guardrails
(4)
Alice (Formerly ActiveFence)
Alice, formerly ActiveFence, is an Israeli-American AI safety and security company that acts as a protective layer for online platforms and AI systems. Founded in 2018, it uses a decade of real-world abuse intelligence to detect and stop harms such as fraud, deepfakes, child exploitation, disinformation, prompt-injection attacks, and jailbreaks. Its technology helps protect roughly 3 billion people and secures 7 of the 10 largest AI foundation models, serving customers including Amazon, TikTok, Nvidia, and Cohere.
Vijil
Vijil is a Menlo Park-based AI company building trust infrastructure for enterprise AI agents. Founded in 2023 by senior AWS leaders, its modular platform tests, defends, and continuously hardens agents so they are verifiably reliable, secure, and safe - cutting the time it takes enterprises to trust an agent from about six months to six weeks. Vijil raised $17 million in 2025 (total $23 million) and was named a Gartner Cool Vendor.
Resourcely (acquired by Anysphere)
Resourcely was a San Francisco cybersecurity startup that made cloud infrastructure secure and compliant by design. Its platform paired Blueprints - self-service templates that generate golden-path Terraform and OpenTofu - with Guardrails, a policy engine written in a human-friendly language called Really that catches misconfigurations before deployment. Founded in 2022 by Travis McPeak and Aladdin Almubayed and backed by $8M in seed funding, Resourcely was acquired by Anysphere (maker of the AI code editor Cursor) in July 2025, with McPeak joining to lead Cursor's security efforts.
David Bild
David Bild is a technical co-founder and engineering leader at Resourcely, the cloud-security startup acquired by Anysphere (maker of Cursor) in July 2025. A Ph.D. computer engineer who once designed censorship-resistant networks, he has spent his career turning gnarly security problems into guardrails developers actually want to use - from overlay networking for IoT at Xaptum to secure-by-design Terraform blueprints at Resourcely. Post-acquisition he works on Fraim, an open-source, genAI-based application- and cloud-security tool. He builds from a cabin-adjacent base in Southwest Harbor, Maine, on the doorstep of Acadia.