ThunderPhone vs CallForMe for calling businesses
ThunderPhone is a platform for building voice agents: you write the prompt, pick a voice and model tier, connect a number, and pay from $0.02 to $0.09 per minute plus surcharges. CallForMe is a finished caller for one job, calling businesses for you, that your agent uses through one MCP URL at $1 per answered call.
Build or use
ThunderPhone is a voice agent platform for teams: inbound receptionists, outbound campaigns of up to 5,000 contacts, warm transfers, call grading, and test suites. CallForMe is a finished product for one use: your agent needs something from a business, and a phone call is how to get it.
Side by side
ThunderPhone facts are from its pricing page and MCP guide, checked October 2, 2026.
| ThunderPhone | CallForMe | |
|---|---|---|
| What you get | Parts to build and run any voice agent | A caller that runs errands for your agent |
| Price | $0.02 to $0.09/min by tier, hold $0.02/min, plus surcharges; numbers $1/mo | $1 per answered call incl. 5 min, $0.25/min after |
| Your work | Prompt, voice, model tier, number or SIP trunk, testing | None; describe the goal |
| MCP | Build agents, place calls with a configured agent, run campaigns | Place calls, answer questions mid-call, follow results |
| Phone menus and hold | Your agent's job, with keypad support | Built in |
| Questions back to your agent mid-call | You build it | Built in (answer_question) |
| Finding the business | Not part of the product | find_business and call_around |
| AI disclosure | Whatever your prompt says | Built in: "an AI assistant calling for you, on a recorded line" |
| Languages | 40+ | 17, with a live switch to Spanish and an automatic redial in the business's language |
| Inbound | Yes | Callbacks to our number only |
| Destinations | Many countries | US and Canada |
When to pick ThunderPhone
- You're building a voice product: a receptionist, reminders, or outbound calls to your own customers.
- Your calls are long or hold-heavy and you want the lowest per-minute rate.
- You need compliance paperwork like a HIPAA BAA.
When to pick CallForMe
- You want your agent to call a restaurant, a shop, or a clinic today, without designing a voice agent first.
- You want a structured result back: answers, prices, times, and a confirmation number.
- You make a handful of calls, and paying nothing for unanswered ones matters more than per-minute rates.
Other platforms: Vapi, Retell, Bland AI. Full tool list: MCP reference.
Questions
How much does ThunderPhone cost?
As of October 2026, ThunderPhone lists $0.02 per minute on Spark, $0.05 on Bolt, and $0.09 on Storm, with hold time at $0.02 per minute on every tier. Premium voices, some languages, supervision, and long prompts add surcharges. Numbers are $1 a month.
Does ThunderPhone have an MCP server?
Yes. Its MCP server at api.thunderphone.com lets Claude, ChatGPT, Codex, Cursor and others build agents, place calls with an agent you configured, run campaigns, and read transcripts.
Is ThunderPhone cheaper than CallForMe?
Per minute, yes, once your agent is built and tested. You also take on the prompt, phone number, caller reputation, and disclosure wording. CallForMe's $1 per answered call covers that, and unanswered calls cost nothing.
When should I build on ThunderPhone instead?
When you're shipping your own voice product, need inbound calls or campaigns to your own contacts, need many languages beyond the 17 CallForMe speaks, or need a HIPAA BAA.
Add CallForMe to your agent
One URL for any MCP agent. Connecting asks for nothing.