# Insider vs QuestorAI: side-by-side comparison (2026)

[Insider](https://cybersectools.com/tools/insider) is a free [static application security testing](https://cybersectools.com/categories/sast) solution. [QuestorAI](https://cybersectools.com/tools/questorai-vulndna) is a commercial [static application security testing](https://cybersectools.com/categories/sast) solution by [QuestorAI](https://cybersectools.com/companies/questorai). Features, integrations, deployment and the company behind each one, side by side.

Need the answer fast? [Best SAST Solutions for Business](https://cybersectools.com/shortlists/best-sast-solutions) picks Checkmarx One Application Security Platform, Veracode Application Risk Management Platform, OpenText Fortify SAST and 4 more.

## Side-by-side comparison

| | Insider | QuestorAI |
|---|---|---|
| Pricing model | Free | Commercial |
| Category | Static Application Security Testing | Static Application Security Testing |
| Verified | No | No |
| Deployment type | On-Premises | Cloud |
| Company size fit | Startup, SMB, Mid-Market, Enterprise | SMB, Mid-Market, Enterprise |
| GitHub stars | 550 | – |
| Last commit | Jan 2021 | – |
| Company | – | QuestorAI |
| Headquarters | – | – |

### Use cases and capabilities

| | Insider | QuestorAI |
|---|---|---|
| DevSecOps | Yes | – |
| Source Code Analysis | Yes | Yes |
| OWASP | Yes | Yes |
| SAST | Yes | Yes |
| Injection | – | Yes |
| SQL Injection | – | Yes |
| XSS | – | Yes |
| SSRF | – | Yes |
| Authorization | – | Yes |
| Dependency Scanning | – | Yes |
| CI/CD | – | Yes |

### Core features

**Insider**

No features listed.

**QuestorAI**

10 features listed. Sign in on the page to see them.

### Integrations

**Insider**

No integrations listed.

**QuestorAI**

2 integrations listed. Sign in on the page to see them.

## Which one fits you

Based on what each listing shows: deployment, company size, price and open source.

- [Insider](https://cybersectools.com/tools/insider) fits if you need to run it on your own servers, you are a startup, you need a free product and you want an open-source product.
- [QuestorAI](https://cybersectools.com/tools/questorai-vulndna) fits if you want a cloud product.

## Insider vs QuestorAI FAQ

Common questions when comparing Insider vs QuestorAI for static application security testing.

### What is the difference between Insider and QuestorAI?

**Insider**: Insider is an open-source CLI tool that performs static source code analysis to detect OWASP Top 10 vulnerabilities across multiple programming languages including Java, Kotlin, Swift, .NET, C#, and JavaScript.

**QuestorAI**: Neuro-symbolic SAST that finds, proves, fixes and verifies code vulnerabilities. Built by QuestorAI.

The table above shows where their features, integrations, deployment and company size fit differ.

### Who makes Insider and QuestorAI?

**Insider** is open-source with 550 GitHub stars. **QuestorAI** is made by QuestorAI. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is Insider a good alternative to QuestorAI?

Often, yes. Insider and QuestorAI are both Static Application Security Testing products, and both cover SAST, Source Code Analysis, OWASP. Key differences: Insider is Free while QuestorAI is Commercial, Insider is open-source. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [Insider vs SonarSource SonarQube](https://cybersectools.com/compare/insider-vs-sonarqube-server)
- [Insider vs Gecko Security](https://cybersectools.com/compare/gecko-security-vs-insider)
- [Insider vs COGICEO Audits de code source](https://cybersectools.com/compare/cogiceo-audits-de-code-source-vs-insider)
- [QuestorAI vs SonarSource SonarQube](https://cybersectools.com/compare/questorai-vulndna-vs-sonarqube-server)
- [QuestorAI vs Gecko Security](https://cybersectools.com/compare/gecko-security-vs-questorai-vulndna)
- [QuestorAI vs COGICEO Audits de code source](https://cybersectools.com/compare/cogiceo-audits-de-code-source-vs-questorai-vulndna)

## Alternatives to each

- [See all Insider alternatives](https://cybersectools.com/alternatives/insider)
- [See all QuestorAI alternatives](https://cybersectools.com/alternatives/questorai-vulndna)

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Source: https://cybersectools.com/compare/insider-vs-questorai-vulndna

For AI agents: each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/insider.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md.

More on Insider and QuestorAI: funding, momentum, hiring and news, plus the full product and company record, are available through the Mandos MCP Server (paid plans), which connects to AI assistants: https://mandos.io/mcp?utm_source=cybersectools.com&utm_medium=compare-md