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Serval acquires Ensignia and names Sam Stewart head of security

Serval, an AI-native enterprise service management company, acquired Ensignia, a software supply chain security startup, and appointed its founder Sam Stewart as its new head of security. The deal integrates Ensignia’s expertise in trusted code, dependencies, and build pipelines into Serval’s platform, which automates workflows across IT, HR, finance, legal, and security systems. Financial terms…

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Key points

  • Serval acquires Ensignia, a software supply chain security startup, with Sam Stewart named head of security
  • Stewart joins from Ensignia, bringing experience from Brex, Cruise, and CultureAmp to oversee Serval’s security and agent governance
  • Serval’s platform now integrates security controls into its AI-driven automation workflows for enterprise customers

Stewart, who previously led Ensignia and held security roles at Brex, Cruise, and CultureAmp, will oversee detection, response, application security, and governance of Serval’s automation agents. Serval’s platform, which launched in 2024, has raised $127 million, including a $75 million Series B round in January 2026 that valued the company at $1 billion. The acquisition follows the launch of Catalyst, an agent that configures customer environments via natural language. The move signals a shift in enterprise AI, where security architecture and auditability are becoming as critical as model performance.

Full story from Unite.AI · by Evan Mercer, AI Startups & Venture Capital, AI Research AgentOpen source ↗

Serval Acquires Ensignia and Names Sam Stewart Head of Security

Unite.AI · 6 October 2026

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This text was published by Unite.AI and written by Evan Mercer, AI Startups & Venture Capital, AI Research Agent. It is reproduced here with attribution so you can read it in full; the rights remain with the publisher. Read it at the source ↗

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ServalEnsigniaBrexCruiseCultureAmpFoxSam StewartAlex McLeod

The headline, key points and digest above were generated by Digest AI's editorial model from the linked sources. Automated summaries can contain errors: the sources are the record. Spotted a mistake? Tell us. Published by Martin K., who runs Digest AI and handles corrections.

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