Developer Tools
A primary internal company segment within AI Agent Platforms, derived deterministically from the shared yc tag “Developer Tools”. This is a classification of current window members, not a causal layer or a separate time trend.
10/1328 → 19/964; +1.22 percentage points of formation share.
The open source AI-native security automation platform. Tracecat helps AI-native security teams build agents and automate work. Used by the most demanding security teams in mission-critical environments across defense, finance, federal and more. Open source and community driven at it's core: https://github.com/TracecatHQ/tracecat
AI system design tools for dev teams. Agentic Labs is making software design and architecture less painful by building AI into the process. Today, developers have no shortage of tools for instantly creating chunks of code, but designing the systems that integrate this code is the hardest and most manual part of software engineering. Our first product is Glide, an AI-first editor purpose-built for writing technical design docs. It connects to your codebase and saves your engineering team time on triage, planning, and implementation of complex code changes.
Cloud platform for coding agents. Ellipsis is a cloud platform that allows engineering teams to deploy fleets of coding agents. Each agent gets an isolated sandbox, scoped permissions, and hard budget caps. Full observability included. Get started with a $100 credit at www.ellipsis.dev. You can deploy agents for feature development, code review, and workflow automation. Creating an agent is simple: simply commit a YAML file to Github. Spawn agents from Github/Linear/Slack/etc., or via a REST API or our CLI. Organizations get full observability and governance of their cloud coding agents. Agent session logs are downloadable so companies own their own data. Full documentation: https://www.ellipsis.dev/docs
Agent-Driven Engineering. Navier AI is building the first Agent-Driven Engineering platform. We believe engineers should focus on designing great products, not wrestling with simulation software. Navier AI makes it simple to run CFD simulations at scale through our web-based platform built on OpenFOAM, the industry-standard solver for CFD. Our AI agents autonomously handle the complex, time-consuming steps of simulation—from geometry cleanup and meshing to solver configuration and cloud resource management. By automating the tedious parts of the workflow, we enable engineering teams to move faster, explore more design possibilities, and spend their time on high-value engineering decisions.
Agentic AI for Nursing Workflows. Kabilah is the most trusted enterprise-grade AI platform designed specifically for nursing workflows. We reduce burnout, enhance system efficiency, and enable high quality care.
Helps teams work effectively with AI coding agents.. We build coSlash, a management layer for AI coding agents. Our platform enables teams to orchestrate parallel Claude Code and Codex sessions, track project progress, team knowledge, and seamlessly transfer context between developers. https://coslash.io/
The complete agentic document platform. Reducto is the agentic document platform for leading AI teams building systems to automate document workflows at enterprise scale. Our platform provides a comprehensive toolkit for working with documents the way a human would, combining custom in-house and leading frontier models to power efficient and accurate document workflows. Reducto is trusted by leading AI teams at companies like Harvey, Scale AI, and Vanta. We are built for enterprise workloads with flexible deployment options from the cloud to fully air-gapped environments, SOC II and HIPAA compliance, and zero data retention. Learn more: https://reducto.ai/ Find our YC deal: https://reducto.ai/yc
AI operating system for veterinary care. Scritch is building the leading AI systems for veterinary medicine, starting with voice agents that automate front-desk operations in veterinary practices.
Specialized agents for real work. Opensteer creates specialized AI agents in cloud computers that can integrate with anything. Each agent gets customizable browser access, tools, instructions, and guardrails, so it can work 24/7 exactly the way you need.
AI-powered Infrastructure as Code PR reviews. Terracotta AI is an AI-powered Infrastructure as Code PR reviewer for Terraform, OpenTofu, and CDK-TF code, making Infrastructure as Code changes more transparent, less risky, and faster. Terracotta stops your Infrastructure as Code deployments from becoming ticking time bombs every time you modify your environment with AI-driven, contextual feedback delivered directly to your pull requests.
A primary internal company segment within AI Agent Platforms, derived deterministically from the shared yc tag “Developer Tools”. This is a classification of current window members, not a causal layer or a separate time trend.
A primary internal company segment within AI Agent Platforms, derived deterministically from the shared yc industry “Engineering, Product and Design”. This is a classification of current window members, not a causal layer or a separate time trend.
Measured-window members of AI Agent Platforms that could not be assigned to a narrower shared YC tag or industry without forcing a classification.
A primary internal company segment within AI Agent Platforms, derived deterministically from the shared yc tag “Automation”. This is a classification of current window members, not a causal layer or a separate time trend.
No comparable outside activity is connected yet.
These share a word with “AI Agent Platforms” but are tracked as separate categories. The real overlap below is the actual share of AI Agent Platforms’s companies also found in that category — not a guess.
Cambrian Signal, “AI Agent Platforms,” publication yc-2026-10-02-semantic-v8, snapshot October 2, 2026.
cambrian.jafar.com/formation/ai-agent-platforms