Overlay is an all-in-one personal AI with memory. It captures what you read, write, ask, save, and decide and makes it available to every model you talk to — Claude, Gemini, or GPT-4.

How is Overlay different from ChatGPT or Claude?

ChatGPT and Claude start each conversation from zero. Overlay starts from you: every webpage, file, note, and previous conversation lives in your Brain and is retrieved automatically when relevant. You can also switch models mid-thread without losing context.

Which AI models does Overlay support?

Overlay supports Anthropic Claude (Haiku 4.5, Sonnet 4.5, Opus 4.7), Google Gemini (3 Flash, 3 Pro), and OpenAI GPT-4. Pick the right model for each task without losing your Brain context.

Yes. Raw vendor blobs and full model prompts aren't stored by default — only previews, hashes, and structured output. You can delete any artifact and its chunks, embeddings, claims, links, and traces will go with it.

What is an artifact in Overlay?

An artifact is any durable piece of memory: a webpage, note, file, PDF, image, code snippet, Claude artifact, task, calendar event, conversation, or synthesis note. Overlay processes every artifact into chunks, embeddings, entities, claims, questions, and graph links so they can be retrieved later.

When will the iOS app, CLI, and MCP server be available?

The web app and browser extension are live today. The public API is in beta. The MCP server, CLI, and iOS app are coming soon — sign up to be notified when each ships.

How much does Overlay cost?

All Brain features are free during the public beta — no credit card required. Paid Pro and Unlimited tiers will launch after the beta with extra model access, higher limits, and team features.

新版本 Brain v1

Brain v1 · free while in beta

All-in-one personal AI

Overlay remembers what you read, write, ask, save, and decide — and brings it back into every chat. One brain. Any model. Yours.

Claude Sonnet 4.5Claude Opus 4.7Gemini 3 ProGemini 3 FlashGPT-4

Open the Brain Add to Chrome How it works

Everything is an artifact

One memory model. Every kind of content.

Webpages, conversations, files, Claude artifacts, tasks, events — all captured in a single artifact model so any one can reference, link, or be retrieved alongside any other.

WebpageConversationNotePDFFileImageCodeClaude artifactTaskCalendar eventSynthesis

Browse with memory

The extension watches the pages you choose to keep — clip, save, and chat with them later. The Brain remembers what you've seen.

See how

Any model, one memory

Claude, Gemini, or GPT-4 — switch freely. Your Brain travels with you across every provider.

See how

Capture files & PDFs

Drop a PDF, image, or document. Overlay chunks, embeds, and links it into your Brain so future chats can find it.

See how

Save Claude artifacts

Code, SVGs, markdown — pull artifacts straight out of Claude into your Brain, ready to be referenced from any conversation.

See how

Inspectable retrieval

Every answer comes with a trace chip. See exactly which memories were retrieved, scored, and injected — or correct them.

See how

Private by default

Raw prompts and vendor blobs aren't stored unless you opt in. Delete any artifact and its chunks, embeddings, and traces go with it.

See how

How the Brain works

Five layers, one memory. Raw artifacts flow up the stack into chunks, abstractions, a graph, and synthesis — then back down into every chat.

1 · Capture

2 · Process

3 · Recall

Webpage

Chat

PDF

Artifact

Task

Event

Your Brain

chunks · entities · claims · graph

Claude

Gemini

GPT

Inside the Brain

Layer 1

Raw artifact

URL, body, file, metadata captured as-is.

Layer 2

Chunks + embeddings

Split + vectorized so any chat can find it.

Layer 3

Abstractions

Entities, claims, questions extracted.

Layer 4

Graph

Links by topic, URL, references, derived-from.

Layer 5

Synthesis

Themes, recurring questions, contradictions.

On every answer

retrieval-tracelive

retrieving memory…

Step 1

Capture

Clip a page, drop a file, save a Claude artifact, or just chat. Anything meaningful becomes an artifact in your Brain.

Step 2

Process

Overlay chunks, embeds, extracts entities, claims, and questions, then connects them into a personal knowledge graph.

Step 3

Recall

Next time you chat — with any model — the Brain retrieves the right memories, shows the trace, and lets you correct what's wrong.

Multi-model

One brain, every frontier model

Overlay routes through Anthropic Claude, Google Gemini, and OpenAI GPT — pick the right one for each task. The Brain, your context, and your memory stay the same.

Switch models mid-thread without losing context

One memory shared across every provider

Use the best model for each task — Sonnet for code, Gemini for long context, GPT for reasoning

Inspectable & private

An AI you can audit

Every retrieved memory is logged with a trace. Vendor blobs and raw prompts aren't kept by default. You can correct, archive, or forget any artifact.

Trace every answer

Click the trace chip on any assistant reply to see exactly which artifacts, chunks, and claims were injected.

Correct & dismiss

Claims aren't facts. Mark them as wrong, supersede them, or pin the ones that matter — your Brain learns what you trust.

Forget anything

Delete an artifact and its chunks, embeddings, claims, links, and traces go with it. Privacy defaults are conservative on purpose.

Use it anywhere

Web today. Everywhere next.

Start with the web app and Chrome extension. CLI, public API, MCP server, and iOS capture are on the way.

Live now

Web app

Open the Brain workspace, ingest URLs and files, inspect every trace.

Open

Live now

Browser extension

Clip pages, drop into chat, save Claude artifacts — straight from your browser.

Open

Beta · Q3

Public API

Push artifacts and query memory with API keys. Stable /api/v1 with key prefixes.

Join the beta to get early access.

COMING SOON

Coming soon

MCP server· Soon

Expose your Brain to Claude Desktop, Cursor, and any MCP-aware tool.

Notify me when it ships

COMING SOON

Coming soon

CLI· Soon

overlay ingest, overlay search, overlay trace — your Brain from the terminal.

Notify me when it ships

COMING SOON

Coming soon

iOS app· Soon

Capture from share sheet, ask your Brain on the go, sync everywhere.

Notify me when it ships

Why now

The personal AI moment is finally here

Builders and researchers have been calling for it for years: an AI that's actually yours, with your context, your memory, your taste. Overlay is one shape of that idea.

Personal LLMsInspired by

"The long-running thread of Software 2.0 and personal LLMs: a future where you talk to your own model, with your own context, instead of a generic one."

Andrej Karpathy

Tesla AI, OpenAI · @karpathy

Tools for thoughtInspired by

"Tools for thought and the "second brain" workflow keep coming back because the problem is real — your knowledge is scattered across 12 apps that don't talk."

Garry Tan

President & CEO, Y Combinator

Second BrainInspired by

"Capture, organize, distill, express. The discipline that millions of knowledge workers already practice — Overlay automates the boring half."

Building a Second Brain

Tiago Forte · the BASB movement

PKG / GraphInspired by

"Note-taking apps figured out the graph. LLMs figured out language. Overlay is what happens when you put them in the same memory."

Personal Knowledge Graphs

GBrain · TheBrain · Roam · Obsidian community

These are public ideas from the personal-AI conversation, not endorsements. We're building one answer to the same question they've been asking.

简单透明的价格体系

选择最适合您的方案。所有方案均包含14天免费试用。

免费版

$0/月

个人使用的基本功能

基础笔记功能（最多50条）
上下文感知的浏览辅助
访问2种LLM模型（GPT-3.5、Claude Free）
随时导出您的数据
Google日历集成
Google任务集成
无限历史记录
图片拖放功能
基础PDF支持
高级模型访问（GPT-4.5、Claude Sonnet 3.7等）
优先支持

Overlay Pro

$3/月

常见问题

我可以在方案之间切换吗？

是的，您可以随时升级或降级您的方案。更改将在下一个计费周期生效。

有免费试用吗？

所有付费方案均包含14天免费试用，无需信用卡即可开始。

接受哪些付款方式？

我们接受所有主要信用卡和PayPal。企业客户可以通过发票付款。

我可以使用自己的API密钥吗？

Yes, Overlay Pro lets you use your own API keys for various LLM providers to control your usage and costs.

What our users say

Researchers, developers, and writers using Overlay as their second brain.

"Finally an AI that doesn't make me re-explain my project every morning. The Brain remembers the docs I clipped, the decisions I made, and the dead-ends I already hit."

Sarah Johnson

PM, infra startup

"I bounce between Claude and Gemini all day. Overlay is the only place my context lives in one shape — everything else feels like starting over."

Michael Chen

Software engineer

"The retrieval trace is the part that sold me. I can see exactly which note, page, or claim it pulled — and tell it when it's wrong."

Emma Rodriguez

Researcher

"Finally an AI that doesn't make me re-explain my project every morning. The Brain remembers the docs I clipped, the decisions I made, and the dead-ends I already hit."

Sarah Johnson

PM, infra startup

"I bounce between Claude and Gemini all day. Overlay is the only place my context lives in one shape — everything else feels like starting over."

Michael Chen

Software engineer

"The retrieval trace is the part that sold me. I can see exactly which note, page, or claim it pulled — and tell it when it's wrong."

Emma Rodriguez

Researcher

"Finally an AI that doesn't make me re-explain my project every morning. The Brain remembers the docs I clipped, the decisions I made, and the dead-ends I already hit."

Sarah Johnson

PM, infra startup

"I bounce between Claude and Gemini all day. Overlay is the only place my context lives in one shape — everything else feels like starting over."

Michael Chen

Software engineer

"The retrieval trace is the part that sold me. I can see exactly which note, page, or claim it pulled — and tell it when it's wrong."

Emma Rodriguez

Researcher

"Finally an AI that doesn't make me re-explain my project every morning. The Brain remembers the docs I clipped, the decisions I made, and the dead-ends I already hit."

Sarah Johnson

PM, infra startup

"I bounce between Claude and Gemini all day. Overlay is the only place my context lives in one shape — everything else feels like starting over."

Michael Chen

Software engineer

"The retrieval trace is the part that sold me. I can see exactly which note, page, or claim it pulled — and tell it when it's wrong."

Emma Rodriguez

Researcher

Ready to give your AI a memory?

Start your Brain today

Open the web app to capture your first artifacts, or install the extension to clip from anywhere. Free during the beta.

Start here

Open the Brain

Open Overlay

Add the extension

Clip pages, drop into chat, and save Claude artifacts straight to your Brain.

Add to Chrome Add to Edge

Join the early users building a personal AI that actually remembers them.