Security & Cybersecurity · head to head
Nessus vs Descope
Nessus
Security & Cybersecurity
The most trusted vulnerability assessment solution
- From
- Free
- Rated
- -
Descope
Security & Cybersecurity
No-code drag-and-drop authentication platform.
- From
- Free
- Rated
- -
The short version
- Each has a real cost: Nessus nessus Professional is $4,790 for one year, with no free or low cost commercial tier; Descope free tier capped at 7,500 MAU; Pro tier at 10,000 MAU, Growth tier at 25,000 MAU, forcing migration to Enterprise for larger organisations
Where they differ
Only the attributes on which Nessus and Descope actually diverge.
Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Security & Cybersecurity).
What each one covers
Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.
Only in Nessus
- Vulnerability scanning
- Configuration auditing
- Malware detection
- Web application scanning
- Cloud scanning
- Compliance checks
- Patch auditing
- Pre-built policies
Only in Descope
Nothing recorded that Nessus does not also cover.
What people use each for
The jobs each tool is most often brought in to do.
Nessus
- Scanning hosts and applications for known vulnerabilities and misconfigurationsnot Descope
- Running compliance and configuration audits against a defined scopenot Descope
Descope
- Organisations seeking rapid identity implementation without custom developmentnot Nessus
- Companies supporting multiple user types (consumers, partners, AI agents) in single platformnot Nessus
- Multi-tenant B2B2C SaaS applications requiring per-organisation identity policiesnot Nessus
- Teams building passwordless-first authentication experiencesnot Nessus
- Healthcare and regulated industries requiring HIPAA-compliant identity managementnot Nessus
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Nessus
- Nessus Professional is $4,790 for one year, with no free or low cost commercial tier
- Multi year terms are the only discount route, at $9,330.95 for two years and $13,637.54 for three
- It is a single user scanner, so team workflows mean migrating to another Tenable product
- Tenable One vulnerability management is priced separately, starting at $3,500 a year for 100 assets
Descope
- Free tier capped at 7,500 MAU; Pro tier at 10,000 MAU, Growth tier at 25,000 MAU, forcing migration to Enterprise for larger organisations
- HIPAA compliance only available in Growth tier ($799/mo) and above; not included in lower-priced plans
- No-code UI builder provides pre-built flows but still requires custom frontend development for fully-branded authentication experiences
- All paid tiers billed annually; no monthly billing option for commitment-free flexibility
- Bot protection features available only in Growth tier and above
Pricing, plan by plan
Nessus
Free- Nessus Essentials (Free)Free
- 16 IP addresses
- Vulnerability scanning
- Configuration auditing
- Nessus Professional$2990/year
- Unlimited IPs
- Compliance checks
- Live results
- Nessus Expert$5290/year
- All Pro features
- External attack surface
- Cloud infrastructure scanning
Descope
Free- Free ForeverFree
- 7,500 monthly active users
- Basic authentication
- Community support
- Pro$249/month
- 10,000 monthly active users
- Custom domains
- CI/CD integration
- Growth$799/month
- 25,000 monthly active users
- Bot protection
- Fine-grained authorisation
- Enterprise$null/month
- Unlimited monthly active users
- Tiered discounts
- Premium support with dedicated CS engineer
Which should you pick?
Choose Nessus if
- You need vulnerability scanning.
- You want to start without paying.
- You work on Desktop, Api.
- You also want configuration auditing.
Questions people ask
- Is Nessus or Descope better?
- Neither clearly leads. Nessus starts at Free and Descope at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Nessus or Descope?
- Nessus starts at Free and Descope at Free.
- Does Nessus or Descope run on more platforms?
- Nessus runs on Desktop, Api. Descope runs on Web, iOS, Android, API.
- Can I use Nessus for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is Nessus best used for?
- Nessus is most often used for scanning hosts and applications for known vulnerabilities and misconfigurations, running compliance and configuration audits against a defined scope. Of those, scanning hosts and applications for known vulnerabilities and misconfigurations and running compliance and configuration audits against a defined scope are not what Descope is typically brought in for.
- What can Nessus do that Descope cannot?
- Nessus covers Vulnerability scanning, Configuration auditing, Malware detection, Web application scanning.
Answered from the vendors’ own pages
Descope: Can I build custom authentication flows without code?
Yes. Descope's drag-and-drop workflow interface allows you to construct and modify signup, login, MFA and SSO flows without code changes.
SourceDescope: Does Descope support AI agent authentication?
Yes. Descope supports building identity journeys for AI agents and MCP servers, including scoped OAuth tokens and delegation chains.
SourceDescope: Is Descope HIPAA compliant?
HIPAA compliance is available in Growth tier and above, starting at $799/month.
Source