Slybroadcast

Spec sheet

What it does

Slybroadcast deposits prerecorded messages directly into recipients' voicemail boxes without a normal ringing call.Read 15 Oct 2026 · slybroadcast.com

Product

Slybroadcast sends ringless voicemail messages directly to recipients’ voicemail systems.Read 30 Sep 2026 · slybroadcast.com

API

API access is included free with each account; API submissions use POST and can report call status through an optional webhook URL.Read 30 Sep 2026 · slybroadcast.com

Integrations

Official pages list Zapier, Make, Salesforce and Integrately integrations for trigger-based campaign automation.Read 15 Oct 2026 · slybroadcast.com

Security

The company states that it is SOC 2 and PCI compliant.Read 30 Sep 2026 · slybroadcast.com

Privacy

The privacy policy says customer contact lists are not sold or marketed and voice data may be retained for up to three years after the user’s last interaction.Read 30 Sep 2026 · slybroadcast.com

Support

Slybroadcast lists phone and email support and provides [email protected] and a contact form.Read 30 Sep 2026 · slybroadcast.com

Headquarters

Boston, Massachusetts, United StatesRead 28 Sep 2026 · slybroadcast.com

AI personalization

Voicemail Personalization can insert a recipient's first name using the sender's voice or text-to-speech.Read 15 Oct 2026 · slybroadcast.com

Analytics

Campaign delivery reports track outreach, and Callback Numbers enable callback reporting and call forwarding.Read 30 Sep 2026 · slybroadcast.com

API availability

API access is included with every Slybroadcast account according to the product page.Read 15 Oct 2026 · slybroadcast.com

API hosting requirement

The API documentation requires a hosting provider with server scripting or CGI support such as ASP, PHP, Perl or JSP.Read 15 Oct 2026 · slybroadcast.com

API limit

The API documentation sets a maximum of 10,000 destination phone numbers per submission.Read 30 Sep 2026 · slybroadcast.com

API status callbacks

Developers can receive call status updates through a webhook.Read 15 Oct 2026 · slybroadcast.com

API transport

The documented API accepts HTTP POST form submissions to a MobileSphere gateway endpoint.Read 15 Oct 2026 · slybroadcast.com

Callback and texting

Callback reporting and automated follow-up texts are available with a purchased Callback Number.Read 30 Sep 2026 · slybroadcast.com

Callback numbers

A callback number can forward return calls to any chosen number and supports callback analytics.Read 15 Oct 2026 · slybroadcast.com

Caller ID

Campaigns can display a caller ID number selected by the sender.Read 15 Oct 2026 · slybroadcast.com

Campaigns

Users can record by phone or upload audio, choose uploaded contact lists, and send immediately, in batches, or on a schedule.Read 30 Sep 2026 · slybroadcast.com

Company facts

LinkedIn lists Slybroadcast as privately held, founded in 2015, headquartered in Boston and employing 11–50 people.Read 15 Oct 2026 · linkedin.com

Company identity

Slybroadcast is identified as a service of MobileSphere LLC.Read 15 Oct 2026 · slybroadcast.com

Contact lists

Campaigns can use uploaded contact lists that are managed inside the account.Read 15 Oct 2026 · slybroadcast.com

Coverage

The service says it reaches mobile and landline phones in the United States and Canada.Read 30 Sep 2026 · slybroadcast.com

Data protection

The privacy policy says contact data is stored securely and encrypted, and that customer lists are not sold or marketed.Read 15 Oct 2026 · slybroadcast.com

Delivery reporting

The dashboard provides real-time delivery reports, while callback reporting requires purchasing a callback number.Read 15 Oct 2026 · slybroadcast.com

Developer documentation

Documentation includes HTML and JSON references, a Postman collection link, example requests and transaction fields.Read 15 Oct 2026 · slybroadcast.com

Follow-up texting

A purchased callback number enables an automated text to be sent after voicemail delivery.Read 15 Oct 2026 · slybroadcast.com

Founder

Crunchbase identifies Toufic Mobarak as MobileSphere's founder, president and chief technology officer.Read 15 Oct 2026 · crunchbase.com

Geographic reach

The service says it reaches mobile phones and compatible landlines in the United States and Canada.Read 15 Oct 2026 · slybroadcast.com

Limit: account access

Trustpilot and Google Play reviewers report verification, account-lockout or account-closure problems and difficulty obtaining support.Read 15 Oct 2026 · trustpilot.com

Limit: Android usability

A Google Play reviewer reports that the mobile interface is obstructed by the phone navigation controls and is unusable.Read 15 Oct 2026 · play.google.com

Limit: delivery behavior

Trustpilot reviewers report that some scheduled calls failed or rang recipients instead of remaining ringless.Read 15 Oct 2026 · trustpilot.com

Limit: mobile app parity

An Apple reviewer reports that the app cannot manually enter numbers or change the callback number like the desktop version.Read 15 Oct 2026 · apps.apple.com

Message recording

Users can dial in to record, record from a phone, or upload an audio file.Read 15 Oct 2026 · slybroadcast.com

Mobile account requirement

The iOS and Android apps require an existing Slybroadcast account.Read 15 Oct 2026 · apps.apple.com

Mobile app

The site describes a mobile app for sending campaigns, recording messages, and checking broadcast status while away from a computer.Read 30 Sep 2026 · slybroadcast.com

Notable launch

A December 15, 2017 press release announced Slybroadcast iOS and Android apps and said the service was used by more than 20,000 businesses at that time.Read 15 Oct 2026 · prnewswire.com

Parent company facts

MobileSphere's about page says it is headquartered in Cambridge, Massachusetts, was founded in 2015 and has more than 3 million Slybroadcast users worldwide.Read 15 Oct 2026 · www2.mobile-sphere.com

Personalization

Voicemail Personalization uses AI and the user’s voice to include a recipient’s first name, with text-to-speech and voice selection options.Read 30 Sep 2026 · slybroadcast.com

Praise: campaign speed

Trustpilot reviewers say contact uploads are simple and voicemail delivery with status reports can occur within minutes.Read 15 Oct 2026 · trustpilot.com

Praise: ease of use

G2's reviewer described the product as extremely easy to use, easy to navigate and simple to implement.Read 15 Oct 2026 · g2.com

Praise: support

Trustpilot reviewers repeatedly praise quick, responsive customer service and fast issue resolution.Read 15 Oct 2026 · trustpilot.com

Proprietary status

Terms identify Slybroadcast as a proprietary MobileSphere service and trademark, with no open-source licence stated.Read 15 Oct 2026 · slybroadcast.com

Rating on Apple App Store

4.7 out of 5 from 1.1K ratingsRead 15 Oct 2026 · apps.apple.com

Rating on Capterra

0.0 out of 5 from 0 reviewsRead 15 Oct 2026 · capterra.com

Rating on G2

5.0 out of 5 from 1 reviewRead 15 Oct 2026 · g2.com

Rating on Google Play

4.0 out of 5 from 73 reviewsRead 15 Oct 2026 · play.google.com

Rating on Trustpilot

3.9 out of 5 from 46 reviewsRead 15 Oct 2026 · trustpilot.com

Refund

The company says it will refund a customer who is not satisfied with their first voicemail marketing campaign.Read 30 Sep 2026 · slybroadcast.com

Scheduling

Voicemails can be sent immediately, in batches, or at scheduled dates and times.Read 15 Oct 2026 · slybroadcast.com

Security claims

Slybroadcast states that its solution is HIPAA compliant and that its transactions are SOC 2 and PCI compliant.Read 15 Oct 2026 · slybroadcast.com

Software Advice listing

Software Advice shows two usage-based plans starting at $8 per month and says the product has no reviews yet.Read 15 Oct 2026 · softwareadvice.com

Support resources

The help center offers video tutorials, downloadable setup guides, integration guidance and FAQs.Read 15 Oct 2026 · slybroadcast.com

Plans and prices

Every Slybroadcast plan and price →

Where Specifiction places it

• Voicemail Drop Software#17 of 438.1