Smarter than an online virus scanner. Just as easy.

Every file has a backstory.
Stairwell Intelligent Analysis will tell you if it’s safe.

Upload any program or script. Our AI and LLM system goes beyond basic verdicts — telling you what it does, and why it matters.

Free online file scan. No signup. Just real answers.

The Problem

Security teams are overwhelmed.

Too many false positives
Not enough clarity
No easy way to revisit past threats
No visibility into the files behind the alerts

Traditional security tools give you logs, but not the content that matters. They don’t actually analyze the files that actually entered your environment. That means threats can linger undetected or resurface long after the initial alert.


What SIA Delivers

When a file raises questions, SIA helps you get answers—fast. Upload any file and get immediate clarity, enriched by one of the largest malware, DNS, and YARA rule datasets available. Whether the threat is new or resurfacing, you’ll know exactly what you’re dealing with.

Triage alerts instantly

No more waiting days for clarity

Enrich every alert  

We go beyond logs to analyze the raw files

Identify novel malware

Catch and understand even AI-generated threats your other tools miss

Scale your team's impact  

Work faster without adding headcount

Create repeatable workflows 

We go beyond logs to analyze the raw files

How it works

Stairwell Intelligent Analysis extends beyond log analysis to digest the raw files that actually trigger the alert. It automatically leverages 1+billion pieces of malware, 2+trillion DNS records, and hundreds of millions of YARA rule matches to provide unparalleled analysis.

This short demo shows how fast your team can go from alert to answers when you stop guessing and start analyzing the file itself.

SIA integrates directly with your SIEM and EDR.

What makes

SIA different

Modern threats don’t play by old rules. Attackers are now using AI to generate novel malware that evades traditional detection. SIA helps you spot what others miss, so you’re not flying blind when the next variant hits.


By analyzing the actual file, not just the logs, SIA reveals malicious behavior, even in never-before-seen samples. That includes polymorphic, obfuscated, and AI-generated malware your other tools can't catch.


SIA gives your SOC a clearer path to action:

       Immediate insight into unknown files

       Context-rich analysis drawn from massive threat datasets

       Workflow-ready results that fit into your existing stack


Built by the founder of Google’s Threat Analysis Group and Chronicle, Stairwell is trusted by the world’s top security teams to stay ahead of the threats no one else sees.