UI/UX | Front End | Back End | Database
Seamless Agile Delivery & Deployment
Design & Develop Customized SaaS Application
Real-time Access to Vehicles
Build custom apps for Android
Develop your own white-label iOS apps
Self-hosted solution for mobile & web apps
Fully customizable chat & call features
Blog » Communication » 10 Best VoIP Call APIs & SIP Call Software in 2025 Reviews
Are you wondering What, Which, and How about SIP calling APIs? You’ve landed right!
Alright, the purpose of SIP calling in 2025 is sky-high. Small businesses or startups that switch to SIP calling reduce the cost of their local calls by 40% and 90% on international calls.
In the upcoming years, while technological advancement and customer expectations over brands increase, the need for a sound communication system will eventually peak. Well, it’s already.
The answer to the How is definitely SIP calling for its flexible, affordable and scalable solutions.
But Which is a daunting task for many individuals and enterprises. No more! In this blog, we’ve covered a detailed review of the top 10 SIP calling APIs in the industry to build your voice and chat system.
Table of Contents
Session Initiation Protocol (SIP) allows users to communicate with others by sharing voice, video, messages, and files over the Internet.
SIP calling API lets developers integrate the SIP functionalities into their existing systems using pre-built functions and SDKs (software development kits).
When choosing the best SIP calling API provider, apart from the provider you must have several criteria to guide the selection process.
Compatibility & Integration: Keep in mind that the API should align with your existing infrastructure. Ensuring compatibility and integration is paramount.
The 10 best SIP & VoIP API providers are 1.MirrorFly, 2.Twilio, 3.Nextiva, 4.Vonage, 5.Apphitect, 6.Sendbird, 7.Plivo, 8.VideoSDK, 9.Sinch, and 10.Quickblox.
MirrorFly is a leading provider of white label voice API that covers SIP and VoIP call functionalities. This platform is scalable with a global infrastructure that supports 1 billion concurrent conversations.
Without any limitations, users can make real-time voice calls, instant messaging, and WebRTC-based video conferencing on any platform across devices.
Also, MirrorFly supports fast integration and custom security protocols with end-to-end encryption. The ultra low latency communication supports 99.999% uptime SLA.
MirrorFly’s Audio Call Features
Pros of MirrorFly
Cons of MirrorFly
MirrorFly’s VoIP & SIP Offerings
Twilio is a programmable voice API that aims to improve both internal and customer-business communication. Twilio supports personalized interactions through text messages and phone calls across any channel.
With REST API, developers can easily integrate voice chat functionalities for regular phone calls, however, accompanied by certain limitations.
Twilio’s SIP Audio Call Features
Pros of Twilio
Cons of Twilio
Nextiva offers one of the most reliable SIP VoIP APIs for seamless voice call connection. With the guided support and migration process, enterprises can build smart and scalable SIP voice call solutions across a variety of devices.
The robust set of Nextiva’s API enables it to build one-on-one and group VoIP calls that connect globally on the WebRTC platform.
Nextiva Voice Call Features
Pros of Nextiva
Cons of Nextiva
Vonage voice call API is not just about making phone calls; you can lead the customer-business conversation and deliver a better experience. With Vonage, WebRTC, and PSTN can be personalized based on the user context and business requirements.
With multiple use cases, Vonage API can be employed for healthcare, education, retail, finance, logistics, and travel for SIP calls.
Vonage Voice Call Features
Pros of Vonage
Cons of Vonage
Apphitect is a leading SIP voice-calling solution with self-hosted APIs and SDKs for Android and iOS. Apphitect is built with real-time voice and chat functionalities with high end customization. Based on enterprise needs, users can personalize each feature and branding by adding a logo, brand color, and fonts.
Apphitect allows 100+ third-party integrations and its API is flexible to scale up with multi-faceted features. Apphitect voice APIs offer custom security and compliance with industry standards.
Apphitect SIP Calling Features
Pros of Apphitect
Cons of Apphitect
Sendbird voice communication API offers high-quality SIP audio calls with well-managed infrastructure for a high scale of conversations. This platform allows personal and private group calls with a highly secured layer.
With highly reliable chat platform infrastructure delivering scalable and immersive calling experience. Still, the pricing structure may not fit for small businesses or startups. Ensuring a detailed pricing analysis before choosing Sendbird is recommended.
Sendbird’s Key Features
Pros of Sendbird
Cons of Sendbird
Plivo is a comprehensive chat and voice integration solution provider with a wide range of carrier network connections. As a global SIP provider, Plivo delivers seamless connectivity across 195 countries through the direct connection of over 1600 local carrier networks.
With extreme chat and voice features, Plivo allows enterprises and developers to build their communication apps through SIP SDKs and APIs.
Plivo Native SIP SDK Features
Pros of Plivo
Cons of Plivo
VideoSDK is an extraordinary voice call integration solution with versatile API and SDK for both mobile and desktop. With ready-to-integrate SIP functionalities and pre-built UI kits enabling audio calls in an existing system is now more accessible for developers and businesses.
A highlighted feature of VideoSDK is its cross-platform compatibility and voice call features that support all use cases. It supports a wide array of programming languages and frameworks like JavaScript, ReactJS, React Native, Android, and Flutter.
Key Features of Video SDK
Pros of VideoSDK
Cons of VideoSDK
Sinch is one of the leading real-time SIP and VoIP service providers with the best voice call functionalities across Android, iOS, and the web. Along with SIP calling, Sinch supports SMS, instant messaging, group calling, and video conferencing via standard communication APIs.
Although there are some issues associated with call drops, audio quality has been reported. Analyze Sinch voice call API to evaluate whether it will suit your specific requirements.
Sinch SIP API Features
Pros of Sinch
Cons of Sinch
Quickblox is a leading and feature-rich SIP calling provider with powerful APIs and a toolkit for complete voice call solutions. With the ready-to-go module, developers, and enterprises can choose Quickblox to hit the market without any complex steps quickly.
These SDKs are supported by WebRTC-based connection for seamless peer-to-peer connectivity with encryption.
Key Features of Quickblox VoIP API
Pros of Quickblox
Cons of Quickblox
Every SIP calling provider, SDK has its pros and cons. When it comes to choosing the best one, it’s wholly based on your specific requirements and needs.
As a pro tip: it’s always recommended to choose the white-label solution to have complete access to the features, branding, customization, and source code. These factors in your SIP provider will support both your ongoing requirements as well as upcoming high scalable options.
From our list to narrow down the options, we recommend MirrorFly, Apphitect, and Twilio for their extended customization and self-hosted solutions.
Contact the provider to get more detailed information for quick integration!
Good luck with finding the best VoIP calling Software!
Get 1000+ SIP & VoIP Call features to help you build the secure voice calling apps.
Related Articles
Session Initiation Protocol (SIP) is a signaling protocol responsible for initiating and connecting user sessions over the Internet. SIP API is a communication tool that helps developers to integrate and enable SIP networks into existing applications.
SIP calling is an internet protocol that transmits voice calls over the SIP trunk to create user sessions. SIP calls are often interchanged with VoIP calls to move analog call traffic over an internet connection.
API or Application Programming Interface is a set of predefined protocols for building and integrating applications. For example, Chat API is used to integrate into existing applications to enable messaging and voice call functionalities.
The best SIP SDK is MirrorFly because of its flexible API and SDK solution that supports unlimited customization and scalability for small businesses to large enterprises. Followed by MirrorFly, Apphitect is best for organizations that need flexible hosting and interactive features.
The thing that you should look for to choose the best SIP calling API are
Alexander
View More Posts
This guy is a blogging freak. He craves to blend the finest words to deliver meaningful, informative content in the most engaging way. This dude loves to craft content on tech blogs with a thorough piece of information. When he’s not writing, researching, or editing, you can catch him riding into unknown terrains and scribbling quotes.
This blog provides a great comparison of the best SIP call APIs for 2025! MirrorFly’s white-label solution for unlimited calls looks perfect for VOIP API integration. I’m also curious—how do businesses choose between a cloud-based platform like Plivo and a self-hosted one like ApphiTect?
Hi, I’m new to SIP calling, but I’m very interested in learning more about it. Could you please explain what SIP means in the context of calling?
Could you explain dow does a SIP calling API improve call quality and reliability?
This blog is fantastic! I’m looking forward to learning more from your posts. Are SIP calling APIs suitable for small businesses with limited technical expertise?
This post is highly informative! Thank you for sharing such valuable content. I’d like to know What are the key features of using a SIP calling API over traditional phone systems?
Your email address will not be published. Required fields are marked *
Comment *
Name *
Email *
Website
