Shortlist by what you need
Start here if you know why you are leaving Nullify AI.
Want the closest match?
MobbMost similar to Nullify AI in what it does, its category and its price.
Visit (opens Mobb in a new tab)Need a free plan?
ZeroThreat.aiHas a free plan, rated 4.0 out of 5. Nullify AI has none.
Visit (opens ZeroThreat.ai in a new tab)Want to pay less than Nullify AI?
Bricklayer AIFrom $50/mo, against from $67/mo for Nullify AI.
Visit (opens Bricklayer AI in a new tab)Want the best rated?
Seal SecurityRated 4.1 out of 5 in our review, against 4.0 for Nullify AI.
Visit (opens Seal Security in a new tab)
At a glance
Green means better than Nullify AI, red means worse. Prices are starting prices per month.
| Tool | Our rating | Starts at | Free plan | Best for | Compare |
|---|---|---|---|---|---|
 Nullify AIBaseline | 4.0 | $67/mo | No | Autonomous AI agent that finds, prioritizes, and fixes code vulnerabilities. | |
| Mobb | 4.0Same | $20/mo$47 less | YesNullify AI has none | Fixes security vulnerabilities in code rather than only reporting them. | vs Nullify AI |
| ZeroThreat.ai | 4.0Same | $100/mo$33 more | YesNullify AI has none | AI-powered DAST scanner checking web apps and APIs against 40,000+ vulnerabilities | vs Nullify AI |
| Seal Security | 4.1+0.1 | Not listed | No | Remediation agent that ships production-ready fixes for open source vulnerabilities | vs Nullify AI |
 Superagent | 4.0Same | Free | YesNullify AI has none | An AI security service that finds vulnerabilities in repos, web apps and agents, then fixes them. | vs Nullify AI |
| Bricklayer AI | 4.0Same | $50/mo$17 less | No | Coordinates autonomous AI agents alongside human analysts to triage and investigate security operations center cases. | vs Nullify AI |
 RunSybil | 4.1+0.1 | Not listed | No | Autonomous offensive security that finds exploitable vulnerabilities at development speed. | vs Nullify AI |
 Vicarius | 4.1+0.1 | Not listed | No | VRx delivers automated patching, patchless protection and script-based remediation. | vs Nullify AI |
 Enkrypt AI | 4.1+0.1 | Not listed | No | Security and safety testing for AI systems, covering threat detection and ongoing monitoring. | vs Nullify AI |
The alternatives in detail
In order of how closely each one matches Nullify AI.
Mobb
4.0$20/mo
vs Nullify AI$47 lessSameFree plan
Fixes security vulnerabilities in code rather than only reporting them.
- Automatic remediation of scanner findings
- Fixes delivered into the developer workflow
- Works from existing security tooling
Produces fixes rather than adding to a findings backlog
Generated fixes need review before merging
ZeroThreat.ai
4.0$100/mo
vs Nullify AI$33 moreSameFree plan
AI-powered DAST scanner checking web apps and APIs against 40,000+ vulnerabilities.
- DAST scanning across web applications and REST APIs
- Library of 40,000+ vulnerability checks
- Vendor-stated 98.9% detection accuracy with low false positives
Free tier lets you scan before committing to a plan
Per-target pricing grows costly across a large application estate
Seal Security
4.1Not listed
vs Nullify AI+0.1
Remediation agent that ships production-ready fixes for open source vulnerabilities.
- Production-ready fixes for open source vulnerabilities
- Backported patches that avoid breaking version upgrades
- Human vetting of fixes before delivery
Backports avoid forcing breaking dependency upgrades
Ecosystem coverage should be confirmed for less common languages
Superagent
4.0Free
vs Nullify AISameFree plan
An AI security service that finds vulnerabilities in repos, web apps and agents, then fixes them.
- Finds and fixes vulnerabilities rather than only reporting them
- Covers repositories, web applications and AI agents
- Continuous scanning rather than periodic penetration testing
Delivering fixes removes the step where security work usually stalls
Automated fixes still require review before merging
Bricklayer AI
4.0$50/mo
vs Nullify AI$17 lessSame
Coordinates autonomous AI agents alongside human analysts to triage and investigate security operations center cases.
- 50+ specialized AI agents across the SOC workflow
- Automated alert triage and incident investigation
- Dedicated Threat Intelligence Analyst and Incident Responder agent roles
Founder brings direct prior-company experience running a threat-intelligence platform (ThreatConnect)
Standard plan pricing (around $50/month) is found only through third-party review sites, not a public Bricklayer pricing page
RunSybil
4.1Not listed
vs Nullify AI+0.1
Autonomous offensive security that finds exploitable vulnerabilities at development speed.
- Autonomous offensive testing rather than passive scanning
- Establishes exploitability rather than listing theoretical findings
- Noise elimination so teams triage less
Exploitability turns a backlog into an actionable priority list
Offensive testing requires careful scoping and authorisation
Vicarius
4.1Not listed
vs Nullify AI+0.1
VRx delivers automated patching, patchless protection and script-based remediation.
- Automated patching across apps, OS and third-party software
- Patchless protection mitigating vulnerabilities before patching
- Script-based remediation where no packaged fix exists
Patchless protection covers the window where exploitation happens
Patchless mitigation is a stopgap, not a substitute for patching
Enkrypt AI
4.1Not listed
vs Nullify AI+0.1
Security and safety testing for AI systems, covering threat detection and ongoing monitoring.
- Security and safety testing specific to AI systems
- Detection of prompt injection, jailbreaks and harmful output
- Vulnerability remediation rather than reporting alone
Addresses failure modes conventional application security misses
Only relevant to organisations actually deploying AI systems
FAQ
Questions people ask
Is Nullify AI free?
Nullify AI does not list a free plan. Paid plans start from $67/mo.
What is the best free alternative to Nullify AI?
Mobb is the highest-rated alternative here with a free plan (4.0 out of 5). Other free options: ZeroThreat.ai, Superagent.
What is the cheapest alternative to Nullify AI?
Among paid plans, Mobb has the lowest starting price (from $20/mo). If you need it free, start with Mobb.
How did you pick these alternatives?
We match tools on what they do, their category and their price, using the details in our directory. Ratings come from our reviews and reader reviews.