ZeroDay Labs is a cybersecurity certification training platform built on adaptive practice. Our adaptive engine pinpoints your weak domains in CompTIA Security+ (SY0-701) and (ISC)² CISSP, then trains you against them — not against material you already know. Take a free 25-question adaptive diagnostic and see your domain-by-domain readiness in under 15 minutes. No credit card required, no email gate, no sales call. Working SOC analysts, career changers, and engineers preparing for their first cybersecurity certification can sit a session over a coffee break and walk away with a real readiness score.
The Security+ adaptive practice exam is aligned to the official SY0-701 objectives and weighted across all five exam domains: General Security Concepts, Threats Vulnerabilities and Mitigations, Security Architecture, Security Operations, and Security Program Management and Oversight. Question difficulty scales to your live ability after every answer, and every option carries an explanation so you learn why the right answer is right — not just that it is. Free 25-question diagnostic; no card required to start. Most candidates need 25 to 40 hours of focused practice before passing, and our session analytics show you exactly which domains still need work.
Our CISSP practice engine mirrors the official Computerized Adaptive Testing format used by (ISC)². Full sessions deliver 100 to 150 items, adapt difficulty in real time using item response theory, and report a domain-by-domain readiness score after every session covering all eight CBK domains — Security and Risk Management, Asset Security, Security Architecture and Engineering, Communication and Network Security, Identity and Access Management, Security Assessment and Testing, Security Operations, and Software Development Security. Designed for working professionals — train in 30-minute blocks, walk into the exam knowing exactly where you stand.
Beyond the adaptive certification engine, ZeroDay Labs offers 168+ scenario-based practice questions across 18 topic-focused quizzes — network defense and segmentation, applied cryptography, web application security and the OWASP Top 10, incident response tabletops, security governance, identity and access management, threat modeling, vulnerability management, cloud security posture, and more. Every question carries per-option explanations, so wrong answers turn into teaching moments rather than dead ends. Use the topic quizzes to drill the specific area your last adaptive session flagged as weak.
Domain-mapped written study guides for both Security+ and CISSP, plus long-form articles on certification exam strategy, the OWASP Top 10, CISSP CAT internals, MITRE ATT&CK in everyday SOC work, NIST Cybersecurity Framework mappings, and 30-day study plans. Written for working professionals — focused 10 to 15 minute reads you can study between meetings, on a commute, or as a structured warm-up before a practice session. Every guide cross-links to the relevant adaptive practice items so reading and drilling reinforce each other.
Pro unlocks an in-browser lab library that turns book knowledge into reps. Triage a phishing campaign and decide which artifacts are real IOCs, walk an OWASP Top 10 vulnerability from discovery to remediation, audit an over-permissioned IAM policy, harden a misconfigured cloud bucket, and run an incident response tabletop end to end. Every lab grades your decisions, awards skill-tagged badges, and produces resume-ready feedback you can share with hiring managers — proof of practice, not just a pass mark on a multiple-choice test.
Static question banks waste your time on items you already know cold. Our adaptive engine sizes each question to your live ability estimate, so the practice you do is the practice that moves your score. After every session you get a domain-by-domain readiness chart, a list of the specific objectives you missed, and direct links to the matching study guides. That feedback loop — diagnose, study, drill, retest — is the one researchers consistently find moves cert pass rates the most.
Career changers and bootcamp grads taking their first cybersecurity certification, working SOC analysts and helpdesk pros stepping up to Security+, mid-career engineers and architects preparing for CISSP, and AppSec or platform engineers who want a structured adaptive track for AI security. If you're studying alone, on your own schedule, and you want a clear signal of when you're actually ready to sit the exam — this is for you.
Take a 25-question adaptive session, browse the full topic-quiz library, and read every published study guide on the free plan with no card. Pro unlocks unlimited adaptive sessions, full-length CAT simulations up to 150 items, the hands-on lab library, exam-day pacing reports, and priority support. Cancel anytime; we don't lock content behind annual contracts.
ZeroDay Labs — cybersecurity certification training. Adaptive practice exams for CompTIA Security+ (SY0-701) and (ISC)² CISSP. Free plan, no credit card required.