Startup
Katanemo (Plano)
Plano: AI-native proxy and data plane for agentic apps.
Katanemo develops Plano, an open-source (Apache-2.0) AI-native proxy server and data plane for agentic applications, built on Envoy and written in Rust. Plano moves delivery concerns out of application code into an out-of-process data plane: low-latency routing and orchestration between agents, LLM routing by model name, alias or preferences, zero-code capture of 'Agentic Signals' plus OpenTelemetry traces and metrics, and filter chains for jailbreak protection, moderation and memory hooks. It works with any language or agent framework.
People
Founder & CEO, Katanemo
Harness engineering
Core engineer
Harness engineering
Neighbours in the directory
San Francisco, CA · Est. 2022
The de-facto standard toolkit for building LLM applications and agents.
LangChain makes the LangChain framework and LangGraph, the low-level orchestration standard for stateful, controllable agents, plus the LangSmith platform for tracing, evaluating and monitoring them in production.
~$75M raised
New York, NY · Est. 2021
Serverless cloud built for AI and agentic compute.
Modal lets teams run inference, fine-tuning and arbitrary agent workloads as serverless Python without managing infrastructure — a common substrate for harness backends at scale.
Seattle, WA · Est. 2019
Durable execution for long-running agent workflows.
Temporal's durable execution engine is widely adopted to make agent pipelines reliable: state survives crashes, retries are automatic, and workflows run for minutes or months. A key piece of serious harness infrastructure.
$430M total · $300M Series D (Feb 2026) at $5B valuation
Sources
Verified Oct 29, 2026