Harper (YC W25) Tech Stack

AI-native commercial insurance brokerage for E&S underwriting

Insurance San Francisco, California 11–50 employees Founded 2024 Privately Held

Harper is a 2024-founded commercial E&S insurance brokerage built on an AI-native stack—Claude, ClickHouse, Python, TypeScript, plus real-time voice/video (Pipecat, LiveKit, WebRTC)—indicating deep automation across prospecting, quoting, binding, and post-sale service. The project list (outer-loop AI agents, ML models for underwriter load balancing, supervised fine-tuning pipelines) and pain-point focus (slow legacy distribution, human-led workflows) signal a company actively replacing manual insurance processes with agentic systems. Early-stage hiring velocity is decelerating, but engineering and sales headcount remain balanced for a pre-product-market-fit brokerage.

Tech Stack 18 technologies

Core StackClickHouse Cursor Google Ads Meta Ads Epic Systems Python TypeScript Claude Pipecat LiveKit SIP WebRTC Windsurf SQL LinkedIn X YouTube

AdoptingMCP

What Harper (YC W25) Is Building

◆Challenges

Slow distribution system
Human-led insurance
Opaque distribution process
Opaque processes
Automating legacy processes
Slow insurance distribution
Legacy workflows
Underinsured businesses
Human-led distribution
Scaling customer service

▲Active Projects

Outer loop ai agent development
Build sales infrastructure
Ai training data
Full funnel optimization
Ai training pipeline
Scalable cx platform
Build robust evaluation systems for supervised fine-tuning and reinforcement learning
Develop ml models for underwriter load balancing
Core ai infrastructure
Agent architecture

Hiring Activity

Decelerating25 roles · 7 in 30d

Department

Engineering

Sales

Marketing

Ops

Product

Seniority

Senior

Lead

Mid

Junior

Manager

Notable leadership hires: Operations Lead, Content Lead, Chief of Staff

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About Harper (YC W25)

Harper operates as a commercial insurance brokerage for Errors & Omissions (E&S) coverage, a high-touch segment traditionally dominated by human-led underwriting and opaque distribution workflows. The company's differentiation is a proprietary tech stack designed to automate the full lifecycle: lead prospecting, quote generation, policy binding, and customer service. Infrastructure includes vector databases (ClickHouse) for training data, agentic development frameworks (Cursor, Claude via MCP), and real-time communication layers for underwriter and customer interaction. The org is small and lean—11–50 employees across engineering, sales, marketing, ops, and product—operating out of San Francisco.

HeadquartersSan Francisco, California

Company Size11–50 employees

Founded2024

Hiring MarketsUnited States

Frequently Asked Questions

What is Harper's tech stack?

Claude, ClickHouse, Python, TypeScript, Pipecat, LiveKit, WebRTC, Epic Systems (EHR integration likely for data), plus developer tools Cursor and Windsurf. Adopting MCP for tool integration.

What is Harper working on?

Core projects include outer-loop AI agent development, ML models for underwriter load balancing, supervised fine-tuning pipelines, sales infrastructure, customer experience platform scaling, and full-funnel optimization for E&S distribution automation.