Investors / Irregular Expressions
Irregular Expressions
Venture capital
Irregular Expressions is an early-stage investment firm backed by a group of software engineering and product leaders. It invests in and advises infrastructure, data, and machine learning startups, and supports founders on product, engineering, and business challenges.
Invests inAI & Machine LearningEnterprise Software
In its own wordsinfrastructuredevopsartificial intelligencemachine learningdata engineeringsecurity
Your fit with Irregular Expressions
Four questions about your startup
See how your round matches what it backs, point by point.
Or find every investor that fitsIrregular Expressions lists 145 checked portfolio companies on its own site and is named in 1 funding round. Its most frequent entry is Seed, 100% of the companies with a known first round. Its largest themes are AI & Machine Learning (28%), Enterprise Software (17%) and Fintech (12%). 62% of its companies are based in United States. It invests most often alongside Y Combinator, Sequoia Capital and CapitalG.
Counts come from funding rounds that name Irregular Expressions, 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 Irregular Expressions' whole history. Rounds on record name 1 company; its own site lists 145. 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 | 1 | 0 |
| '25 | 0 | 0 |
| '26 | 0 | 0 |
Investor profile
percentile among all firmsShow as a table
| Measure | Percentile of all firms | Value |
|---|---|---|
| Portfolio size | 98th | 146 companies |
| Recent activity | 46th | 0 rounds in 12 months |
| Early stage | 100th | 100% of entries at pre-seed or seed |
| Evidence | 52th | 0% of companies confirmed by a round |
| Sector focus | 45th | 28% in its largest sector |
| Reach | 96th | 11 countries |
Investment themes
share of its checked companiesThis firmAll checked companies
Show as a table
| This firm | All checked companies | |
|---|---|---|
| AI & Machine Learning | 28% | 18% |
| Enterprise Software | 17% | 8% |
| Fintech | 12% | 12% |
| Cybersecurity | 8% | 4% |
| Healthcare & Biotech | 7% | 15% |
| E-commerce & Marketplaces | 5% | 6% |
| Industrial & Manufacturing | 5% | 7% |
| Space & Defense | 4% | 3% |
Invests most often with
firms sharing its portfolio companiesShow as a table
| Share | |
|---|---|
| Y Combinator | 14 |
| Sequoia Capital | 8 |
| CapitalG | 6 |
| Andreessen Horowitz | 5 |
| Drysdale Ventures | 5 |
| General Catalyst | 5 |
| Insight Partners | 5 |
| K5 Global | 5 |
Its portfolio companies
where they are based, and what their own sites showSite status
- Site answers14097%
- No longer answers00%
- Points to another company53%
- 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 Irregular Expressions 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 Irregular Expressions| Date | Company | Stage |
|---|---|---|
| 17 Dec 2024 | Seed |
Round details for Irregular Expressions
Amounts, full round histories and every co-investor in Irregular Expressions' rounds are on Fundup AI. VCinfo covers investors and their portfolios.
Portfolio
145 companies checked against their own sites| Company | What it does | Themes | First round with it | Evidence |
|---|---|---|---|---|
| 4D Sight is the AI-powered virtual advertising platform for live sport and esports. | GamingMedia & Entertainment | Portfolio page | ||
| Acquia provides a digital experience platform for managing content, community, and commerce | EducationHealthcare & Biotech | Portfolio page | ||
| Actual AI provides guardrails for AI-powered software development teams | AI & Machine LearningEnterprise Software | Portfolio page | ||
| Airbnb provides holiday rentals and unique homes for travelers. | Real Estate & ConstructionLegal & Compliance | Portfolio page | ||
| AlphaSTAR develops software tools for predictive analytics and material modeling in additive manufacturing and other engineering applications. | AI & Machine LearningAI & Machine Learning | Portfolio page | ||
| Alpic provides a cloud platform for building, deploying, and distributing ChatGPT apps and MCP servers | AI & Machine LearningSpace & Defense | Portfolio page | ||
| Arbitrum DAO is a community-driven decentralized governance system where users gain voting power to influence key decisions through the $ARB token. | FintechGaming | Portfolio page | ||
| The company hosts events and provides a venue for concerts and other performances. | Enterprise SoftwareEnterprise Software | Portfolio page | ||
| Portfolio page | ||||
| Atomic provides source code management and a Git alternative | Enterprise SoftwareAI & Machine Learning | Portfolio page | ||
AI & Machine LearningCybersecurity | Portfolio page | |||
| Beacon Biosignals uses AI-powered technology to accelerate drug development and power home sleep testing diagnostics | Healthcare & Biotech | Portfolio page | ||
| Portfolio page | ||||
Fintech | Portfolio page | |||
| Bluue builds frontier models and data collection devices for cardiology and maternity care | Healthcare & Biotech | Portfolio page | ||
| Blynt AI provides speech recognition technology and builds custom speech models for clients | AI & Machine LearningEnterprise Software | Portfolio page | ||
| Bridgewater Associates is a global macro investment firm that develops a fundamental understanding of how markets and economies work and translates that into insights and solutions for institutional investors | Fintech | Portfolio page | ||
| Calyx develops tailored software solutions for businesses | Healthcare & BiotechFintech | Portfolio page | ||
| Portfolio page | ||||
| Carbon Health provides primary and urgent care services, including virtual care and testing, to patients of all ages. | Healthcare & Biotech | Portfolio page |
About this data
site last read 5 Nov 2026- Site
- irregex.vc
- Last read
- 5 Nov 2026
- Watching since
- 5 Nov 2026
- Rounds since
- 17 Dec 2024
- Companies checked
- 145
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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