Spark usage
From $0.02/min
USD per live minute; add-ons and telephony separate
- Included scope
- Base voice-agent stack
ThunderPhone
● Identity checkedVoice agents and call infrastructure · Official-source review 2026-10-09
ThunderPhone runs inbound and outbound voice agents with SIP, web widgets, knowledge retrieval and call monitoring. It supports transfers, DTMF and dashboard/API campaign workflows.
- Category
- Voice agents and call infrastructure
- Free access
- Start free is advertised; recurring free minutes and initial credit quantity were not verified.
- API access
- Call and campaign APIs and SIP integration are documented; optional numbers and carrier usage have separate terms.
Is ThunderPhone right for you?
A good fit for
Relevant to teams evaluating approved support or scheduling calls with a human fallback.
Before you choose
Base live rates are Spark $0.02/min, Bolt $0.05 and Storm $0.09; hold time is $0.02/min. Storm intelligence adds $0.03, acknowledgements $0.02 and watchdog $0.04/min. Selected voices/languages add $0.03; prompts beyond 5,000 tokens add tier-specific charges per 10,000-token block. Vendor US numbers cost $1/month plus $0.01/min inbound; outbound carrier is separate. Benchmark accuracy, compliance and lowest-price claims were not independently validated.
Workflow and handoff
Use consented test calls, include noisy and ambiguous cases and verify total rate, approved instructions and human transfer before deployment.
Pricing and practical limits
Base live rates are Spark $0.02/min, Bolt $0.05 and Storm $0.09; hold time is $0.02/min. Storm intelligence adds $0.03, acknowledgements $0.02 and watchdog $0.04/min. Selected voices/languages add $0.03; prompts beyond 5,000 tokens add tier-specific charges per 10,000-token block. Vendor US numbers cost $1/month plus $0.01/min inbound; outbound carrier is separate. Benchmark accuracy, compliance and lowest-price claims were not independently validated.
Review method
Official product evidence reviewed on 2026-10-09; product artwork inspected visually. No hands-on vendor application test was performed. Application performance, security claims and plan enforcement were not independently tested.
What it can do
Features & capabilities
Unknown is different from unavailable. Each fact carries its own evidence.
| Capability | Value | Evidence | Checked |
|---|---|---|---|
| Product workflow | ThunderPhone runs inbound and outbound voice agents with SIP, web widgets, knowledge retrieval and call monitoring. It supports transfers, DTMF and dashboard/API campaign workflows. | Facts sourced | 2026-10-09 |
| Pricing and restrictions | Base live rates are Spark $0.02/min, Bolt $0.05 and Storm $0.09; hold time is $0.02/min. Storm intelligence adds $0.03, acknowledgements $0.02 and watchdog $0.04/min. Selected voices/languages add $0.03; prompts beyond 5,000 tokens add tier-specific charges per 10,000-token block. Vendor US numbers cost $1/month plus $0.01/min inbound; outbound carrier is separate. Benchmark accuracy, compliance and lowest-price claims were not independently validated. | Facts sourced | 2026-10-09 |
Understand the total cost
ThunderPhone pricing & plans
Bolt usage
From $0.05/min
USD per live minute; add-ons separate
- Included scope
- Faster-response tier
Storm usage
From $0.09/min
USD per live minute; optional extras separate
- Included scope
- Higher-capability audio tier
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Explore toolThe practical questions
Frequently asked questions
Was the application hands-on tested?
No. This listing is based on dated official-source evidence and a visual artwork check. Unconfirmed costs and restrictions are identified explicitly.
What is ThunderPhone used for?
ThunderPhone runs inbound and outbound voice agents with SIP, web widgets, knowledge retrieval and call monitoring. It supports transfers, DTMF and dashboard/API campaign workflows.
Does ThunderPhone have a free plan?
Start free is advertised; recurring free minutes and initial credit quantity were not verified.. This record does not confirm an ongoing free plan.
How much does ThunderPhone cost?
From $0.02/min. See the billing terms below. See the plan cards for entitlements, billing commitments and seat minimums.
Can I use ThunderPhone through an API?
Call and campaign APIs and SIP integration are documented; optional numbers and carrier usage have separate terms.. API access and subscription access may have different terms; consult the linked sources.
What should I check before choosing it?
Base live rates are Spark $0.02/min, Bolt $0.05 and Storm $0.09; hold time is $0.02/min. Storm intelligence adds $0.03, acknowledgements $0.02 and watchdog $0.04/min. Selected voices/languages add $0.03; prompts beyond 5,000 tokens add tier-specific charges per 10,000-token block. Vendor US numbers cost $1/month plus $0.01/min inbound; outbound carrier is separate. Benchmark accuracy, compliance and lowest-price claims were not independently validated.
Price history
No retained pricing changes yet. A current price alone does not establish a historical trend.
How this profile is supported
Official product information
Current official product source read individually; product artwork inspected visually.
Read original source ↗Pricing review
Official pricing and billing restrictions read individually.
Read original source ↗Facts apply to the named version and check date. Send a sourced correction if something changed.