# FYEO Custom Fuzz Testing vs Plainsea Agentic Penetration Testing Platform: side-by-side comparison (2026) [FYEO Custom Fuzz Testing](https://cybersectools.com/tools/fyeo-custom-fuzz-testing) is a commercial [smart-contract scanning & dev security](https://cybersectools.com/categories/smart-contract-scanning) solution by [FYEO](https://cybersectools.com/companies/fyeo). [Plainsea Agentic Penetration Testing Platform](https://cybersectools.com/tools/plainsea-agentic-penetration-testing-platform) is a commercial [penetration testing](https://cybersectools.com/categories/pentesting-tools) solution by [Plainsea](https://cybersectools.com/companies/plainsea). Features, integrations, deployment and the company behind each one, side by side. ## Side-by-side comparison | | FYEO Custom Fuzz Testing | Plainsea Agentic Penetration Testing Platform | |---|---|---| | Pricing model | Commercial | Commercial | | Category | Smart-Contract Scanning & Dev Security | Penetration Testing | | Verified | No | No | | Deployment type | Hybrid | Cloud | | Company size fit | Mid-Market, Enterprise | Mid-Market, Enterprise | | Company | FYEO | Plainsea | | Headquarters | – | – | ### Use cases and capabilities | | FYEO Custom Fuzz Testing | Plainsea Agentic Penetration Testing Platform | |---|---|---| | Fuzzing | Yes | – | | CI/CD | Yes | – | | AI Pentesting | – | Yes | | Penetration Testing Framework | – | Yes | | Continuous Testing | – | Yes | | Red Team | – | Yes | | Agentic AI Security | – | Yes | | Vulnerability Prioritization | – | Yes | | Security Reporting | – | Yes | | VAPT | – | Yes | | Security Validation | – | Yes | ### Core features **FYEO Custom Fuzz Testing** 8 features listed. Sign in on the page to see them. **Plainsea Agentic Penetration Testing Platform** 10 features 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. - [FYEO Custom Fuzz Testing](https://cybersectools.com/tools/fyeo-custom-fuzz-testing) fits if you need both cloud and on-premises options. - [Plainsea Agentic Penetration Testing Platform](https://cybersectools.com/tools/plainsea-agentic-penetration-testing-platform) fits if you want a cloud product. ## FYEO Custom Fuzz Testing vs Plainsea Agentic Penetration Testing Platform FAQ Common questions when comparing FYEO Custom Fuzz Testing vs Plainsea Agentic Penetration Testing Platform for smart-contract scanning & dev security. ### What is the difference between FYEO Custom Fuzz Testing and Plainsea Agentic Penetration Testing Platform? **FYEO Custom Fuzz Testing**: Custom blockchain fuzz testing service with bespoke harnesses & CI integration. Built by FYEO. **Plainsea Agentic Penetration Testing Platform**: Agentic AI platform for continuous, full-lifecycle penetration testing. Built by Plainsea. The table above shows where their features, integrations, deployment and company size fit differ. ### Who makes FYEO Custom Fuzz Testing and Plainsea Agentic Penetration Testing Platform? **FYEO Custom Fuzz Testing** is made by FYEO. **Plainsea Agentic Penetration Testing Platform** is made by Plainsea. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit. ### Is FYEO Custom Fuzz Testing a good alternative to Plainsea Agentic Penetration Testing Platform? In part. FYEO Custom Fuzz Testing and Plainsea Agentic Penetration Testing Platform are not in the same category on CybersecTools. Use the table above to see where features, deployment and company size fit differ. ## Related comparisons - [FYEO Custom Fuzz Testing vs Olympix Enterprise-Grade Security Tools](https://cybersectools.com/compare/fyeo-custom-fuzz-testing-vs-olympix-enterprise-grade-security-tools) - [FYEO Custom Fuzz Testing vs Dedge Security W3SPM](https://cybersectools.com/compare/dedge-security-w3spm-vs-fyeo-custom-fuzz-testing) - [FYEO Custom Fuzz Testing vs CredShields SolidityScan](https://cybersectools.com/compare/credshields-solidityscan-vs-fyeo-custom-fuzz-testing) - [Plainsea Agentic Penetration Testing Platform vs Olympix Enterprise-Grade Security Tools](https://cybersectools.com/compare/olympix-enterprise-grade-security-tools-vs-plainsea-agentic-penetration-testing-platform) - [Plainsea Agentic Penetration Testing Platform vs Dedge Security W3SPM](https://cybersectools.com/compare/dedge-security-w3spm-vs-plainsea-agentic-penetration-testing-platform) - [Plainsea Agentic Penetration Testing Platform vs CredShields SolidityScan](https://cybersectools.com/compare/credshields-solidityscan-vs-plainsea-agentic-penetration-testing-platform) ## Alternatives to each - [See all FYEO Custom Fuzz Testing alternatives](https://cybersectools.com/alternatives/fyeo-custom-fuzz-testing) - [See all Plainsea Agentic Penetration Testing Platform alternatives](https://cybersectools.com/alternatives/plainsea-agentic-penetration-testing-platform) --- Source: https://cybersectools.com/compare/fyeo-custom-fuzz-testing-vs-plainsea-agentic-penetration-testing-platform For AI agents: each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/fyeo-custom-fuzz-testing.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md. More on FYEO Custom Fuzz Testing and Plainsea Agentic Penetration Testing Platform: 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