Expel
Track on RadarManaged detection and response provider for security operations
- Total raised
- $288.8M
- Employees
- 478
- Founded
- 2016
- Momentum
- 36
Cooling
Data updated August 2026
About
About Expel
At a glance
Expel is a cybersecurity company specializing in Security Operations, founded in 2016 and headquartered in Herndon, United States. It has raised $288.8M in total funding, employs about 478 people, and is privately held.
Expel is a managed detection and response (MDR) company that provides security operations services to organizations. The company operates as a remote-first security provider with headquarters in Herndon, Virginia, and a distributed workforce across the United States and EMEA regions. Expel delivers security monitoring and incident response capabilities to help organizations detect and respond to security threats. The company positions itself as an extension of customer security teams, handling security operations tasks that would traditionally require in-house security operations center (SOC) staff. Their service model focuses on investigating security alerts, identifying genuine threats, and providing remediation guidance to customers. The company emphasizes a people-centric approach to both employee culture and customer service delivery. Expel's operational model is built around treating security operations as a managed service, allowing organizations to outsource their security monitoring and response functions rather than building and maintaining internal capabilities. Expel serves organizations that need security operations capabilities but may lack the resources, expertise, or desire to build and staff their own security operations centers. The company's service delivery includes 24/7 monitoring, threat investigation, incident response, and security guidance provided by their team of security analysts and engineers.
Momentum
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Valuation
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Funding
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Privately held
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FAQ
Frequently asked questions about Expel
When was Expel founded?▾
Expel was founded in 2016.
Where is Expel headquartered?▾
Expel is headquartered in Herndon, United States.
How much funding has Expel raised?▾
Expel has raised a total of $288.8M in total funding.
Is Expel public or private?▾
Expel is a privately-held company.
How many employees does Expel have?▾
Expel has approximately 478 employees.
What does Expel do?▾
Expel is a managed detection and response (MDR) company that provides security operations services to organizations. The company operates as a remote-first security provider with headquarters in Herndon, Virginia, and a distributed workforce across the United States and EMEA regions. Expel delivers…