tCell is a next-gen web app firewall for the cloud designed to overcome the limitations of traditional Web Application Firewalls.

tCell moves application security out of the network for cloud-first organizations. Using advanced Runtime Application Self-Protection functionality, tCell secures web applications in production using server-side instrumentation, browser-side instrumentation, and cloud-based analytics.

tCell was founded in 2014 by Boris Chen & Michael Feiertag and is based in San Francisco, California, United States.

tCell is the only solution for companies leveraging DevOps, Agile, or microservices to protect their applications without code or network changes.

tCell’s flexible deployment models enable Security and DevOps organizations to deploy industry-leading security alongside mission-critical applications and used by leading organizations like Veeva, Zenefits, and John Muir Health.


tCell is funded by Menlo Ventures and led by executives from Splunk, Okta, and Skyhigh Networks.


tCell was acquired by Rapid7 on Oct 15, 2018 for an undisclosed amount.




  • Year founded: 2014
  • Funding Info: $9.4M in a single
  • Yearly Revenue: NA
  • Employee Size: 51-200
  • Business Valuation: NA
  • City/Town: San Francisco
  • State: California
  • Country: United States
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