Best website vulnerability scanners for startups (2026)
For a startup without a security team, the best website vulnerability scanner tests your running app
behind the login, keeps watching it after launch, and publishes its price. AttackerView is built for
that case. Each entry below says what the tool is, what it costs and who should pick it, and every
competitor fact links to the vendor's own page.
1. AttackerView
AttackerView is a managed security testing service for web apps: it scans your app from the outside, crawls behind your login, connects findings into attack chains, and runs AI pentests with real exploit tools. Every finding comes with proof.
- Pricing
- Free, Starter €39/mo, Watchtower €119/mo, Hunter €299/mo; AI pentests €10 per endpoint source
- Verdict
- AttackerView suits startup CTOs and engineering leads at 10-50 person companies who need to secure their web apps and pass security audits without a dedicated security team. It is the best fit when your risk lives in your web app and you want continuous monitoring, AI pentests and SOC 2 or ISO 27001 evidence at a published price. It does not scan cloud accounts or internal networks, and it does not sell human-led pentests.
Scan your domain free →2. Detectify
Detectify is a Swedish DAST and external attack surface management platform whose vulnerability tests come from a crowd of 400+ ethical hackers, built for AppSec and security teams.
- Pricing
- Annual platform fee from €0, €2,500, €5,000 or €15,000 by tier; assets cost extra, amounts not published source
- Verdict
- Detectify is the stronger pick for a security team that wants crowdsourced research, external attack surface monitoring and a PCI ASV add-on, and can price assets with their sales team. AttackerView is the better fit for a startup that wants authenticated testing, AI pentests and audit evidence at a published monthly price.
Full comparison: AttackerView vs Detectify →3. Intruder
Intruder is a vulnerability and exposure management platform for lean security teams, covering external and internal infrastructure, cloud accounts and web apps and APIs, with AI pentesting.
- Pricing
- Free plan; Cloud from $299/mo (€260), Pro from $499/mo (€434) billed monthly (base fee plus a fee per target, ex-VAT); Enterprise custom source
- Verdict
- Intruder is the better pick if you need one tool across cloud accounts, internal networks and web apps. AttackerView is the better pick if your risk lives in your web app and you want attack chains, per-endpoint AI pentests and audit evidence at a published monthly price.
Full comparison: AttackerView vs Intruder →4. Nuclei
Nuclei is ProjectDiscovery's open-source (MIT) vulnerability scanner driven by YAML templates, which your team installs and runs. ProjectDiscovery also sells a hosted Cloud platform and Neo, a separate AI pentesting product.
- Pricing
- Free, open source (MIT); you pay for the infrastructure and time to run it source
- Verdict
- Nuclei is the right pick if you have security engineers who want full control, custom templates and no licence fee, and will run and maintain the scanner themselves. AttackerView is the right pick if you want testing managed for you: type a URL and get authenticated testing, AI pentests, monitoring and audit evidence without operating anything.
Full comparison: AttackerView vs Nuclei →5. Aikido Security
Aikido Security is a developer-focused application security platform that covers code (SAST, SCA, secrets), cloud, attack surface (DAST and AI pentesting) and runtime protection in one product.
- Pricing
- Free plan; Basic €300/mo, Pro €600/mo, Advanced €900/mo for 10 users (European prices; $350, $700, $1,050 in USD) source
- Verdict
- Aikido is the stronger pick if you want one platform across code, dependencies, cloud and runtime, wired into your IDE and pull requests. AttackerView is the better fit if you want deep testing of the running web app from the outside, with per-endpoint AI pentests, at a price that does not grow with team size.
Full comparison: AttackerView vs Aikido Security →7. Snyk API & Web (formerly Probely)
Snyk API & Web, formerly Probely, is Snyk's cloud DAST scanner for web apps and APIs. Snyk acquired Probely in 2024 and relaunched it in 2025; it is sold standalone or as part of the Snyk platform.
- Pricing
- Free plan; Enterprise by quote source
- Verdict
- Snyk API & Web is the better pick if you mainly scan APIs inside a Snyk shop, or want a free DAST plan with a 14-day full trial. AttackerView is the better fit if you want published pricing, attack chains and AI pentests without an Enterprise contract.
Full comparison: AttackerView vs Snyk API & Web (formerly Probely) →8. Astra Security
Astra Security is a compliance-oriented pentest platform that combines a DAST scanner, AI and human-led pentests, and API and cloud scanners, sold per target to teams that need a pentest report for an audit.
- Pricing
- Per target: DAST from $69/mo ($199/mo for unlimited scans); pentests $2,999 to $9,999+ a year source
- Verdict
- Astra is the better pick if an auditor or enterprise customer needs a human-led pentest report and certificate, which AttackerView does not sell. AttackerView is the better fit if you want continuous testing across all your apps on one monthly plan, with AI pentests paid per endpoint, rather than a price per target.
Full comparison: AttackerView vs Astra Security →