Discover the unparalleled features provided by SIP Caller

You love your phone system but it lacks good capabilities for outbound calling campaigns? No worries, SIP Caller comes to the rescue! We connect to your phone system as a remote extension, so you can leverage your existing infrastructure. Outbound calls will be generated using your existing phone lines, so your customers will see your number as the caller.

In addition, there is no software to install, as we connect to your phone system from the cloud using standard SIP & RTP protocols over a secure TLS connection.

Make up to 256 simultaneous calls, and connect to different Phone Systems, to easily handle multi-branch companies.

We automatically detect whether a call has been answered by a human or an answering machine, using real time speech analysis, and trigger a different call flow for each case, for example transferring human-answered calls to your agents while leaving a message on voicemail.

Choose Standard Voicemail Detection, fast and free of AI cost, or AI-Based Voicemail Detection for maximum accuracy. AI-Based Voicemail Detection understands what is actually being said, separately identifying humans, voicemail, and company IVRs, and can even bypass automated call screeners.

Let AI conduct your outbound calls with natural, goal-driven conversations. Give your agent a persona, a purpose, and the context for each call, and it handles the conversation from greeting to outcome, no scripts to record, no flows to design.

Every call is personalized using your campaign data, and the contact can ask to be transferred to a human agent at any point, with the full conversation context passed along automatically.

Defining call flows has never been easier. We provide templates for the most common use cases, which you can use from a step by step wizard, so you can create them in minutes! No complex interfaces with hundreds of options that you don’t know how to fill. Just enter the text to play, or the extension number to which SIP Caller must transfer the calls. As simple as that!

Your call flow is not covered by the templates? No worries, we provide a visual designer, which lets you configure any call flow. You can start from scratch, or edit with the designer a call flow created from a template.

Once you have configured the link to your phone system and defined the call flows you want to use, creating a campaign becomes a walk in the park:

Play pre-recorded messages from WAV files, or generate them automatically using Text to Speech. We use Google Cloud Text to Speech to automatically generate the audio for your messages, using the voice of your choice.

Play a different message on each call, by using variable parts. For example, include a due balance, an expiration date, or any other customer related information.

Configure your prompts as plain text for simplicity, or use advanced SSML techniques to allow for more customization in the generated audio, by providing details on pauses, and audio formatting for acronyms, dates, times, abbreviations, or text that should be censored.

Interact with your customers automatically, and let them select menu options, or provide any feedback using DTMF keys. The information entered by the user will be included in the call detailed report, so you can inject this information into your CRM.

Transfer the call to your agents at the point of the call flow you decide. For example, let users select an option to be transferred to your sales team, so you only send them calls connected to users who are willing to buy your product.

Check your campaign progress in real time. Our dashboard will tell you the number of successful, failed, and pending calls, among other very useful metrics.

Obtain a call by call detailed report, including the date and time, the call result (answered, busy, no answer, error), the user input (when any), and the SIP status code and description.

Get insightful performance graphics for a better understanding of your campaign progress.

Never miss what’s happening with SIP Caller. Get immediate email notificationss for the topics you need, including:

A single user is not enough when your organization grows. You need different users, with different permissions, so each member can handle exactly what they need!

With SIP Caller you can create as many users as you need, all included in your plan! And you can also use Tags to restrict some campaigns to specific users. For example, you could have campaigns from 2 different departments in your company, with different employees handling them.

The following roles are available:

The SIP Caller REST API lets you integrate your existing platforms — CRM, ERP, database, or any custom application — directly into your calling workflows. The most powerful use case is dynamic number injection: your system queries the contacts it needs to call and pushes them into a live campaign via API, keeping every campaign in sync with your data source in real time.

The API uses standard HTTP and JSON, making it straightforward to integrate from any programming language or environment. Full documentation is available in the API documentation section.

While the REST API lets you push data into SIP Caller, webhooks do the opposite: SIP Caller automatically pushes call result data out to your systems the moment an event occurs. No polling required — your CRM, billing platform, or workflow engine is notified the instant a call finishes.

Configure a webhook URL in SIP Caller and choose which events to subscribe to. For each event, SIP Caller sends an HTTP POST with a structured JSON payload. Failed deliveries are automatically retried with exponential back-off, and a full delivery log is available in the console so you can inspect and replay any failed notification.