Nessus vs Terra Security: Pricing and Ratings Compared (2026)
Entry prices and free plans as read on each vendor's pricing page, and user ratings as published on review sites, for Nessus and Terra Security side by side. This page compares data; it is not a hands-on review.
On the data: On the data below, Nessus leads on a free plan. We do not name an overall winner for this pair.
Short on time? Here's the quick answer
Based on published vendor pricing and features and on public review data, here's who should pick what:
Nessus
Vulnerability assessment scanner
Best for you if:
- • You want a fully free tool (Terra Security requires payment)
Terra Security
Agentic AI platform for continuous penetration testing, combining AI scale with human supervision.
Best for you if:
- • You want delivers critical insights often missed by other pentesters
| At a Glance | Nessus | Terra Security |
|---|---|---|
Starts at | Free plan, paid from $399.17/mo flat, billed yearly Nessus Professional plan | Not published |
Category | Security Vulnerability Scanning | Testing & QA AI Agents |
Rating | 4.6/5 G2 4.5 · Capterra 4.7 402 reviews | n/a |
Free plan | Yes | No |
Choose Nessus or Terra Security?
Choose Nessus if
- You want a fully free tool (Terra Security requires payment)
- You want industry standard scanner
- You want good vulnerability detection
- You work in security, not testing & QA
Choose Terra Security if
- You want delivers critical insights often missed by other pentesters
- You want ensures continuous evaluation of new or updated features for vulnerabilities
- You work in testing & QA, not security
In-Depth Analysis
Nessus
Vulnerability assessment scanner
It's best for organizations prioritizing comprehensive, enterprise-grade vulnerability management.
Strengths
- Pro: Industry standard scanner
- Pro: Good vulnerability detection
- Pro: Comprehensive coverage
- Pro: Good reporting
- Pro: Active development
Weaknesses
- Con: Expensive
- Con: Learning curve
- Con: Resource intensive
- Con: Per-asset pricing
- Con: Better alternatives exist
Key features
Terra Security
Agentic AI platform for continuous penetration testing, combining AI scale with human supervision.
Strengths
- Pro: Delivers critical insights often missed by other pentesters.
- Pro: Ensures continuous evaluation of new or updated features for vulnerabilities.
- Pro: Produces verified, exploitable, business logic-driven outputs.
- Pro: Boosts ROI by over 100% by reducing repetitive tasks.
- Pro: Doubles web app attack surface coverage without increasing costs or resources.
Weaknesses
- Con: Specific pricing details are not publicly available.
- Con: Requires integration into existing development workflows.
Key features
Plans and prices: Nessus vs Terra Security
| Tool | Plans and prices | Source |
|---|---|---|
| Nessus |
| tenable.com/products/nessus read Nov 1, 2026 |
| Terra Security | No plan prices on file | terra.security |
Prices as read on each vendor's own pricing page on the date shown. Plans are listed per tool and are not matched against the other tool's plans: a plan name or price in one column says nothing about the same row in the other. Details on Nessus pricing and Terra Security pricing.
Key Takeaways
Nessus
- Has a free plan
Terra Security
- Choose if you want agentic AI platform for continuous penetration testing, combining AI scale with human supervision
What the data shows
On the data below, Nessus leads on a free plan. We do not name an overall winner for this pair.
- Only Nessus has a published user rating (4.6/5 from 402 reviews); Terra Security has none we can show.
- Nessus starts at $399.17/mo flat, billed yearly; Terra Security has no public paid plan price on file.
- Only Nessus has a free plan.
Criteria: user rating (only above 20 reviews on both sides, gap of 0.2 or more), entry price (only on the same billing basis), free plan. How we rate
Frequently Asked Questions
How do Nessus and Terra Security compare in 2026?
On the data below, Nessus leads on a free plan. We do not name an overall winner for this pair. Only Nessus has a published user rating (4.6/5 from 402 reviews); Terra Security has none we can show. Nessus starts at $399.17/mo flat, billed yearly; Terra Security has no public paid plan price on file. Only Nessus has a free plan.
What are Nessus and Terra Security used for?
Nessus: Vulnerability assessment scanner. Terra Security: Agentic AI platform for continuous penetration testing, combining AI scale with human supervision.
What does Nessus cost vs Terra Security?
Nessus's cheapest paid plan is Nessus Professional at $399.17/mo flat, billed yearly. Terra Security has no public paid-plan price on file. Prices read on the vendors' pricing pages, latest check Nov 1, 2026.
What's the main difference between Nessus and Terra Security?
Nessus's main strength: industry standard scanner. Terra Security's main strength: delivers critical insights often missed by other pentesters.