What is ThunderPhone?
Voice agents for real phone calls and website chats.
Who is ThunderPhone best for?
ThunderPhone is best for businesses that want AI agents to answer or place phone calls in 40+ languages.
Front desks and support lines
Agents pick up inbound calls at any hour, read keypad input, and hand the caller to a person with the context kept.
Outbound call campaigns
Upload up to 5,000 contacts from a CSV, set calling windows by time zone and retries, and follow progress live.
Teams watching call costs
One per-minute rate covers transcription, the model and the voice, and hold time is capped at 2¢ a minute on every engine.
Healthcare and EU businesses
It is HIPAA and GDPR compliant, and a BAA and DPA come at no extra charge.
How much does ThunderPhone cost?
ThunderPhone has no subscription: calls are prepaid by the minute at 2¢ on Spark, 5¢ on Bolt or 9¢ on Storm, and live calls need a card and at least $3 of balance.
- The cheapest engine
- Transcription, model and voice in one rate
- Strong audio understanding
- Faster replies than Spark
- Stronger instruction following
- Strongest audio understanding and instruction following
- Extra intelligence for 3¢ more a minute
There is no subscription or platform fee: you prepay a balance, at least $3 before the first live call, and it does not expire. Hold time costs 2¢ a minute on every engine, and calls bill in quarter-minute steps. Optional extras raise the rate: premium voices or less common languages 3¢ a minute, Storm acknowledgements 2¢, call supervision 4¢, and 1¢ to 2¢ for each extra 10K-token block once a prompt passes 5K tokens. A ThunderPhone US number costs $1 a month plus 1¢ a minute for inbound calls. Enterprise deals for high volume can go to 1¢ a minute or less. Full pricing on thunderphone.com. We checked these prices on .
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What are the best ThunderPhone alternatives?
Three tools on Recaply do ThunderPhone's job.
Questions about ThunderPhone
What is ThunderPhone?
Voice agents for real phone calls and website chats.
Who is ThunderPhone for?
ThunderPhone is best for businesses that want AI agents to answer or place phone calls in 40+ languages.
Is ThunderPhone free?
No. Signing up and building ThunderPhone agents costs nothing, but live calls need a payment method and at least $3 of prepaid balance, then bill from 2¢ a minute. Simulated test calls with an AI caller are billed as real calls too.
How much does ThunderPhone cost?
ThunderPhone's paid plans are Spark at 2¢ per call minute, Bolt at 5¢ per call minute and Storm at 9¢ per call minute.
What are the best ThunderPhone alternatives?
The closest alternatives on Recaply are Synthflow AI, Vapi and Revmo.
Where can I try ThunderPhone?
On its official website, thunderphone.com.
How does ThunderPhone bill hold time and voicemail?
Hold time costs a flat 2¢ a minute on every ThunderPhone engine, however long the queue. Voicemail and phone-menu time bill at the engine's normal rate, and a call that goes straight to voicemail counts as one billable minute at most.
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