Investors / Fourth Realm
Fourth Realm
Venture capital
Fourth Realm is a venture capital firm that invests in early-stage enterprise and industrial innovation. It partners with mission-driven founders, emphasizing founder-problem-fit.
Invests inAI & Machine LearningEducation
In its own wordsenterpriseindustrialspacefintechhealthcareenergy
Your fit with Fourth Realm
Four questions about your startup
See how your round matches what it backs, point by point.
Or find every investor that fitsFourth Realm lists 28 checked portfolio companies on its own site. Its largest themes are AI & Machine Learning (23%), Education (18%) and E-commerce & Marketplaces (11%). 100% of its companies are based in United States. It invests most often alongside Y Combinator, General Catalyst and Interplay.
No funding round on record names Fourth Realm yet, so the figures come from its portfolio page.
Round figures show recent activity, not Fourth Realm's whole history. Rounds on record name 0 companies; its own site lists 28. 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.
Investment themes
share of its checked companiesThis firmAll checked companies
Show as a table
| This firm | All checked companies | |
|---|---|---|
| AI & Machine Learning | 23% | 18% |
| Education | 18% | 7% |
| E-commerce & Marketplaces | 11% | 6% |
| Healthcare & Biotech | 11% | 15% |
| Fintech | 11% | 12% |
| Enterprise Software | 7% | 8% |
| Cybersecurity | 5% | 4% |
| Industrial & Manufacturing | 5% | 7% |
Invests most often with
firms sharing its portfolio companiesShow as a table
| Share | |
|---|---|
| Y Combinator | 6 |
| General Catalyst | 4 |
| Interplay | 4 |
| Founders Fund | 3 |
| Glade Brook Capital Partners | 3 |
| Khosla Ventures | 3 |
| Koru Capital | 3 |
| Sequoia Capital | 3 |
Investor profile
percentile among all firmsShow as a table
| Measure | Percentile of all firms | Value |
|---|---|---|
| Portfolio size | 65th | 28 companies |
| Recent activity | 46th | 0 rounds in 12 months |
| Early stage | 54th | 0% of entries at pre-seed or seed |
| Evidence | 52th | 0% of companies confirmed by a round |
| Sector focus | 26th | 23% in its largest sector |
| Reach | 19th | 1 country |
Its portfolio companies
where they are based, and what their own sites showSite status
- Site answers28100%
- 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 togetherCompare Fourth Realm head to head
portfolio size, rounds, entry stages, themes and the companies both backThree or more firms at once: portfolio overlap.
Portfolio
28 companies checked against their own sites| Company | What it does | Themes | First round with it | Evidence |
|---|---|---|---|---|
| Avion School provides online coding bootcamp education for future developers | EducationEducation | Portfolio page | ||
| Barn2Door helps farmers make more money and save time by providing software and services for marketing, selling, and managing their businesses | AI & Machine LearningE-commerce & Marketplaces | Portfolio page | ||
| Text Blaze provides a tool for saving and reusing text snippets and templates in various applications | EducationHealthcare & Biotech | Portfolio page | ||
| Portfolio page | ||||
| Claroty provides cybersecurity software for cyber-physical systems, offering asset inventory, exposure management, network protection, secure access, and threat detection across industrial, healthcare, commercial, and public sector environments. | CybersecurityIndustrial & Manufacturing | Portfolio page | ||
| Portfolio page | ||||
| Emulate makes Organ-Chips for research and development | Healthcare & Biotech | Portfolio page | ||
| Enki provides personalized, AI-powered learning in coding and tech skills | EducationAI & Machine Learning | Portfolio page | ||
| Expedock manages remote teams for various industries, handling tasks such as hiring, payroll, and day-to-day operations | Human ResourcesEducation | Portfolio page | ||
| Fieldguide provides software for audit and advisory firms to manage their practices and engagements. | FintechEnterprise Software | Portfolio page | ||
| Gr4vy provides a payment orchestration platform for enterprises | Fintech | Portfolio page | ||
| Great Expectations provides a data quality platform with an open source solution called GX Core. | Enterprise SoftwareAI & Machine Learning | Portfolio page | ||
| Kahoona analyzes user interactions to accurately segment audience data and offer real-time targeting and personalization | AI & Machine LearningE-commerce & Marketplaces | Portfolio page | ||
| Portfolio page | ||||
| Pahdo Labs is a gaming startup creating anime-inspired games and a social world for players | Gaming | Portfolio page | ||
| Parlor shows software companies where they come up on Google, Bing, and five AI assistants | AI & Machine LearningSpace & Defense | Portfolio page | ||
| Perl Street provides financial infrastructure and management tools for distributed energy assets and renewable energy projects. | FintechEducation | Portfolio page | ||
| Quo provides a shared phone system for small businesses, offering features such as calling, text messaging, and analytics. | EducationHealthcare & Biotech | Portfolio page | ||
| Reality Defender detects deepfakes and AI callers in audio, video, and images | AI & Machine LearningCybersecurity | Portfolio page | ||
| Portfolio page |
About this data
site last read 5 Nov 2026- Site
- fourthrealm.vc
- Last read
- 5 Nov 2026
- Watching since
- 6 Nov 2026
- Companies checked
- 28
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 Fourth Realm's profile as data
Pull Fourth Realm's 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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- Full listsEvery portfolio row and two-firm overlap
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- AlertsFollow 5 investors for portfolio and fund changes
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