AI Accounting Software for Thai Businesses 2026: FlowAccount, PEAK, ACCOS, Paypers and Akon AI Compared
Where we're coming from
We make one of the products compared here, Akon AI, so every claim about the others is quoted from their own pages and dated, and anything their pages do not state is left unstated.
"AI accounting software Thailand" comes up often in buyer conversations. This page captures the framing we use from actual client work, not vendor-marketing slide decks.
Quick answer
Every Thai AI accounting tool we compared reads receipts or tax invoices with AI. They differ in how documents arrive, which tax work they do and who uses them. FlowAccount and PEAK are full accounting systems with free plans; ACCOS serves accounting firms and exports into the software they already use; Paypers takes bills over LINE and hands them on as Google Sheets; Akon AI is built for VAT-registered companies, checks input VAT on every document, works out P.P.36 and prepares the pack for the accounting firm (as of 10 Oct 2026).
Updated: 2026-10-10
Key takeaways
- AI document reading: FlowAccount (AutoKey), PEAK (OCR-assisted entry), ACCOS (AI document extraction), AccOS Pro (Agentic AI), Paypers and Akon AI.
- Documents over LINE: PEAK (LINE @PEAKConnect), ACCOS, Paypers and Akon AI, per each vendor's pages.
- P.P.36: FlowAccount totals it for filing from recorded documents; PEAK documents how to record it; Akon AI totals foreign services, computes the 7% VAT and reminds you before the 7th.
- AI agents over MCP: FlowAccount (AI Connector, every plan), PEAK (PRO Plus and PREMIUM), ACCOS (members) and Akon AI (Claude Code, Codex, Cursor).
- Free plans: FlowAccount, PEAK (Freelance), AccOS Pro (core ledger), Paypers (8 receipts a month) and Akon AI (10 documents a month); ACCOS offers a 100-token trial.
- Prices and features change; check each vendor's pricing page before deciding. This table uses what they published on 10 Oct 2026.
Decision guide
| Option | Best for | Watch out for |
|---|---|---|
| FlowAccount | Businesses that want a full accounting system with a lifetime free plan, AutoKey (AI OCR) bill reading, P.P.36 prepared from recorded documents, and Claude or ChatGPT access through AI Connector (MCP) on every plan | Standard is THB 199 a month billed monthly; the pages read do not state LINE or email document intake, and foreign expenses are entered from the receipt by hand |
| PEAK | Businesses and accounting firms that want a full system, with photos sent in through LINE @PEAKConnect on every plan and OCR-assisted entry from the e-Document plan up | The cheapest paid plan, e-Document, is THB 2,500 a year excluding VAT; P.P.36 is recorded with a manual adjusting entry per its manual, and the pages do not state that it prepares the form |
| ACCOS | Accounting firms whose clients send bills over LINE or email, with AI extraction of VAT and withholding and export into the accounting software already in use; an MCP server for Claude and Cursor | It keeps no ledger of its own; export to Express works today (PEAK and FlowAccount in testing); the pricing page shows no figures and offers a 100-token free trial |
| AccOS Pro | SMEs and accounting firms that want a free core ledger, several companies in one account, and Agentic AI reading receipts, tax invoices and bank statements | The AI is a paid add-on to the free core; documents come in through Google Drive; the pages do not state P.P.36 or LINE intake |
| Paypers | Freelancers, small business owners and accounting firms who send slips or bills over LINE for AI reading, synced monthly to Google Sheets and Google Drive for the accountant | The free plan takes 8 receipts a month; Lite is THB 1,890 a year excluding 7% VAT, with yearly and 3-monthly billing shown; the pages do not state P.P.36 |
| Akon AI (iReadCustomer) | Thai VAT-registered companies that outsource bookkeeping, especially those paying foreign software or cloud providers: documents arrive by email, LINE, Discord and folders; each one gets a verdict on input VAT and deductibility; P.P.36 is worked out; the month's pack goes to the accounting firm as one PDF; Claude Code, Codex and Cursor can connect | Built to work alongside your existing accounting firm and to pull documents from FlowAccount, not to replace the accountant; self-serve sign-up starts on a Free plan (10 documents a month), and paid-plan prices are not yet shown on its site |
Frequently asked questions
What is AI accounting software, and how is it different?
Software that uses AI to read receipts, tax invoices or payment slips and pull the vendor, amount and VAT into the system, and in some cases suggest the booking or tax treatment, instead of typing each field.
Which AI accounting tools take documents over LINE?
Per each vendor's pages on 10 Oct 2026: PEAK (LINE @PEAKConnect on every plan), ACCOS (clients send bills by LINE or email), Paypers (slips or bills over LINE) and Akon AI (photos in LINE or Discord chat). The FlowAccount and AccOS Pro pages we read do not state LINE document intake.
Which ones help with P.P.36?
FlowAccount totals input VAT from recorded documents to prepare P.P.36; PEAK documents how to record P.P.36 payable; Akon AI totals the month's foreign services, computes the 7% VAT and reminds you before the 7th. The ACCOS, AccOS Pro and Paypers pages do not state P.P.36.
Which ones connect to Claude or ChatGPT?
FlowAccount's AI Connector (MCP) works with Claude or ChatGPT free on every plan; PEAK lists PEAK MCP on PRO Plus and PREMIUM; ACCOS has an MCP server for Claude, Cursor, Claude Code and n8n; Akon AI connects Claude Code, Codex, Cursor or any MCP client with one command.
Is there free AI accounting software?
Free plans exist: FlowAccount (free for life), PEAK (Freelance), AccOS Pro (the core ledger; the AI is paid), Paypers (8 receipts a month) and Akon AI (Free plan, 10 documents a month); ACCOS offers a 100-token trial. Some AI features are paid-only, e.g. PEAK's OCR starts at e-Document.
How is a tax app for companies different from a personal tax app?
Most apps that come up for "tax app" in Thai, such as iTAX and RD Smart Tax, focus on personal income tax. A company deals with input and output VAT, P.P.30, P.P.36 and withholding tax, which is the work of accounting software or an assistant like Akon AI that checks the tax evidence on every document.
Which AI accounting tool should we choose?
For a full system you run yourself, start with FlowAccount or PEAK. For an accounting firm collecting many clients' bills, look at ACCOS or Paypers. For a VAT-registered company that outsources bookkeeping and pays foreign providers every month, Akon AI handles input-VAT evidence and P.P.36 directly.
Sources
- FlowAccount: AutoKey
- FlowAccount: ราคาแพ็กเกจ
- FlowAccount: ภ.พ.36 (Help Center)
- FlowAccount: AI Connector
- PEAK: แพ็กเกจและราคา
- PEAK: บันทึกค่าใช้จ่ายต่างประเทศและ ภ.พ.36
- ACCOS: โปรแกรมบัญชี AI สำหรับนักบัญชีและสำนักงานบัญชี
- ACCOS: ราคา
- ACCOS: MCP Server
- AccOS Pro
- AccOS Pro: AI Accounting
- Paypers
- Paypers: สำหรับสำนักงานบัญชี
- Akon AI
Our closest related service
Tax AI for Thai companies: Akon AI
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