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Sublime Security provides email security software that detects and blocks phishing, malware, and other threats.
Founded in Washington in 2019 by CEO Joshua Kamdjou and COO Ian Thi, Sublime Security develops cybersecurity software focused on email threats. Its platform addresses phishing, malware, ransomware, impersonation, and business email compromise, and includes threat hunting and reporting tools. In October 2025, it raised USD 150 million in Series C funding led by Georgian, with 01A, Avenir Growth Capital, Citi Ventures, Index Ventures, Institutional Venture Partners, and Slow Ventures participating.
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