Nuclei
Nuclei is an open-source, template-based vulnerability scanner by ProjectDiscovery. Run community-written YAML templates to find security issues across web apps, networks, DNS, SSL, and more. Thousands of templates maintained by the community.
- Location
- Bengaluru, India
- Raised
- $25M
- Stage
- Series A
- Founded
- 2020
- Category
- Open Source
- Funding
- VC-backed
- Team
- 50-100
Funding figures as of Jul 2025 · not independently verified
Founders of Nuclei
- Sandeep Singh
- Shubham Sharma
Investors backing Nuclei
- Felicis Ventures
- CRV
Frequently asked questions
What does Nuclei do?
Nuclei is an open-source, template-based vulnerability scanner by ProjectDiscovery. Run community-written YAML templates to find security issues across web apps, networks, DNS, SSL, and more. Thousands of templates maintained by the community.
Where is Nuclei based?
Nuclei is based in Bengaluru, India.
When was Nuclei founded?
Nuclei was founded in 2020.
How much has Nuclei raised?
Nuclei has raised $25M in their Series A round as of Jul 2025.
Who founded Nuclei?
Nuclei was founded by Sandeep Singh, Shubham Sharma.
Who has invested in Nuclei?
Nuclei is backed by Felicis Ventures, CRV.
How Nuclei would pitch themselves
○ Auto-generated01Target customer
Developers + open-source communities + enterprises wanting an OSS-first tool in this category, with optional commercial support.
02Problem they solve
Nuclei is an open-source, template-based vulnerability scanner by ProjectDiscovery. Run community-written YAML templates to find security issues across web apps, networks, DNS, SSL, and more. Thousands of templates main… The category has historically been served by tools that miss the modern workflow this product is built around.
03Key differentiator
Nuclei differentiates on fast and customizable vulnerability scanner. Backed by Felicis Ventures + CRV, $25M raised — the company has resources + validation to compound this thesis. Founded by Sandeep Singh + team.
04Go-to-market strategy
Series-A scaling stage — building outbound sales motion, hiring first AEs, layering on customer success. Mix of PLG (where the product allows) + direct sales for higher-ACV deals.