Defender Lens is a commercial detection engineering solution by DefenderLens. FireEye Mandiant SunBurst Countermeasures is a free detection engineering solution by Google. Features, integrations, deployment and the company behind each one, side by side.
Turn Any Threat into a Detection Rule
FireEye Mandiant SunBurst Countermeasures: freely available rules for detecting malicious files and activity
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Based on what each listing shows: deployment, company size, price and open source.
Defender Lens fits if you want a cloud product.
FireEye Mandiant SunBurst Countermeasures fits if you need to run it on your own servers, you are a startup or a small business, you need a free product and you want an open-source product.
Common questions when comparing Defender Lens vs FireEye Mandiant SunBurst Countermeasures for detection engineering.
Defender Lens: Turn Any Threat into a Detection Rule, built by DefenderLens.
FireEye Mandiant SunBurst Countermeasures: FireEye Mandiant SunBurst Countermeasures: freely available rules for detecting malicious files and activity, built by Google.
The table above shows where their features, integrations, deployment and company size fit differ.
Defender Lens is made by DefenderLens founded in 2025-01-01T00:00:00.000Z. FireEye Mandiant SunBurst Countermeasures is open-source with 560 GitHub stars. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.
Often, yes. Defender Lens and FireEye Mandiant SunBurst Countermeasures are both Detection Engineering products, and both cover Rules. Key differences: Defender Lens is Commercial while FireEye Mandiant SunBurst Countermeasures is Free, FireEye Mandiant SunBurst Countermeasures is open-source. Use the table above to see where features, deployment and company size fit differ.
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Updated 2026-11-02
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