Internet Telephony Software for Business

Get reliable Internet telephony software for your business that brings efficiency and flexibility to your interactions. Unlock sophisticated calling capabilities without the need for costly hardware upgrades and get the best of seamless cloud-based connectivity to manage a team across the globe or engage with clients.

Easily customizable as per your business needs

Wide reach with virtual numbers from 100+ countries

Unified Callbox for streamlined telephony

Easy integrations with popular business tools

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Internet Telephony Software for Business1 image

9000+ companies worldwide trust and cherish our service

How to set up an Internet Telephony?

To set up an Internet Telephony, create a KrispCall Account and select the country and phone number type. Make the payment, configure the settings and features, and you are set to use the internet telephony to make calls.

Create a KrispCall Account.

Select the country and choose your phone number type.

Select the phone number you need

Make payment and Submit your documents for verification (if necessary).

Start making and receiving calls through KrispCall.

Expand Your Office Worldwide with Virtual Office Phone Numbers

Easily handle incoming calls from customers and businesses to provide greater customer support at their preferred country number.

Popular Country

USA

UK

Australia

Canada

Germany

France

Philippines

South Africa

Singapore

Brazil

Netherlands

Africa

Algeria

Benin

Kenya

Mali

Mauritius

Namibia

South Africa

Tunisia

Uganda

Asia

Australia

Hong Kong

Indonesia

Israel

Thailand

Macao

Malaysia

New Zealand

Philippines

Singapore

Europe

Austria

Belgium

Bosnia and Herzegovina

Bulgaria

Croatia

Czech Republic

Denmark

Estonia

Finland

France

Germany

Hungary

Iceland

Ireland

Lithuania

Netherlands

Poland

Portugal

Romania

Slovakia

Slovenia

Sweden

Switzerland

UK

North America

Barbados

Canada

Cayman Islands

El Salvador

Grenada

Jamaica

Mexico

Panama

Puerto Rico

USA

South America

Argentina

Brazil

Chile

Colombia

Ecuador

Peru

Trinidad and Tobago

KrispCall Internet Telephony Features

Unlock awesome features in your custom local phone number to upgrade your business communication.

Internet Telephony with Your Favorite Tools Integration

Easily integrate internet telephony with your favorite tools with KrispCall. Streamline your telephony process with internet phone numbers integrated with popular applications.

Integrations

Sync with your existing CRM systems

Stay informed on all CRM telephony conversations, whether through calls, SMS, or voicemails, to seize every opportunity.

Find your CRM

Connect with the CRM applications you use. With KrispCall, you can integrate with over 100 applications seamlessly.

Proud to be Recognized as VoIP Leader & Regional Leader in ANZ, EMEA, Europe, and Asia Pacific by G2

+63 more recognitions

J C.

HR Officer

Jun 23, 2025

“I love how easy KrispCall is to use, and the helpful support makes it easy for me to manage multiple numbers and stay connected globally.”

Mike B.

Co-Founder and Business Dev...

Jun 04, 2025

“KrispCall won us over with lightning-fast support, effortless access to numbers and SMS, and pricing that makes sense for small businesses.”

Tkachenko E.

Software Developer

Apr 21, 2025

“KrispCall lets me manage all my calls, texts, and voicemails from one place, helping me stay organized and present a professional image wherever I work.”

Amanda C.

CEO

Jan 22, 2025

“KrispCall’s quick, respectful customer support helped me find the perfect solution for global calls and a customer service number!”

Nagendra V.

Digital Marketing Specialist

Oct 07, 2024

“KrispCall makes global calling effortless with all the tools I need in one place—perfect for connecting with clients worldwide & my digital marketing needs!”

James S.

Software Engineer

May 21, 2025

“KrispCall’s easy setup and intuitive interface keep my team’s communication organized, while its AI-powered platform has streamlined global calls and customer interactions.”

Taha Ryuko S.

Founder & CEO

May 29, 2025

“We received a prompt response right after reaching out, and KrispCall helped resolve my virtual identity issue.”

Colin L.

Server

Feb 11, 2025

“We use KrispCall for a Hong Kong number to receive OTPs—the service is reliable, support is excellent, and the daily usage emails keep us in the loop.”

Lucas W.

Product Manager

Dec 3, 2024

"KrispCall’s authentic, professional service and exceptional customer understanding make staying connected with clients effortless—I’m very happy with it!"

Pushkar Verma

Director

Aug 12, 2024

“The setup process was very easy, with chat support available during our business hours. We needed a UK number with WhatsApp setup, and this solution met our needs at a reasonable price.”

Turan B.

Researcher

Jun 05, 2025

“KrispCall helped me get a virtual number that makes international calling smooth and easy.”

Sandeep M.

Real Estate Specialist

Apr 22, 2025

“KrispCall helped me get a UK number and set up WhatsApp and Telegram effortlessly for my real estate client calls from Dubai.”

Teddy M.

Finance Professional - Busin...

Feb 04, 2025

“Super quick setup and amazing support, KrispCall made it easy for our customers to reach us!”

Hunter F.

Business Analyst

Nov 12, 2024

"KrispCall’s amazing VoIP features and seamless number porting have been essential for managing my international business calls and remote team—highly recommended!"

Matthew Jones (JP, AFIML)

Associate Fellow

Jul 18, 2024

“Been using KrispCall for a while now and the service is great and the customer support is so responsive”

What is Internet Telephony?

Voice over Internet Protocol (VoIP), usually called Internet telephony, is a technology that facilitates voice communication through the Internet. This communication system transforms analog audio streams into digital data packets sent across IP networks.

Internet telephony service providers, like Krispcall, eliminate the need for conventional phone lines or traditional phone systems by enabling users to make voice conversations, have video conferences, and send multimedia messages.

What are the advantages and disadvantages
of Internet Telephony?

Advantages

Flexibility and Mobility

Users of Internet Telephony can place calls with an Internet connection from any location with any internet-connected devices. Employees may stay connected and productive when working remotely thanks to this flexibility.

Scalability

Internet Telephony systems are highly scalable and easily adapt to changing business needs. There is no need to make costly infrastructure adjustments to add or remove phone lines or extensions.

Cost Saving

They have cheaper tariffs and communication fees, particularly for long-distance and international calls. By utilizing the Internet, businesses can benefit from low-cost calling rates and avoid the hefty costs associated with traditional phone lines.

Advanced Features

Internet Telephony systems come loaded with advanced features that improve collaboration and communication. These features include call forwarding, voicemail, call recording, call transcription, and virtual phone lines.

Integration

They can be integrated with other programs and equipment frequently used in corporate settings. Workflows are streamlined, and efficiency is increased through integration with other business tools and CRM apps.

Disadvantages

Dependency on Internet

High-speed Internet connectivity is necessary for Internet telephony. Voice communication may be completely lost if the internet service is interrupted or has outages.

Power Dependency

Traditional landlines can continue operating even during electric power failure. However, IP phones and routers used in Internet Telephony systems typically need power, so they will be dysfunctional when there is no electricity.

Call Quality and Reliability

Network congestion, bandwidth restrictions, and Internet connectivity issues can all impact the quality of Internet telephony calls. So, they are less reliable in terms of call quality compared to traditional phones.

Security and Privacy

Security issues like hacking, spying, and unauthorized access are possible with Internet telephony calls. So, these systems are quite vulnerable as compared to POTS.

Emergency Calls

Most of the internet telephony services do not support emergency calling (911 or other emergency numbers). So, in case of emergency, you would have to rely on traditional phones.

How does Internet Telephony Work?

Here is a step-by-step process on how Internet Telephony works.

Voice Conversion

First, the voice is recorded by an audio recorder and converted from analog to digital format when placing an Internet telephony call.

Packetization

Secondly, the destination address, speech data, and other relevant information are packed into compact packets from the digital voice data.

IP Network Transmission

After that, the IP network, a LAN within an organization or the general internet, transmits the data packets.

Routing

Next, the data packets transit the network, frequently using switches and routers to reach their destination. The routers decide the best way for the packets to travel to their destination.

Reassembly

Based on the packet headers data, the packets are reassembled correctly once they reach their destination.

Voice Conversion

Finally, the recipient can hear the voice because the received digital packets are transformed into analog audio signals at the receiving end.

How To Choose The Best Internet Telephony Software?

Look for essential features

Examine the features that various Internet telephony programs offer. Shortlist only the ones that have all the features you need and might need in the future.

Consider scalability

Examine the software's capacity for expansion. Check if it allows seamless upscaling and downscaling whenever you have to expand or contract your business.

Integration Capabilities

Make sure the platform supports integration with CRM apps and other business tools. Integration streamlines processes, increases productivity, and improves overall user experience.

Evaluate call quality and reliability

Verify the software's reputation for dependability and call quality. Always look for suppliers with a solid network and infrastructure to guarantee clear connections. Read evaluations and look for advice from reliable sources.

What is the best internet phone number for business?

A good virtual number can improve customer interactions and enhance a company’s professional image. The best internet phone number for business is typically a VoIP (virtual) number from a provider like KrispCall.

KrispCall offers advanced VoIP features such as call transcription, shared phone numbers, voicemail, and integrations with popular CRM and business tools, all of which enhance business communication and flexibility at affordable rates.

Mistakes to Avoid when Buying a Business Phone Number

There are many common mistakes that individuals and businesses make while buying a business phone number from various service providers. Here are some major mistakes to be considered when buying
a business phone number:

Inadequate research about usage

Neglecting customer support

Not considering scalability

Lack of security measures

Ignoring call quality

Not considering portability

Overlooking compatibility

Failing to understand contract terms

Proud to be Recognized as VoIP Leader & Regional Leader in ANZ, EMEA, Europe, and Asia Pacific by G2

+63 more recognitions

J C.

HR Officer

Jun 23, 2025

“I love how easy KrispCall is to use, and the helpful support makes it easy for me to manage multiple numbers and stay connected globally.”

Mike B.

Co-Founder and Business Dev...

Jun 04, 2025

“KrispCall won us over with lightning-fast support, effortless access to numbers and SMS, and pricing that makes sense for small businesses.”

Tkachenko E.

Software Developer

Apr 21, 2025

“KrispCall lets me manage all my calls, texts, and voicemails from one place, helping me stay organized and present a professional image wherever I work.”

Amanda C.

CEO

Jan 22, 2025

“KrispCall’s quick, respectful customer support helped me find the perfect solution for global calls and a customer service number!”

Nagendra V.

Digital Marketing Specialist

Oct 07, 2024

“KrispCall makes global calling effortless with all the tools I need in one place—perfect for connecting with clients worldwide & my digital marketing needs!”

James S.

Software Engineer

May 21, 2025

“KrispCall’s easy setup and intuitive interface keep my team’s communication organized, while its AI-powered platform has streamlined global calls and customer interactions.”

Taha Ryuko S.

Founder & CEO

May 29, 2025

“We received a prompt response right after reaching out, and KrispCall helped resolve my virtual identity issue.”

Colin L.

Server

Feb 11, 2025

“We use KrispCall for a Hong Kong number to receive OTPs—the service is reliable, support is excellent, and the daily usage emails keep us in the loop.”

Lucas W.

Product Manager

Dec 3, 2024

"KrispCall’s authentic, professional service and exceptional customer understanding make staying connected with clients effortless—I’m very happy with it!"

Pushkar Verma

Director

Aug 12, 2024

“The setup process was very easy, with chat support available during our business hours. We needed a UK number with WhatsApp setup, and this solution met our needs at a reasonable price.”

Turan B.

Researcher

Jun 05, 2025

“KrispCall helped me get a virtual number that makes international calling smooth and easy.”

Sandeep M.

Real Estate Specialist

Apr 22, 2025

“KrispCall helped me get a UK number and set up WhatsApp and Telegram effortlessly for my real estate client calls from Dubai.”

Teddy M.

Finance Professional - Busin...

Feb 04, 2025

“Super quick setup and amazing support, KrispCall made it easy for our customers to reach us!”

Hunter F.

Business Analyst

Nov 12, 2024

"KrispCall’s amazing VoIP features and seamless number porting have been essential for managing my international business calls and remote team—highly recommended!"

Matthew Jones (JP, AFIML)

Associate Fellow

Jul 18, 2024

“Been using KrispCall for a while now and the service is great and the customer support is so responsive”

KrispCall for Multiple Platforms

Stay connected no matter where you are. KrispCall is your constant companion, available on iOS, Android, as a WebApp, and Google Chrome Extension.

Frequently Asked Questions

Didn’t find the Answer you were looking for? Visit our Help Center or Contact Support

What is Internet Telephony software?

Internet telephony software is those softwares that facilitates voice communication over the Internet. The analog audio streams are transformed into digital data packets and sent across IP networks. The software replaces the need for conventional phone lines by enabling users to make voice conversations, hold video conferences, and send multimedia messages.

What is the purpose of Internet telephony?

The purpose of Internet telephony is to provide cheaper and more flexible communication to users while bypassing traditional phone networks. It is commonly used for making international calls, VoIP calls, and even integrating with other tools like CRM and help desks.

What is an example of Internet telephony software?

An example of Internet telephony software is KrispCall, which allows users to make voice calls and send & receive SMS & MMS messages over the Internet. It employs Voice over Internet Protocol (VoIP) technology to facilitate telephony between users on different devices, including computers and smartphones, making it a versatile tool for both personal and professional use.

What is Internet protocol telephony?

Voice over IP (VoIP), commonly called Internet protocol telephony, is a technology that enables voice communication over the Internet utilizing the Internet Protocol (IP). It involves the conversion of analog voice signals into digital packets that are transmitted over an IP network.

How does internet telephony work?

Internet telephony transforms analog voice signals into digital data packets and sends them via IP networks. The process involves voice conversion, packetization, transmission over IP networks, routing, reassembly, and voice conversion at the receiving end.

Internet telephony works by converting voice and other forms of communication into digital signals that are transmitted over the Internet rather than through traditional telephone lines. The process involves voice conversion, packetization, transmission over IP networks, routing, reassembly, and voice conversion at the receiving end.

What is the difference between Internet telephony and IP telephony?

Internet Telephony refers to transmitting voice and multimedia communication over the Internet using protocols such as Voice over Internet Protocol (VoIP). It relies on the public internet as the network infrastructure for transmitting voice data.

On the other hand, IP telephony relates especially to the transmission of voice communication through Internet Protocol (IP) networks. It includes local area networks (LANs) and wide area networks (WANs). Voice communication with IP telephony can occur across a vast area network or a private network, such as one connecting many offices.

What are the applications of Internet telephony?

Internet telephony has many applications like business communication, call centers, international calling, remote work, telecommunications, teleconferencing, webinars, and VoIP service providers.