Compare the Top International Calling Apps that integrate with Opera as of October 2026

This a list of International Calling apps that integrate with Opera. Use the filters on the left to add additional filters for products that have integrations with Opera. View the products that work with Opera in the table below.

What are International Calling Apps for Opera?

International calling apps enable users to make international calls using an app on their smartphone or computer. International calling apps typically offer free calls to other app users or low-cost international calling around the world to regular phone lines. Compare and read user reviews of the best International Calling apps for Opera currently available using the table below. This list is updated regularly.

  • 1
    WhatsApp
    Simple. Secure. Reliable messaging. With WhatsApp, you'll get fast, simple, secure messaging and calling for free*, available on phones all over the world. WhatsApp Business is a free to download app that built with the small business owner in mind. Create a catalog to showcase your products and services. Connect with your customers easily by using tools to automate, sort and quickly respond to messages. WhatsApp can also help medium and large businesses provide customer support and deliver important notifications to customers. Learn more about WhatsApp Business API. Some of your most personal moments are shared on WhatsApp, which is why we built end-to-end encryption into the latest versions of our app. When end-to-end encrypted, your messages and calls are secured so only you and the person you're communicating with can read or listen to them, and nobody in between, not even WhatsApp.
  • 2
    Facebook Messenger
    Turn conversation into customer loyalty with Messenger. Messenger helps you simplify customer acquisition by providing a direct, conversational way for people to take action where they already spend their time. Building a presence on Messenger allows people to browse your products and services, and purchase them directly in the conversation. Building an experience on Messenger can help get your business, product or service in front of more people. Whether you’re launching a new product or driving awareness, conversation creates a meaningful connection with your business. Integrating Messenger into a customer service strategy allows customers to communicate with your business on their terms. No more waiting on hold or keeping website windows open. And the conversation stays in Messenger, an easily accessible spot for questions and re-engagement.
  • 3
    PopTox

    PopTox

    PopTox

    PopTox lets you make free VoIP calls from your PC or smartphone using WiFi or internet only. You can use PopTox from any standard web browser. No need to download apps or plug-ins. Absolutely no payment is required. Simply enter the phone number and click on the “Call” button to start your first free call. Make entirely free calls using our web based free calling app! You can now make free online calls right from your web browser. With PopTox, there is no need to download any app or plug-in. You can now call via internet as long as you have a modern web browser such as Chrome. Once you are on PopTox home page, you will see a dialpad. Select the country from the drop down that you want to call and enter the destination phone number. You will not be required to enter the country code. Just select the destination country from the drop down and enter the phone number without the country code.
    Starting Price: $10 per month
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