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F5, a global leader in application and API security, announced its intent to acquire CalypsoAI, a pioneer in enterprise AI security, for $180 million. This acquisition will integrate CalypsoAI’s advanced AI inference security solutions into F5’s Application Delivery and Security Platform (ADSP), creating a comprehensive solution to protect AI applications from emerging threats.
F5 to acquire CalypsoAI for $180 million, closing by September 30, 2025.
CalypsoAI’s platform offers real-time threat defense and data security.
Integration enhances F5’s ADSP for securing AI inference across environments.
Protects against AI-specific threats like prompt injection and jailbreak attacks.
Ensures compliance with GDPR and EU AI Act through unified governance.
CalypsoAI named a 2025 RSAC Innovation Sandbox Top-Two Finalist.
As enterprises rapidly adopt generative and agentic AI, they face a dynamic attack surface that traditional security measures struggle to protect. “AI is redefining enterprise architecture—and the attack surface companies must defend,” said François Locoh-Donou, President and CEO of F5. CalypsoAI’s platform addresses this by offering real-time threat defense, proactive red-teaming, and data security, enabling secure AI deployment across SaaS, on-premises, and hybrid environments.
CalypsoAI’s platform delivers model-agnostic security, ensuring flexibility across AI models and cloud providers. Key features include:
Adversarial Threat Protection: Defends against AI-specific threats like prompt injection and jailbreak attacks, with over 10,000 new attack prompts tested monthly to generate risk scores.
Secure Data: Implements guardrails to prevent data leakage and policy violations, auditing AI interactions in real time.
Unified Visibility and Governance: Provides centralized observability and audit logs to meet GDPR and EU AI Act requirements, as highlighted in Gartner’s 2025 Market Guide for AI Trust, Risk, and Security Management (TRiSM).
“Enterprises want to move fast with AI while reducing the risk of data leaks, unsafe outputs, or compliance failures,” said Donnchadh Casey, CEO of CalypsoAI. The integration with F5’s ADSP will combine high-performance application delivery with robust AI security, enabling faster innovation without compromising safety.
F5 will acquire all shares of CalypsoAI, a Dublin-based company founded in 2018, for $180 million in cash. The transaction, expected to close by September 30, 2025, is anticipated to have minimal impact on F5’s revenue and operating results. CalypsoAI, backed by over $40 million in venture funding from investors like Paladin Capital Group and Lockheed Martin Ventures, was a Top-Two Finalist in the 2025 RSAC Innovation Sandbox and named one of Fast Company’s Most Innovative Companies in AI for 2025.
The acquisition aligns with F5’s strategy to bolster its AI security offerings, addressing the growing demand for secure AI deployment. As shown in the finance card above, F5’s stock (FFIV) closed at $334.59 on September 11, 2025, up from the previous day’s close of $326.69, reflecting a positive market response to the announcement. Over the past year, FFIV’s stock has risen from $220.20 in September 2024 to $334.59, indicating strong growth and investor confidence.
The acquisition positions F5 as a leader in AI security, addressing critical enterprise needs for scalability, flexibility, and trust in AI systems. By integrating CalypsoAI’s capabilities, F5 enhances its ability to secure applications, APIs, and AI models, helping enterprises navigate regulatory pressures and mitigate risks like shadow AI usage. This move strengthens F5’s competitive edge in the evolving cybersecurity landscape, ensuring businesses can innovate securely.
F5, Inc. (NASDAQ: FFIV) is the global leader in delivering and securing every app. Backed by three decades of expertise, F5 has built the industry’s premier platform—F5 Application Delivery and Security Platform (ADSP)—to deliver and secure every app, every API, anywhere: on-premises, in the cloud, at the edge, and across hybrid, multicloud environments. F5 is committed to innovating and partnering with the world’s largest and most advanced organizations to deliver fast, available, and secure digital experiences.
CalypsoAI provides the only full-lifecycle platform to secure AI models and applications at the inference layer, deploying Agentic Warfare™ to protect organizations from evolving adversaries. Trusted by global enterprises including Palantir and SGK, CalypsoAI’s industry-leading team ensures security keeps pace with AI innovation.
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