# Tuomas Artman

> Tuomas Artman is a seed investor at Linear (San Francisco) backing Software and Mobile Apps. See 6 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [Linear](https://shizune.co/investors/profile/linear-app)
- Location: San Francisco, United States
- Total investments: 6
- Last investment: Sep 2025
- Lead investor: 0%
- Last updated: Aug 2026
- LinkedIn: http://www.linkedin.com/in/tuomasartman
- X (Twitter): https://twitter.com/artman/
- Website: https://x.com/artman/

Tuomas Artman is a Co-Founder at Linear.

## Round sizes

| Stage | Round size |
| --- | --- |
| Seed | $2.1M–$3M |

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Software | 4 | 67% |
| Mobile Apps | 2 | 33% |
| Developer Tools | 2 | 33% |
| Artificial Intelligence | 2 | 33% |
| A/B Testing | 1 | 17% |

12 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 4 | 67% |
| Pre-Seed | 1 | 17% |
| Series A | 1 | 17% |

### Country

| Country | Investments | Share |
| --- | --- | --- |
| United States | 3 | 50% |
| Finland | 1 | 17% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Time Atlas Labs | Time Atlas Labs is a Finnish-US technology startup that builds Time Atlas, a privacy-first mobile app. | $2.1M | Seed | Sep 17, 2025 |  |
| Gentrace | Gentrace is a test and production evaluation for companies building generative AI at scale that improves the quality, safety, and compliance of LLM outputs. Its end-to-end solution platform encompasses a purpose-built testing environment that models real-world applications and comprehensive analytics to assess AI model performance. | $8M | Series A | Dec 10, 2024 |  |
| GsmBD.co | Rise is a next-generation calendar that helps you make time for the things that matter most. | $3M | Seed | Jan 18, 2022 |  |
| Mobile.dev | mobile.dev is setting a new standard for mobile development, empowering all companies to deliver high-quality mobile applications. | $3M | Seed | Jul 14, 2021 |  |
| Maestro | Maestro is an open-source automated testing platform that enables developers to create and run end-to-end UI tests for Android, iOS, and web applications using simple YAML-based workflows. The platform supports cross-platform test automation, CI/CD integration, cloud execution, and AI-assisted testing to help engineering teams improve softwarequality and streamline quality assurance processes. | $3M | Seed | Jul 14, 2021 |  |
| Rise | Find time for what’s important | $3M | Pre-Seed | Jan 18, 2021 |  |

6 of 6 investments shown.

## Co-investors
- [Cowboy Ventures](https://shizune.co/investors/profile/cowboy-ventures) — VC Fund, 2 deals together
- [Forum Ventures](https://shizune.co/investors/profile/forumventures) — VC Fund, 2 deals together
- [Kersvers](https://shizune.co/investors/profile/kersvers-46ec) — VC Fund, 2 deals together
- [Headline](https://shizune.co/investors/profile/headlinevc) — VC Fund, 1 deal together
- [K9 Ventures](https://shizune.co/investors/profile/k9-ventures) — VC Fund, 1 deal together
- [Karman Ventures](https://shizune.co/investors/profile/karman-ventures) — VC Fund, 1 deal together

## About Linear

VC Fund · San Francisco, United States

Linear allows the user to manage software development and track bugs. Built for speed and efficiency.The founders started Linear from their own frustrations building software projects in successful high-growth companies like Airbnb, Coinbase and Uber. The founders wanted to create the tools that focus us and its team in making progress, not getin the way. Tools that are fast and efficient. Speed and performance were the main things Linear focuses on early on and keep focusing on that.

5 contacts available at Linear.

| Name | Title | Profile |
| --- | --- | --- |
| Casey Bertenthal | Head Of Sales | https://shizune.co/investors/profile/casey-bertenthal |
| Jori Lallo | Co-Founder | https://shizune.co/investors/profile/jori-lallo |
| Karri Saarinen | CEO & Co-founder | https://shizune.co/investors/profile/karri-saarinen |
| Tuomas Artman | Co-founder and CTO | https://shizune.co/investors/profile/tuomas-artman |
| Cristina Cordova | COO | https://shizune.co/investors/profile/cristina-cordova |

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### Similar stage
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### Similar country
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## Featured in investor lists
- [Mobile Apps Angel Investors in Finland](https://shizune.co/investors/mobile-apps-angel-investors-finland)
- [Mobile Angel Investors in Finland](https://shizune.co/investors/mobile-angel-investors-finland)

## FAQ

### What does Tuomas Artman invest in?

Tuomas Artman invests primarily in Software, Mobile Apps and Developer Tools startups, most often at Seed and Pre-Seed stage. Most of the 6 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 Tuomas Artman's check size?

Tuomas Artman typically joins rounds of $2.1M–$3M at Seed. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Tuomas Artman participates in.

### When did Tuomas Artman last invest?

The most recent investment recorded for Tuomas Artman closed in Sep 2025. Shizune tracks 6 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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