E-invoice (Thai Son)
Vietnamese e-invoice platform from 20+ year IT vendor Thai Son, integrated with SAP, ERP, and Vietnam's tax authority systems
E-invoice by Thai Son is a Vietnam-only e-invoicing platform best suited to Vietnamese businesses and FDI enterprises needing mandatory e-invoice compliance integrated with SAP, ERP, or CRM systems, sold in prepaid VND invoice packages rather than a monthly subscription. It has no PromptPay, QRIS, or non-Vietnam SEA localization, so it is not a fit for businesses operating outside Vietnam.
Judged on regional fit, not vendor glossies.
Vietnam-only e-invoicing platform built around Vietnam's tax authority requirements; no Thai market presence found.
Deep Vietnam-specific compliance and SAP/ERP integration but no evidence of operations in any other SEA market.
No LINE OA or messaging-channel feature found; the product is an invoicing and tax-compliance platform.
No named Shopee, Lazada, or TikTok Shop integration found; built for accounting/ERP integration rather than marketplace sync.
Entry package is VND 300,000 for 300 invoices with unlimited validity, low-cost for small Vietnamese businesses.
- ✓Backed by a 20+ year Vietnamese IT vendor already serving 100,000+ businesses
- ✓Documented SAP integration built for a large enterprise customer (Coca-Cola Vietnam)
- ✓Prepaid package pricing with unlimited time validity, no forced monthly subscription
- ✓24/7 customer support and free long-term invoice data storage
- ×Vietnam-only; no evidence of support for other SEA countries' tax or invoicing regimes
- ×Prepaid package pricing requires manual renewal once invoices are used up
- ×Primarily documented in Vietnamese, which may add friction for non-Vietnamese-speaking finance teams
About E-invoice (Thai Son)
E-invoice is a hoa don dien tu (e-invoice) platform built by Hanoi-based Thai Son Technology Development Company, a Vietnamese IT vendor with more than 20 years of experience and over 100,000 businesses using its tax, customs, and social-insurance software. E-invoice issues invoices compliant with Vietnam's mandatory e-invoicing regulations, integrates with SAP, ERP, CRM, and existing accounting or sales software (including a documented SAP integration built for Coca-Cola Vietnam), and is sold in prepaid invoice-volume packages with unlimited validity until the package is used, for example 300 invoices for VND 300,000.
Key Features
Best For
Southeast Asia Fit
E-invoice is purpose-built for Vietnam's mandatory e-invoicing regime, a compliance requirement that most non-Vietnamese invoicing tools do not address natively. It is backed by Thai Son, a 20+ year Vietnamese IT vendor already serving over 100,000 businesses on tax, customs, and social-insurance software, and its integrations target SAP, ERP, and CRM systems used by large FDI enterprises like Honda, Toyota, Samsung, and Lotte operating in Vietnam. Pricing is in VND prepaid packages rather than USD subscriptions, and it has no evidence of operating outside Vietnam.
- Thailand fit
- 0/10 (Vietnam-only e-invoicing platform built for Vietnam's tax authority system; no Thai market presence found)
- SEA localization
- Deep for Vietnam (mandatory e-invoice compliance, SAP/ERP integration for FDI enterprises, HTKK/TVAN tax-filing integration); no evidence of operations outside Vietnam
- Vietnam
Integrations
- Other
- SAP
- ERP systems
- CRM systems
- HTKK tax filing
- ↗E-invoice is described as Vietnam's most popular e-invoice software among FDI enterprises, integrating with SAP, ERP, CRM, accounting, and sales software for automatic invoice issuanceverified 2026-09-02
- ↗Thai Son Technology Development Company has over 20 years of experience developing tax, customs, and social-insurance software, serving more than 100,000 businessesverified 2026-09-02
- ↗Thai Son's E-invoice offers 7 service packages by invoice volume with unlimited usage time; a 300-invoice web-version package costs VND 300,000verified 2026-09-02
- ↗Cong ty Phat trien Cong nghe Thai Son is headquartered in Hanoi and develops software for tax, customs, and social-insurance management, including E-invoiceverified 2026-09-02
- ↗E-invoice (Thai Son) Official Website
- ↗E-invoice (Thai Son) Pricing Plans
- ↗SEA Operational Audit 2026
We verify pricing and features via official vendor documentation and live platform audits. Software-listing.com is independent and may earn affiliate commissions from some links.
Related Analysis & Guides
The questions operators actually ask.
Does E-invoice by Thai Son integrate with SAP?
Yes, Thai Son has built and deployed a SAP integration for its E-invoice product, including a documented project automating e-invoicing for Coca-Cola Vietnam's SAP system.
How much does E-invoice cost?
E-invoice is sold in prepaid invoice-volume packages with unlimited time validity; the 300-invoice package costs VND 300,000, with larger packages available at different rates.
Is E-invoice available outside Vietnam?
No evidence was found of E-invoice operating outside Vietnam; it is built specifically around Vietnam's mandatory e-invoicing regulations and tax-authority systems.