Nessie: Product, team and how it was built
Nessie (A searchable memory of a person's AI chats and agent sessions, United States): Three paid plans on sale, November 2026. Evidence grade E: no revenue figure was checked. Team: 2 co-founders; team size 2 on Y Combinator's company page, November 2026. Launched 6 November 2025; still running.Added
- Outcome
- Three paid plans on sale, November 2026
- Evidence
- E no revenue figure was checked
- Launch
- 6 November 2025
- Status
- Still running
- Team
- 2 co-founders; team size 2 on Y Combinator's company page, November 2026
- Outside funding
- Y Combinator Fall 2025 batch and other named backers; no amount stated in the sources read
- Main channel
- Not stated
What is not verified
No revenue figure was found, so the story is grade E. The home page, pricing, about, docs, privacy, terms, blog, changelog and Y Combinator pages were read. No source states that a customer has paid. A reader could look for a payment-processor profile, a press interview or a named customer. The oldest dated page is from 15 July 2025, and the same company name was used for all three products. This story is grade E: the business is real and its product, price and customers are described from public pages, but no revenue figure was checked. Aiolum shows it as an idea worth studying, not as proof that it makes money.
Nessie is a memory layer for AI work that keeps the history of a person's chats and lets people and agents search it. An agent is an AI program that works through tasks, such as Claude Code or Cursor. Agents reach the library through a command-line tool or an MCP connector, a standard way for an AI program to call outside tools. The company's pages list 28 sources, including ChatGPT, Claude, Gemini, Codex and Obsidian.
Anna Zhang and Tiger Wang are the founders; Y Combinator lists the team size as 2. The oldest dated copy of the company's site is from 15 July 2025, and the Y Combinator launch post is dated 6 November 2025. The pricing page lists Plus at US$28, Pro at US$79 and Team at US$80 per seat. Each is a monthly price billed yearly, with a 7-day free trial.
No revenue figure, user count for the current product or named paying customer was found, so the story is grade E. A price list, an in-app plan chooser and billing entries in the changelog show that paid plans can be bought without a sales call. No source states that a customer has paid.

Why did Nessie work?
Four causes, in the order they mattered. Each one is a reusable lesson.
The first version came from a founder's own lost Gemini thread
The about page says Anna Zhang used one Gemini conversation as her main thinking space until it hit the one-million-token limit. Months of research became unreachable. The founders built the first product for themselves, and the blog says they used it every day.
The team rebuilt the product three times in six months
Anna Zhang wrote on 19 April 2026 that a chat app became a memory layer, and then something else. She says users did not know what to do with an organized archive. The company then moved from filing chats to producing shareable contexts and, by November 2026, to serving agents.
It reads chats through the user's own sign-in, not an extension
The earlier version needed a Chrome extension for single chats. Anna Zhang wrote that it was clunky, “because the DOM on ChatGPT and Claude broke constantly”. The current docs say the user signs in once and Nessie syncs every 15 minutes. The user's login stays on the Mac.
How it was built
These details come from the company's docs, privacy policy and changelog. They are grade C. [8, 13, 1, 9]
- The app runs on the user's Mac first. The home page says the library starts on the user's machine, and Cloud Sync is opt-in.
- For ChatGPT, Claude, Gemini and Perplexity, the privacy policy says Nessie opens the provider's login page in a web view. It says session tokens stay on the Mac.
- Agents read the library through a CLI, an MCP server and agent skills that expose the same commands and permissions, according to the home page.
- The privacy policy says summaries and search indexes are made by sending conversation content to the company's server and on to third-party AI providers. It names none of them.
- The privacy policy says the public marketing pages use ad-measurement tools such as the Meta Pixel.
Tools named in the sources
Each one opens its page in the Tools tab, with every story that uses it.
Who tried this before Nessie, and why did they fail?
Two companies in our database of failed startups built tools to collect and share knowledge. The values below are from that database, were read on 12 November 2026 and are not independently verified.
Springpad
The promiseA web tool to collect, organize and find articles, videos and recipes, positioned as a competitor to Evernote.
Why it diedThe record says it could not turn its technology into a business. It names the lack of a monetization strategy beyond free use as the main failure.
Memo
The promiseA tool for engineering, product and design teams to create, share and archive rich media memos.
Why it diedThe record says it could not compete with entrenched tools that quickly added similar features, and that it needed whole teams to adopt it.
The failed startups come from our database of 1,749 dead startups, retold here in our own words. Its entries are AI-assisted summaries of public sources, so these cards carry no evidence grade.
What changed
Both records tried to be the place where people keep what they know. The Springpad record names the lack of a way to charge, and the Memo record names competition from established tools. Nessie's founders describe a related problem themselves: an organized archive did not tell users what to do next. The company answered by selling access to the archive for AI agents and for teams.
One thing is different from the records. The content now lives in tools owned by OpenAI, Anthropic, Google and others, and those companies have their own memory features. The sources do not show how many people pay for a layer above them.
Can one person copy Nessie now?
The pattern can be copied; the result is not shown.
Two founders can build for a problem they have, and keep changing the product until the use is clear. The sources show a price list and billing features, and no customer or revenue. Treat this as a pattern, not as proof that it earns.
Where it is still open: Other places where AI work piles up with no memory: meeting notes, support tickets, design reviews and research notebooks.
- 1Use your own product daily, and note where it stops being useful.
- 2Change the product when users do not know what to do with the result.
- 3Offer the data to agents through a CLI and an MCP connector, with the same permissions as the user.
- 4Publish a price list early, with a trial, and let users choose a plan in the app.
How much revenue does Nessie make?
Each row shows the evidence grade and the source numbers from the list at the end of this page. The grades are explained in How Aiolum verifies.
| Fact | Value | Grade | How we know | Sources |
|---|---|---|---|---|
| Company and founders | Nessie Labs, Inc.; Anna Zhang, co-founder and CEO; Tiger Wang, co-founder and CTO | C | The company's about page names both as co-founders, and its footer reads Nessie Labs, Inc. Y Combinator's page lists the same two as active founders. | [5, 3] |
| Start of the company | 2025; first dated copy of the site 15 July 2025 | C | An archive copy of nessielabs.com from 15 July 2025 carries the title Nessie Labs - Unified AI Memory. Y Combinator's page says Founded: 2025, batch Fall 2025. The archive had no earlier copy. | [18, 3] |
| Earlier products of the same company | Infinite Chat, then an auto-organizer (1 November 2025), then the context layer (12 April 2026) | C | Anna Zhang's blog post of 19 April 2026 says the company rebuilt Nessie from scratch three times in six months. The name Nessie stayed the same. | [6, 7] |
| Team | 2 people; 3 open jobs | C | Y Combinator's company page says Team Size: 2 and lists three open jobs, read on 12 November 2026. The about page names only the two founders. | [3, 5] |
| Funding | Y Combinator Fall 2025 batch; BoxGroup, Pioneer Fund, Precursor and others named; no amount | C | The company's Y Combinator page says Backed by BoxGroup, Pioneer Fund, Y Combinator, Precursor, and more. The about page adds a few angels. No source read gives an amount. | [3, 5] |
| What is sold today | Sync and search of AI conversations and agent sessions, with CLI and MCP access, sharing and team features | C | The home page and docs describe 28 sources, from ChatGPT and Claude to Cursor, Obsidian and Gmail. The Mac app is the main download. A Windows version was announced on 11 June 2026. | [1, 8, 7] |
| Prices today | Plus US$28, Pro US$79, Team US$80 per seat, each a monthly price billed yearly | C | The company's pricing page, read on 12 November 2026. It states a 7-day free trial and an on-prem plan with custom terms. | [2] |
| Paid plans on sale since | at least 9 August 2026 | C | An archive copy of the pricing page from 9 August 2026 shows the same three prices and the trial. The changelog of 8 May 2026 lists a redesigned pricing and billing experience. | [16, 7] |
| How a plan is bought | In the Nessie app after download; trial users can start a paid plan at any time | C | The pricing page says plans are selected in the app. The changelog of 16 June 2026 says trial users can start a paid plan without waiting. The terms say prices are disclosed before purchase. No payment processor is named. | [2, 7, 14] |
| How chats from other AI services come in | The user signs in to the other service in a web view; session tokens stay on the user's Mac | C | The privacy policy and the ChatGPT, Claude and Gemini docs describe this. New and updated conversations sync every 15 minutes. The pages do not mention those services' own terms. | [13, 9, 10, 11] |
| Sign-ups of the earlier auto-organizer | about 1,900 users and more than 300,000 conversations imported in one week | C | Anna Zhang's blog post of 19 April 2026 states this for a launch in November. The post does not say how many of these users stayed. No figure for the current product was found. | [6] |
| Paying customers | No source states that any customer has paid | C | The home page, pricing, docs, blog, changelog and Y Combinator pages were read. They show a price list and billing features, and no customer, revenue or paid-user number. | [1, 2, 7, 3] |
How to read this table. Grade C means the company states the value, or a dated archive copy of its own page shows it. No value is grade A or B, and no calc value is used.
| Plan | Per month, billed yearly (US$) | Per month, billed monthly (US$) | Limit |
|---|---|---|---|
| Plus | 28 | up to 5 connected accounts, unlimited sync, MCP access, CLI, usage limits on context generation and chat | |
| Pro | 79 | unlimited connected accounts, context generation and chat | |
| Team | 80 per seat | team sharing, owner-managed billing, admin dashboard, shared skill layer, Ontology | |
| On-prem | custom | self-hosted deployment; the button reads Talk to us |
The page shows each price as a monthly amount billed yearly, and a Yearly switch that the page says saves 20%. The monthly price loads by script and could not be read. All plans start with a 7-day free trial. On-prem is a custom deployment with a Talk to us button.
When did Nessie launch, and how did it grow?
From a memory tool for AI chats in July 2025 to a context layer for agents and teams with a price list in November 2026.
- 15 July 2025CThe oldest archive copy of nessielabs.com is titled Nessie Labs - Unified AI Memory. [18]
- 1 November 2025CVersion 1.3 adds auto-organization into topics, search, a Chrome extension for single chats and an import flow for exported data files. [7]
- 6 November 2025CY Combinator launch post Nessie: Perplexity for Your Mind, by Anna and Tiger. An archive copy of the site from 7 November is titled AI Knowledge Base for Your Mind. [4, 17]
- 12 April 2026CVersion 1.4 adds context generation, chat across all history and sync with ChatGPT, Claude, Claude Code, Gemini, Perplexity and OpenClaw, with no Chrome extension. [7]
- 8 May to 16 June 2026CThe changelog lists a redesigned pricing and billing experience, per-seat team billing, a Windows app and paid-plan upgrades for trial users. [7]
- 11 November 2026CThe latest changelog entry adds a Pocket integration and embeds of YouTube videos and X posts in contexts. [7]
What could go wrong for Nessie?
The risks are the mirror image of the causes above.
What is not verified
No revenue figure was found, so the story is grade E. The home page, pricing, about, docs, privacy, terms, blog, changelog and Y Combinator pages were read. No source states that a customer has paid. A reader could look for a payment-processor profile, a press interview or a named customer. The oldest dated page is from 15 July 2025, and the same company name was used for all three products.
Sync uses the user's sign-in on other AI services
The privacy policy says Nessie opens each provider's official login page in a web view and keeps session tokens on the Mac. The pages read do not say what OpenAI, Anthropic, Google or Perplexity allow for such syncing, and this story did not read those terms. The pages mention no bot-check bypass. The changelog of 14 April 2026 lists more reliable integration “when providers rate-limit syncing”.
Home-page logos are not sourced
The home page shows a Backed by Y Combinator badge, which Y Combinator's page confirms. Under Used by people and teams at, it shows four logos: Alpha School, Basic Capital, OMNIA Partners and TD Ameritrade. No page read says who at these organizations uses the product or whether they pay. The terms require users to be at least 18, and no page read addresses pupils.
The team may be larger than two
Y Combinator lists a team size of 2 and three open jobs, a founding engineer, a forward deployed engineer and an intern. The home page names no other staff. The directory value is undated, and the company does not publish a headcount.
Sources
The grade next to each source is the best grade that the source can support. "Read in full" means that the text of the page was downloaded and the numbers were checked in it.
- C Nessie home page: The context layer for AI-native teamsRead in full on 12 November 2026. Source for the product description, the source list, the FAQ, the logos and the badge.
- C Nessie pricing pageRead in full on 12 November 2026. Source for the plans, the prices, the trial and the statement that plans are chosen in the app.
- C Y Combinator company page: NessieRead in full on 12 November 2026. Source for the founders, the batch, the year founded, the team size, the open jobs and the backers.
- C Y Combinator launch page: Nessie: Perplexity for Your MindRead in full on 12 November 2026 as the page's data file. The company's own post, created on 6 November 2025, with 34 votes.
- C Nessie about pageRead in full on 12 November 2026. Source for the founders' roles and the origin of the product.
- C Nessie blog: Why We Killed Our Product TwiceRead in full on 12 November 2026. Written by Anna Y. Zhang and dated 19 April 2026. Source for the earlier products and the sign-up figures.
- C Nessie changelogRead in full on 12 November 2026. Source for the release dates, the billing entries and the sync changes.
- C Nessie docs: How integrations workRead in full on 12 November 2026. Source for the list of sources and the statement on where credentials stay.
- C Nessie docs: ChatGPT integrationRead in full on 12 November 2026. Source for the sign-in step and the 15-minute sync.
- C Nessie docs: Claude integrationRead in full on 12 November 2026. Source for the sign-in step and the 15-minute sync.
- C Nessie docs: Gemini integrationRead in full on 12 November 2026. Source for the sign-in step and the 15-minute sync.
- C Nessie docs: Sync not workingRead in full on 12 November 2026. Source for the expired-session cause of failed web-based syncs.
- C Nessie privacy policyRead in full on 12 November 2026. Effective 3 September 2026. Source for how provider sync works and for the ad-measurement tools.
- C Nessie terms of serviceRead in full on 12 November 2026. Effective 30 September 2026. Source for the age limit and the payment terms.
- C Nessie blog indexRead in full on 12 November 2026. Five posts from 19 April to 20 October 2026; none is marketed to children or students.
- C Internet Archive copy of the Nessie pricing page, 9 August 2026Read in full on 12 November 2026. Source for the three prices and the trial on that date.
- C Internet Archive copy of the Nessie home page, 7 November 2025Read the page title only on 12 November 2026; the page loads its content by script. Title: Nessie - AI Knowledge Base for Your Mind.
- C Internet Archive copy of the Nessie home page, 15 July 2025Read the page title only on 12 November 2026. Title: Nessie Labs - Unified AI Memory. The oldest copy the archive offered.
- C Database of failed startups, local exportRecord pages read on the website on 12 November 2026. AI-written summaries, not independently verified.
Run this company? Send corrections or a verified figure to aiolum@livyden.com