# Thomas Mann

> Thomas Mann is a seed investor in London backing Software and Developer Tools. See 5 investments, round sizes, portfolio and contact details. Updated Oct 2026.

- Type: Angel Investor
- Location: London, United Kingdom
- Total investments: 5
- Last investment: Jun 2025
- Lead investor: 0%
- Last updated: Oct 2026
- LinkedIn: https://www.linkedin.com/in/thomas-paul-mann-5183101a4/

Thomas Mann is a seed investor in London focused on Software and Developer Tools. Thomas Paul Mann is the CEO and Founder at Raycast.

## Contacts

5 contacts available for Thomas Mann: work email, personal email, work phone, personal phone and socials. Sign up free to unlock them: https://app.shizune.co/sign-up/investor-profiles/find-email/thomas-mann?utm_source=investor_profile

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Software | 3 | 60% |
| Developer Tools | 2 | 40% |
| Security | 1 | 20% |
| Open Source | 1 | 20% |
| Cyber Security | 1 | 20% |

10 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 4 | 80% |
| Series A | 1 | 20% |

### Country

| Country | Investments | Share |
| --- | --- | --- |
| United States | 3 | 60% |
| Sweden | 1 | 20% |
| United Kingdom | 1 | 20% |

## Investments

| Company | Description | Round size | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Polar | Polar is a subscription network for open-source maintainers and backers. Polar also provides tools that enable data processing and data integration. Polar was founded in 2022 and was headquartered in Stockholm, Sweden. | $10M | Seed | Jun 18, 2025 | https://polar.sh |
| Alloy | Index offers collaborative planning for high-growth technology companies. | $2.2M | Seed | Feb 11, 2025 | https://www.index.inc |
| Arcjet | Arcjet helps developers protect their apps in just a few lines of code. Implement rate limiting, bot protection, email validation, and defense against common attacks. | $3.6M | Seed | Sep 10, 2024 | https://arcjet.com |
| Knock | Knock helps product and engineering teams send notifications to their customers. | $12M | Series A | Feb 15, 2024 | https://knock.app |
| Plain | Plain, a new startup that wants to reinvent support tools. While the customer support space is a competitive industry with big tech companies like Intercom and Zendesk, Plain believes it has a different approach as it focuses on API integrations to make your company’s product and your support platform work hand in hand. | $6M | Seed | Nov 09, 2022 | https://plain.com/ |

5 of 5 investments shown.

## Co-investors
- [MKT1 Capital](https://shizune.co/investors/profile/mkt1) — VC Fund, 3 deals together
- [Bain Capital Ventures](https://shizune.co/investors/profile/bain-capital-ventures) — VC Fund, 2 deals together
- [Craft Ventures](https://shizune.co/investors/profile/craft-ventures) — VC Fund, 2 deals together
- [Accel](https://shizune.co/investors/profile/accel) — VC Fund, 1 deal together
- [Afore Capital](https://shizune.co/investors/profile/afore-capital) — VC Fund, 1 deal together
- [Andreessen Horowitz](https://shizune.co/investors/profile/andreessen-horowitz) — VC Fund, 1 deal together

## Similar investors

### Similar stage
- [Antler](https://shizune.co/investors/profile/antler-be9c) — VC Fund
- [Right Side Capital Management](https://shizune.co/investors/profile/right-side-capital-management) — VC Fund
- [Alumni Ventures](https://shizune.co/investors/profile/alumni-ventures-group) — VC Fund

## FAQ

### What does Thomas Mann invest in?

Thomas Mann invests primarily in Software, Developer Tools and Security startups, most often at Seed and Series A stage. Most of the 5 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### How do I contact Thomas Mann?

Public channels for Thomas Mann include LinkedIn. For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.

### When did Thomas Mann last invest?

The most recent investment recorded for Thomas Mann closed in Jun 2025. Shizune tracks 5 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 Oct 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.

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