Stairwell
stairwell.com
Actively hiring
Incident Response
Information Security
Cybersecurity
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Overview
News
Salaries
Products
People
Growth
Offices
Financials
Funding and backers
Total raised
$24.5M
2 rounds on record
Latest round
$20M
Series A · Sep 2021 · 5 yr ago
Team
51-200
employees, estimated range
Backers
1
Ballistic Ventures
The money's age
Long since its last round
60 months since the last round · not hiring
Momentum
15/100
in the news
Last sign of life
this month
a posting or a news item
The story so fareach stage dated by its source: the company's releases, the press, registers, filings
Sep 21, 2021
Raised a round Series A $20M · YahooFinance
Oct 28, 2020
Raised a round Seed $4.5M · led by Accel · Help Net Security
Tractionpublic signals, read monthly
Web presence
top 0.08%
of 133.2M domains by links, Common Crawl
Funding rounds
| Round | Date | Amount | Investors | Source |
|---|---|---|---|---|
| Series A | Sep 2021 | $20M | — | YahooFinance |
| Seed | Oct 2020 | $4.5M | Accel lead, Sequoia Capital, Gradient Ventures, Allen, Company | Help Net Security |
Backed byfrom the funds' portfolios and accelerator catalogs
Ballistic Ventures Similar startupsby what they do, their industry and backers
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News
From ClickFix to SilentEncryptor: A Simple Yet Destructive Path to Ransomware Deployment
Since May 2026, StopAndProtect has quietly compromised thousands of vulnerable WordPress sites in a sophisticated, multilayered campaign uncovered by CheckPoint. The initial vector is social engineering via CAPTCHA prompts, followed by a series of user-in
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Report
Your NDR Is Capturing Evidence of Threats You Haven't Found Yet
How Corelight and Stairwell Close the Loop on Network File Intelligence Every day, your network detection and response platform is extracting files from the wire through executables transferred over SMB, scripts pulled via FTP, email attachments traversin
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Report
How to Prevent a Ransomware Attack: 5 Steps to Find Threats Before Encryption Starts
Ransomware is often treated like a moment-in-time crisis: systems lock up, operations stop, and the organization moves into emergency response. But by the time files are encrypted, the attack has usually been underway for days, weeks, or longer.Modern ran
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Report
Stairwell Deep Dive: Understanding YARA at Scale
Why the Best Threat Hunting Tool Is Underused, and What Continuous File Intelligence FixesTL;DRYARA remains one of the most practical and expressive tools defenders have for identifying malware, but most teams still use it only surgically. The limitation
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Report
Stairwell Deep Dive: Understanding AI Triage
What it is? How it works? When to use it? TL;DR - Stairwell AI Triage is a labeled feature inside the Stairwell platform. It analyzes a file's structure, logic, and intent without executing it, and returns a plain-English explanation of what the file does
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