Web push vs email vs SMS: which channel for what

I get asked which channel is best fairly often. The honest answer is that they do different jobs, and the mistake is using one of them for everything.

Here is how I think about the three.

What each channel asks from the person

This is the difference that matters most, and it decides who you can reach at all.

The low effort of push is its biggest strength and its biggest risk. People say yes easily, and they take it back easily.

Email: for things worth reading

Email is still the best channel for anything with substance: newsletters, receipts, long updates, offers with conditions, anything people might want to find again later.

It is also the channel that needs the most from the reader up front. Most visitors to most sites never type their address anywhere. Those who do are usually your most committed audience, which is why email lists perform well and grow slowly.

Use email when the message needs room, or when it needs to be kept.

SMS: for the few things that must arrive

SMS reaches almost any phone, and people read texts. That is exactly why it should be used sparingly. A text feels personal, and a marketing text that wasn't expected feels like an intrusion.

It also costs money per message, and rules around consent for marketing texts are strict in many countries.

Use SMS for delivery updates, appointment reminders, security codes and the rare message that truly can't wait. For most content sites, it is not the place to start.

Web push: for timely nudges to people you can't email

Web push is the channel for "this just happened" or "this is ready now", sent to people who were interested enough to click allow but would never have filled in a form.

It works on desktop and Android browsers directly. On iPhone and iPad it works for sites added to the Home Screen, which means a smaller share of a typical audience there.

The catch is that it is easy to overuse. Since October 2025 Chrome removes notification permission automatically for sites people don't interact with, when engagement is very low and volume is high. A push list needs restraint to stay alive.

Use web push for short, timely messages to people who opted in, at a frequency they would choose themselves.

Which one should you start with?

Some rules of thumb:

• You publish content regularly (news, blog, media): email for the loyal core, push for everyone else who reads you. Push will likely reach more people than your newsletter, with less in each message.
• You run a shop: email for orders and offers, push for timely things the shopper showed interest in, SMS only for delivery if at all.
• You run a SaaS product: email for onboarding and account messages, in-app messages for users who are logged in, push for the few events people would want to know about immediately.
• You have a local or community site: push is often the easiest first channel, because the audience is unlikely to sign up for yet another newsletter.

Using them together without annoying people

The trap with several channels is sending the same thing everywhere. Someone who gets the same message as an email, a push and a text in the same hour feels hunted, not informed.

A few habits help:

• Pick one channel per message type. News goes to push, the weekly roundup to email.
• Respect quiet hours in every channel, not just the expensive one.
• When someone engages in one channel, hold back in the others.
• Measure each channel against a holdout, so you know what it adds rather than what it claims.

How EngageNudge fits

EngageNudge is a push platform. It doesn't send email or SMS, and it doesn't pretend to replace your email tool.

What it does is make the push channel last: a soft prompt before the browser asks, per-person caps and quiet hours before every send, and a holdout group on every campaign so you can see what push adds next to the channels you already have.