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Expel

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Expel

expel.io
HQ: Herndon, Virginia, United States
500
Security

Company research

Public company, workplace, funding, and market signals

Updated Aug 16, 2026

Overview

Expel is a privately held cybersecurity company providing managed detection and response (MDR). Its service combines 24/7 security monitoring, investigation, threat hunting, response, remediation guidance, and an AI-driven platform that works with customers’ existing security tools.

Primary product

Expel MDR, delivered through Expel Workbench and supported by security operations personnel and AI capabilities including Ruxie.

Founded

2016

Headquarters

12950 Worldgate Drive, Suite 200, Herndon, Virginia 20170, United States

Team size

201-500 employees

Work style

Flexible

Industry

Computer and Network Security

Sub-industry

Managed detection and response (MDR), managed security services, cybersecurity SaaS

Offices

Herndon, Virginia, United States

Business model

B2B subscription software and services
Managed security services
Channel and partner-led sales

Funding

Stage

Late-stage venture / Series E

Total raised

$288.8M

Latest round

Series E extension · Oct 2022

Latest amount

$31M

Series E extension

Oct 2022 · CapitalG and Paladin Capital Group

$31M

Series E

Sep 2021

$141.3M

Series D

May 2020

$50M

Series C

Jun 2019

$40M

Series B

Mar 2018

$20M

Series A

Aug 2016

$7.5M

People & investors

Leadership

Dave Merkel

Co-founder and Chief Executive Officer

Yanek Korff

Co-founder and Chief Operating Officer

Justin Bajko

Co-founder and Chief Strategy Officer

Greg Notch

Chief Technology Officer and Chief Security Officer

Scott Fuselier

Chief Revenue Officer; announced March 2025, with current-status ambiguity in later public profile data

Investors

Battery Ventures
CapitalG
Cisco Investments
Lightspeed Venture Partners
Paladin Capital Group
Scale Venture Partners

Work & culture

Expel publicly emphasizes practitioner-led security, transparency, customer outcomes, direct communication, and a human-in-the-loop approach to automation. Public employer-review data indicates relatively strong work-life balance and compensation scores, though the 2023 workforce reduction is a material counter-signal.

Work style

Flexible

Compensation

Public job-market data surfaced by Exa lists approximate annual salary signals of $58,254 for a Sales Development Representative, $90,901 for a Customer Success Manager, and $108,768 for an Engineer. These are third-party estimates rather than an official company compensation framework.

Benefits

At least two months of severance for U.S. employees affected by the 2023 reduction
Paid healthcare coverage through the end of 2023 for employees affected by the 2023 reduction
Adjusted option exercise timelines and vesting cliffs for eligible departing employees
Weekly lunch is referenced in public company metadata
Public employer-review signals show approximately 3.9/5 overall, with compensation around 4.4/5

Product & market

Pricing

Enterprise and commercial subscription pricing; public evidence indicates flexible offerings and add-on services, but no standard public price list was found.

Differentiators

  • —24/7 MDR combining human security practitioners with AI-driven automation
  • —Broad coverage across endpoint, cloud, identity, email, SaaS, network, and on-premises environments
  • —Works with customers’ existing security stack rather than requiring rip-and-replace
  • —Emphasis on full transparency into detections, investigations, and actions
  • —Expel Workbench provides a unified operational interface and reporting
  • —Publicly cited 23-minute critical-alert mean time to resolution in 2024 materials
  • —Expanding channel, MSSP, MSP, managed SIEM, and incident-response partner routes to market

Technology

Expel Workbench
Ruxie AI SOC manager
Python
Java
JavaScript
React
Angular
Django
Laravel
PostgreSQL
Kubernetes
TensorFlow
PyTorch
NumPy
MLflow
AWS-related infrastructure
GitHub
GitHub Actions
Linux
CrowdStrike integrations

Competitors

Arctic Wolf
eSentire
Alert Logic
Expel-like MDR and MSSP providers
Tracepoint
Minerva Engineering
IronNet Cybersecurity
SecureSky
Barracuda SKOUT Managed XDR

Scale & contact

Estimated revenue

Approximately $80 million-$90 million annually; Exa reported about $85 million.

Estimated monthly visits

56.4K

Traffic estimate as of Jun 2026

Signals & risks

Layoff
Jun 2023

Expel announced a reduction of roughly 10% of its approximately 600-person workforce, or about 60 employees, citing market shifts. The reduction occurred roughly eight months after a $31 million Series E extension.

Source

Latest news

Expel extends coverage to every stage of the threat lifecycle with new agentic AI capabilities

Expel · Jun 2026

Expel announced expanded Ruxie capabilities covering alert enrichment and triage, investigation, response actions, detection engineering, and documentation. The capabilities were described as being in production within existing MDR deployments.

Expel launches managed SIEM service for Sentinel and Splunk

IT Brief · Mar 2026

Expel launched managed SIEM services for customers using Microsoft Sentinel and Splunk Enterprise Security, initially as an add-on for Expel MDR customers.

Expel named a Leader in The Forrester Wave: Managed Detection and Response Services, Q1 2025

Business Wire · Feb 2025

The company reported that Forrester named Expel a Leader in its Q1 2025 MDR services evaluation, with strengths cited in areas including detection surfaces, analyst experience, integrations, and metrics.

Expel lays off 10% of workers eight months after raising $31 million

GovInfoSecurity · Jun 2023

Expel reduced its workforce by approximately 60 employees, or 10%, citing market shifts. The article also reported the company had raised nearly $290 million in total funding, including its $31 million Series E extension.

About/teamCareersCompany resources and newsEngineering and technology contentGitHub organization searchLinkedIn company pageOfficial websiteSEC filingsX/Twitter search
SourcesExpel official websiteExpel official resources and newsExpel careersExpel LinkedIn company pageExpel blogExpel team/about search sourceSEC EDGAR company filingsExpel Series A SEC Form DExpel Series B SEC Form DExpel Series C SEC Form DExpel Series D SEC Form DExpel Series E SEC Form DExpel leadership announcement for Scott FuselierExpel agentic AI announcementExpel flexible MDR offeringsExpel layoff reporting

Jobs and careers at Expel

8 jobs at Expel

Senior Deal Desk Manager

Remote
Sales
Remote
2w ago
Remote
Full-time
Apply

Senior Security Solutions Engineer

Remote
Customer Success
Remote
3w ago
Remote
Full-time
Apply

Managed SIEM Detection Engineer

Remote
Security
Remote
1mo ago
Remote
Full-time
Apply

Systems Engineer

Remote
Information Technology
Herndon, Virginia; Remote
1mo ago
Remote
Full-time
Apply

Product Manager, Integrations

Remote
Product
Remote
1mo ago
Remote
Full-time
Apply

Enterprise Account Executive - New England

Remote
Sales
Remote
1mo ago
Remote
Full-time
Apply

Customer Success Manager, Scale

Remote
Customer Success
Remote
1mo ago
Remote
Full-time
Apply

Join Our Community of Prospective Expletives

On-site
Herndon, Virginia
4mo ago
On-site
Full-time
Apply

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