- Build VoIP stacks — Combine SIP, signaling, media, and native API parts inside a custom communications system.
- Support SIP and RTSP — Link an application to one or several VoIP providers through the available signaling protocols.
- Carry multichannel audio — Run separate audio routes when a device needs multiple channels.
- Protect media traffic — Encrypt RTP streams through SRTP and the available key-exchange methods.
- Cross firewalls — Route sessions through NAT, firewall, STUN, ICE, and TURN modules when direct connections fail.
- Choose voice codecs — Match the system to standard vocoders such as G.722, MELP, Opus, or Speex.
- Improve speech quality — Reduce echo, background noise, room reverberation, and timing jitter in voice traffic.
- Tune service quality — Set call progress tones and quality-of-service behavior for each deployment.
- Run on embedded hardware — Deploy processor-optimized code across DSPs, ARM chips, and other supported hardware.
VOCAL VoIP Software
Licensable VoIP modules for custom devices, gateways, and server systems
Updated August 23, 2026
VOCAL VoIP Software Overview
VOCAL Technologies licenses VoIP software to teams building their own communications products. The modules handle call signaling, media transport, and speech processing. Developers combine only the components their system needs.
Equipment makers and network operators use VOCAL across device and server projects. Each buyer assembles and hosts the final product. VOCAL is development software for tailored voice systems, not a finished cloud phone service for everyday business calling.
Key Features
Pricing
| Plan | Price | Key Features |
|---|---|---|
| Contact sales | Selected VoIP components and engineering work. |
No free trial is currently listed
Pricing source: VOCAL Technologies
Pros
| Competitor | Pros |
|---|---|
| PJSIP | VOCAL covers more than PJSIP’s core SIP library by pairing signaling with codecs, speech processing, fax, security, gateway modules, and optional engineering help. Equipment makers with unusual hardware can source more of the communications stack from one vendor instead of assembling every specialist component around PJSIP. |
| Liblinphone SDK | VOCAL spans more of the product than Liblinphone SDK, including embedded, network, server, codec, and gateway components alongside client code. A device maker building beyond a SIP app can keep more low-level communications work with one supplier and ask VOCAL for engineering help around specialized hardware. |
| PortSIP VoIP SDK | VOCAL gives equipment makers more control than PortSIP VoIP SDK over the lower layers of a product, from telephony and media to speech and network modules. Teams targeting chosen hardware can combine those parts around the device instead of accepting the packaged client approach that PortSIP uses. |
| Ozeki VoIP SDK | VOCAL works beyond the Windows-focused scope of Ozeki VoIP SDK, reaching embedded processors, gateways, radios, and servers. Manufacturers with unusual hardware can license low-level modules and request engineering work from VOCAL, while Ozeki is aimed more narrowly at .NET softphones, PBX features, webphones, and call applications. |
Cons
| Competitor | Cons |
|---|---|
| PJSIP | Unlike PJSIP, VOCAL posts neither module prices nor an equivalent source download. Developers must discuss licensing before they can compare costs or run the same kind of hands-on evaluation. PJSIP gives budget-sensitive teams a documented starting point across desktop, mobile, and embedded systems without that sales step. |
| Liblinphone SDK | Liblinphone SDK provides public source code, documentation, builds, and platform details, while VOCAL routes buyers through a module catalogue and sales process. Teams that need only SIP client code can test Liblinphone SDK before committing, giving them a faster technical evaluation than VOCAL offers. |
| PortSIP VoIP SDK | PortSIP VoIP SDK packages a defined client API with sample projects across desktop, mobile, and web. By contrast, VOCAL makes buyers select among many communications modules, which adds design work when the goal is simply to place voice, video, messaging, or conferencing inside an application. |
| Ozeki VoIP SDK | Ozeki VoIP SDK offers .NET tutorials, code examples, and starter material for softphone, call-routing, recording, and PBX projects. VOCAL documents capabilities without a similarly direct route into development, so Windows teams can test Ozeki concepts before they discuss commercial terms or custom engineering with VOCAL. |
Reviews
- Capterra — Rated 4.5/5 from 2 reviews. One reviewer liked the available conversation channels, audio recording, and call statistics.
- Findstack — Rated 4.8/5 from 2 reviews. Reviewers praised extension dialing, call transfers, voice quality, interoperability, WebRTC support, and scale. Complaints covered screen sharing, large-file transfers on weak connections, and customer support.
