SMS or Email: Which Fits Your Clinic's Next Marketing Campaign?

Quick answer: Choose SMS or email based on the service you are promoting, whether your contacts still use that channel, and what the message needs to explain. Plan SMS around a compact message and one clear action. Consider email when the campaign needs more explanation or several details. Then use a split test to check which approach fits your audience. Before sending either campaign, confirm marketing consent, provide a clear way to stop messages, and have trained clinic staff and doctors ready for responses.

Start with the service you are promoting

When I choose between SMS and email, I start with the type of service being promoted and use split testing to help decide.

That puts the campaign's purpose ahead of a general preference for either channel. Instead of asking which channel is always better, ask what someone needs to understand before taking the next step.

For a straightforward promotion, consider whether you can explain the offer clearly in a compact message. Can the reader understand what it is, any important conditions, and how to respond?

If the campaign needs a longer explanation, consider email. You can plan separate sections for the offer, its conditions and the next step, rather than trying to squeeze everything into a short text.

The service still matters. Do not remove necessary context just to make a message shorter. If someone needs an individual medical answer before deciding, leave that answer to the doctor.

This article concerns a separate marketing campaign to existing contacts who have agreed to receive marketing. For an unfinished inquiry, see our guide to following up with clinic inquiries.

Check whether your contacts still use the channel

Before choosing a channel, I check whether the audience still uses that platform.

Make that a separate check from marketing permission. Confirm both: whether you have permission for the planned campaign and whether the channel is still suitable for reaching these contacts.

Use information the clinic already has permission to use. Review recorded channel preferences and previous requests to stop, and check whether contact details need updating through an appropriate process.

Do not send a marketing message to test whether someone wants marketing. Establish permission before including them in the campaign.

If you cannot confirm permission for a contact, leave that person out until the clinic has resolved it. For either channel, confirm the applicable Philippine Data Privacy Act consent requirements and provide a clear way to stop receiving marketing messages.

Compare the message, space and links

Write a draft for each channel before committing to either one. This makes the comparison concrete.

For SMS, aim for a message that identifies the clinic, explains the promotion and gives one clear next step. Include the way to stop messages. Review the full message in your sending tool, including any link and required wording, before approving it.

For email, use the available space deliberately. Give the message a clear subject, explain the offer early, and organize supporting details so the reader can find them. Keep the main action easy to identify.

More space is useful only when the extra information helps someone decide. Avoid adding unrelated services just because there is room.

For either channel, decide what the link is meant to do. Should it open the offer details, a booking page or a way to contact the clinic? Check that the destination matches the message and works on a phone.

If you need help deciding what belongs on the destination page, our guide to a clinic website versus a Facebook page covers that separate question.

Compare the full cost of running the campaign

Use your actual provider quotes and account terms when comparing costs. Avoid choosing a channel from a generic claim that one is cheaper.

For the SMS draft, check how the sending provider counts and charges for the complete message. Confirm how the final wording affects the quoted campaign cost before approving the send.

For email, check the charges that apply to your account, contact list and planned sending volume. Include any setup or design work needed for this campaign.

For both, allow for staff time: preparing the audience, checking the message, answering replies and recording requests to stop.

Compare the cost against the same campaign objective. If your goal is booking requests, agree what counts as a booking request before sending. Do not choose a winner using one measure for SMS and a different measure for email.

Use a split test to answer a specific question

Split testing is part of how I choose the channel. Start by stating what you want the test to answer.

For example: for this service and this audience, which channel brings more booking requests within the agreed review period?

For a channel comparison, use contacts with confirmed marketing permission for both channels. Divide them into comparable groups and keep the offer, main action and timing as similar as practical.

Adapt the wording to each channel while keeping the offer consistent. If the SMS promotes one service and the email promotes another, you will have a less useful answer about the channel itself.

Agree on the review period, how staff will record responses and which result matters before launching. Record requests to stop alongside the campaign results.

Treat the finding as evidence for that service, audience and campaign. Use it to guide the next test rather than declaring one channel the permanent winner.

Prepare for replies and requests to stop

Before a campaign goes out, I want trained clinic staff and doctors ready for replies and stop requests.

Turn that into clear assignments. Name who checks each inbox, who answers booking questions, who passes medical questions to a doctor and who records a request to stop marketing.

Test the reply route before sending. For SMS, confirm how recipients can respond and how staff will see those responses. For email, check the reply address and who monitors it. Do not invite people to reply unless someone is assigned to receive and handle those messages.

Make the stop instructions clear and check that the process works. Staff should know how to record a request and keep that contact out of later marketing sends. Avoid making the person explain why they want to stop.

Keep medical questions with the doctor. Marketing staff can help with the next administrative step without giving medical advice.

Choose the channel your clinic can support

At Revflow, the starting questions are the service being promoted, whether the audience still uses the channel, and whether trained staff and doctors are ready for responses.

Consider SMS when the full message fits a compact format with a clear action. Consider email when the offer needs more organized detail. Check permission, actual costs, links, replies and stop handling for either choice.

Then test the campaign against a defined result. The useful answer is which channel fits this service, these contacts and the clinic's ability to handle what comes back.

Prepared with AI assistance. Migo reviewed and approved the article, and Revflow checked its factual claims before publication.