Agent builder with tier selection
Describe the job in plain language, choose a voice, and pick Spark, Bolt, or Storm. The platform handles deployment from there.
ThunderPhone
ThunderPhone is an AI phone agent platform for building, testing, and running production voice agents over real calls and embedded web voice experiences. It supports inbound and outbound calls, web voice widgets, live supervision, and multilingual conversations, with usage-based pricing starting at 2¢/min.
Overview
ThunderPhone is an AI phone agent platform for building, testing, and running production voice agents over real calls and embedded web voice experiences. The product is presented as a single stack for setup, deployment, monitoring, and iteration, with both a dashboard workflow and API access.
The platform supports inbound and outbound calling, web voice widgets, testing and simulation, live supervision, and multilingual conversations. Pricing is usage-based, starting at 2 cents per minute, with separate intelligence tiers and no platform fee.
Core features
Automated testing and simulations
Run text or audio test scenarios before launch, including human-to-AI and AI-to-AI cases, and use the resulting calls as regression tests.
Observability and live supervision
Monitor live and completed calls with analytics, issue grouping, alerts, and the ability to watch calls in progress and whisper guidance mid-conversation.
Telephony and channel support
Connect telephony through native SIP trunking or by importing a VoIP provider, and support inbound, outbound, web, and app-based voice workflows.
Integration setup
Paste a cURL command, OpenAPI spec, or Postman collection to wire integrations automatically, with support for CRMs, calendars, APIs, MCP servers, and knowledge bases.
Knowledge grounding
Use built-in retrieval to ground agents in uploaded documents, then test search and deploy from the same control room.
Common use cases
Inbound support and front desk routing
Answer customer calls with an agent that follows a prompt, uses tools, and hands off to a human when needed.
Outbound campaign automation
Run survey, follow-up, reminder, and confirmation calls in bulk, with pacing and retries for outbound campaigns.
Web and in-app voice experiences
Add click-to-talk voice interactions to a website or app without requiring a phone number, using the embeddable widget.
Test-driven voice workflows
Build agents that are checked with canned scenarios before deployment, so regressions can be caught before customers hear them.
Managed production calling
Use live supervision and whisper guidance for production calls where operators need to monitor quality or intervene during a call.
Pros and Cons
Pros
- Supports both dashboard-based and API-based workflows, which makes it usable for operators and developers.
- Covers the full lifecycle from prompt writing and testing to monitoring and live supervision.
- Includes telephony, web voice, transcripts, transfers, DTMF, and testing on the standard platform.
- Offers multilingual support and language switching during live calls.
- Pricing is published and starts at a low per-minute rate with no platform fee.
Cons
- The provided sources do not include a complete integration catalog or detailed limitations for every supported connector.
- Security and compliance information is only partially shown in the collected excerpt, so enterprise assurance details are not fully visible here.
- Some pricing add-ons apply for premium voices, certain languages, long prompts, and supervision features, so the base per-minute rate does not cover every configuration.
FAQ
How do you get started with ThunderPhone?
ThunderPhone provides documentation for both dashboard-based setup and API-based setup. The dashboard quickstart walks through creating an agent, setting up billing, adding a phone number, running a simulation, and reviewing the call.
What is ThunderPhone used for?
The source pages describe ThunderPhone as a platform for real phone calls, embedded web voice, outbound campaigns, testing, monitoring, and live supervision. It is positioned for production voice agents rather than a single-purpose call widget.
Can ThunderPhone connect to other tools and systems?
ThunderPhone supports a no-code front end, direct API access, and enterprise deployments. The docs also mention webhooks, a widget component, and integrations with tools such as CRM systems, calendars, APIs, MCP servers, and knowledge bases.
How does ThunderPhone pricing work?
Pricing starts at 2 cents per minute on the Spark tier, with Bolt at 5 cents per minute and Storm at 9 cents per minute. Hold time is billed at a flat 2 cents per minute on every tier, and there is no platform fee.
Does ThunderPhone support regulated use cases?
The source describes HIPAA and GDPR compliance, with BAA and DPA available at no extra charge. The security page also indicates documented compliance practices, but the provided excerpt is partial.
Quick Facts
- Category
- AI Phone Agents
- Platform
- Web app, API, and embedded web widget
- Primary workflows
- Inbound support, outbound campaigns, web voice, test-driven agents
- Pricing model
- Usage-based per-minute pricing starting at 2¢/min
- Languages
- 47 languages on the homepage; 40+ understood on the pricing page
- Domain
- thunderphone.com
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