ThunderPhone

Build and run AI phone agents for inbound and outbound calls.

ThunderPhone is a cloud voice-agent platform for handling inbound calls and automated outbound campaigns. Teams can configure agents in a no-code dashboard or use its API, with telephony, knowledge retrieval, live supervision, and multilingual conversations built in.

Agenticness = how independently a tool can take action, scored across 9 dimensions. Scored independently by David Kooi, Skylark Creations — see full rubric → Last re-evaluated 16 September 2026.

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Web

API

Voice

B2B

For Developers

Usage-Based

Cloud Hosted

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Recent activity

What's happened with ThunderPhone lately

September 16, 2026
Score change
Agenticness score 15 → 18 ↑15 → 18/36(+3)

News mentions sourced from our news feed; score changes from periodic re-evaluations.

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About

What It Is

ThunderPhone is a cloud platform for businesses that want AI agents to answer and place phone calls. It is aimed at customer-support, scheduling, front-desk, pre-sales, and reminder workflows, rather than being a general-purpose personal assistant....

What to Know

ThunderPhone is unusually focused on production call handling: it combines transcription outputs with direct audio-to-LLM input, supports interruptions, transfers, DTMF input, voicemail detection, and live human supervision. Its published materials...

Key Features

Runs inbound phone agents and native outbound calling campaigns

Launches calls through a dashboard or POST /v1/calls API

Uploads CSV contact lists of up to 5,000 contacts for campaigns

Applies timezone-based calling windows, pacing, retries, and live campaign tracking

Supports PSTN, HD Voice, SIP trunking, and embedded web or app voice experiences

Use Cases

Operate a 24/7 front-desk agent that answers inbound calls and routes callers to a person when needed

Run appointment scheduling or reminder calls with retries and calling windows that respect each contact’s timezone

Automate first-line customer support using answers grounded in uploaded company documents

Agenticness: Adaptive Collaborator

Proposes and executes multi-step plans with your approval.

High evidence

Last evaluated: Sep 16, 2026

Dimension Breakdown

Action Capability

Autonomy

Planning

Adaptation

State & Memory

Reliability

Interoperability

Safety

Operator Sovereignty

How agenticness works →

When ThunderPhone changes its pricing, we catch it the next morning

We recrawl every tool in this directory daily. AI Insider is the 3-minute brief on what actually changed — pricing, features, score moves on our 36-point rubric — often before any press coverage. Sent daily. Skipped when nothing happened.

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When ThunderPhone changes its pricing, we catch it the next morning

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