Total Products under this Category: 58
Last updated: September 06, 2026
Why You Can Trust G2's Software Rankings:
G2's software rankings are built on verified user reviews, rigorous moderation, and a consistent research methodology maintained by a team of analysts and data experts. Each product is measured using the same transparent criteria, with no paid placement or vendor influence. While reviews reflect real user experiences, which can be subjective, they offer valuable insight into how software performs in the hands of professionals. Together, these inputs power the G2 Score, a standardized way to compare tools within every category.
Highlighted products: Vonage Communications APIs, Dexatel, Plivo, Telesign Verification, Melissa Data Quality Suite, Informatica Data Quality & Observability, MSG91, and IPQS.
Underlying data: [Grid® JSON](https://www.g2.com/categories/phone-verification/grids.json?focus%5B%5D=vonage-communications-apis&focus%5B%5D=dexatel&focus%5B%5D=plivo&focus%5B%5D=telesign-verification&focus%5B%5D=melissa-data-quality-suite&focus%5B%5D=informatica-data-quality-observability&focus%5B%5D=msg91&focus%5B%5D=ipqs)
SMSBulk is a reliable bulk SMS and SMS verification platform that helps businesses connect with their customers worldwide. Through a simple, developer-friendly API, companies can send marketing campaigns, notifications, alerts, and one-time passwords (OTP) for secure two-factor authentication (2FA).
SMSCode is a virtual phone number service for SMS verification across 200+ countries. Compatible with Google, WhatsApp, Telegram, Facebook, TikTok, and 500+ platforms. Pricing starts from $0.0044 per activation with no subscription required. Features include a full REST API for developers and bulk users, instant OTP delivery, and real non-VoIP numbers for higher success rates. Trusted by 100,000+ active users worldwide.
Achieve up to 30% dial-to-connect rates with SureConnect. Eliminate wasted dials on non-mobiles and voicemails, and empower your reps to book 3–5x more opportunities.
Average Rating: 5.0/5.0
Total Reviews: 4
AI-generated summary from verified user reviews
"SureConnect is drastically helping cold call pickup rates."
Rating: 5.0/5.0 stars
— Jake L.
"Essential Tool for Efficient Outreach and High Connect Rates"
Rating: 5.0/5.0 stars
— Nicholas P.
TellABot is a service that protects user privacy by providing temporary US phone numbers for receiving SMS online. A selection of free numbers is available for testing.
Stronger security. No user experience tradeoff. Build with Lookup API.
Veriphone is a phone number verification API
VirtualSMS is an SMS verification API that provides phone numbers from 145+ countries for receiving OTP codes. The service uses real SIM-backed phone numbers rather than VoIP, enabling verification on services that reject VoIP numbers including WhatsApp Business, Telegram, banking applications, and dating platforms. The platform offers a REST API with OpenAPI 3.1 specification, webhooks for asynchronous event notifications, WebSocket for real-time SMS delivery, and a Model Context Protocol (MCP) server for integration with AI agents such as Claude, Cursor, and ChatGPT. A legacy compatibility endpoint at /stubs/handler_api.php replicates the sms-activate API format, enabling migration from older providers without code changes beyond the base URL. Pricing is pay-per-use starting at $0.05 per OTP code, with no contracts, no minimum deposits, and automatic refunds on failed delivery. Payment options include credit cards, cryptocurrency (BEP20), and x402 stablecoin protocol on Base, Polygon, Arbitrum, and Optimism networks. Coverage includes 2,500+ services including WhatsApp, Telegram, Discord, Gmail, Snapchat, Tinder, banking applications, and e-commerce platforms. SDKs are available for PHP via Composer and a Node.js npm package for the MCP server. A free public price endpoint allows pricing queries without authentication.
SignalVerify Voice CLI Verification is a developer-friendly telecom testing tool that lets businesses verify exactly how their outbound voice calls appear to real customers across carriers and regions. Rather than relying on guesswork or synthetic testing environments, it uses a network of live SIMs and real devices to simulate actual call conditions — revealing whether your numbers are being labeled as "Spam Likely," mislabeled, or blocked before they ever reach your audience. Accessible directly from the command line or via API, it fits seamlessly into existing workflows and CI/CD pipelines, enabling engineering and operations teams to automate number identity checks, monitor call reputation across global markets, and fix trust issues proactively — all without needing to log into a dashboard.
WAChecker is a web-based tool for checking and validating WhatsApp phone numbers in bulk. Users can upload or enter lists of phone numbers, check whether the numbers are registered on WhatsApp, review verification results, and export the results. The tool is designed for businesses and teams that manage WhatsApp contact lists. It can be used to verify and organize contact data before customer communication, sales outreach, or lead generation activities.
ZelNum is a self-service bulk verification and data-quality platform for phone intelligence, messaging apps, social and consumer accounts, and crypto exchanges. Upload CSV or TXT files to validate phone status, live activity, carrier and line type, HLR-style network signals, phone model, and duplicate or invalid records. Run phone- and email-based account-signal checks across WhatsApp, Telegram, Facebook, TikTok, iMessage, RCS, Zalo, LINE, Viber, Instagram, LinkedIn, Snapchat, Signal, BAND, Amazon, Apple ID, and Microsoft, together with supported crypto exchanges such as Binance, KuCoin, CoinW, and HTX. Depending on the product, workflows can include activity, account-age, username, and selected profile signals. Export structured results for list cleaning, CRM preparation, messaging operations, community management, and data workflows. Developers can use task-based APIs for batch submission, status monitoring, and result retrieval.
