# Nessus Professional vs Start Left® Security - Product-Centric VM: side-by-side comparison (2026) [Nessus Professional](https://cybersectools.com/tools/nessus-professional) is a commercial [vulnerability assessment](https://cybersectools.com/categories/vulnerability-assessment) solution by [Tenable](https://cybersectools.com/companies/tenable). [Start Left® Security - Product-Centric VM](https://cybersectools.com/tools/start-leftr-security-product-centric-vm) is a commercial [vulnerability assessment](https://cybersectools.com/categories/vulnerability-assessment) solution by [Start Left® Security](https://cybersectools.com/companies/start-leftr-security). Features, integrations, deployment and the company behind each one, side by side. ## Side-by-side comparison | | Nessus Professional | Start Left® Security - Product-Centric VM | |---|---|---| | Pricing model | Commercial | Commercial | | Category | Vulnerability Assessment | Vulnerability Assessment | | Verified | No | No | | Deployment type | On-Premises | Cloud | | Company size fit | Startup, SMB, Mid-Market, Enterprise | SMB, Mid-Market, Enterprise | | Company | Tenable | Start Left® Security | | Headquarters | – | – | ### Use cases and capabilities | | Nessus Professional | Start Left® Security - Product-Centric VM | |---|---|---| | Vulnerability | Yes | – | | Security Scanning | Yes | – | | CVE | Yes | – | | Penetration Testing Framework | Yes | – | | NIST | Yes | – | | PCI DSS | Yes | – | | CIS | Yes | – | | Network Scanning | Yes | – | | VAPT | Yes | – | | Vulnerability Prioritization | – | Yes | | SBOM | – | Yes | | SCA | – | Yes | ### Core features **Nessus Professional** 10 features listed. Sign in on the page to see them. **Start Left® Security - Product-Centric VM** 10 features listed. Sign in on the page to see them. ### Integrations **Nessus Professional** No integrations listed. **Start Left® Security - Product-Centric VM** 5 integrations listed. Sign in on the page to see them. ## Which one fits you Based on what each listing shows: deployment, company size, price and open source. - [Nessus Professional](https://cybersectools.com/tools/nessus-professional) fits if you need to run it on your own servers and you are a startup. - [Start Left® Security - Product-Centric VM](https://cybersectools.com/tools/start-leftr-security-product-centric-vm) fits if you want a cloud product. ## Nessus Professional vs Start Left® Security - Product-Centric VM FAQ Common questions when comparing Nessus Professional vs Start Left® Security - Product-Centric VM for vulnerability assessment. ### What is the difference between Nessus Professional and Start Left® Security - Product-Centric VM? **Nessus Professional**: Vulnerability scanner for assessing networks, systems, and apps for security flaws. Built by Tenable. **Start Left® Security - Product-Centric VM**: Risk-based, product-centric VM platform with PIRATE® risk model. Built by Start Left® Security. The table above shows where their features, integrations, deployment and company size fit differ. ### Who makes Nessus Professional and Start Left® Security - Product-Centric VM? **Nessus Professional** is made by Tenable. **Start Left® Security - Product-Centric VM** is made by Start Left® Security. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit. ### Is Nessus Professional a good alternative to Start Left® Security - Product-Centric VM? Often, yes. Nessus Professional and Start Left® Security - Product-Centric VM are both Vulnerability Assessment products. Use the table above to see where features, deployment and company size fit differ. ## Related comparisons - [Nessus Professional vs Tripwire IP360](https://cybersectools.com/compare/nessus-professional-vs-tripwire-ip360) - [Nessus Professional vs Zentara AVAS](https://cybersectools.com/compare/nessus-professional-vs-zentara-avas) - [Nessus Professional vs Positive Technologies XSpider PRO](https://cybersectools.com/compare/nessus-professional-vs-positive-technologies-xspider-pro) - [Start Left® Security - Product-Centric VM vs Tripwire IP360](https://cybersectools.com/compare/start-leftr-security-product-centric-vm-vs-tripwire-ip360) - [Start Left® Security - Product-Centric VM vs Zentara AVAS](https://cybersectools.com/compare/start-leftr-security-product-centric-vm-vs-zentara-avas) - [Start Left® Security - Product-Centric VM vs Positive Technologies XSpider PRO](https://cybersectools.com/compare/positive-technologies-xspider-pro-vs-start-leftr-security-product-centric-vm) ## Alternatives to each - [See all Nessus Professional alternatives](https://cybersectools.com/alternatives/nessus-professional) - [See all Start Left® Security - Product-Centric VM alternatives](https://cybersectools.com/alternatives/start-leftr-security-product-centric-vm) --- Source: https://cybersectools.com/compare/nessus-professional-vs-start-leftr-security-product-centric-vm For AI agents: each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/nessus-professional.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md. More on Nessus Professional and Start Left® Security - Product-Centric VM: funding, momentum, hiring and news, plus the full product and company record, are available through the Mandos MCP Server (paid plans), which connects to AI assistants: https://mandos.io/mcp?utm_source=cybersectools.com&utm_medium=compare-md