# Paul Graham

> Paul Graham is a seed investor at Yahoo! Small Business backing Software. See 86 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [Yahoo! Small Business](https://shizune.co/investors/profile/viaweb)
- Location: Mountain View, United States
- Total investments: 86
- Last investment: Aug 2026
- Lead investor: 6%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/paul-graham-865b4692
- X (Twitter): http://twitter.com/paulg
- Website: http://www.paulgraham.com/articles.html

Paul Graham is a seed investor at Yahoo! Small Business in Mountain View focused on Software and Artificial Intelligence. Paul Graham is the Founder of Y Combinator.

## Round sizes

| Stage | Round size |
| --- | --- |
| Seed | $1M–$9.5M |
| Angel | $70k–$700k |
| Series A | $3.5M–$30M |

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Software | 25 | 29% |
| Artificial Intelligence | 25 | 29% |
| SaaS | 8 | 9% |
| Developer Tools | 8 | 9% |
| Information Technology | 7 | 8% |

123 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 53 | 62% |
| Series A | 11 | 13% |
| Angel | 6 | 7% |
| Series B | 4 | 5% |
| Pre-Seed | 3 | 3% |

8 stages tracked in total.

### Country

| Country | Investments | Share |
| --- | --- | --- |
| United States | 60 | 70% |
| Egypt | 1 | 1% |
| India | 1 | 1% |
| Canada | 1 | 1% |
| Kazakhstan | 1 | 1% |

8 countries tracked in total.

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Discovered Materials | AI agents that discover new materials for semiconductor chips. | $9M | Seed | Aug 10, 2026 |  |
| Kopra Bio | Kopra Bio is a Biotechnology Research firm offering that cure cancer through viral immunotherapy technology. | $9.1M | Seed | Jun 16, 2026 |  |
| Luel | Luel develops AI training data marketplace that supplies training datasets to connect AI enterprises and content contributors. | $31M | Seed | May 15, 2026 |  |
| AgentMail | AgentMail provides an API-first email platform that enables AI agents to send, receive, and manage emails with automation and analytics. | $6M | Seed | Mar 10, 2026 |  |
| QFEX | QFEX is the 24/7 exchange for traditional financial markets. We let you trade US equities, commodities and FX pairs with (or without) leverages of up to 50x. On QFEX, UX comes first: brokerless market access, seamless integration with traditional payment rails, and ultra-efficient Perpetual Futures offered over all asset classes. Trading hasnever been simpler or cheaper than with QFEX.Founded by Quants and Engineers from Citadel & Tower Research who saw an opportunity to make markets how they always should have been, QFEX will eventually replace the entire $100 billion exchange and clearing industry. | $9.5M | Seed | Mar 05, 2026 |  |
| Autosana | Autosana offers an AI-powered mobile app quality assurance platform that automates end-to-end testing using natural language instructions. Teams can describe test scenarios without writing code, and Autosana generates and runs the tests across iOS and Android environments. The tool integrates with CI/CD pipelines, adapts to interface changesthrough self-healing tests, and provides session replays for visual verification and debugging. It supports app frameworks like React Native, Flutter, Swift, and Kotlin, aiming to reduce the time and effort spent on manual or brittle automated testing. | $2.7M | Seed | Feb 17, 2026 |  |
| Veria Labs | Veria Labs is a cybersecurity company that provides AI-powered continuous penetration testing services targeting high-stakes industries. | $3.2M | Seed | Feb 09, 2026 |  |
| Orange Slice | Orange Slice provides an AI-driven sales intelligence platform that helps B2B teams identify companies showing buying intent by analyzing online signals such as job postings, website content, and social data. The company offers tools that scrape and enrich data, generate prospect lists, and build automated workflows that integrate with CRM andsales systems to support outreach prioritization. Its platform turns internet activity into structured insights that assist sales development and marketing teams in focusing on prospects with real-time intent signals rather than static lists. Orange Slice’s services aim to streamline lead research and enable actionable prospect targeting for revenue teams. | $5.3M | Seed | Feb 06, 2026 |  |
| Maritime Fusion | Maritime Fusion specializes in the development and construction of high-temperature superconducting (HTS) fusion reactors. | $4.5M | Seed | Nov 24, 2025 |  |
| Luminal | Luminal provides a machine learning compiler and serverless cloud platform that automates PyTorch model optimization and deployment. | $5.3M | Seed | Nov 17, 2025 |  |

10 of 86 investments shown.

## Co-investors
- [Y Combinator](https://shizune.co/investors/profile/y-combinator) — VC Fund, 42 deals together
- [SV Angel](https://shizune.co/investors/profile/sv-angel) — VC Fund, 18 deals together
- [Liquid 2 Ventures](https://shizune.co/investors/profile/liquid2-ventures) — VC Fund, 12 deals together
- [Pioneer Fund](https://shizune.co/investors/profile/pioneer-fund) — VC Fund, 11 deals together
- [General Catalyst](https://shizune.co/investors/profile/general-catalyst-partners) — VC Fund, 10 deals together
- [Felicis](https://shizune.co/investors/profile/felicis-ventures) — VC Fund, 7 deals together

## About Yahoo! Small Business

VC Fund · Sunnyvale, United States

Yahoo! Store is a web-based application. It was previously called Viaweb before Yahoo! Inc. bought it for 455,000 shares of Yahoo! stock. It operates as a maker of tools for building and operating e-commerce sites. The company was founded in 1995 by Paul Graham, Robert Morris, and Trevor Blackwell.

3 contacts available at Yahoo! Small Business.

| Name | Title | Profile |
| --- | --- | --- |
| Paul Graham | Co-Founder | https://shizune.co/investors/profile/paul-graham |
| Robert Morris | Co-Founder | https://shizune.co/investors/profile/robert-morris |
| Vicent Partal | Managing Editor | https://shizune.co/investors/profile/vicent-partal |

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## FAQ

### What does Paul Graham invest in?

Paul Graham invests primarily in Software, Artificial Intelligence and SaaS startups, most often at Seed and Series A stage. Most of the 86 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### What is Paul Graham's check size?

Paul Graham typically joins rounds of $1M–$9.5M at Seed, $70k–$700k at Angel and $3.5M–$30M at Series A. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Paul Graham participates in.

### When did Paul Graham last invest?

The most recent investment recorded for Paul Graham closed in Aug 2026. Shizune tracks 86 investments in total for this profile, including round sizes, stages and portfolio companies, all sourced from confirmed public funding rounds and refreshed monthly.

### Is Shizune's investor data accurate?

Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Aug 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.

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