SMS or printed flyers?
A flyer holds more information and colour photos, but design, printing and distribution push the cost up. Many flyers are thrown away at once, some are never delivered, and above all you cannot send an offer to thousands of people within minutes.
A flyer can’t tell you who saw it; SMS gives you a delivery report.
SMS or email?
Email is fast, cheap and can include images. But email providers keep tightening their filters, and many messages end up in spam — even when the customer subscribed themselves.
It only takes a few recipients pressing “spam” instead of “unsubscribe” to damage the sender’s reputation and sharply cut how many people receive your emails. SMS doesn’t have this problem.
SMS or Viber?
In Viber, links usually open in the app’s internal browser with no saved passwords. Customers are asked to sign in to Google or your shop and very often give up — or suspect a scam.
With SMS the link opens in their phone’s own browser, where they are already signed in.
Full comparison