
Grizzly SMS
SMSCode.gg
SMS-Activate.guru
quackr
SMS-man.com
CodesSender
Textverified
Real SIM cards for OTP verification — 145+ countries, 2500+ services (WhatsApp, Telegram, Discord). From $0.05/code. API + MCP server for developers and AI agents.

Website, pricing, platforms and company facts side by side.
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| Website | virtualsms.io | codegres.org |
| Pricing | — | |
| Platforms | — | |
| Company | 10 - 19 employees · 2025 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


VirtualSMS is a developer-first SMS verification API that uses real SIM-backed phone numbers, not VoIP. Receive OTP codes for any service that sends SMS — built for signup testing, account verification, 2FA flows, and autonomous AI agent workflows. Why VirtualSMS Real SIM numbers work where VoIP...
No description of Codegres.org yet.
What each product offers, as listed by its team.


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As answered by people managing VirtualSMS.io and Codegres.org.
VirtualSMS.io's answer
VirtualSMS uses real SIM-backed phone numbers, not VoIP — so it works with services that reject VoIP (WhatsApp Business, Telegram bot at scale, banking apps, dating platforms). It's also the only SMS verification API that ships with an MCP server for AI agents and x402 stablecoin payment support — making it the first SMS API designed for both developers and autonomous AI agents.
VirtualSMS.io's answer
Three reasons:
Real SIM numbers work where VoIP fails. Most competitors (5SIM, SMS-Activate, SMSPVA) lean heavily on VoIP. That gets blocked by services that matter — WhatsApp Business, banking apps, dating platforms. Our numbers don't.
Built-in MCP server for AI agents. Claude, Cursor, ChatGPT, and any MCP-compatible AI agent can handle phone verification autonomously through our MCP server. No other SMS API in this category ships with this.
Pay-per-use, no contracts, no minimum deposit. From $0.05/code. Free API key. Public price endpoint lets you check pricing before signing up. Auto-refund on failed deliveries. x402 stablecoin payments for international developers who want to skip KYC.
VirtualSMS.io's answer
Developers building OTP-dependent workflows: signup testing, QA automation, account verification at scale, and onboarding flows.
Growing segment: AI agent builders using MCP-compatible tools (Claude Code, Cursor, ChatGPT) that need autonomous phone verification capability.
Also: teams migrating from legacy SMS verification providers that no longer meet their needs — either because their suppliers shut down or because their numbers are now blocked as VoIP.
VirtualSMS.io's answer
VirtualSMS launched because every SMS verification API on the market was either VoIP-only — rejected by WhatsApp, banking apps, and most major services — or built around legacy plain-text protocols that modern AI agents couldn't use natively.
We started with a modern REST API and real-SIM-backed numbers. We added an MCP server from day one, making us the first SMS verification service designed for both developers and autonomous AI agents. x402 stablecoin payment support followed — removing KYC friction for international developers who'd been priced out of legacy providers.
VirtualSMS.io's answer
REST API over HTTPS with OpenAPI 3.1 specification
TypeScript MCP server (Model Context Protocol)
Mintlify-hosted developer documentation
x402 stablecoin payment protocol on Base / Polygon / Arbitrum / Optimism
WebSocket for real-time SMS delivery notifications
Webhook event notifications for async integration
sms-activate-style legacy compatibility endpoint (/stubs/handler_api.php) for drop-in migration
VirtualSMS.io's answer
-AI agent platforms integrating our MCP server for autonomous phone verification
-E-commerce QA automation teams testing signup and checkout flows
-Crypto-native developer projects using x402 stablecoin payments
-Developers migrating from sms-activate-style legacy providers
Share your experience with using VirtualSMS.io and Codegres.org. For example, how are they different and which one is better?
When comparing VirtualSMS.io and Codegres.org, you can also consider the following products.

Grizzly SMS offers to get temporary phone numbers for OTP from any popular service. Here you can get a virtual mobile number for SMS verification of any country in the world. ✅ Legal service. ✅ Best price
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Buy virtual numbers to receive SMS online for OTP verification. Temporary phone numbers with real SIM, fast activation, 100+ countries. A reliable sms-activate alternative.
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SMS-Activate is a service for sale and rent of virtual numbers of more than 180 countries. We provide virtual numbers in most countries of the world so that you can use them to receive an SMS with a confirmation code online.
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Temporary Phone Numbers & Virtual Numbers for SMS Verification
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SMS-man offers a virtual numbers to receive SMS and create multiple accounts on WhatsApp, Telegram, Instagram, Twitter, Amazon and others. The SMS-man service provides numbers of such countries as China, US, India, Russia, UK, Germany, Ukraine etc.
Compare SMS-man.com to VirtualSMS.io or Codegres.org:

Temp phone numbers for SMS verification — 150+ countries, 100+ service
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