Comparison · Vexta
Vexta vs Tenable Nessus: an honest comparison.
Tenable Nessus is a long-established vulnerability scanner for security practitioners, sold as Nessus Professional and Nessus Expert, with a plugin library Tenable puts at more than 319,000 and configuration and compliance auditing. Vexta is a self-hosted scanner focused on web applications and APIs, with non-destructive proof-of-exploitation checks, CI/CD output and optional AI triage using your own LLM API key.
This comparison is based on Tenable Nessus's public documentation and our own work with Vexta. We sell Vexta, so read it with that bias in mind, and check Tenable Nessus's current plans and features on their site before you decide. No paid placements, no affiliate links.
Pick Vexta if
You want web application and API findings verified before anyone reads them, CI/CD output and optional AI triage, from one self-hosted binary.
Pick Tenable Nessus if
You need broad host, operating system and network device vulnerability coverage, with a very large plugin library and configuration and compliance audits.
There is no single right answer in a Vexta vs Tenable Nessus decision. Both products solve the same surface problem - finding vulnerabilities before an attacker does - but they make different bets about who is operating the tool, how much manual review is acceptable, and what the report has to look like for downstream auditors.
The honest test is this: point both at the same target and compare the findings. Vexta has a free trial; check Tenable Nessus's website for its current trial options.
Side-by-side
Vexta vs Tenable Nessus: feature comparison
| Feature | Vexta | Tenable Nessus |
|---|---|---|
| Web application and API testing (injection, SSRF, request smuggling, access control) Nessus Expert includes web application scanning for a set number of domains; Tenable sells deeper web application testing as a separate product, Tenable Web App Scanning. | ✓ | ∼ |
| Host and network vulnerability coverage Vexta port-scans hosts and checks exposed services against 10,000+ community templates, about 4,000 of them CVE-specific. Nessus's plugin library goes much deeper on operating systems, devices and patch levels. | ∼ | ✓ |
| Configuration and compliance audits Vexta Enterprise audits AWS, Azure and GCP configuration and exports SOC 2 and PCI-DSS v4 evidence packs. | ∼ | ✓ |
| Proof-of-exploitation check on each finding | ✓ | Not a stated feature |
| Risk scoring Vexta Confidence Score, with EPSS and CISA KEV on Pro and Enterprise; Nessus uses CVSS v4, EPSS and Tenable’s VPR. | ✓ | ✓ |
| External attack surface discovery | ✓ | Nessus Expert |
| CI/CD output (SARIF, JUnit) | ✓ | Not a stated feature |
| AI triage with your own LLM key | ✓ | Not a stated feature |
| Deployment | Single self-hosted binary | Installed software; Tenable says it runs on any platform, including Raspberry Pi |
| Free trial | Yes - no card required | Yes, via a form on tenable.com |
Common questions
Is Vexta a Nessus alternative?
For web applications and APIs, it can be: Vexta tests more than 25 vulnerability classes and tries to prove each finding with a non-destructive check before you see it. For broad host, operating system and network device vulnerability management, Nessus covers far more ground. Many teams run a host scanner like Nessus alongside a web-focused tool.
Can we use both?
Yes, and it is a common pattern: Nessus for infrastructure and configuration auditing, Vexta for verified web application and API findings that drop into your CI/CD pipeline.
How is Vexta priced?
Vexta has a free trial (no card required), then monthly, quarterly or yearly plans published on our pricing page. Tenable publishes Nessus pricing on tenable.com.
Try Vexta on one target.
No agents to install, no card to enter, no SDR call. Start with the free trial.