Numverify

Numverify is a REST API that checks national and international phone numbers and returns results in JSON. It supports validation in 232 countries, using regularly updated numbering plans with syntax rules and carrier, line type, and location data. Responses can include validation status, local and international formats, country, location, carrier, and line type. Businesses may use these checks when cleaning contact databases, reducing undelivered messages, or helping prevent fraud. Developers can make URL requests and connect the API to apps and CRMs using standard REST calls; the site also describes a Zapier integration with Google Forms. API connections use 256-bit HTTPS encryption. The pricing FAQ says phone numbers are used only for validation and are not stored or processed for another purpose. Users can track daily or monthly usage and receive alerts as they near their allowance. Overage fees apply after the monthly request allowance is exceeded, with notifications at 75%, 90%, and 100% of quota. The free plan provides 100 requests per month for non-commercial use. Paid plans begin at $14.99 a month, and the Basic plan includes 5,000 API requests.

Numverify provides phone-number validation through a REST API with JSON responses and usage monitoring. Check the request allowance and commercial-use terms, since overages apply beyond plan limits.

Numverify suits developers and businesses that need phone-number validation in apps, CRMs, or contact-data workflows. Its free allowance is restricted to non-commercial use.

Numverify is a REST API for checking national and international phone numbers in software workflows. It best fits developers and businesses that need broad country coverage plus carrier and line-type data, while the free tier is mainly useful for evaluation. The strongest case is straightforward integration; the main caution is matching request volume and commercial terms before traffic reaches the quota.

Overview

Numverify validates numbers in 232 countries and returns JSON suitable for applications, CRMs and automated form processes. Its results can support contact-database cleanup, reduce messages sent to invalid destinations and add information to fraud-review workflows. Validation data is an input to those processes, not a guarantee that a transaction or subscriber is legitimate.

The service is built and maintained by APILayer, an Austrian technology company. Usage dashboards show daily or monthly consumption, and automatic notices arrive at 75%, 90% and 100% of an allowance. Once a monthly allowance is exhausted, overage fees apply, so high-volume users need monitoring and budget controls.

Key features

Responses may include validation status, local and international formats, country, location, carrier and line type. That combination is more useful than a simple valid-or-invalid result: teams can normalize stored numbers and route or review records based on carrier and line-type information. Numverify says its numbering plans, syntax rules and related carrier, line-type and location data are regularly updated.

Integration uses standard URL-based REST requests and portable JSON. A Zapier connection can link Numverify with Google Forms, which suits intake workflows that do not justify custom middleware. The API can also be called from apps and CRMs, but no specific SDKs are identified, so developers should plan around direct REST requests.

API connections use 256-bit HTTPS encryption. The pricing FAQ says phone numbers are processed for validation and not stored or used for another purpose, an important consideration for teams handling customer contact data.

Pricing

Numverify is freemium, with paid plans from $14.99 per month. The Free Plan has no listed price, includes 100 API requests per month without a time limit, uses 256-bit HTTPS encryption and is restricted to non-commercial use. It works for a small proof of concept, but the low cap rules it out for active customer or production traffic.

The Basic Plan costs $14.99 a month for 5,000 API requests, commercial use, Standard Support and 256-bit HTTPS encryption. It is the sensible entry tier for a modest application, provided 5,000 monthly lookups and possible overages fit the workload.

The Professional Plan is $59.99 a month for 50,000 requests with commercial use, Standard Support and the same encryption. It suits growing products that would quickly outgrow Basic without needing enterprise support. The Enterprise Plan costs $129.99 a month and raises the allowance to 250,000 requests, retaining commercial use, Standard Support and encryption for substantially busier services.

The Custom Plan has custom pricing, unlimited requests and dedicated technical support. It is the appropriate route when predictable quota planning or direct technical assistance matters more than a published monthly rate. Paid plans include Standard Support; the free tier is non-commercial.

Platforms

Numverify is delivered through an API. Its REST and JSON design makes it portable across application stacks, while the Zapier connection provides a no-code bridge for Google Forms workflows.

Who it's for

Choose Numverify if you need international phone validation embedded in an app, CRM or intake process, especially when carrier, location and line-type fields are useful downstream. Basic fits smaller commercial workloads; Professional and Enterprise are for higher monthly volumes. It is not a good production choice for a commercial service that can remain within only 100 requests, because that allowance is non-commercial and too limited for most live use.

Pros and cons

Pros

• 232-country coverage: useful for services operating across national numbering systems.
• Rich response fields: formats, carrier, location and line type support normalization and follow-on decisions.
• Portable integration: standard REST calls, JSON and a Google Forms Zapier connection reduce integration friction.
• Consumption visibility: daily or monthly tracking and threshold alerts make quota management practical.
• Privacy and transport safeguards: 256-bit HTTPS is stated for every API connection, with numbers used only for validation.

Cons

• Small free allowance: 100 requests per month and non-commercial terms limit it to evaluation.
• Overage exposure: charges begin after a plan's monthly allowance, so poorly forecast traffic can increase cost.
• No named SDKs: teams wanting maintained language-specific clients must work with REST directly.
• Support varies by tier: dedicated technical support is reserved for custom enterprise arrangements.

Alternatives

For a free Android-focused testing tool rather than a phone-validation API, choose Accessibility Test Framework for Android.

Vonage SMS API is the better fit when the requirement is sending SMS through usage-based, country- and number-type-dependent pricing.

Choose Neutrino Phone Validate if a freemium API with a lower-cost £8 Tier 1 option and limited daily free requests matches your volume.

PhoneValidationAPI is worth considering when 6,000 requests on its $14.99 Basic plan or 60,000 on Professional better match your quota needs.

Choose Twilio Lookup when you want separate formatting/validation and line-status services with usage-based line-status pricing.

Veriphone suits teams wanting 1,000 monthly free validations with bulk CSV, API, carrier and line-type data.

Abstract Email Validation API is an alternative for email rather than phone-number validation workflows.

Choose IPQualityScore Phone Validation API if its tiered per-user lookup pricing and 1,000 free monthly lookups better fit your volume model.

See the Phone Number Validation Software list for more options.

Verdict

Numverify is a strong choice for developers and businesses needing a focused, international phone-validation API with useful carrier and line-type results, clear usage alerts and simple REST integration. Choose it when the 232-country coverage and response fields justify a paid quota. Look elsewhere if you need a larger free allowance, named SDKs or pricing that avoids overage concerns.