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SMS Alerting Reinvented

An affordable and simple-to-use mass alerting tool for rapid mobile messaging, automated data management and GDPR compliance by default.

Ideal for anything from emergency alerting to daily information updates.

The Alertline Approach to SMS Communications

We've combined our powerful and intuitive technology with a streamlined and data light approach to alerting.

Letting you send the alert communications you need with less of the effort. This is achieved by:

  • Simplifying alert subscription - your audience can opt-in via a QR code in less than 5 seconds and can opt-out at any time. Giving control over the communications they receive and removing your need to build and maintain subscriber lists.
  • Automating list management - set an automated schedule to erase subscriber lists. Removing your need to manually delete data and enusring your audience don't receive irrelevant alerts.
  • GDPR compliance by default - only a mobile number is required for alert sign up. Meaning you don't have to worry about GDPR as no personally identifiable information is collected.
  • Rapid communication - SMS communications can be written and sent in seconds. So you can vital information at speed when it matters most.
  • Focusing on alert visibility - SMS messaging has a 98% delivery rate, 97% open rate and is typically read inside 3 minutes. Ensuring your alert reaches and is seen by your audience in a timely manner.
  • Complete sender control - powerful and easy-to-use identity management ensures only the right people can access and send alerts.
  • Providing insight to alert performance - gain access to statistics and activity audits to unlock insights and improve the success of future alerts.

Key Features


Maximise your alert visibility

SMS has a 98% open rate, and cuts through social media clutter ensuring communications are read.


Fast & friction free user registration

Users register by QR code, no Apps or forms. Mobile numbers are immediately registered and users can unsubscribe.


Visitor and temporary alerting

Automatically purge and reset lists on a fixed date & time, or a regular schedule, daily, weekly or monthly.


Secure Web console for easy sending

Send SMS alerts that arrive within seconds and have a near 100% deliverability rate.


GDPR taken care of: Data simplified

Users can remove themselves at any time. Personal identifiable data is not retained.


Cost control made simple

See the cost of SMS blasts ahead of sending, so you can easily stay within your budget.

Industry Specific Use Cases


Shopping Centres &
Retail Parks

  • Security control centres can send alerts to retailers or shoppers such as, be alert, lockdown or evacuate.
  • Issue return instructions when it is safe
  • Encourage sign-ups with retailer's daily offers
  • Let visitors know about upcoming events

Multi-Tennant Buildings &
Office Blocks

  • Alert building tenants in the event of an evacuation
  • Manage re-occupation without overcrowding
  • Update tenants on planned works and disruption
  • Share news and updates about the building or the immediate vicinity


Business Improvement

  • Update members on local disruptions like roadworks, demonstrations or street events
  • Send out security alerts for criminal incidents
  • Keep members up-to-date on BID events

University & College

  • Create Alertlines by buildings and halls
  • Instantly alert students and staff to incidents on campus
  • Purge data at the end of the academic year

Plans & Pricing

Alertline offers a simple subscription-based model with transparent pricing. Making it easy to control your alert communication costs.


From £60/month/line

What's included:

  • Automated subscriber list management
  • Scalable SMS alerting tool
  • GDPR compliant
  • Subscription QR code and/or standard poster
  • Local dial number for non smartphone users
  • SMS sender ID for trusted comms
  • Secure web console to manage messaging
  • Ability to add and remove managers
  • Unlimited seats/managers

Book Your Demo Today

Trusted By

International law firm Travers Smith deploy the Sentinel platform as a crisis management solution.

Buro Happold use Sentinel Hotline to deliver crisis updates across 24 locations to 1900 employees.

Victoria BID deploys the Sentinel in emergency situations for mass alerting & crisis management.

Ross-On-Wye Council use Sentinel Hotline to connect vulnerable residents in need of assistance.

Our Awards and Accreditations



Learn or book a demo to find out more about Alertline