đź‘‹ About Me
I'm Oliver Sild — a tech entrepreneur from Pärnu, Estonia, working to make the open-source world more secure, transparent, and resilient.
I’m the co-founder and CEO of Patchstack, a cybersecurity company helping developers and organizations secure their open-source code at scale. But more than just building software, I’ve always been driven by a deeper mission: to empower developers with the tools and knowledge they need to make the internet safer for everyone.
🛡️ My Work in Cybersecurity
Open-source software powers the internet, but it also faces a constant wave of security challenges. At Patchstack, we’ve helped disclose over 10,000+ security vulnerabilities (CVEs) in plugins, components, and frameworks used by millions. We coordinate responsible disclosure, run VDPs, and help developers meet new standards like the EU Cyber Resilience Act.
Patchstack started as a small idea on Reddit. Today, it’s a globally trusted platform — thanks to the incredible team behind it and a worldwide community of ethical hackers known as the Patchstack Alliance.
đź’ˇ What I Believe
I believe in:
- Open collaboration over closed systems
- Empowering individuals through education and tools
- Community-driven innovation as the future of security
That’s why we’re building tools that democratize access to world-class security, especially for indie plugin developers and smaller teams who need it most.
🌍 My Roots
I still live in my hometown of Pärnu, where I started my journey as a curious kid, a skater, and a self-taught builder. Over the years, I’ve helped launch co-working hubs, support local startups, and build a tech ecosystem from the ground up.
In 2025, I was humbled to receive a state decoration for my work in digital entrepreneurship and for strengthening the foundations of Estonia’s startup scene.
🤝 Let’s Connect
Whether you're an open-source developer, a founder, or just someone curious about cybersecurity, I’d love to connect. You can follow my writing on this site or reach out via Twitter or LinkedIn.
Helping to secure open-source and build communities — that’s what I’m here for.
🫀 Things I’m proud of
TOP 5 Young Entrepreneur in Estonia (2020) - I was selected as one of the TOP 10 nominates for the young entrepreneur of the year (2020) in Estonia.
Winner of Salto Growth Camp (2020) - I participated in a startup competition where Patchstack received first place, and I was voted second place as the most helpful founder in the programme.
Young Entrepreneur Of The Year (2019 - Pärnu, Estonia) - In 2019 I received a title of “Young entrepreneur of the year” in Pärnu, Estonia.
Brave Entrepreneur Of The Year (2019 - Pärnu, Estonia) - In 2019 I received a title of “Brave entrepreneur of the year” in Pärnu, Estonia. The recoqnition was given by Luminor Bank.
Alumni of Cylon Accelerator (2017) - WebARX (now Patchstack) was selected of the top 10 from 1000 early-stage cyber-security startups in the world to be part of the intensive 3-month business accelerator in London, UK.
Alumni of Tehnopol Startup Incubator (2017) - WebARX (now Patchstack) graduated from the Tehnopol Startup Incubator by leaving for Cylon Accelerator and raising its first investment.
3rd place at JIC Starcube Competition (2015) - my idea was selected of the top 10 early-stage startups to be part of an intensive 3-month ICT startup competition/accelerator in Brno, Czech Republic.
🍓 Things I’ve done
Welcome Patchstack! (2021) - We merged WebARX and Plugbounty and launched a vulnerability database for WordPress plugins. We also started partnerships with some of the largest hosting companies in the world.
Hackerspace Pärnu (2020) - CTF Pärnu NGO opened the first Hackerspace in Pärnu, Estonia, where cyber-security enthusiasts can learn, practice and come together.
CTF Pärnu (2018) - Co-founded an NGO which organizes cyber-security capture the flag events all over Estonia. Later opened the first Hackerspace in Pärnu, Estonia.
Plugbounty (2019) - Part of WebARX, but is a standalone platform where ethical hackers can report security vulnerabilities inside open-source web application components.
WebARX (2017) - A security company focused on web application security. Even though, I was playing with the idea of this company starting from 2015, it was formally set up in the end of 2017 in London, UK.
Forwardspace Co-working Space (2017) - Opened the first co-working space in Pärnu, Estonia. Over the years, it has become the centre of the local start-up and tech community.
ESEC Solutions (2014) - My first company, which we built with a classmate to build websites and help businesses whose websites were hacked.
⚡️ Where I’ve volunteered
University of Tartu Pärnu College - In 2019 I was invited to the advisory board of a local university in Pärnu, Estonia.
Pärnumaa Vocational Education Centre - In late 2019 and early 2020, I helped local ICT teachers to combine ICT Security Specialist programme based on secondary education. Starting from September 2020 students can now officially learn to become ICT Security Specialist at PVEC.
Red Cross Youth - When I was ~16, I was selected to be a youth group leader in Red Cross. We provided first-aid at sports events and helped police with searching missing people.