English
Call Answering

ThunderPhone

AI voice agents that handle inbound and outbound calls with high accuracy, multilingual support, and cost-effectiveness.

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thunderphone.com
Verified API available
What is it AI voice agents that handle inbound and outbound calls with high accuracy, multilingual support, and cost-effectiveness.
Pricing Paid
Free tier No
Platform Web Application
API Yes
Best for automating customer support calls, running outbound sales or reminder campaigns
Domain registered 2012

Data updated Sept. 19, 2026

What does ThunderPhone do?

ThunderPhone provides advanced AI voice agents designed to manage phone calls with exceptional accuracy and efficiency. It excels at handling complex conversations that other voice AI systems might struggle with, offering a reliable solution for various business needs. The platform supports both inbound and outbound call scenarios, making it versatile for customer support, sales, and operational communications.

What makes ThunderPhone stand out is its record-setting accuracy, achieving 99.4% on the Big Bench Audio benchmark, which measures how well voice AI models respond to challenging questions. It also boasts support for over 40 languages, intelligently detecting and switching languages mid-conversation, and understanding various accents. The system is built to handle real-world call complexities like interruptions, background noise, DTMF capture, and even voicemail detection, ensuring smooth and effective interactions. Users can manage agents through a no-code platform, integrate via API, or opt for custom enterprise solutions.

Businesses looking to automate and optimize their phone communications will find ThunderPhone highly beneficial. It's particularly useful for customer service departments needing to handle a high volume of inquiries, sales teams running outbound campaigns, or any organization requiring multilingual support without the high cost of human agents. Its compliance features (HIPAA & GDPR) also make it suitable for regulated industries like healthcare.

Call AnsweringLive translationsVoice Assistants

Key features

What makes it stand out
01
Record-setting accuracy on voice AI benchmarks (99.4% on Big Bench Audio)
02
Supports 40+ languages, understanding accents and switching mid-conversation
03
Handles inbound and outbound calls, including bulk campaigns with pacing and retries
04
Optimized for real-world calls with HIPAA/GDPR compliance, DTMF capture, and interruption handling
05
Offers no-code platform, API access, and enterprise solutions for custom deployments

Who is ThunderPhone for?

Who benefits most from this tool
automating customer support calls
running outbound sales or reminder campaigns
handling multilingual phone interactions

Pricing

Spark

Custom
  • 0.02 per minute rate
  • Inbound & outbound calls
  • SIP trunking
  • Web voice widgets
  • 40+ languages understood
  • Curated voice library
  • Testing & simulations
  • Monitoring & transcripts
  • Transfers & DTMF
  • Bring your own TTS

Bolt

Custom
  • 0.05 per minute rate
  • Inbound & outbound calls
  • SIP trunking
  • Web voice widgets
  • 40+ languages understood
  • Curated voice library
  • Testing & simulations
  • Monitoring & transcripts
  • Transfers & DTMF
  • Bring your own TTS

Storm

Custom
  • 0.09 per minute rate
  • Inbound & outbound calls
  • SIP trunking
  • Web voice widgets
  • 40+ languages understood
  • Curated voice library
  • Testing & simulations
  • Monitoring & transcripts
  • Transfers & DTMF
  • Bring your own TTS

Trust & presence

Domain Domain registered 2012

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