Sytse Sijbrandij
Founder and General Partner @ Open Core Ventures
San Francisco, United States
Sytse Sijbrandij is a seed investor at Open Core Ventures in San Francisco focused on Software and SaaS. Sytse Sijbrandij is the Co-Founder and Executive Chair of GitLab. He previously worked at Comcoaster as a Founder. Sytse Sijbrandij attended the University of Twente.
- Total investments:
- 11
- Last investment:
- Lead investor:
- 27%
Last updated:
For AI agents: llms.txt
Industries Sytse Sijbrandij invests in
Stages Sytse Sijbrandij invests in
Countries Sytse Sijbrandij invests in
Round sizes
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Round size
- Seed
- $5M–$11M
- Grant
- $2M–$2M
- Series A
- $20M–$27M
Investment Focus
Industry
- Software 4 (36%)
- SaaS 2 (18%)
- Data Visualization 2 (18%)
- Information Technology 2 (18%)
- Solar 1 (9%)
Stage
- Seed 5 (45%)
- Series A 3 (27%)
- Grant 2 (18%)
- Series B 1 (9%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| Fleet builds open source software to manage and secure computing infrastructure: employee laptops, cloud servers, and more. Our technology helps IT and security teams build trust within their organization, while getting their jobs done more effectively. | $27M / Series B / Jun 17, 2025 | ||
| Swift Solar is a company focused on developing advanced solar technology. The company's core innovation is perovskite solar cells, designed to be more efficient and affordable than traditional solar panels. Swift Solar emphasizes domestic manufacturing and abundant raw materials to ensure scalability. | $27M / Series A / Jun 12, 2024 | ||
| Building the next generation of smart diagramming for enterprise teams. Easily create and collaborate on complex diagrams from text. | $7.6M / Seed / Mar 20, 2024 | ||
| Mermaid Chart, founded by Knut Sveidqvist and Open Core Ventures, emerged from the Mermaid open-source project. Lead developers from Mermaid have joined, strengthening the project's connection. Mermaid Chart bolsters open-source Mermaid development, enabling professional usage, while maintaining open-source functionality. It supports Mermaidsignificantly, but also offers commercial services to fund project growth and expand the developer team. | $7.6M / Seed / Mar 20, 2024 | ||
| Pano offers hardware and software technology solutions for fire professionals to detect threats. Pano provides tools to the government, utilities, insurers, and private landowners in order to mitigate wildfire threats and protect lives, property, and the environment. Pano is a unified enterprise solution that combines cutting-edge hardware,artificial intelligence, and software. | $20M / Series A / Sep 19, 2022 | ||
| Fleet builds open source software to manage and secure computing infrastructure: employee laptops, cloud servers, and more. Our technology helps IT and security teams build trust within their organization, while getting their jobs done more effectively. | $20M / Series A / Apr 28, 2022 | ||
| $1 a day of basic income for everyone. We’re building a new cryptocurrency to be used as digital money, with the goal of reducing poverty worldwide. Read more on globalincomecoin.com | $2M / Grant / Apr 28, 2022 | ||
| Glo is the anti-poverty version of the dollar. The currency that lifts people out of extreme poverty. Glo is a completely new style of philanthropy. Join the movement. | $2M / Grant / Apr 28, 2022 | ||
| Fleet builds open source software to manage and secure computing infrastructure: employee laptops, cloud servers, and more. Our technology helps IT and security teams build trust within their organization, while getting their jobs done more effectively. | $5M / Seed / Jan 20, 2022 | ||
| Swift Solar is a company focused on developing advanced solar technology. The company's core innovation is perovskite solar cells, designed to be more efficient and affordable than traditional solar panels. Swift Solar emphasizes domestic manufacturing and abundant raw materials to ensure scalability. | $8.2M / Seed / Dec 14, 2020 | ||
| See all 11 investments → | |||
Co-Investors
About Open Core Ventures
Open Core Ventures is a financial firm that offers venture capital, investments, business development, private equity, and consulting.
Open Core Ventures Contacts
| Name | Phone | Socials | |
|---|---|---|---|
Betty Ma
COO
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Sytse Sijbrandij
Founder and General Partner
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FAQ
What does Sytse Sijbrandij invest in?
Sytse Sijbrandij invests primarily in Software, SaaS and Data Visualization startups, most often at Seed and Series A stage. Most of the 11 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 Sytse Sijbrandij's check size?
Sytse Sijbrandij typically joins rounds of $5M–$11M at Seed, $2M–$2M at Grant and $20M–$27M 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 Sytse Sijbrandij participates in.
How do I contact Sytse Sijbrandij?
Public channels for Sytse Sijbrandij include LinkedIn, X (Twitter) and Facebook. 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 Sytse Sijbrandij last invest?
The most recent investment recorded for Sytse Sijbrandij closed in Jun 2025. Shizune tracks 11 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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