# 1 Best Open Source Alternative for AWS GuardDuty

Canonical: https://caniforkit.com/aws-guardduty
Last updated: 2026-11-07

Looking for the best open source alternative for AWS GuardDuty? Compare 1 verified free and open source alternatives to AWS GuardDuty (ProjectDiscovery) with license details, self-hosting requirements, and practical trade-offs.

## AWS GuardDuty Overview & Subscription Cost
- **Product**: AWS GuardDuty
- **Category**: [monitoring](https://caniforkit.com/category/monitoring)
- **Paid Subscription Price**: $35/month per seat
- **1-Seat Annualized Cost**: $420/year
- **5-Person Team Annualized Cost**: $2,100/year
- **10-Person Team Annualized Cost**: $4,200/year
- **Can I Vibe-Code / Rebuild It Myself?**: NO (use a free alternative, save the tokens)
- **Rebuild Verdict**: Instead of paying recurring SaaS fees for AWS GuardDuty or rebuilding it from scratch, deploy one of the 1 battle-tested open-source alternatives like ProjectDiscovery.

## Verified Free & Open Source Alternatives

| Alternative | Type | License | Runs On | GitHub Stars | Head-to-Head |
| --- | --- | --- | --- | --- | --- |
| [ProjectDiscovery](https://caniforkit.com/fork/projectdiscovery) | Open Source | Open Source | Local | ★ 32.7k | [Compare vs AWS GuardDuty](https://caniforkit.com/vs/aws-guardduty-vs-projectdiscovery) |

## In-Depth Alternative Profiles

### ProjectDiscovery
- **Fork Page**: [ProjectDiscovery Profile](https://caniforkit.com/fork/projectdiscovery)
- **Head-to-Head Comparison**: [AWS GuardDuty vs ProjectDiscovery](https://caniforkit.com/vs/aws-guardduty-vs-projectdiscovery)
- **Official Website**: https://projectdiscovery.io
- **Source Code Repository**: https://github.com/projectdiscovery/nuclei
- **License**: Open Source
- **Runs On**: Local
- **GitHub Stars**: 32.7k
- **Maintenance Activity**: nov 2026
- **Supported Platforms**: desktop, cross-platform, one-click install
- **Summary**: Monitor infrastructure for exploitable vulnerabilities with real-time detection, automated workflows, and zero false positives.
- **The Catch vs AWS GuardDuty**: Community-driven open source project without dedicated enterprise SLAs.
- **Installation**: Clone https://github.com/projectdiscovery/nuclei or deploy with Docker Compose
- **Setup**: Download the native package or installer for your operating system.
- **Data Storage**: All application data lives locally on your own machine.

## Frequently Asked Questions

### What is the best free alternative to AWS GuardDuty?
The top free alternative to AWS GuardDuty is ProjectDiscovery (open source, Open Source). Monitor infrastructure for exploitable vulnerabilities with real-time detection, automated workflows, and zero false positives.

### How much does switching from AWS GuardDuty to a free alternative save?
AWS GuardDuty starts at $35/month per seat ($420/year). Switching a 5-person team to a free alternative like ProjectDiscovery saves $2,100 per year in software subscription fees.

### What is the catch when switching away from AWS GuardDuty?
While ProjectDiscovery replaces core AWS GuardDuty features without subscription fees, the real-world trade-off is: Community-driven open source project without dedicated enterprise SLAs.

## Related

- [monitoring Software Category Hub](https://caniforkit.com/category/monitoring)
- [All Paid SaaS Alternatives Index](https://caniforkit.com/alternatives)
- [Self-Hosted Software Directory](https://caniforkit.com/self-hosted)
- [Homepage](https://caniforkit.com)