Leading Phone Validation Technology Since 2015
We're on a mission to revolutionize SMS marketing and reduce communication costs. From startups to Fortune 500, we help businesses verify phone numbers with 99.6% accuracy across 232 countries, reducing SMS costs by 40%.
Our Journey
From SMS Struggles to Global Phone Validation
Late 2015: We started as a small team frustrated by failed SMS campaigns, wasted marketing budgets on invalid phone numbers, and the lack of reliable phone validation solutions. Every business was losing 30-40% of their SMS budget to invalid numbers.
The "Aha" Moment: If we're struggling with phone number validation, so are millions of other businesses worldwide. Why not build the most accurate phone validation service and help companies reduce SMS costs globally?
Today: We serve over 50,000 developers and 5,000+ companies, validating billions of phone numbers monthly across 232 countries. From solo developers to Fortune 500 enterprises, we help reduce SMS costs by 40% and improve campaign effectiveness.
"We don't just validate phone numbers. We help businesses communicate more effectively while reducing costs and improving customer engagement."
- Founding Team
Our Growth Timeline
Our Core Values
Developer First
We build what developers actually need, not what we think they need.
Simplicity Wins
Complex problems deserve simple solutions. One API call should do the job.
Reliability Obsessed
99.99% uptime isn't a goal, it's a minimum. Your code depends on us.
Fair Pricing
Start free, scale affordably. No surprises, no vendor lock-in.
What We Do Best
Advanced Phone Validation
Detect mobile vs landline, carrier information, and VoIP numbers with 99.6% accuracy across 232 countries.
Fraud Prevention
Protect your SMS campaigns from invalid numbers and reduce bounce rates by identifying disposable and fake phone numbers.
Cost Optimization
Reduce SMS costs by 40% by filtering out invalid numbers before sending messages. Real-time validation with < 50ms response time.
Developers Love Us
"Phone-Check.app's APIs saved us 6 months of development time. Their uptime is incredible."
Sarah Chen
CTO at TechStartup
"From prototype to production, Phone-Check.app scales with us. Best developer experience ever."
Marcus Rodriguez
Lead Developer at Scale
"The documentation is perfect, support is instant. It just works."
Emily Watson
Founder at BuildFast
Why 50,000+ Developers Choose Phone-Check.app
Professional Service
Enterprise-grade phone validation API with instant setup.
5-Minute Integration
RESTful APIs with SDKs for all major languages.
99.99% Uptime SLA
Enterprise-grade reliability you can depend on.
Global Infrastructure
CDN-backed, multi-region for lowest latency.
SOC 2 Certified
Bank-level security and compliance.
No Vendor Lock-in
Standard formats, easy migration, your data.
Built by Developers, for Developers
We're a team of engineers, designers, and product builders who've felt your pain. Every API we build solves a problem we've faced ourselves.
Our Promise: We'll never build features you don't need, charge for things that should be free, or make simple things complicated. We're developers too, and we build what we'd want to use.
Join 50,000+ Developers Building with Phone-Check.app
Get instant access to professional phone validation. Scale to billions with transparent pricing.
Questions? Reach out at hello@phone-check.app or contact us here