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Avast security software products are developed for Microsoft Windows, Mac OS X, Android and Linux users by AVAST Software.

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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?
Website, pricing, platforms and company facts side by side.
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|---|---|---|
| Website | avast.com | nullsquare.net |
| Pricing | — | |
| Company | Startup from the Czech Republic | — |
| Listed in |
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
Avast is recommended for individuals and small businesses looking for a comprehensive security solution that is easy to use and offers a variety of features. It is suitable for users who need basic to advanced protection and are looking for both free and paid options, depending on their specific requirements.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Avast Free Antivirus Review | Tested vs Malware
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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Avast 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 Avast 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.


As well as a firewall for all devices, Avast Premium Security also protects anti-ransomware protection, file encryption, and file shredder options. There are also anti-phishing and anti-fraud protections for safer...
Sure, using Avast does come with a lot of perks, but like any other software, Avast has its own drawbacks. For me, one of the biggest challenges with Avast is that it can slow your PC down.
What's even better is that not only are Avast's basic products free, but they are also available for mobile devices as well as for desktops, which makes Avast a particular ideal choice if you have multiple devices you...
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