CalypsoAI vs Lakera

CalypsoAI was an AI security company founded in the US in 2018 by Neil Serebryany, its first CEO; it describes itself as founded in Silicon Valley, and its early press releases carry Washington datelines. It began with software for testing, validating and monitoring AI and machine learning models for national security, finance and other regulated customers, and moved to securing generative AI with CalypsoAI Moderator in 2023. Donnchadh Casey became CEO in August 2024. In October 2024 CalypsoAI named Dublin its global co-headquarters, alongside a US headquarters in New York; IDA Ireland says the CEO, the CTO and most of its R&D were based in Dublin. Paladin Capital Group led its $13 million Series A (July 2020) and a $23 million Series A-1 (June 2023), and F5 says it raised more than $40 million in venture funding. Investors also included Lockheed Martin Ventures and Hakluyt Capital. F5 announced on September 11, 2025 that it would acquire CalypsoAI for $180 million in purchase consideration, mostly cash. F5's 10-Q says the deal closed on September 26, 2025 and records $145.2 million in cash consideration. CalypsoAI is no longer sold separately: calypsoai.com now redirects to F5's AI Guardrails page. F5 introduced F5 AI Guardrails and F5 AI Red Team when it announced the close, and made both generally available in January 2026. Buyers should evaluate those products. **What it sold** By 2025 CalypsoAI sold an inference security platform with two main products. Inference Defend checked prompts and responses in real time to block prompt injection, jailbreaks and sensitive data leakage, using custom scanners that could be versioned, tested and enforced per project. Inference Red-Team ran automated and agent-driven multi-turn attacks, drawing on more than 10,000 new attack prompts a month, and produced a risk score. The platform logged AI interactions for audit, sent logs to Splunk, and ran as SaaS, on premises or hybrid. In August 2025 CalypsoAI said an on-premises version of Red-Team, for organizations with strict data residency or air-gapped requirements, would soon be available in early access. **Frameworks** In August 2025 CalypsoAI added an EU AI Act scanner package to Inference Defend, covering four Article 5 prohibited-practice categories: manipulation, social scoring, biometric data harvesting and surveillance. F5's deal announcement said its governance features help customers meet GDPR and EU AI Act requirements. We found no CalypsoAI mapping to the NIST AI RMF or ISO 42001.

Lakera is a Zurich-based AI security company founded in 2021 by former Google, Meta, and aerospace engineers. The company provides the Lakera Guard platform, which offers real-time prompt injection prevention, data leakage protection, jailbreak detection, and AI agent security for enterprise generative AI deployments. It operates across workforce AI security, AI agent security, and AI red teaming, with sub-50ms runtime latency and a SaaS-first, API-first architecture. Lakera is the creator of Gandalf, a widely used AI security educational game with over 1 million players and 80M+ prompts collected, which provides a continuously updated threat intelligence database. The company is cited in the OWASP LLM and GenAI Security Landscape Guide 2025, recognized as a Representative Vendor in the 2024 Gartner Innovation Guide for Generative AI (TRiSM), and had Lakera's CEO join the World Economic Forum 2024 alongside Yann LeCun and others. Named customers include Dropbox and a top-3 US bank.