Stairwell

Continuously collects and reanalyzes every executable in an environment to catch missed threats.

Stairwell takes a file-centric approach to detection. It copies every executable and related file from an environment into a private repository, then reanalyzes them continuously as new intelligence arrives, catching malware that slipped past defenses when it first landed. Founded by former Google security leaders, it complements EDR tooling.

Category: Threat Intel & DFIR
Founded: 2019
Funding: $70M raised (Series B, 2022)
Website: https://stairwell.com

Seen at Black Hat USA 2026 (AI Zone sponsor, booth 5006).

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