Semgrep Alternative: SlopCop vs Semgrep Compared

Side by side.

As of November 2026. Each statement about Semgrep is from Semgrep’s own pages, listed under Sources.
	SlopCop	Semgrep
What it is	Hosted static analysis of the change a coding agent makes.	Code security for builders and agents: one platform for SAST, dependency scanning, secrets scanning and malware protection.
With coding agents	A skill and a Stop hook have Claude Code and Codex run a check and fix what it finds. Agents with no shell reach it over MCP.	Semgrep Guardian, a plugin for AI coding agents that bundles an MCP server, hooks and skills. Its hooks scan on every file write, and Semgrep names Claude Code, Cursor and Windsurf.
Pull request checks	On GitHub.	On GitHub, GitLab, Bitbucket and Azure.
Rules you write	Bifrost policies kept in the repository, under `.slopcop/policies`.	YAML rule files.
Charged by	The check: 1,000 free each calendar month, then $0.001 each (pricing).	The contributor, on its paid plans (Semgrep’s pricing).

What we measured.

DataFlowBench is our own benchmark, so read it as a vendor’s. Its method, every result and the raw evidence are public. Each question is a small test program: does data from a source reach a sink? Half hold a real flow and half a near miss. It put those questions to Bifrost, the open-source engine a SlopCop check runs, and to Semgrep Community Edition.

DataFlowBench v0.9.2, released 7 November 2026: each analyzer on the questions in the languages it covers, 13 for Bifrost and 11 for Semgrep CE (Semgrep Community Edition).
Analyzer	Questions	Right	Wrong	No answer
Bifrost 0.15.1	886	527	1	358
Semgrep CE 1.181.0	746	132	22	592

Community Edition, not Semgrep Code: The benchmark ran Semgrep Community Edition. Semgrep says Community Edition does single-function taint analysis, and that Semgrep Code, in Semgrep AppSec Platform, adds cross-file and cross-function analysis. Semgrep Code is not in the benchmark.
Out of scope is not wrong: All 592 of Semgrep Community Edition’s unanswered questions are ones the benchmark sets outside its documented scope before it runs. Bifrost’s 358 are analyses it could not finish, where it makes no claim either way.
The engine, not a check: The scores are Bifrost’s on test programs, with sources and sinks the benchmark supplies. A SlopCop check runs Bifrost with SlopCop’s own rules on your change, which the benchmark does not measure, and it does not estimate accuracy on real projects.

Where Semgrep Community Edition does better. DataFlowBench v0.9.2 also asks, in Java, JavaScript and Python, whether a tool’s own rule language can declare a case’s sources, sinks and sanitizers and carry the flow, and what each tool decides with the rules it ships and nothing supplied.
	Bifrost	Semgrep CE
Questions its rule language can express	8 of 24 questions in each language.	10 of 24 questions in each language.
Of those, answered right	7 in Java, 4 in JavaScript and 7 in Python. It left the rest unanswered.	All 10 in each language.
With the rules it ships	No answers. It declined all 12 questions in each language.	8 of Python’s 12 right and 4 wrong. It declined Java’s and JavaScript’s.

When Semgrep is the better pick.

You want dependency scanning, secrets scanning and malware protection on the same platform as your code scanning.
You want one platform to manage and enforce security across an organization.
Your pull requests are on GitLab, Bitbucket or Azure. SlopCop’s pull request checks run on GitHub.
You want the cross-file taint analysis of Semgrep Code, which our benchmark did not run.

More comparisons.

SlopCop vs CodeQL

Side by side, with our benchmark of Bifrost and CodeQL in eleven languages and when CodeQL is the better pick.

All comparisons

SlopCop beside CodeRabbit, SonarQube and your coding agent’s own review, and what a SlopCop check is.

Sources.

How this page was checked: Each statement about Semgrep comes from Semgrep’s own pages, listed here, as they read on the day given. Each number comes from our own benchmark. Products change, so read their pages before you decide.
Semgrep: Read on 11 November 2026: semgrep.dev, semgrep.dev/products/semgrep-guardian, docs.semgrep.dev/writing-rules/overview, semgrep.dev/pricing.
Semgrep’s editions: Read on 12 November 2026: docs.semgrep.dev/semgrep-pro-vs-oss.
DataFlowBench: Our own benchmark, version 0.9.2, released on 7 November 2026 and read on 12 November 2026: dataflowbench.slopcop.com. Its method, the frozen snapshot and the cases and raw evidence are public.
Names: Semgrep and the other product names on this page are trademarks of their owners. SlopCop is not affiliated with them, and none of them endorses this page.

SlopCop vs Semgrep.