Blog / Comparison
SMS or email for a small business list? An honest comparison
The pitch for SMS is that people read it. The pitch for email is that it is nearly free. Both are true, and that tension is the whole decision.
Open rates are real but misleading
SMS open rates get quoted around 98 percent and email around 20 percent. The SMS figure is close to honest, because a text appears on a lock screen whether you want it or not. But opening is not reading and reading is not acting. A text that gets glanced at and dismissed counts as opened.
Every source for the 98 percent number sells SMS services. Keep that in mind when it appears in a pitch deck.
Cost is where they genuinely diverge
Email at small-business volume is effectively free. Most platforms give you thousands of sends a month on a plan you already pay for. SMS bills per segment, every time, forever. At 4,000 contacts and weekly sends, you are looking at real monthly spend rather than a rounding error.
That changes how you write. You can afford a weekly email newsletter nobody asked for. You cannot afford a weekly text nobody asked for, and your audience would not tolerate it anyway.
List building is harder for SMS
Getting an email address is a low-commitment ask. Getting a phone number plus explicit marketing consent is a much bigger one, and the legal exposure if you get it wrong is on a different scale. Email mistakes cost you unsubscribes. SMS mistakes cost you statutory damages.
What each is actually for
SMS earns its cost on time-sensitive, short, high-value messages. An appointment reminder. A delivery window. A flash sale that genuinely ends tonight. Email carries everything that benefits from length, images or being read later.
Most businesses that do both well use email as the default and SMS as the exception. The temptation is to use SMS for everything because the open rate looks good on a slide. That is how you train people to ignore you, and unlike email, they can block the number.
Both need the same clean list
Whichever you pick, the input is the same: one row per person, no duplicates, valid contact details. If your contacts live on an iPhone, exporting them to CSV gives you a file both an ESP and an SMS provider will accept, assuming you have stripped the duplicates first.
Deliverability fails differently
Email that fails lands in spam, where it is at least theoretically recoverable. SMS that fails is filtered by the carrier, and the sender usually gets a success response anyway. You will not know unless you watch delivery reports per carrier.
Email reputation recovers over weeks of good behaviour. A number flagged by a carrier aggregator is harder to rehabilitate, and the usual remedy is a new number, which means starting over.
Use both, in sequence
The pattern that works for most small businesses is email for the announcement and SMS for the deadline. Send the newsletter on Monday, text the people who did not click on Thursday morning with one line and a link.
That requires the same person to be identifiable in both systems, which in practice means a shared list with both an email column and a phone column. One export, two destinations.
The list is the asset, not the channel
Platforms change, pricing changes, and a channel you rely on can become expensive with one rate-card update. A clean, deduplicated, properly formatted list of people who agreed to hear from you moves between platforms in an afternoon.
Get Pluck for iPhone
Pluck does the steps in this guide on your iPhone, with no server, no account, and no analytics. Group your contacts by country, find duplicates the iOS tool misses, and export to CSV, Excel, TXT, or vCard.