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AI phone agents in Thai

ThunderPhone supports Thai across the product: agents can speak and understand Thai on live phone calls, the dashboard ships with a Thai interface, and a Thai documentation edition is available. Thai is one of the platform's 47 supported voice languages, with eight compatible voices in the current catalog.

A team can build in the Thai dashboard, give callers a natural Thai voice experience, and consult Thai product docs without leaving the platform.

Thai voice availability and pricing

The current catalog includes eight voices that support Thai:

  • six multilingual voices; and
  • two premium Thai voices, Narin and Chakrit.

Thai uses a premium language path at +3¢ per minute, which applies to all Thai-compatible voices. That makes the engine-plus-language rate:

  • Spark: 2¢ + 3¢ = 5¢/minute
  • Bolt: 5¢ + 3¢ = 8¢/minute
  • Storm: 9¢ + 3¢ = 12¢/minute

Pricing is pay as you go with no subscription, and these illustrative figures exclude telephony and other optional charges. The agent builder shows the current all-in rate as settings change.

Judge voice quality against your real call traffic. Thai is a tonal language with its own conventions for politeness particles, names, and transliterated English terms, so test the names, addresses, numbers, and loanwords your callers actually use, and preview each shortlisted voice in the builder before deployment.

Thai in the dashboard and documentation

Thai is a shipped dashboard locale, not just a call setting. A team can configure prompts, review calls and transcripts, and manage the organization from the Thai interface.

ThunderPhone publishes a Thai documentation edition served on the main site; it is machine-translated from the governing English docs, so keep the English docs one click away for exact wording.

Thai and English in one call

An agent starts in its primary language and can switch automatically when a caller uses a configured additional language. Set Thai as primary with English as additional—useful for lines that serve both local callers and international visitors—or the reverse, and one agent covers both without a phone tree.

The chosen voice must support every selected language. Test realistic switching, especially around hotel names, street addresses, and booking references where callers commonly move between Thai and English mid-sentence.

Sample Thai call experience

The following flow is written in English to describe the caller experience.

Agent starts in Thai: Greets the caller politely, identifies the business, and asks how it can help.

Caller answers in Thai: Says they want to confirm tomorrow's reservation.

Agent continues in Thai: Confirms the caller's name and looks up the approved reservation record.

Caller switches to English: "Could you change it to seven thirty instead?"

Agent switches to English: Confirms the requested time is available and asks the caller to confirm the change.

Caller returns to Thai: Confirms and asks about parking.

Agent returns to Thai: Answers from the approved knowledge source, repeats the final reservation details, and closes the call.

The switch happens within the same call; the caller never hangs up or navigates a language menu.

Build and test a Thai agent

  1. Set Thai as the primary language, or add it to an agent's additional languages.
  2. Choose one of the eight voices that supports the complete selected language set.
  3. Confirm the displayed +3¢ per-minute language surcharge in the builder.
  4. Write the operating prompt in the language your team can review most reliably, and attach only approved knowledge and integrations.
  5. Run Thai-only and mixed Thai-English simulations covering the names, numbers, and loanwords your callers actually use.
  6. Review transcripts, pronunciation, tool actions, transfers, and fallback behavior before deployment.

Frequently asked questions

Does ThunderPhone support Thai voice calls?

Yes. Thai is one of ThunderPhone's 47 supported voice languages and currently has eight compatible voices in the catalog.

How much does Thai cost?

Thai adds 3¢ per minute to the selected engine rate. The engine-plus-language rate is therefore 5¢ on Spark, 8¢ on Bolt, or 12¢ on Storm, before telephony and other optional charges. Pricing is pay as you go with no subscription.

Are premium Thai voices available?

Yes. The catalog lists two premium Thai voices, Narin and Chakrit, alongside six multilingual Thai-compatible voices. All Thai-compatible voices are on the +3¢ premium language path.

Is the dashboard available in Thai?

Yes. Thai is a shipped dashboard locale, so builders can use the product interface in Thai.

Are the ThunderPhone docs available in Thai?

Yes. ThunderPhone publishes a Thai documentation edition served on the main site. It is machine-translated from the governing English docs, so keep the English docs nearby for exact wording.

Can a Thai agent switch to English during a call?

Yes. Add English as an additional language and choose a voice that supports both. The agent can switch automatically when the caller changes language mid-call.