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Customers ask inside your app.You answer from your phone or Mac.

Your app, website, support email, Zalo, Messenger, Instagram, WhatsApp, TikTok and more, in one inbox. The AI answers and sells around the clock, your team gets the push, and the customer pays by VietQR without leaving the chat.

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Free forever plan · No card required · Apps for iPhone, Android and Mac

Already inside products people use every day

  • Học Đi
  • Cuppy
  • Saydi
  • NoteX
  • tatca.ai
  • Handkin

Every channel, one inbox.One list for the whole team.

Your app, website, support email, Zalo OA and personal Zalo, Messenger, Instagram, WhatsApp, Telegram, X, LINE, TikTok and TikTok Shop. Each customer is one conversation, and messages from your app arrive with the app version, screen and device.

Shared fairly, answered on time
Route by turn, by channel or by keyword. Office hours, away messages, and reply deadlines that push the assignee the moment one is missed.
Know who you are talking to
Signed-in customers arrive with their name, email and orders, next to every chat, email and rating they have sent you.
Your support email too
Forward [email protected] and every email becomes a conversation you answer from your own address.
Sending email as well? See Ha Tang Email

An AI that answers and sells,and knows when to hand over.

Give it your price list, policies and website. It answers in the customer's language the moment they write, recommends products and drafts the order. When a question needs a person, it hands over with a summary.

Answers only from your content
Your website, PDF and Word files, Google Docs and Sheets, Notion and FAQ. Each answer names its source, and when the answer isn't there it says so.
Hands over with a summary
Returns, complaints, a wholesale enquiry or a customer who asks for a person go to your team with what was asked and what is already done.
On your terms
Let it answer first, only after hours, or only suggest replies. Daily and monthly spending caps, and every answer is in the log.
How the hand-over works

Sell in the chat.Get paid by VietQR.

Send a product card, the customer taps Buy and the order is drafted in the conversation. Confirm it, send the VietQR code, and the chat says Paid the moment the money lands in your own account.

Speak first, at the right moment
A message or a lead form when someone is about to leave, has scrolled the price table or arrives from your ad.
Follow up the ones who went quiet
The AI rereads the chat and picks up where the customer stopped, up to three times, plus Zalo ZNS to customers who left their number.
Let buyers sell for you
“Someone in District 3 just bought…” notices from real orders, and each sale sent back to Google Analytics and Meta so your ads find more buyers.
Payments in the chat

Chatbot flows that run themselves,with no one on duty.

Greet visitors from an ad, ask what they need, collect the phone number, send the right products and route wholesale buyers to sales. Start from a ready-made Vietnamese template, change the words, switch it on.

Starts when it should
When a chat opens, on a keyword, on a page, from an ad link or outside office hours. On your app, website, Zalo OA, Messenger and Instagram.
Every step you need
Buttons, questions that check the phone number, product cards, tags, waits, and a hand-off to the AI or a person.
Workflows on events
Thank buyers when an order is paid and check in a few days later, remind unpaid orders, reassign a customer left waiting, flag a low rating at once.

Eight templates to start from: welcome and triage, collect a phone number, after hours, product advice, order status, booking, FAQ menu and feedback.

How chatbot flows work

Answer customers from anywhere.On Mac, iPhone, Android and the web.

Native apps with shortcuts, push on the lock screen, and the full dashboard in the browser. Step away from the desk and still never keep a customer waiting.

Your developers will like it too.Native SDKs, an open protocol.

Real iOS, Android, Flutter, React Native and web chat, all on one protocol and one inbox. One snippet does what matters most: tells the chat who the customer is and what they just bought.

All SDKs
checkout.js
// Signed in: the inbox knows who this is$hatang.push(["identify", {  userId: "u_42", name: "Nguyễn Thu Hà", hash,}]);// Just ordered: the order shows next to the conversation$hatang.push(["setData", { last_order: "DH000011", total: 185000 }]);

Sign-in and orders: the two calls that make the inbox useful.

Build or buy
—Ha TangBuild in-house
Time to first replyAn afternoon2–3 months
Native chat on web, iOS, Android, desktopIncludedOne team per platform
Push, history, uploads, reconnectsIncludedAPNs, FCM, a worker, edge cases forever
Inbox, support email, team apps, AI, reportsIncludedA second product
AI agent and chatbot flows trained on your documentsIncludedMonths of LLM and search work

  • Native, not a WebView

    Real iOS, Android and desktop UI: dark mode, font scaling, screen readers.

  • Your Firebase keys

    Push through your own Firebase or APNs project; identity secrets never leave your server.

  • Open protocol, tested

    Versioned WebSocket frames with a JSON Schema; every SDK passes the same conformance suite.

  • Accessible

    AA contrast, screen reader labels, 200% text without clipping. The Flutter SDK scores 160/160 on pub.dev and runs on WebAssembly.

Questions people ask

What teams ask before they start. Everything else is in the help center, or ask us directly.

Visit the help centerChat with us

  • Yes. The Free plan is 0đ forever and needs no card: every module, including support chat and the SDKs, for two team members. Pro is 690,000đ a month per business with unlimited members, 2,000 AI replies, support email, Zalo OA, Messenger, Instagram and TikTok Shop. Extra AI replies are 250đ each. Personal Zalo works on every plan.

Your customers are already in your app.Answer them there.

Free forever plan, no card. Set it up in an afternoon and answer your first customer today.

Start free

Free forever plan · No card required · Apps for iPhone, Android and Mac