How many employees work at Mimecast UK?

Mimecast UK Ltd. has 3,356 employees, according to Revelio Labs workforce intelligence data. The YoY growth rate is -7.9%.

Data source: Revelio Labs Coverage: Global workforce Latest update: September 2025

About Mimecast UK

Mimecast: Work Protected Since 2003, Mimecast has stopped bad things from happening to good organizations by enabling them to work protected. We empower more than 40,000 customers to help mitigate risk and manage complexities across a threat landscape driven by malicious cyberattacks, human error, and technology fallibility. Our advanced solutions provide the proactive threat detection, brand protection, awareness training, and data retention capabilities that evolving workplaces need today. Mimecast solutions are designed to transform email and collaboration security into the eyes and ears of organizations worldwide. For help, please email support@mimecast.com.

As of September 2025

Mimecast UK
workforce metrics

Headcount

3.4k

Avg. Salary

$113.8k

Tenure

3.0yr

Growth Rate

-7.9%

Hiring Rate

Attrition Rate

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Employee Headcount

Interactive chart of Mimecast UK annual worldwide employee count from 2023 to 2025.

  • Mimecast UK total number of employees in 2025 was 3,401.552, a 7.9% decline from 2024.
  • Mimecast UK total number of employees in 2024 was 3,501.501, a 2.7% decline from 2023.
  • Mimecast UK total number of employees in 2023 was 3,561.437, a 0.6% decline from 2022.

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Employee Geographic Breakdown

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Employee Role Breakdown

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Employee Compensation

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Active Job Postings

Interactive chart of Mimecast UK annual active job postings from 2023 to 2025.

  • Mimecast UK active job postings in 2025 was 839, a 17.8% increase from 2024.
  • Mimecast UK active job postings in 2024 was 315, a 44.4% decline from 2023.
  • Mimecast UK active job postings in 2023 was 495, a 47.7% decline from 2022.

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Employee Sentiment

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