Nessie YC Application

Fall 2025Active

Nessie went through Y Combinator in the Fall 2025 batch as a Consumer company. Below: what the company does, who founded it, and its application to YC, reconstructed question by question in the real YC form.

YC batch: Fall 2025
Industry: Consumer
Team size: 2
Status: Active
Launched: 2025

Founders

Anna ZhangCo-Founder & CEO
Tiger WangCo-Founder & CTO

What Nessie does

Knowledge work is being restructured by AI. Strategy happens in Claude. Research happens in ChatGPT. Building happens in Claude Code. The people defining the next decade of work are already thinking with AI every day. But none of that thinking compounds. Every session starts from zero. The reasoning behind decisions, the context behind strategies, the evolution of ideas across hundreds of conversations - all of it evaporates. Nessie is the infrastructure that makes it permanent. We auto-sync AI conversations across every major provider - ChatGPT, Claude, Gemini, Perplexity, Claude Code, OpenClaw, Codex, and more - and structure them into queryable, trustworthy context available to both humans and agents. No browser extension. No manual capture. Your thinking flows in automatically and compounds over time. Today, Nessie is the memory layer that makes every AI interaction smarter - grounded in your actual reasoning, not the median. Your agents start with your accumulated thinking instead of a blank slate. Your decisions have provenance, traceable back to the conversation where the thinking happened. Where we are going: the AI-native organization of the near future is a small team running thousands of agents. Those agents are powerful but amnesiac - they make decisions, form hypotheses, discover patterns, and forget everything between sessions. The organization's collective intelligence exists nowhere. There is no layer that integrates what the organization knows, what it has decided, and how its thinking has evolved. Nessie is that layer. Not another workspace. Not another wiki. The connective tissue that makes AI-native organizations possible. Science has journals. Law has case law. Software has git. AI-native knowledge work has nothing. We are building the infrastructure for cumulative thinking in the AI era. We are two Yale CS grads and former Amazon engineers. Backed by BoxGroup, Pioneer Fund, Y Combinator, Precursor, and more.

Nessie's YC application, reconstructed

Y Combinator application

Nessie, Fall 2025 batch. The real form questions, answered from public data.

Founders2
Company7
Progress7
Idea4
Equity3
Curious2
Batch Preference1

Company

Company name

Nessie

Describe what your company does in 50 characters or less.

A shared context layer for you, your team, and your agents.

What is your company going to make? Please describe your product and what it does or will do.

We built a memory layer that automatically syncs AI conversations from ChatGPT, Claude, Gemini, and other major providers into structured context that's queryable by people and AI agents. This preserves the evolution of ideas and reasoning across hundreds of conversations so your decisions have provenance and your agents don't have to start from zero every time.

Where do you live now, and where would the company be based after YC?

We live in San Francisco, CA, and the company will remain based here after YC.

Explain your decision regarding location.

San Francisco lets us be close to the AI and startup ecosystem, potential partners, and early users who are AI-native knowledge workers.

21 more answers in the full application

Founders, Progress, Idea, Equity, Curious, Batch Preference are in the full version. Create a free account to open it in YC Insights, next to every other YC batch.

See full application

Frequently Asked Questions

Is this the real Nessie YC application?

No. Y Combinator keeps submitted applications private. This is a reconstruction: the real YC form questions, answered from Nessie's public data (launch notes, founder backgrounds, product description). It shows how a company like Nessie would present itself to YC, not the text they submitted.