Is this the same as 1-800-ChatGPT on WhatsApp?

No. 1-800-ChatGPT was OpenAI's own contact that you messaged inside WhatsApp. OpenAI said it would stop working on WhatsApp after January 15, 2026, and its help page now says it is available again only in the European Economic Area. WhatSync works the other way round: it brings your WhatsApp chats into ChatGPT, so you can ask about them where you already use ChatGPT.

Is WhatSync made by OpenAI or WhatsApp?

No. WhatSync is made by Appstronauts. It is an app you add to ChatGPT. It is not made by, affiliated with, or endorsed by OpenAI, WhatsApp, or Meta.

Can ChatGPT read all my WhatsApp chats?

ChatGPT can only see what WhatSync shows, and you choose that. On paid plans every group is shown by default; untick any group to hide it. You can also hide one-on-one chats with certain people. Hidden chats are kept, not deleted, and come back if you show them again. See what WhatSync saves.

Does my WhatsApp keep working as normal?

Yes. WhatSync links as one of your devices, and your phone works as before.

Can ChatGPT send WhatsApp messages for me?

ChatGPT can write a message and send it after you confirm. Check who it goes to and what it says before you approve. You are responsible for the messages you approve.

Does it work with the WhatsApp Business app?

Yes. Linking works with the normal WhatsApp app and the WhatsApp Business app.

Will ChatGPT see my old messages?

Yes. When you link, WhatSync brings in your older chats. The free trial, Plus and Pro show your newest 1,000 older messages (500 from one-on-one chats, 500 from groups). Max shows everything your phone sends, as far back as it goes. Linking does not delete anything on your phone.

Can ChatGPT see photos and voice notes?

Yes, on Pro and up. New voice notes are turned into text, in any language, and photos and scanned documents are read, so ChatGPT can search and quote them. There is nothing to switch on. On Plus, ChatGPT reads the text in typed PDFs and sees that a photo or voice note was sent, with its file name or caption.

Click Disconnect in your WhatSync dashboard, or open WhatsApp on your phone, go to Linked devices, and log out of WhatSync. You can also remove the WhatSync app from your apps in ChatGPT's settings.

Can I use this with Claude too?

Yes. The same WhatSync account works in Claude, Codex and other AI apps. See the Claude guide.

How much does it cost?

See the pricing page for the current plans.

Connect WhatsApp to ChatGPT

Add the WhatSync app to ChatGPT, link your WhatsApp, and ask ChatGPT about your chats. It takes about 5 minutes and your WhatsApp keeps working as normal.

Add to ChatGPT Link your WhatsApp

Looking for OpenAI's 1-800-ChatGPT contact on WhatsApp? That is a different thing, and it now works only in the European Economic Area. See the first question below. This guide brings your own WhatsApp chats into ChatGPT.

Watch the setup

The whole setup in 4 minutes, from adding WhatSync in ChatGPT to asking about your chats. The steps below are the same, written out.

What you can do

Once it is connected, you talk to ChatGPT about your WhatsApp the same way you talk to it about anything else.

See who is waiting on you
“Who messaged me on WhatsApp today and is still waiting for a reply?”
Catch up on a busy group
“Summarise what the family group talked about this week.”
Find an old message
“Find the message where Rahul sent his address.”
Write a reply
“Draft a polite reply to the last message from the supplier.”

Step 1: Add WhatSync to ChatGPT

WhatSync is an app in ChatGPT. You add it once and it stays connected.

Click Add to ChatGPT below. The WhatSync app opens in ChatGPT. Click to connect it.
Sign in to WhatSync with Google or your email. New to WhatSync? Signing in creates your account.
You come back to ChatGPT and it says the app is installed. Click Try now.

ChatGPT showing the WhatSync app as installed, with a Try now button and example prompts. — After you sign in, ChatGPT shows the app as installed.

In these screenshots the app is called WhatSync Construction. It is the same app, and it is moving over to the WhatSync name.

Add to ChatGPT

Or add WhatSync by URL

If the WhatSync app does not show up for you, or your workspace only allows approved servers, add it as a custom MCP server on ChatGPT on the web. Your plan or workspace has to allow custom MCP servers.

https://whatsync.app/api/mcp

Open ChatGPT Plugins, select the plus button, then Add custom MCP server.
Name it WhatSync and paste the server URL above.
Choose OAuth and sign in to WhatSync with Google or your email.
Review ChatGPT's notice, select Create as a plugin, then install it.
In a chat, type @ and pick WhatSync, then ask about your WhatsApp. Then carry on with step 2 below.

No Add custom MCP server option? Your plan or workspace does not allow custom servers yet. Use the WhatSync app above instead. OpenAI's steps are in its custom MCP server guide.

Step 2: Link your WhatsApp

ChatGPT is now connected to your WhatSync account, but your WhatsApp is not linked yet. Ask ChatGPT anything about your WhatsApp and it gives you a link that signs you straight into your dashboard. The link works for 15 minutes.

ChatGPT saying the account is connected but no WhatsApp is linked yet, with a Link WhatsApp to WhatSync link. — ChatGPT gives you a link to finish the setup.

Linking uses WhatsApp's Linked devices. Nothing to install and no password to share. In the dashboard, click Show QR code, then:

On your phone, open WhatsApp. On iPhone go to Settings. On Android tap the three dots at the top.
Tap Linked devices, then Link a device.
Point your phone at the QR code on your screen.

The Link your WhatsApp panel in the WhatSync dashboard, with the steps, a Show QR code button and Link with phone number instead. — The dashboard shows the same steps next to the QR code.

The dashboard saying WhatsApp connected, with the phone number covered. — Once it says Connected, you are done. Messages start showing up within a minute or two.

Only have your phone? Click Link with phone number instead and enter your number. WhatSync shows you a code. In WhatsApp, go to Linked devices, Link a device, tap Link with phone number instead, and type in the code.

Link your WhatsApp

Step 3: Choose what ChatGPT can see

WhatSync keeps everything your phone sends. You decide what ChatGPT can see.

Open Settings in your dashboard and find What's saved.
For one-on-one chats, pick Everyone except to hide certain people from ChatGPT, or Only these people to show only the people you add. Hidden chats are kept, not deleted.
On a paid plan every group is shown by default. Untick any group you want hidden from ChatGPT.
Under Your saved chats, remove any chat you want gone from WhatSync. Your WhatsApp does not change.

The one-on-one chats settings with Everyone except and Only these people, and the Your saved chats list below. — Chat settings and your saved chats, in the dashboard.

Step 4: Send yourself a test message

Your older chats come in within a few minutes of linking. To check that new messages are saving too, send yourself a message on WhatsApp. When Messages saved in your dashboard goes up, it is working.

The dashboard counter showing Messages saved: 1. — The test message, saved.

Need to look through older chats? Export one from WhatsApp and open it in our free chat export viewer.

Step 5: Ask ChatGPT

Go back to ChatGPT and ask about your WhatsApp. In the same chat as before, “Can you try again?” is enough. In a new chat, ask the full question. If ChatGPT does not use WhatSync on its own, mention it by name, for example “Use WhatSync to…”.

ChatGPT showing the test message from WhatsApp and the time it was sent. — ChatGPT finds the test message.

“Use WhatSync to show me the chats I haven't replied to.”

“What did the landlord say about the rent this month?”

“List every chat where someone asked about the price.”

Sending messages

ChatGPT can write a reply and send it from your WhatsApp. It asks you to confirm first, so check who it goes to and what it says before you approve.

A linked personal number is for your own chats, not for messaging many people at once. WhatsApp can restrict numbers that send bulk or unwanted messages. To message many customers, use the WhatsApp Business API.

If something goes wrong

ChatGPT says no WhatsApp is linked yet: WhatSync is connected to ChatGPT, but you have not linked WhatsApp yet. Click the link ChatGPT shows you, which signs you into your dashboard, and link WhatsApp there. The link works for 15 minutes. If it expired, ask ChatGPT again for a new one.
WhatsApp is connected but nothing is saved: Give it a minute or two while your older chats come in after linking. Check that the chat is not hidden in step 3, then send yourself a new message on WhatsApp.
The dashboard has the message but ChatGPT doesn't: Ask again in the same chat, or start a new chat and ask the full question. If ChatGPT does not use WhatSync on its own, mention it by name.
The QR code expired: QR codes only last a short time. Click Show QR code again and scan it straight away. You can also link with your phone number and a code instead.
It worked before and now it doesn't: Open WhatsApp on your phone, go to Linked devices, and check that WhatSync is still there. WhatsApp can log out linked devices if your phone has been offline for a long time. If it is gone, link it again from your dashboard. More in WhatsApp won't link or got logged out.

Questions

Is this the same as 1-800-ChatGPT on WhatsApp?: No. 1-800-ChatGPT was OpenAI's own contact that you messaged inside WhatsApp. OpenAI said it would stop working on WhatsApp after January 15, 2026, and its help page now says it is available again only in the European Economic Area. WhatSync works the other way round: it brings your WhatsApp chats into ChatGPT, so you can ask about them where you already use ChatGPT.
Is WhatSync made by OpenAI or WhatsApp?: No. WhatSync is made by Appstronauts. It is an app you add to ChatGPT. It is not made by, affiliated with, or endorsed by OpenAI, WhatsApp, or Meta.
Can ChatGPT read all my WhatsApp chats?: ChatGPT can only see what WhatSync shows, and you choose that. On paid plans every group is shown by default; untick any group to hide it. You can also hide one-on-one chats with certain people. Hidden chats are kept, not deleted, and come back if you show them again. See what WhatSync saves.
Does my WhatsApp keep working as normal?: Yes. WhatSync links as one of your devices, and your phone works as before.
Can ChatGPT send WhatsApp messages for me?: ChatGPT can write a message and send it after you confirm. Check who it goes to and what it says before you approve. You are responsible for the messages you approve.
Does it work with the WhatsApp Business app?: Yes. Linking works with the normal WhatsApp app and the WhatsApp Business app.
Will ChatGPT see my old messages?: Yes. When you link, WhatSync brings in your older chats. The free trial, Plus and Pro show your newest 1,000 older messages (500 from one-on-one chats, 500 from groups). Max shows everything your phone sends, as far back as it goes. Linking does not delete anything on your phone.
Can ChatGPT see photos and voice notes?: Yes, on Pro and up. New voice notes are turned into text, in any language, and photos and scanned documents are read, so ChatGPT can search and quote them. There is nothing to switch on. On Plus, ChatGPT reads the text in typed PDFs and sees that a photo or voice note was sent, with its file name or caption.
How do I disconnect?: Click Disconnect in your WhatSync dashboard, or open WhatsApp on your phone, go to Linked devices, and log out of WhatSync. You can also remove the WhatSync app from your apps in ChatGPT's settings.
Can I use this with Claude too?: Yes. The same WhatSync account works in Claude, Codex and other AI apps. See the Claude guide.
How much does it cost?: See the pricing page for the current plans.

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