
| Kaiden provides a platform for law enforcement agencies to train and assess officer readiness through simulated scenarios and AI-powered role-players. | AI & Machine LearningEducation | Portfolio page | ||
| Kit Switch delivers pre-designed kitchen, bathroom, and storage kits for multifamily housing | Real Estate & Construction | Portfolio page | ||
| Lace Labs designs and deploys AI agents that forecast demand and move inventory to the right place at the right time | AI & Machine LearningIndustrial & Manufacturing | Portfolio page | ||
| Loma builds custom platforms, such as marketplaces, service directories, or lead-gen engines, for creators to own and earn revenue from their audience | E-commerce & MarketplacesMedia & Entertainment | Portfolio page | ||
| Nema accelerates the deployment of safety-critical autonomous systems | AI & Machine LearningCybersecurity | Portfolio page | ||
| The company builds general-purpose robots for industry to support people in hazardous and physically-demanding work. | Robotics & Hardware | Portfolio page |
About this data
site last read 5 Nov 2026- Site
- 43.io
- Last read
- 5 Nov 2026
- Watching since
- 5 Nov 2026
- Rounds since
- 23 Jul 2025
- Companies checked
- 33
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.
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