Compare VaxVoIP SIP Phone SDK vs. Zoiper in 2026

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Description

The VaxVoIP SIP Phone SDK enables developers to create customized SIP softphones and VoIP applications compatible with platforms such as Windows, Android, iPhone, and iPad. This powerful SDK encompasses SIP signaling, media management, and call-control APIs that support both voice and video functionalities, messaging, presence features, multiple SIP account integrations, and the ability to handle concurrent calls. Noteworthy features include conference calling, call hold, transfer and forwarding options, WAV recording capabilities, SIPREC client support, echo cancellation, jitter buffering, and detection of answering machines. The SDK also offers sample projects in a variety of programming languages, including C#, VB.NET, WPF, Visual C++, Delphi, Java, Objective-C, and Swift, along with comprehensive documentation tailored to each platform. It seamlessly connects applications with standard SIP servers, IP-PBX systems, gateways, and various telephony service providers. Potential applications for this SDK range from softphones and mobile VoIP solutions to call-center applications, auto-dialers, and integrated business communication systems. Developers can explore a fully functional 30-day trial version, while annual licenses for Windows, Android, and iOS are available for purchase separately, ensuring flexibility for different development needs. Overall, the VaxVoIP SIP Phone SDK provides robust tools and resources designed to streamline the development of high-quality VoIP applications.

Description

Protect your communications by ensuring your VoIP calls are encrypted and safe from eavesdropping. If you value your privacy during conversations, you’ll appreciate our complimentary encryption services for all types of communications, including text, voice, and video, utilizing TLS/SRTP and ZRTP protocols. Our VoIP softphone seamlessly integrates with your contacts, providing a consolidated list for quick access from various sources such as Outlook, Windows, Mac, LDAP, XMPP, XCAP, as well as mobile platforms like Android and iOS. You can also easily identify incoming calls before answering, enhancing your communication experience. Zoiper is compatible with a wide array of operating systems, whether you are on macOS, Linux, or Windows, and also supports iOS, Android, and web browsers. We strive to continuously improve our offerings and expand our compatibility. Forget the complex jargon; our solution encompasses Audio, Video, Fax, Presence, and Instant Messaging, all accessible through a user-friendly interface designed for your convenience. With Zoiper, you can communicate confidently and efficiently across multiple platforms.

API Access

Has API Yes

API Access

Has API No

Screenshots View All

Diagram with a central “VaxVoIP SIP PHONE SDK” panel connected in a circle to Windows, Visual Studio, C#, C++, Apple, Android, Swift, and D icons over a dotted world map.

Screenshots View All

Integrations

Asterisk Yes

CALLEY No

FlyNumber No

Freshdesk No

LDAP No

My Call Cloud No

Nimble No

Telnyx No

VoiceSpin No

Explore All 1 Integration

Integrations

Asterisk No

CALLEY Yes

FlyNumber Yes

Freshdesk Yes

LDAP Yes

My Call Cloud Yes

Nimble Yes

Telnyx Yes

VoiceSpin Yes

Explore All 8 Integrations

Pricing Details

$2,640/year

Annual single-software licenses: Windows $2,640, Android $2,840, and iOS $2,860. Licenses include technical assistance, updates, new releases, maintenance, and issue resolution.

Free Trial Yes

Free Version No