The 6 best Intruder alternatives in 2026
Published May 17, 2026 · Editorial, not sponsored. All pricing references reflect the public vendor websites at the time of writing. CyberScore is at #3 — not first, because Detectify is the more direct Intruder peer for most readers.
Intruder is a solid SaaS vulnerability scanner with a reasonably polished UI and a hybrid external + internal coverage story. If you are reading an "Intruder alternatives" article you are probably one of four people: the renewal quote arrived and the per-target multiplier hurt, you only need external monitoring and dropped the authenticated-scan capability you were paying for, you need EU residency Intruder cannot satisfy from its UK default, or you want a report a non-engineer can actually read.
This roundup is honest about all four cases. Detectify is the most direct peer in the category. Probely is the strongest DAST-first competitor. CyberScore is the right pick for a specific subset of the market — we will say where and where not. Nessus is the right pick if you actually need an internal scanner; Pentest-Tools and OpenVAS round out adjacent use cases that sometimes overlap with what Intruder does.
#1Detectify
Swedish-built external attack-surface and DAST product. The most direct Intruder peer for SMB / mid-market — similar scope, comparable maturity, more emphasis on web-app DAST.
Pricing: Subscription tiers on the public Detectify pricing page — Surface Monitoring and Application Scanning. Mid-three to low-four figures per month depending on asset count.
Strengths
- Strong external attack-surface monitoring with a polished UI.
- Application Scanning (DAST) is mature — runs payload-based detection against known web-app vulnerability classes.
- EU-founded (Sweden) — EU data residency conversations are easier than with a US vendor.
Weaknesses
- Pricing escalates quickly as asset count grows — easy to outgrow the entry tiers.
- Reports lean toward security engineers, less toward board / non-technical readers.
- No internal network scanning — same external-only scope as Intruder, by design.
Best for: SMB to mid-market wanting an established external + DAST product from an EU vendor.
#2Probely
Portuguese-founded DAST-first product with strong API security coverage and an emphasis on developer-friendly workflows.
Pricing: Subscription tiers on the public Probely pricing page — small business, professional, enterprise. Starts in the low hundreds per month.
Strengths
- API security coverage (OpenAPI / Swagger / GraphQL) is genuinely above-average for this price tier.
- Tight CI / CD integration — built to live inside engineering pipelines, not just SOC dashboards.
- EU-founded, EU-hosted options available.
Weaknesses
- DAST-first — narrower than Intruder on the pure external-surface side (subdomain discovery, OSINT, leaked secrets).
- Smaller installed base than Intruder or Detectify — fewer regional reference customers.
Best for: Engineering-led teams who want DAST inside CI/CD rather than a standalone SOC product.
#3CyberScorethat's us
French-built passive external attack-surface monitoring for SMB and mid-market. Fourteen scanners across five pillars, weekly digest, no agents.
Pricing: $49 one-time / $249 per month Pro / $399 per month Always-On (-20% annual).
Strengths
- Reports a non-engineer can read — 0-100 score, top-five findings, plain-language PDF.
- EU-hosted (France, single VPS, single Postgres per tenant). Data never leaves the EU.
- Published pricing, credit-card-this-afternoon. No sales call.
- Public opt-in /badge/<domain> page for transparency-conscious teams.
Weaknesses
- External only and passive. No authenticated DAST, no internal scanning, no agent CVE detection.
- BOLA / API checks are heuristic (Swagger parsing, GraphQL introspection), not active exploitation.
- Single VPS architecture — perfectly fine at our current scale, but not the right answer if you need multi-region SLAs.
Best for: SMBs without a dedicated security team who need EU hosting and a board-friendly report alongside the technical detail.
#4Tenable Nessus
Long-running vulnerability scanner — strong internal-network coverage and a deep CVE plugin library. Nessus Professional is the standalone scanner; Tenable.io / Tenable.sc are the SaaS / on-prem platforms.
Pricing: Nessus Professional is typically a few thousand USD per year per scanner per the public Tenable pricing page. Tenable.io is quote-driven, mid-four to five figures annually for typical mid-market deployments.
Strengths
- Best-in-class CVE / plugin coverage with a long industry pedigree.
- Strong internal-network and compliance scan modes (PCI, HIPAA, CIS benchmarks).
- On-prem option available — useful for regulated environments where SaaS scanning is off the table.
Weaknesses
- Operator-led tool. Less of a "set and forget" SaaS than Intruder.
- Reports are dense and technical — not designed for board / non-technical audiences.
- External attack-surface monitoring is not its core strength. Better as a scanner than as continuous external coverage.
Best for: Mid-market or enterprise with a security engineer who needs deep internal scanning and compliance audits.
#5Pentest-Tools.com
Web-based collection of well-known offensive tools packaged into a SaaS interface with reporting.
Pricing: Tiered SaaS plans on the public pricing page — starts at the low hundreds per month for personal use, more for teams.
Strengths
- Genuinely cheap entry point.
- Useful as a hands-on tool for someone learning offensive security.
- Network plus web scans in one UI.
Weaknesses
- Narrower continuous-monitoring story than Intruder — better as a pentester toolbox than as a managed monitoring product.
- Reporting and alerting are less polished than the SaaS-first peers in this list.
Best for: Solo security person at a small company who wants on-demand scans without a heavy contract.
#6OpenVAS / Greenbone Community Edition
Open-source vulnerability scanner maintained by Greenbone. The community edition is free; Greenbone Enterprise adds a polished UI, support and a commercial feed.
Pricing: Community Edition: free. Greenbone Enterprise: quote-driven via Greenbone sales — typically mid-four to five figures annually depending on asset count and support.
Strengths
- Zero licence cost on the community edition.
- Decent CVE coverage thanks to the Greenbone vulnerability feed.
- Self-hosted — full control over data and scan scheduling.
Weaknesses
- Operator-time cost is real. Expect to invest engineering hours in deployment, tuning and upkeep.
- UI and reporting are functional, not polished.
- No managed continuous monitoring — that is your job.
Best for: Teams with an in-house security engineer who is comfortable operating self-hosted infrastructure and wants to avoid SaaS licence costs.
Decision matrix
| If you are… | Probably pick |
|---|---|
| SMB / mid-market, want a direct Intruder peer | Detectify |
| Engineering-led, want DAST inside CI/CD | Probely |
| SMB, need EU hosting and a board-friendly report | CyberScore |
| Need deep internal scanning and compliance audits | Tenable Nessus |
| Solo security person, on-demand scans | Pentest-Tools.com |
| Have an in-house engineer, want to avoid licence costs | OpenVAS / Greenbone |
The honest meta-point
Vulnerability scanning has converged on broadly similar feature sets at the SaaS tier — subdomain discovery, TLS posture, HTTP headers, SPF / DKIM / DMARC, OSINT, CVE matching. The real differentiators in 2026 are not feature coverage, they are pricing model (per-target vs flat-fee), report audience (engineer vs board), hosting region (UK / US / EU) and whether you actually use the authenticated-scan capability you are paying for. Pick the tool whose defaults match where you are, not the one with the longest feature list.
Frequently asked questions
Why look for an Intruder alternative?+
The most common reasons we hear: pricing climbed as asset count grew (Intruder is per-target), the report style was geared toward a security engineer rather than a CTO or board, EU data residency was needed and Intruder is UK-hosted by default, or the team only needed external monitoring and was paying for an authenticated-scan capability they never used.
What is the cheapest Intruder alternative?+
For paid SaaS, CyberScore at $249/month (Pro) is one of the cheaper options with comparable external coverage. Pentest-Tools.com starts in the low hundreds per month. OpenVAS / Greenbone Community Edition is zero licence cost but requires operator time to deploy and maintain. The absolute cheapest is DIY (Nuclei + Subfinder + httpx) — zero licence cost, significant operator skill required.
Does CyberScore do authenticated scanning like Intruder?+
No — by design. CyberScore is passive and external only: we never log into customer applications and never send exploit payloads. Intruder offers authenticated web-application scanning and credential-based internal checks, which is genuinely useful for some teams. If authenticated scanning is a hard requirement, Intruder, Probely or Acunetix are better picks than CyberScore.
Is Tenable Nessus a good Intruder alternative?+
Nessus Professional is a strong vulnerability scanner with a long pedigree, especially for internal network scanning and compliance audits. It is less of a SaaS continuous-monitoring product and more of a scanner you point at targets. If you want SaaS-style scheduled scans with a clean dashboard, stick closer to Intruder peers (Detectify, Probely, CyberScore). If you want a deep scanner you operate yourself, Nessus is a better fit.
Is CyberScore really not #1 on its own list?+
Correct. Detectify is the most direct Intruder peer in 2026 — similar audience, similar feature surface, similar maturity. CyberScore is the right pick for a specific subset (SMBs wanting EU hosting, a board-friendly report, published pricing and no sales call) but it would be dishonest to call it the universal #1.
See where you sit before talking to any vendor
Run a free CyberScore sample scan on your own domain. Two minutes, no card. If the report matches your needs, the path forward is one of the cheaper ones on this list. If it does not, you will at least know which gaps the others need to fill.
Spotted a factual error or stale pricing? Email patrick@cybersco.re.