# David Mytton

> David Mytton is a seed investor at Arcjet (London) backing Software and Developer Tools. See 30 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [Arcjet](https://shizune.co/investors/profile/arcjet)
- Location: London, United Kingdom
- Total investments: 30
- Last investment: Feb 2026
- Lead investor: 0%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/davidmytton
- X (Twitter): https://twitter.com/davidmytton
- Website: https://davidmytton.blog

David Mytton is a seed investor at Arcjet in London focused on Software and Developer Tools. David Mytton is currently building Arcjet, a product to help developers protect their apps. He also writes the console.dev weekly devtools newsletter which reviews the most interesting tools for developers.In the past, he co-founded Server Density, a cloud infrastructure monitoring startup which was acquired in 2018 by edge computing platform,StackPath.

## Round sizes

| Stage | Round size |
| --- | --- |
| Seed | $2M–$5.5M |
| Pre-Seed | $125k–$2.3M |
| Series A | $15M–$25M |

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Software | 18 | 60% |
| Developer Tools | 8 | 27% |
| Information Technology | 6 | 20% |
| Cloud Infrastructure | 4 | 13% |
| SaaS | 3 | 10% |

44 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 15 | 50% |
| Pre-Seed | 7 | 23% |
| Series A | 3 | 10% |
| Series B | 1 | 3% |
| Equity Crowdfunding | 1 | 3% |

### Country

| Country | Investments | Share |
| --- | --- | --- |
| United States | 11 | 37% |
| United Kingdom | 8 | 27% |
| Germany | 2 | 7% |
| Israel | 1 | 3% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Command Code | Langbase helps developers ship composable AI agents with hyper-personalized memory (RAG).Langbase is the composable AI infrastructure and developer experience to build, collaborate, and deploy any AI agents (AI features). Our mission is to make AI accessible to everyone, any developer not just AI/ML experts. We are the only composable AIinfrastructure. That's all we do. | $5M | Seed | Feb 25, 2026 |  |
| Superstream | Memphis.dev is an open-source, next-generation alternative to traditional streaming engines. It accelerates the development of real-time applications that require large volumes of streamed and enriched data, multiple protocols, and with minimum platform operations. Highly resilient, distributed architecture, cloud-native, and run on any Kubernetes,on any cloud without zookeeper, bookeeper, or JVM. | $5.5M | Seed | Jun 28, 2023 |  |
| Rowy | Rowy brings a no-code like ease to building any product’s backend functionality with the ability to manage a database as easily as using a spreadsheet. Rowy also allows developers to retain full coding extensibility anytime they need it on a scalable cloud platform like Google Cloud. This allows users to build any ambitious or complex idea withoutlimits. | $3M | Seed | Dec 05, 2022 |  |
| Steadybit | Your business deserves the best possible preventive action, no matter how complex your system-landscape is. steadybit adds that little extra certainty to your development and testing-workflow. Easy to install. Choose between SaaS or on-prem. | $5M | Seed | Sep 22, 2022 |  |
| Cloudquery | CloudQuery is the open-source cloud asset inventory powered by SQL. | $15M | Series A | Jun 22, 2022 |  |
| Spacedrive | Spacedrive is an open source cross-platform file explorer, powered by a virtual distributed filesystem written in Rust. Combine your drives and clouds into one database that you can organize and explore from any device. Designed for creators, hoarders and the painfully disorganized. | $2M | Seed | Jun 13, 2022 |  |
| Railway | Import Infrastructure No Docker. No AWS. No Kubernetes Just Code | $20M | Series A | May 31, 2022 |  |
| Cyscale | At Cyscale, we believe that a safer Cloud means a safer World. We need to do something extraordinary to have a better, easier and more secure way of designing & deploying any Cloud Infrastructure in AWS, Azure, GCP, OpenStack, VMWare, IBM Cloud, Oracle Cloud and even Alibaba Cloud.That is why we create amazing tools so that everybody canbuild & deploy cloud infrastructure with security in mind, knowing the costs upfront, while maintaining continuous regulatory compliance. All done automatically with just a few clicks.We are the first Cloud Management, Security and Compliance company empowering both regular people and cloud professionals with visual tools to meet this level of cloud automation and security.We're Cyscale, born in the Cloud to protect the Cloud!Join our team or pre-register for the product launch: https://cyscale.com | $3.2M | Seed | May 19, 2022 |  |
| Cased | The modern terminal for teams & platform for production work |  | Seed | Apr 14, 2022 |  |
| Trunk | Redefining developing software at scale | $25M | Series A | Apr 04, 2022 |  |

10 of 30 investments shown.

## Co-investors
- [Seedcamp](https://shizune.co/investors/profile/seedcamp) — VC Fund, 7 deals together
- [Y Combinator](https://shizune.co/investors/profile/y-combinator) — VC Fund, 5 deals together
- [boldstart ventures](https://shizune.co/investors/profile/boldstart-ventures) — VC Fund, 4 deals together
- [Angel Invest](https://shizune.co/investors/profile/angel-invest-ventures) — VC Fund, 3 deals together
- [Amaranthine](https://shizune.co/investors/profile/amaranthine-partners) — VC Fund, 2 deals together
- [Angular Ventures](https://shizune.co/investors/profile/angular-ventures) — VC Fund, 2 deals together

## About Arcjet

VC Fund · San Francisco, United States

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.

1 contacts available at Arcjet.

| Name | Title | Profile |
| --- | --- | --- |
| David Mytton | Founder | https://shizune.co/investors/profile/david-mytton |

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## FAQ

### What does David Mytton invest in?

David Mytton invests primarily in Software, Developer Tools and Information Technology startups, most often at Seed and Pre-Seed stage. Most of the 30 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 David Mytton's check size?

David Mytton typically joins rounds of $2M–$5.5M at Seed, $125k–$2.3M at Pre-Seed and $15M–$25M 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 David Mytton participates in.

### When did David Mytton last invest?

The most recent investment recorded for David Mytton closed in Feb 2026. Shizune tracks 30 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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