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Depthfirst's Expansion in AI-Driven Security Models

3 April 2026 by
TechStora

New Milestone in AI-Driven Security Investments

Depthfirst has successfully secured $80 million in Series B funding, propelling its total fundraising to $120 million within a brief three-month period. This achievement follows its Series A funding round in January, highlighting the confidence investors have in the company's vision. The investment was led by Meritech Capital, with participation from Forerunner Ventures, The House Fund, and prior investors such as Accel and Liquid 2 Ventures. Depthfirsts San Francisco headquarters serves as the innovation hub for its applied AI initiatives in security.

The company was founded in 2024 by a team of technical leaders from DeepMind, Databricks, and Faire, with a mission to address systemic vulnerabilities across software and infrastructure. This latest influx of funding is earmarked for scaling their research and development efforts, training additional security models, and driving enterprise adoption of their security solutions.

Introduction of Dfsmini1: A Specialized Security Model

Accompanying the funding announcement, Depthfirst unveiled Dfsmini1, its first proprietary security model. This model is specifically engineered to address security challenges in cryptocurrency smart contracts, a domain that has become increasingly vulnerable to sophisticated exploits. Dfsmini1 is built upon an open-source foundation and trained in security-specific environments, ensuring its applicability to real-world scenarios.

What distinguishes Dfsmini1 is its ability to generalize across security domains. The training methodologies employed allow it to extend its utility beyond smart contracts, offering a versatile tool for addressing diverse security challenges. This capability marks a significant step in integrating specialized intelligence into practical security workflows.

Focus on Specialized Data and Evaluation

Depthfirst emphasizes the importance of domain-specific data and tailored evaluation metrics in building effective security models. The companys approach integrates deep post-training expertise to ensure these models are fine-tuned for nuanced security applications. This specialization is critical for addressing the unique challenges presented by modern software vulnerabilities.

Depthfirsts leadership team asserts that their capacity to build and train these advanced models sets them apart in the competitive security landscape. By leveraging tailored datasets and evaluation protocols, they aim to provide solutions that are both precise and scalable across industries.

Scaling Enterprise Adoption

The newly acquired funding will also support Depthfirsts efforts to scale enterprise adoption. The company plans to integrate its security models into products designed to align with real-world security workflows. These efforts are aimed at providing enterprises with actionable solutions that reduce vulnerabilities and enhance operational resilience.

Depthfirsts strategy includes collaborating with enterprise clients to adapt its models for specific use cases. This client-centric approach ensures that the models are not only technically advanced but also highly relevant to the evolving challenges faced by businesses.

Future Directions in AI Security

Depthfirsts roadmap indicates a strong commitment to expanding its AI research team and training additional models across new security domains. These efforts are geared towards addressing broader categories of vulnerabilities, from infrastructure layers to complex software ecosystems.

The companys ability to innovate in training methodologies and domain-specific security applications positions it as a leader in AI-driven security. By continually refining its models and expanding their applicability, Depthfirst aims to redefine how enterprises approach software and infrastructure protection.