In this guide
  1. Quick answer
  2. GoHighLevel: best for service businesses
  3. Other SMS platforms
  4. Side-by-side comparison
  5. A2P compliance: what you need to know
  6. Frequently asked questions

Quick answer

For service businesses and agencies: GoHighLevel is the best SMS marketing software because it combines two-way SMS, automation workflows, missed call text-back and CRM in one platform. For e-commerce brands with large lists: Klaviyo or Attentive. For high-volume transactional SMS: Twilio (developer-required).

SMS messages are read within 3 minutes of delivery 90% of the time. No other marketing channel comes close to that immediacy.

GoHighLevel: best SMS tool for service businesses

GoHighLevel is the most complete SMS marketing platform for service businesses and agencies. It handles two-way SMS conversations, automated SMS sequences, missed call text-back, appointment reminders, review requests and mass SMS campaigns, all within one platform that also includes CRM, email and booking.

The key differentiator for service businesses is the missed call text-back: when a prospect calls and you miss it, GoHighLevel automatically texts them within 60 seconds. This single automation consistently can re-engage some missed callers; measure the rate in your own account.

SMS runs through Twilio on the backend, so messages are charged per segment (~$0.0079/segment outbound). Most small service businesses spend $20 to $40 per month in SMS usage on top of the platform fee.

Price: $97/mo (Starter) + usage fees (~$0.0079/SMS)

Other SMS platforms worth knowing

SimpleTexting

SimpleTexting is a straightforward SMS marketing tool for businesses that primarily want to send mass text campaigns and keyword opt-ins. It is easier to set up than GoHighLevel but does not have CRM, automation workflows or a missed call text-back. Good for businesses that just want to send promotional broadcasts to a list.

Price: $39/mo for 500 messages, usage-based above that

Klaviyo SMS

Klaviyo combines email and SMS marketing for e-commerce brands. The strength is purchase-triggered automation: abandoned cart SMS, post-purchase follow-up, restock alerts. It is not built for service business workflows and lacks CRM and booking features.

Price: Based on contacts and message volume

EZTexting

EZTexting is a basic SMS broadcast platform for businesses that want to send text campaigns to a list. No CRM, no automation workflows, no two-way conversation management. It is simple and affordable for pure broadcast use cases.

Price: $25/mo for 500 messages

Twilio

Twilio is the underlying infrastructure that most SMS platforms (including GoHighLevel) use. It gives developers direct API access to SMS, voice and WhatsApp at the lowest possible cost per message. It requires developer setup and is not a ready-to-use marketing tool for non-technical businesses.

Price: ~$0.0079/SMS outbound, no monthly fee

Side-by-side comparison

FeatureGoHighLevelSimpleTextingKlaviyo SMSEZTexting
Two-way SMS conversationsLimited
Automated SMS sequencesBasic
Missed call text-back
Appointment reminders
Mass SMS campaigns
CRM integrationBuilt-inLimited
Review request automation
A2P 10DLC compliance help
Starting price$97/mo + usage$39/moUsage-based$25/mo

A2P compliance: what you need to know

Before sending business SMS in the United States, you must register for A2P 10DLC (Application-to-Person 10-Digit Long Code) compliance. This is a carrier requirement that verifies your business identity and intended SMS use case. Without registration, your messages may be filtered or blocked.

GoHighLevel guides you through A2P 10DLC registration within the platform. The registration fee is typically $4 to $10 one-time plus a monthly brand registration fee. Most service businesses complete this in under an hour.

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Frequently asked questions

What is the best SMS marketing software for small business?
GoHighLevel is the best SMS marketing platform for small service businesses and agencies because it combines two-way SMS, automation workflows, CRM and booking in one platform. SimpleTexting or EZTexting work for businesses that only need to send mass text campaigns without automation.
Is SMS marketing legal?
Yes, with consent. You must have explicit opt-in consent from recipients before sending marketing SMS. You must also provide a clear opt-out mechanism (usually replying STOP) and honour opt-outs immediately. All major SMS platforms handle the technical opt-out compliance. You are responsible for collecting consent before adding contacts to your lists.
How much does SMS marketing cost?
Most SMS platforms charge per message. Typical costs are $0.007 to $0.015 per outbound SMS segment. A segment is 160 characters. A 320-character message counts as two segments. Most small service businesses spend $20 to $60 per month on SMS usage. Platform subscription fees range from $25/mo (basic broadcast tools) to $97/mo+ (full automation platforms like GoHighLevel).
What is missed call text-back?
Missed call text-back is an automation that sends an automatic SMS to anyone who calls your business number but does not get answered. The message typically says something like your message received, you will call back shortly, and asks what they need help with. GoHighLevel fires this within 60 seconds of a missed call, recovering leads that would otherwise hang up and call a competitor.

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