Fast rules, now inside the agent. Your business rules are the difference.

Semgrep is fast, its cross-file taint analysis follows data between files, and Semgrep Guardian scans every file an AI agent writes in Claude Code, Cursor and Windsurf. CybeDefend works at the same moment and also checks the change against the business rules your team wrote.

What Semgrep does well

Extremely fast SAST with cross-file taint analysis, a large rule library plus Pro rules maintained by its research team, approachable custom rule authoring, Supply Chain with reachability, secrets detection, AI detection of IDOR and broken authorization, and Guardian, which scans every file an AI agent writes and blocks malicious dependencies.

Where it stops

Semgrep checks code against security rules, its own or ones you write in its syntax; nothing it announces checks a change against the business rules your team wrote. Its AI detection of logic flaws runs as credit-based scans, not on every agent write. No container image scanning, and AI autofix is still in public beta.

Feature by feature

22 features, checked on Semgrep's own site and documentation in September 2026.

Feature	CybeDefend	Semgrep
Detection
Agent-time scanning	Yes	Yes
SAST	Yes	Yes
SCA	Yes	Yes
IaC scanning	Yes	Partial
Container scanning	Yes	No
Secret detection	Yes	Yes
Business logic flaws	Yes	Yes
Reachability analysis	Yes	Yes
AI-BOM: AI component inventory (EU AI Act + NIST AI RMF)	Yes	Partial
Prompt injection & LLM-misuse scanner (OWASP LLM Top 10)	Yes	Yes
AI & Agent
Agent-time (Claude Code, Cursor, Windsurf…)	Yes	Yes
IDE security copilot	Yes	Partial
AI-generated verified patches	Yes	Partial
Auto-fix → ready-to-merge PR	Yes	Partial
Security Code Knowledge Graph	Yes	No
VibeDefend: security rules distributed to AI coding agents	Yes	No
Coding agent sandbox policy (allow/deny/warn before every write)	Yes	Partial
Operations
CI/CD pipeline gate	Yes	Yes
Low false-positive rate	Yes	Yes
Fast self-serve setup	Yes	Yes
CybeRisk Score: 0-100 score + AI-generated weekly Top 10 brief	Yes	No
EU/US sovereign deployment	Yes	No

Yes NoPartial

Where we win

Rules and graphs

Semgrep's Pro engine follows tainted data across files, and its Pro rules come with sources and sinks already defined, while a custom taint rule still asks you to declare them. CybeDefend builds a knowledge graph of your codebase, with its data flows, owners and business rules, and applies checks against that model rather than against a pattern alone.

Security Code Knowledge Graph

reachable
fixed path
vulnerable

Shared rules vs rules mined from your code

Semgrep's rule library, community and Pro, is one of the best in the industry, and you can write your own rules in its syntax. CybeDefend adds rules mined from your own codebase: patterns specific to your auth system, your data model and your business logic, the kind a shared rule library cannot know about.

VibeDefend: rule broadcastactive

Claude CodeRules served
CursorRules served
GitHub CopilotRules served
OpenAI CodexRules served

Same moment, different rule books

Semgrep Guardian hooks into Claude Code, Cursor and Windsurf, scans each file the agent writes with Code, Supply Chain and Secrets, and prompts the agent to regenerate until the scan is clean. CybeDefend works at the same moment. The difference is the rule book: vulnerability rules on one side, vulnerability rules plus your business rules on the other.

SQL injection, found while the agent writes

CWE-89

const id = parseInt(req.query.id, 10)

PR opens clean

Both check the agent's code as it is written. Semgrep asks whether it matches a security rule; CybeDefend also asks whether it breaks a rule of your business.

Pricing at a glance

Our platform is free to self-host, or priced per active developer on Cloud. VibeDefend is free to try, then priced with you after a pilot.

CybeDefend

CommunityFree, on your servers
CloudPriced per active developer
EnterpriseOn quote
VibeDefendFree to try, then a price set with you

See full pricing

Semgrep

Free Edition10 usersFree
Teams10 users$3,600/year
EnterpriseContact sales

Competitor prices: the lowest annual list price published for the plan shown, taken from the vendor's website or its own marketplace listing and checked in September 2026. Always verify before purchasing.

Frequently Asked Questions

Does CybeDefend support custom rules like Semgrep?

Yes. CybeDefend lets you write custom rules on top of the rules it mines from your code. Semgrep rules describe code patterns and taint flows in Semgrep's syntax; CybeDefend rules can also draw on the knowledge graph, such as data flow and ownership, and on your business rules.

Can CybeDefend be used alongside Semgrep?

Yes. Semgrep for its rule library and Supply Chain, CybeDefend for business rules and agent-time checks, is a valid setup. Both can sit in the agent loop, so decide which one blocks and which one only reports, to avoid asking the agent twice.

How does false-positive rate compare?

It depends on the rules. Semgrep's own docs note that community rules can produce more false positives than its Pro rules, and Semgrep Assistant uses AI to flag likely false positives. CybeDefend adds reachability and business context from its knowledge graph and surfaces findings where the vulnerable path is actually exercised.

Install VibeDefend

One command wires every coding agent on this machine to your rules and your guards.

npx -y @cybedefend/vibedefend@latest install