Bulk SMS Marketing Without a Per-Message Bill
Run campaigns from SIM cards you already pay for. The only new cost is the software license, and the contact list never leaves your machine.
The per-message problem in numbers
At low volume a cloud platform is cheaper. The crossover is the point worth calculating before you buy anything.
Assumptions: cloud all-in rate $0.0125 per segment (typical US, carrier fees included), one rented number at $1.15 a month, our Ultimate lifetime license $269, a $90 modem spread over three years, $12.50 a month maintenance, three years, one country, taxes excluded, SIM plan excluded because you already pay it. Prices captured 2026-11-04.
| Messages per year | Cloud, 3 years | SMS Deliverer, 3 years | Difference |
|---|---|---|---|
| 1,000 | $79 | $809 | Cloud is $730 cheaper |
| 10,000 | $416 | $809 | Cloud is $393 cheaper |
| 20,000 | $791 | $809 | Break-even zone |
| 100,000 | $3,791 | $809 | $2,982 saved |
| 500,000 | $18,791 | $809 | $17,982 saved |
Break-even is about 61,400 messages over three years, or roughly 20,500 a year. Run your own volume and cloud rate through the TCO calculator.
How a campaign runs on your own hardware
The work is the same as a cloud tool: list, message, schedule, report. The difference is where the messages go.
Clean the list
Normalise numbers, remove duplicates, apply the blacklist and the opt-out table before anything is queued.
Split by SIM
Divide the list across devices so no single SIM hits a carrier cap. Quotas are enforced by the software, not by memory.
Send in waves
Pace the campaign across hours or days. Waves reduce throttling and make failures easier to diagnose.
Read and act
Export the report, tag failures, and remove hard-bounced numbers from the next campaign.
Sender identity and deliverability
Recipients see the number of the SIM card that sent the message. That is a real mobile number, not a rented alphanumeric sender ID, which makes a difference in markets where unfamiliar short codes are filtered.
What we cannot promise: delivery. A carrier can reject, throttle or delay a message, and a recipient can block a number. The report tells you which of those happened.
What you control: the list quality, the pace, the SIM reputation and the opt-out handling. Those four decide most of your delivery rate.
Compared honestly
| Your SIM | Short code / A2P | |
|---|---|---|
| Shown as | A normal mobile number | Short code or sender ID |
| Cost | Your plan | Per message plus registration |
| Setup | Insert the SIM | Registration and approval |
| Best for | Known contacts, local sends | Large cold lists |
Consent, opt-out and records
Marketing messages need a lawful basis and a working opt-out. The software supports both; it does not decide either for you.
Opt-out keywords
STOP, STOPALL and UNSUBSCRIBE set a permanent flag. The flag survives CSV imports and cannot be overwritten by a new list.
Records you can export
Consent source, send time, SIM used and carrier response, exportable per campaign or per contact.
Quiet hours
Define legal sending windows per country and a buffer for time zones. Off-window messages wait in the queue.
Automation: scheduling, segments and replies
Birthday and renewal sends
Schedule a message per contact and reuse the template each year. No recurring subscription to a campaign tool.
Reply handling
Keywords in a reply trigger a template, a webhook call or a Telegram message, so a two-person team can keep up.
Segment reporting
Group contacts by store, clinic or region and compare delivered and failed counts per group.
Scheduling, templates and per-SIM reporting are covered on the desktop SMS software page.
Capability and limits
Supports
Bulk and personalised SMS, CSV lists, scheduling, opt-out handling, per-SIM reporting, two-way replies.
Not supported
No short-code rental, no cold-list phone-number database, no guarantee of delivery, no WhatsApp or RCS.
Depends on
Carrier throttling, SIM plan limits, list quality and local marketing law.
Marketing questions
Is bulk marketing SMS allowed on a normal SIM?
Rules differ by country and by carrier. Many carriers allow person-to-person and small business messaging but restrict bulk marketing on consumer plans. Check your carrier contract before a campaign.
How do I calculate the break-even against a cloud platform?
Everything the cloud charges per month counts: the message rate, number rental and any 10DLC fees. At a typical all-in US rate of $0.0125 per segment plus $1.15 for a number, the $269 license, a $90 modem and $12.50 a month of maintenance break even at about 61,400 messages over three years — roughly 20,500 a year.
Can I keep using my existing CRM?
Yes. Write rows into the outbox table, call the local HTTP API, or bind an SMPP client. The Ultimate edition exposes all three.
Will my messages look like spam?
They come from a real mobile number and reach people who expect them. Relevance, consent and pace matter more than the network; there is no technical trick that guarantees inbox placement.
What happens if a SIM is throttled?
The device pauses when the carrier rejects or delays messages, and the queue moves to another SIM if one is available. The report records the carrier error.
Can I run several brands from one PC?
Yes. Groups, templates and per-SIM reporting let one installation serve several brands as long as each brand has its own sender SIM and its own opt-out list.