What stage does OpenCore Ventures invest at?

OpenCore Ventures invests at Pre-Seed, Seed stages.

What check size does OpenCore Ventures write?

InvestorMatch does not have a recorded check size for OpenCore Ventures. Its stage focus (Pre-Seed, Seed) is the best available signal for round size.

What sectors does OpenCore Ventures invest in?

OpenCore Ventures invests in Enterprise, Developer Tools, AI / ML.

Who are the partners at OpenCore Ventures?

Partners at OpenCore Ventures include Sid Sijbrandij (Founder), Betty Ma (Chief Operating Officer).

What has OpenCore Ventures invested in recently?

OpenCore Ventures has 19+ portfolio companies, including Mermaid, Superserve, Stirling PDF, Authentik, Valkey.

How much capital does OpenCore Ventures manage?

InvestorMatch does not have a recorded AUM figure for OpenCore Ventures.

OpenCore Ventures — Pre-Seed & Seed VC Firm

Website

OpenCore Ventures is a Pre-Seed, Seed venture capital firm investing in Enterprise, Developer Tools, AI / ML. The firm has 19 portfolio companies in our records.

Portfolio: 19 companies on record
Partners: 2 listed
Stage: Pre-Seed, Seed
Sectors: Enterprise, Developer Tools, AI / ML
Check size: Not in our records
AUM: Not in our records

Last verified: 2026-11-12

How to approach: cold outreach ok

Stage

Pre-Seed, Seed

Portfolio

19+ companies

Team

2 partners

Investment Thesis

Emerging fund backing software infrastructure, developer tools, and AI products. Good fit for systems that encode expert judgment into software workflows.

How OpenCore Ventures invests

OpenCore Ventures is a vc firm. The firm invests at the Pre-Seed, Seed stages, with a focus on Enterprise, Developer Tools, AI / ML.

OpenCore Ventures has backed 19 companies in our records, including Mermaid, Superserve, Stirling PDF.

Partners & Team

Sid Sijbrandij

Founder

Open source

Venture-scale open core businesses

Founded Open Core Ventures, built on the conviction that the most important software companies are taking shape in the open source community. Author of the essay 'Building venture-scale open core.'

Betty Ma

Chief Operating Officer

Industry Focus

Invests In

Enterprise

Developer Tools

AI / ML

Portfolio Companies (19)

Other

Mermaid

Creator & Co-founder

Superserve

Founder & CTO

Stirling PDF

Creator & Founder

Authentik

Infrastructure / Identity·Not stated in source[1][2]

Open-source identity and access management platform

Valkey

Infrastructure / Databases·Not stated in source[1][2]

Open-source key-value database / cache project

Open WebUI

AI / Developer tools·Not stated in source[1][2]

Open-source web UI for interacting with LLMs

Duplicati

Infrastructure / Backup·Not stated in source[1][2]

Open-source backup software

osquery / Fleet

Security / Endpoint management·Not stated in source[1][2]

Open-source endpoint visibility / device management tools

Node-RED

Developer tools / Automation·Not stated in source[1][2]

Flow-based low-code programming tool for wiring devices, APIs, and services

GrapesJS

Developer tools / Web authoring·Not stated in source[1][2]

Open-source web builder framework

How to pitch OpenCore Ventures

•Raising at Pre-Seed, Seed? You're squarely in their sweet spot.
•Lead with your fit in Enterprise, Developer Tools, AI / ML — the sectors they actively back.
•cold outreach ok
•Address your outreach to a specific partner, such as Sid Sijbrandij, Founder.
•A warm introduction beats a cold email. Get matched and request an intro.