Bulk SMS Messaging With Built-In Compliance
Bulk SMS messaging means sending the same text to a large contact list in one campaign. ColdTexting counts GSM-7 and Unicode segments before you send, scores each message for compliance, sends only to contacts with recorded consent and stops instantly when a contact opts out.
Segments explained
How bulk SMS messages are counted and billed
Knowing the segment count before you press send keeps a bulk campaign on budget and inside your plan.
Bulk SMS messaging is the sending of one identical or lightly personalized text to a large list in a single campaign. Carriers do not bill per message, they bill per segment. A segment is the unit a text is split into on the network, and its size depends on the character set the message needs.
GSM-7 covers plain Latin letters, digits and common punctuation, and fits 160 characters in one segment. A single character outside that set, such as a curly apostrophe pasted from a document, an accented letter outside the basic set or an emoji, switches the whole message to UCS-2, where one segment holds only 70 characters. The same 150 character reminder then costs three segments per contact instead of one.
| Encoding | Single segment | Per part when longer |
|---|---|---|
| GSM-7 | 160 characters | 153 characters |
| UCS-2 | 70 characters | 67 characters |
List quality
A clean list is the fastest route to the inbox
Carriers watch opt-out and complaint rates on every bulk send. The import step removes the contacts most likely to complain before they ever get a text.
- Consent travels with the contact. Each row keeps its source, timestamp, IP address and form text, so a bulk send can be defended contact by contact.
- Purchased lists stop at the door. A file without an opt-in source does not import, whatever its size.
- Opt-outs stay out. Numbers that texted STOP once are matched against every new upload and never re-enter a list.
Scale and Enterprise add a litigator and reassigned number scrub on import, which flags contacts whose number changed owner since they opted in.
Deliverability
Why carriers filter bulk texts and how to stay clear
Carrier filters look for patterns that spammers share. Identical texts with no brand name, public link shorteners, shouting in capitals, money and urgency phrases, and high opt-out rates from a fresh number all raise the risk that a message is blocked silently. The fix is rarely a different provider. It is a better message and a registered sender.
Personalization helps twice. A first name and a provider name make the text read as a one to one note, and the variation between messages looks less like a template blast. You can check your SMS for compliance before the campaign is built, and the same score runs again on the confirm screen.
When bulk sends become a recurring program with segments and schedules, they turn into SMS marketing campaigns with their own reporting. Teams that send to very large lists on short notice usually compare plans with a mass texting service setup on Growth or Scale.
FAQ
Questions about bulk SMS messaging
A bulk SMS service delivers one message to many recipients from a business number, with scheduling, merge fields, delivery reports and opt-out handling built in.
Messages are billed in segments. A plain GSM-7 text fits 160 characters in one segment, and an emoji switches the message to Unicode, which fits 70 characters per segment.
Carriers filter unregistered 10DLC traffic, URL shorteners, missing brand names and content patterns that look like spam. ColdTexting flags each of these before the campaign is scheduled.
Yes. Merge fields such as first name, company and owner insert contact data into every message, and the preview shows the final segment count.
Count every segment before a bulk send leaves
Every plan shows segment totals, consent coverage and a compliance score on the confirm screen. Starter begins at $24 per month billed yearly.