What is Stairwell?

Stairwell is a cybersecurity platform built to give security teams deep, continuous visibility into every file across their environment -- past and present. It collects files from endpoints, stores them in a private cloud vault, and applies automated analysis to every object at ingestion. The result is a searchable, historically complete record of every executable and executable-like file your organization has ever seen.

What Stairwell Does

Stairwell shifts file analysis off the endpoint and into a private cloud. A lightweight forwarder installed on your assets collects files and uploads them to your Stairwell environment. Once ingested, every file is analyzed by Mal-Eval (Stairwell's proprietary ML engine), scanned against active YARA rules, checked against published threat intelligence, and compared to a global corpus of over 630 million objects for variant discovery.

This means your security team can search, hunt, and investigate across your full file inventory without relying on endpoint resources or real-time alert windows.

How It Works

1. Collect -- Lightweight forwarders installed on endpoints monitor file activity and upload newly discovered executables, libraries, and scripts to Stairwell.
2. Analyze -- Every ingested file is scored by Mal-Eval, matched against YARA rules, and compared to known malware families for variant detection.
3. Investigate -- Search across your full file history using hashes, YARA rules, natural language queries, or structured filters. Check where a file appeared, when it was first seen, and whether it matches known threat reports.
4. Respond -- Export findings to threat reports, trigger alerts through integrations, or use the API to connect Stairwell data into your existing SIEM, SOAR, and EDR workflows.

What Makes It Different

Out-of-band analysis. All file analysis happens in Stairwell's cloud, not on the endpoint. There is no performance impact to host systems, which makes Stairwell suitable for environments where traditional EDR is too resource-intensive -- including OT systems and appliances.

Retrospective hunting. Stairwell retains every file ever collected. When a new threat is published, you can immediately check whether any variant has appeared in your environment at any point in the past -- not just since the last alert window.

Variant discovery. Mal-Eval compares every file against hundreds of millions of known objects to surface unknown variants of known malware families, even before those variants are publicly documented.

Private malware vault. Your files are stored in an isolated, private environment. Stairwell does not share your data with other customers or public repositories.

Works alongside existing tools. Stairwell is not a replacement for EDR or XDR. It runs in parallel, covering the gaps that endpoint agents miss due to resource and time constraints.

Who Uses It

Stairwell is used by security operations teams, threat hunters, and incident responders at organizations ranging from mid-market to Fortune 500. Common use cases include threat hunting, incident scoping, malware analysis, breach assessment, and compliance-driven file auditing.