Top 10 free phone validator APIs

Last Updated Feb 19, 2022
Emma Jagger

Engineer, maker, Google alumna, CMU grad

Table of Contents:

In an era where everything is digital first, it’s easy to forget that something that we all still have: a phone number. Yes, the analogue world is still with us, not least for marketing reasons. There are also potential security concerns, so it is still important to validate phone number. Why is phone number validation important? Because sending timely and relevant messages is the backbone of good customer interaction.

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What is a phone validator API?

A phone number validation tool will enable businesses to acquire a spectrum of data to validate phone numbers. This can include capabilities such as location detection, checking that such as detect their location, check that they’re still current, and detect phone carriers and line types.

Abstract API

Abstract's phone number validation and verification API will help businesses verify phone numbers and identify active phone numbers at speed with the capability to scale all the way up to use cases of 500 API calls per second. Verifying phone numbers becomes will become even easier later this year, when Abstract will release the bulk phone validation feature.

Features

A real time API that’s easily integrated, this phone number verification tool enables businesses to ensure that the phone numbers they add to their database are current and correct. Not only is this a great time saver, ensuring that you don’t spend time on anything except a valid number, it also enables you to confirm that the location of a contact actually matches their phone number, no matter whether it’s a cell or a landline.

Free quota

Abstract’s phone number validation allows 250 API requests at a rate of 1 per second. This will help you test the tool prior to implementation or support limited use cases.

Great for

A wide variety of use cases with the capability to do phone validation work in over 190 countries.

Pros

  • Location data can be accurate even to city level
  • Fast
  • Secure using 256-bit end encryption
  • Updated daily

Cons

  • The free quota isn’t suitable for all use cases
 A telephone, image courtesy of Pixabay

NumVerify

NumVerify is a phone number validator that makes it easy to ensure that you’re only keeping good leads and minimizing the risk of fraud by keeping your database clean.

Features

This phone validation tool supports international phone number validation.

Free quota

The free version supports 100 requests per month and is free forever, not a trial version.

Great for

With 232 countries supported, this is great for international use cases.

Pros

  • Great international coverage
  • Free version offers real time validation of carrier, line type, country, and location
  • Easy to implement

Cons

  • Free version is limited and is unencrypted

Global Telephone

Unfortunately, no information can be found on this phone validation API.

Features

Difficult to assess as a website for this couldn’t be found.

Great for

Unknown.

Pros

  • Impossible to say as no information could be found

Cons

  • The lack of information makes it an unknown quantity.

MoceanAPI

Mocean’s phone validator enables businesses to ensure that they’re only storing valid phone numbers.

Features

Phone numbers, such as a landline, can be assessed for their validity, detecting whether they’re current or not. This is, in part, a matter of compliance because the EU’s GDPR (General Data Protection Regulation) means that data which identifies individuals must be kept up to date.

Free quota

A free trial is available, but there doesn’t appear to be a true free version.

Great for

Getting phone number details including carrier and country.

Pros

  • Code examples in five programming languages
  • Supports compliance with national phone number formats

Cons

  • No true free version
  • Seems relatively limited compared to other products

Veriphone

Veriphone helps make it easy for businesses to detect whether a phone number is valid or not, no matter whether they’re a landline or a cell phone.

Features

Veriphone offers detailed information on numbers in all 248 countries. That makes is a great tool for global businesses where ensuring that international phone lists are kept up to date is critical.

Free quota

The free option allows a generous 1,000 requests per month. It’s not clear whether there are limitations on the free vversion.

Great for

It’s lead scoring functionality makes it a great choice for global marketing campaigns.

Pros

  • The free quota means that low volume, broad scale use cases can be supported
  • Monthly and pay as you go options with credits that never expire
  • Bulk phone number validation
  • Pre-built connectors to 2,000 applications
  • Validated phone numbers deleted automatically

Cons

  • Not many customer reviews
Digital marketing, image courtesy of Pixabay

Vonage Number Insight

This phone number verification tool enables businesses to establish the legitimacy of personal and business numbers.

Features

Phone number verification features include the capability to detect if a phone number was recently ported to a new carrier. It can also detect whether a phone is reachable while ensuring that, if it’s a cell phone, high roaming fees are avoided. This is all paired with real time analytics to support marketing campaigns. 

Free quota

Free credits are available, but details are only supplied upon contact.

Great for

A great tool for keeping a customer database free of wrong numbers, helping to ensure that text message marketing supports sales efforts.

Pros

  • Feature rich
  • IP matching of geolocation and other customer identity data
  • Sub-accounts to organize multiple services or applications
  • User permissions 

Cons

  • Pay per API call may prove more expensive in high use scenarios

Loqate

This phone validator API will help keep your database clean to ensure that you’re only storing active numbers to preserve business performance.

Features

No caching of queries takes place with this phone validator, ensuring that no phone number produces a false positive. The website also enables you to test a phone number.

Free quota

While there’s a free trial for 14 days with 50 lookups per day for a total of 700, there’s no truly free option for phone lookup.

Great for

Simple use cases where a broad set of features would go to waste.

Pros

  • Offers real time phone validation
  • Single tap geolocation
  • Simple range of payment plans

Cons

  • May not be suitable for complex use cases
  • Pay per phone validation
  • No true free version

BotDelive

While the BotDelive website could be found, no information on this tool for detecting invalid phone numbers could be found.

Features 

Unknown as no information could be sourced.

Great for

Since no information could be found, it’s very difficult to say.

Free quota

Unknown.

Pros

  • None given that no information could be found

Cons

  • No sign of a website or any information of any kind

Neutrino

Unfortunately, very little information is available for this tool for validating a phone number. What information is available on the website is limited to implementation of the API and understanding its responses.

Features 

This tool is capable of detecting invalid phone numbers. It can detect line type, country based on the number and carrier 

Free quota

Up to 10,000 API requests per day for free.

Great for

Minimal use cases or businesses already on the Neutrino platform. 

Pros

  • Can do the basics

Cons

  • Almost no information on the website
  • Appears feature limited
  • Pay per API call which could prove expensive

Byteplant

Byteplant’s phone validation can be integrated with a wide range of other tools.

Features

This API is capable of verifying numbers, cleaning lists to remove duplicated phone numbers, detecting line type, and providing location information.

Free quota 

This is a free trial, not a fully-fledged free version.

Great for

A global business managing international phone numbers that’s capable of supporting a wide variety of use cases. 

Pros

  • Capable enough to support a variety of use cases including a marketing database
  • Easy integrations through ZapierPlugins for WordPress
  • Credits never expire

Cons

  • Has good features for marketing, but without analytics

Why using a phone validator is important 

Validating phone numbers enables you to save time and money because you’re not going to be calling or texting invalid numbers. Nor are you going to be asking your marketing team to do phone number validation work.

Also, continually calling and messaging invalid numbers is a very bad look for a company. That can present real risks of brand damage which can be very difficult to recover.

Phone number validators can reduce fraud

A phone validator tool, paired with other customer data such as address, carrier and line type, will help minimize fraudulent sign-ups. Being able to integrate with your existing tools will also prove help increase the value of phone validation for businesses.

Companies can validate global phone numbers

In the e-commerce world, there’s no telling where a business’s next customer is coming from. They’re not going to want to leave a sale on the table, so it’s important to be capable of carrying out phone validation on a global scale.

Reduces costs on outbound SMS campaigns

Not only can validating phone numbers save you time and make global sales, it also reduces costs because businesses aren’t spending money on text messages to outdated phone numbers. The cost of one wrong number may be tiny, but multiply that by the number of customers and we can see how costs can scale.

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Validate phone numbers in seconds using Abstract's API.
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