
Nessus
Intruder
Acunetix
Burp Suite
Netsparker
Acunetix Vulnerability Scanner
Invicti (formerly Netsparker)
The Open Vulnerability Assessment System (OpenVAS) is a framework of several services and tools...

1Password
bitwarden
BotGauge
BugBot
Bugsnap AI
have i been pwned?
PromptGuard
Continuous AI security testing for apps, APIs, cloud, and private environments — review findings, reports, and live agent activity in one place.
Which is more popular?
Based on our record, OpenVAS seems to be more popular. It has been mentioned 6 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | openvas.org | nullsquare.net |
| Pricing | — | |
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What each product offers, as listed by its team.


Possible disadvantages
Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
OpenVAS is ideal for small to medium-sized organizations looking for a cost-effective vulnerability scanning solution. It's also suitable for cybersecurity professionals who have the technical expertise to configure and maintain the scanner, as well as enthusiasts or students who are keen on learning more about vulnerability management using open-source tools.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
How to find Exploits with OpenVAS
More videos
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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing OpenVAS and NULLSQUARE.
NULLSQUARE's answer:
Our primary audience consists of fast-growing tech startups and SMBs with 1–100 employees. The best-fit industries are SaaS, Fintech, and E-commerce. Our target champions are technical and executive leaders, specifically CTOs, CEOs, Founders, VPs of Engineering, and Heads of Engineering. Geographically, we focus on the MENA region (Jordan, UAE, Saudi Arabia, Egypt) and global English-speaking markets (USA, UK, Europe).
NULLSQUARE's answer:
NullSquare operates on an internal runner architecture deployed inside the customer's own network. We utilize Docker sandboxing to isolate every scan in a container that is destroyed immediately upon completion. The platform relies on AI agents to run automated black-box and white-box penetration testing across web applications, APIs, and cloud infrastructure. Additionally, we leverage GitHub integrations to provide automated security reviews on every pull request.
NULLSQUARE's answer:
NullSquare provides a superior alternative across several competitive dimensions:
Vs. Traditional Pentest Firms: Traditional firms charge $10,000–$30,000 and take 3–6 weeks. NullSquare is 10–100x faster, offering findings the same day at a fraction of the cost.
Vs. Manual Scanners (ZAP, Nessus): Scanners output raw, unvalidated data and require expert operators. NullSquare provides a complete platform with validated findings and automated compliance output.
Vs. Enterprise AI (XBOW): XBOW requires enterprise engagement and lacks public pricing. NullSquare is built for startups, featuring instant accessibility, a free assessment on signup, and transparent reports in minutes.
Vs. Open Source (Strix): Strix requires the customer to run and maintain the platform themselves. NullSquare provides a fully managed platform.
NULLSQUARE's answer:
As a company founded in 2026, we are an early-stage startup actively acquiring our first customers. We strictly do not target enterprises with 500+ employees. Instead, our ideal customer profile focuses on fast-growing startups within specific verticals:
SaaS and Tech companies
Fintech startups
E-Commerce businesses
NULLSQUARE's answer:
NullSquare’s architecture guarantees stronger data privacy than any SaaS competitor through our internal private runner. Agents run directly inside the customer's own infrastructure within isolated Docker sandboxes. These sandboxes are destroyed immediately upon completion, ensuring customer code and scan data never persist on NullSquare's servers. Furthermore, NullSquare’s AI agents confirm exploitability before reporting, ensuring customers receive proven vulnerabilities instead of false positive noise. Every scan also automatically generates built-in compliance evidence for SOC2, ISO27001, HIPAA, and PCI-DSS.
NULLSQUARE's answer:
Founded in Jordan in 2025, NullSquare was built to address a massive gap in the security market. The industry is shifting from periodic manual pentests to continuous automated security testing. However, early-stage startups and SMBs are heavily underserved—they face the exact same compliance deadlines and investor pressures as large corporations, but cannot afford the $10,000+ price tags of enterprise tools or consulting firms. NullSquare was created to give these fast-growing teams the capability of a dedicated security engineer at a fraction of the cost.
Share your experience with using OpenVAS and NULLSQUARE. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


The primary reason businesses use OpenVas is to perform comprehensive security testing of their IP addresses. This tool performs a port scan of an IP address to find any open services. Once listening services are...
It is an open vulnerability assessment system is a software framework of services and tools offering vulnerability scanning and vulnerability assessment. The aim of OpenVAS protocol ia to be well documented to assist...
Verdict: OpenVAS is an open-source web application security scanner that will help you accurately detect vulnerabilities. It is easily configurable and can be tuned accordingly if you want to perform large-scale...
We have no reviews of NULLSQUARE yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


Otherwise your on the right path checkout the open source Greenbones OpenVAS (this was Nessus before they closed source and became corporate) or Project Discovery Nuclei. Source: over 3 years ago
Personally, I was lucky enough to get a license to Nessus for my own scanning, however you can use OpenVAS for some free to scan. Scanners aren't 100% correct no matter where you go but it'll give you some things to look at. OpenVAS. Source: over 4 years ago
Https://openvas.org/ OpenVAS is free and fairly capable. It might struggle cpu on a pi... Might need quite a bit of ram, but I'm hoping you've got some beefier kit in your stack. Source: over 4 years ago
Tracking NULLSQUARE since Jun 2026.
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