Invoices and payments, all in one place
From quotation to receipt, accept payments via QR and card, and deliver documents to customers by Email and Line — finish your paperwork in a few clicks.
No credit card required · Set up in 5 minutes
ชำระด้วย QR
สำเร็จ ฿1,500
ออกใบเสร็จอัตโนมัติ
RE-6807-00042
ครบทุกขั้นตอน — สร้างเอกสารต่อเนื่อง จ่ายเงินปุ๊บ ออกใบเสร็จปั๊บ
ใบเสนอราคา
ใบแจ้งหนี้
ลูกค้าโอนเงิน
ใบเสร็จอัตโนมัติ
Everything your business needs
A complete toolkit for documents and finance, in one system
Full document flow
Quotation, invoice, order receipt and receipt — all connected. Convert one into the next in a single click.
Automatic numbering
Standard running numbers that never duplicate or skip, and reset monthly on their own.
Online payments
Generate PromptPay QR or accept cards. Status updates and a receipt is issued the moment your customer pays.
Instant delivery
Send documents via Email and Line in a clean, readable format your customers can open on any device.
Taxes done right
Supports inclusive and exclusive VAT plus withholding tax, and calculates the net payable automatically.
Multiple businesses
Keep each business separate and secure. Manage multiple workspaces from a single account.
Connect your systems with a simple API
Running several businesses that take payments? Call one API to charge and issue receipts — every receipt shares one continuous running number, consolidating revenue across businesses into a single standard, ready for your accountant.
curl -X POST https://api.see-billing.com/api/v1/api/payments \
-H "Authorization: Bearer $TOKEN" \
-H "Content-Type: application/json" \
-d '{ "orderId": "A-1001", "amount": 1500, "method": "qr" }'
# → 200 OK
# {
# "paymentId": "pay_9fk2...",
# "qrCode": "data:image/png;base64, ...",
# "receiptNo": "RE-6807-00042"
# }Send to the accounting firm in one standard format
Easy to integrate
Standard OAuth2 + REST. Start taking payments in a few lines, with webhooks for automatic status updates.
Many businesses, one API
Every system and brand you run calls one central API — documents and revenue in one place.
Continuous numbering
Receipts share a single running sequence — never duplicated, never skipped, tax-compliant.
Made for accounting firms
One document format from every business — easier to review and faster to close the books.
Get started in 3 steps
Nothing to install — works right in your browser
Create an account
Sign up with your phone number, verify by OTP, and set up your business details.
Issue documents
Add a customer, pick line items, and the system calculates tax and assigns numbers automatically.
Get paid and send
Send to your customer with a payment option; once paid, the receipt is issued instantly.
What our users say
Thai businesses of every size use See-Billing to handle documents and get paid every day
“Receipts go out the moment a customer pays — no more doing it by hand. Saves me so much time.”
Nicha R.
Online shop owner
“Quotation to invoice in one click, and document numbers are never duplicated. Looks so professional.”
Pimchanok S.
Freelance designer
“Clients across many businesses send documents in one format — reviewing and closing books is much easier.”
Araya W.
Accounting firm
Sign up and get a first-time discount
Start using See-Billing in full at a special new-member price — applies to your first purchase
Start free & claim the discountPro
first month
฿199
฿299
save ฿100Pro
per year
฿1,990
฿2,990
save ฿1,000Business
first month
฿690
฿990
save ฿300A plan that fits
Start free, upgrade as you grow
Free
For getting started
฿0
- 10 documents/month
- Up to 5 customers
- All document types
- See-Billing watermark
Pro
For growing businesses
฿299/ month
- 50 documents/month
- Up to 20 customers
- Accept QR / card payments
- Tax reports
- No watermark
Business
For organizations and multiple businesses
฿990/ month
- Unlimited documents
- Unlimited customers
- Tax reports · no watermark
- Payment Gateway API (integrations)
- Recurring documents
Prices exclude VAT · Cancel anytime
Frequently asked questions
Can't find what you need? Reach us at the Help Center
Do I need accounting knowledge?+
No. The system is designed to be simple — it calculates tax and assigns document numbers for you. Just enter the line items.
Do the documents follow Thai formats?+
Yes. Documents include issuer details, tax ID, branch and full tax breakdown as commonly used in Thailand.
Which payment methods are supported?+
PromptPay QR and credit/debit cards via a standards-compliant payment provider. A receipt is issued automatically once paid.
Is my data safe?+
Each business’s data is isolated, and sensitive information is encrypted before storage.
Can I use it for multiple businesses?+
Yes. Manage multiple workspaces from one account, each with its own document numbers and data.
Is it hard to get started?+
Not at all. Sign up with your phone number and issue your first document within minutes.
Ready to make paperwork effortless?
Start using See-Billing for free today — no hidden fees
Create a free account