SMS Campaign Builder

SMS campaigns that reach people, not spam folders

Create short, personalised SMS campaigns for offers, reminders, follow-ups and announcements - with built-in UK GDPR compliance checking, character counting and a send-cost calculator so there are no surprises.

Direct
Lands on their phone, not in spam
PECR
UK-compliant opt-out built in
160
Characters per SMS credit

Most SMS campaigns break the rules - or break the budget

UK businesses that run SMS campaigns without understanding PECR and GDPR risk ICO fines. And those that don't track character counts end up paying for 2-credit messages when they only needed 1.

ClientRoots's SMS Builder checks compliance as you type, shows your credit cost in real time, and generates personalisation tokens automatically - so your campaign is compliant, cost-efficient and effective before you send a single message.

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Your Business
SMS
Hi {{FirstName}} 👋 Flash sale - 20% off all orders this weekend only. Use code FLASH20 at checkout: yourbusiness.co.uk/shop Reply STOP to opt out.
Delivered · 1 credit · 152 chars · GDPR ✓
Characters
152
Credits
1
GDPR
✓ OK

SMS done right - for UK businesses

Every feature is designed to help UK businesses run compliant, effective SMS campaigns without needing a specialist.

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Live Character Counter

Watch the character count and credit cost update in real time as you type. The counter highlights when you're approaching the 160-character limit and shows when a second credit will be charged.

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UK GDPR / PECR Compliance

Automatically flags missing opt-out language, identifies restricted content and confirms whether your message meets ICO SMS marketing guidelines before you finalise it.

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Cost Calculator

Enter your recipient count and see the estimated Twilio or Textlink cost before you commit. Know exactly what 500 or 5,000 messages will cost - no bill shock. Starter+

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Personalisation Tags

Insert {{FirstName}}, {{BusinessName}} and {{ProductName}} tokens for personalised messages at scale. Starter+

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Campaign Calendar

Plan your SMS campaigns across a visual monthly calendar. Schedule flash sales, follow-up reminders and seasonal promotions without losing track of what's going out when. Business+

UK Send Time Optimiser

Get suggested send windows based on UK audience behaviour data - different times work for B2B vs retail vs hospitality. Stop guessing the best time to send. Agency

Build your first SMS campaign - free

SMS Builder plan limits

Free
5
SMS/month
  • Basic templates
  • Character counter
Starter · £29/mo
100
SMS/month
  • All templates
  • Personalisation tags
  • Cost calculator
Business · £49/mo
500
SMS/month
  • Campaign calendar
  • GDPR compliance mode
  • Multi-message sequences
Agency · £99/mo
Unlimited
SMS/month
  • Time optimiser
  • Multi-brand support
  • API access

Common questions

ClientRoots creates the SMS copy for you - the actual sending is done via your own Twilio or Textlink account, or through your preferred SMS provider. The tool generates the message, calculates the cost and checks compliance. You copy the output into your sender platform. API integration for direct send is available on Agency plan.

Under PECR (Privacy and Electronic Communications Regulations), you can only send marketing SMS to individuals who have explicitly opted in to receive messages from you. Every message must include a free opt-out mechanism ("Reply STOP"). ClientRoots flags missing opt-out language and highlights any content that may breach ICO guidelines.

A standard SMS is 160 characters using the GSM-7 character set. If you use special characters or emojis, the limit drops to 70 characters per credit (using Unicode encoding). ClientRoots's character counter tracks both and alerts you before you accidentally trigger a second credit charge.

The Campaign Calendar (Business plan and above) lets you plan and schedule when campaigns should go out. Actual scheduled sending depends on your SMS provider's API capabilities. The calendar gives you a visual plan of upcoming campaigns and sends a reminder notification when a campaign is due.

Reach your customers where they actually look

Text messages land where your customers actually look, on their phone. Build your first PECR-compliant UK SMS campaign free.

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