Deciso

About Deciso

We are the proud software and hardware developers of the best-in-class Open Source firewall solution OPNsense.

Based in the Netherlands, our team of software and hardware developers provides top-tier security solutions that ensure peace of mind in your digital domain.

We are committed to transparency. We believe in sharing knowledge, giving back to the community, and upholding the principles of true open source. Our OPNsense product range is a testament to this statement. OPNsense is a True Open Source firewall solution. Our products are continuously tested, developed and supported by a large and involved community, making it the best and most widely supported firewall solution out there.

We foster collaboration and thought-leadership through a community-driven approach. Our focus on support and guidance ensuring our users have access to the latest innovations and information.

We stand at the core of your digital defense strategy. Together, we create a safe digital space for everyone.

Address

• Headquarters

  MiddelharnisZuid-Holland, Netherlands

Team by function

Based on 6 public job profiles as of 3 September 2026.

• Executive / C-Suite2
• Consulting / Advisory1
• Engineering / Software Development1
• Marketing1
• Sales1