toolgrep / AI agents & frameworks / ThunderPhone
Alternatives to ThunderPhone
ThunderPhone: AI phone agents: build, test, and deploy production voice agents on one integrated stack. 8 products similar to ThunderPhone, compared on pricing, free tier, API, MCP server, SDK and open source. 7 of 8 have a free tier, 7 of 8 have an API, 6 of 8 offer an MCP server.
- DialogBrain
AI agent for WhatsApp, Telegram and calls
- agentsvc.io
Pay-per-call API marketplace for AI agents with 127 services settled in USDC via x402
- TaskFuel
Paid tools for your AI agent through one prepaid USD balance
- ErzyCall
Inbound, Outbound & WhatsApp AI
- PlaceCall
The real-world action layer for AI apps and agents
- LayerCall
Trust intelligence API for fraud prevention
- Fatstack
Pay-per-call tools for AI agents
- OutSystems
AI development platform combining a low-code foundation with AI-driven software development for enterprise apps and agents
Side by side
| Product | Pricing | Free tier | API | MCP server | SDK | Open source |
|---|---|---|---|---|---|---|
| ThunderPhone | Usage-based · from 2¢/min (Spark tier; Bolt 5¢/min, Storm 9¢/min; enterprise rates from 1¢/min) | — | yes | yes | — | no |
| DialogBrain | Usage-based | yes | yes | yes | — | no |
| agentsvc.io | Usage-based · from $0.002 per call | yes | yes | yes | no | — |
| TaskFuel | Usage-based | yes | yes | yes | no | no |
| ErzyCall | Freemium · from $14.99/month (AI Receptionist, billed annually; $29.99/month monthly). Outbound minutes from $19 per 100 minutes. WhatsApp plans from $39/mo for 1,000 contacts. | yes | yes | yes | — | no |
| PlaceCall | Usage-based | yes | yes | yes | yes | no |
| LayerCall | Freemium · from $0 | yes | yes | no | yes | no |
| Fatstack | Usage-based · from $0.0005 per call | — | yes | yes | yes | — |
| OutSystems | Freemium | yes | — | — | — | no |
Facts come from each product's own website, or from its verified owner when they have edited the listing. Each product page shows when it was last verified and how it was extracted. Similarity comes from the products' descriptions.
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