# Social Media vs Email Marketing: Which Should You Use?

> Source: https://prontx.com/insights/social-media-vs-email-marketing/ | Publisher: ProntX | Last updated: 2026-11-07

## Summary

Social media and email marketing do different jobs: social media is best for reaching people who do not know you yet, while email is best for converting and keeping customers because you own the list, so most UK businesses should use social to grow an email list and email to drive sales.

Social media vs email marketing is not a straight contest, because the two channels do different jobs. Social media is best at reaching people who have never heard of you. Email is best at turning people who already know you into buyers and repeat customers, because you own the list and reach the inbox directly. Most businesses need both.

We get asked this question at ProntX by owners who have a limited budget and want to put it in one place. The honest answer depends on where your customers are in their journey with you, what you sell, and how much time you can give each channel. This article compares the two on the points that decide the matter in the UK: audience ownership, reach, rules, cost and measurement. It ends with a simple framework for choosing where to start.

## Key takeaways

- **Social media finds new people.** It is a discovery and trust channel, and paid social can put you in front of a precise audience quickly.

- **Email sells to people who already know you.** You own the list, so no platform can cut off your access to it.

- **The UK rules are different.** Marketing emails to individuals are covered by PECR and need consent or the soft opt-in. Organic social posts do not need either.

- **The best set-up links them.** Use social to grow your email list, and use email to bring people back to buy.

- **Measure both on business results** such as enquiries and sales, not followers or opens.

## What is the difference between social media and email marketing?

Social media marketing is publishing content and running adverts on platforms such as Facebook, Instagram, LinkedIn and TikTok, where the platform decides who sees what. Email marketing is sending messages directly to people who have given you their address, where you decide who receives each message and when.

That one difference shapes everything else. On social, you are a guest in someone else’s feed and compete with friends, creators and other brands for attention. In email, you arrive in a personal inbox that the person checks with intent, and you are competing with fewer messages that matter to them.

The table below sets out how the two compare in practice.

| 
Factor | 
Social media marketing | 
Email marketing | 

| 
Main job | 
Discovery, awareness, trust and community | 
Conversion, repeat purchase and retention | 

| 
Who controls reach | 
The platform’s algorithm (organic) or your ad budget (paid) | 
You, subject to deliverability and inbox filtering | 

| 
Audience ownership | 
Followers belong to the platform’s account system | 
You hold the list and can move it between email tools | 

| 
Best for | 
People who do not know you yet | 
People who have already shown interest or bought | 

| 
UK permission rules | 
No consent needed to post; ads follow platform and advertising rules | 
PECR applies: consent or soft opt-in for individuals, opt-out in every message | 

| 
Typical cost model | 
Time to create content, plus ad spend if you run paid social | 
Email platform subscription, plus time to write and build flows | 

| 
How you measure it | 
Reach, clicks, enquiries and sales from tagged links in GA4 | 
Clicks, conversions and revenue per email, tracked in GA4 and your email tool | 

## Which is better for a small business, social media or email?

Neither is better in every case: social media is better for getting found, and email is better for getting paid. A new business with no customer list will struggle to do much with email on day one, while an established business with years of past customers is often sitting on its most profitable channel without using it.

Think about the questions a customer asks before they buy. Before they know you, they ask “who is this and can I trust them?” Social content, reviews and paid social ads answer that. Once they have enquired or bought, the questions become “when should I come back?” and “what else do they offer?” Email answers those better, because it arrives at the right moment and speaks to their history with you.

Your business model matters too. A café, salon or ecommerce store with frequent repeat purchases gets a lot from email reminders, offers and new product launches. A business that sells a one-off high-value service, such as a kitchen fitter, relies more on social proof and visibility to win each new job, then uses email for referrals and reviews.

## Do you own your audience on social media?

No. Your followers live inside the platform, and the platform decides how many of them see each post. If an account is suspended, a platform changes its feed, or your audience moves elsewhere, you have no direct way to contact them.

UK adults are still heavy social media users. Ofcom’s [Online Nation 2025 report](https://www.ofcom.org.uk/media-use-and-attitudes/online-habits/online-nation), published in December 2025 using May 2025 data, found Facebook and Messenger together were used by 93% of UK online adults in that month, for an average of 42 minutes a day. The audience is there. The catch is that how people use social media is changing.

Ofcom’s Adults’ Media Use and Attitudes research, published in April 2026 and based on 7,533 UK adults surveyed in late 2025, found that fewer than half (49%) were actively posting, sharing or commenting on social media, a fall on the previous year. The report links this to a move towards passive scrolling and liking. For a business, that means more people may see your post than will ever reply to it, and engagement figures alone will understate your reach.

An email list works differently. If you change email platform, you export the list and take it with you. That is why we treat the list as a business asset at ProntX, and why every client keeps ownership of their accounts and data.

## How do UK rules differ for email and social media marketing?

Email marketing to individuals in the UK is regulated by the Privacy and Electronic Communications Regulations (PECR), so you need consent or a valid soft opt-in before sending. Posting organic content on social media does not need anyone’s consent, although adverts must still follow platform policies and UK advertising rules.

The [ICO’s guidance on electronic mail marketing](https://ico.org.uk/for-organisations/direct-marketing-and-privacy-and-electronic-communications/guidance-on-direct-marketing-using-electronic-mail/how-do-we-comply-with-the-pecr-electronic-mail-marketing-rules/) sets out the main points:

- **Consent must be a clear positive action.** Pre-ticked boxes, silence or inactivity do not count, and you should keep a record of who consented, when and how.

- **The products and services soft opt-in has four conditions.** You collected the details yourself, you did so while selling or negotiating to sell (a quote request counts), you only market similar products and services, and you offered an opt-out when collecting the details and in every message after.

- **Bought-in lists rarely work.** The ICO says there is no such thing as a third-party marketing list that is compliant with the soft opt-in, and any consent on a bought list must name your organisation specifically.

- **Business addresses are treated differently.** You can send unsolicited marketing email to corporate subscribers without consent, but you must still identify yourself and give a valid way to opt out.

- **Charities have an extra route.** There is a separate charitable purposes soft opt-in that only charities can use.

There are also technical rules from the inbox providers. Google’s sender guidelines for Gmail, in force since 1 February 2024, require all senders to set up SPF or DKIM authentication and keep spam rates reported in Postmaster Tools below 0.3%. Anyone sending more than 5,000 messages a day to Gmail accounts must also set up DMARC and support one-click unsubscribe on marketing emails. Social platforms have no equivalent, but they can restrict accounts that break their own community or advertising policies.

## How do the costs of social media and email marketing compare?

Email is usually cheaper to run once your list exists, because sending to people you already have costs only the platform fee and the time to write and build. Social media tends to cost more over time, because reaching new people well usually means paying for ads as well as producing a steady flow of content.

The bigger cost of email is building the list in the first place. That is where social media earns its keep: a lead magnet, competition or booking offer promoted on social can turn followers into subscribers you own.

For reference, ProntX prices start from £450 a month for email marketing (flows, campaigns and list growth) and from £650 a month for social media marketing (organic content plus paid social management). Both are ex VAT on rolling monthly contracts, and any ad spend is paid directly to the platform. We cover the detail in our guide to [what email marketing costs in the UK](/insights/how-much-does-email-marketing-cost-uk/).

## How do social media and email marketing work together?

They work best as one system: social media brings new people in, and email keeps them coming back. Each channel covers the other’s weakness.

A simple joined-up set-up looks like this:

- **Turn followers into subscribers.** Give people a clear reason to join your list: a discount, guide, early access or booking reminders. Link to the sign-up form from your profiles and pin it.

- **Send new subscribers a welcome sequence.** Three to five emails that introduce your business, answer common objections and make a first offer.

- **Use email to feed social.** Ask customers for reviews, photos and tagged posts in your post-purchase emails, then share that content on social.

- **Retarget the gaps.** People who click an email but do not buy can be reached again with paid social, and social visitors who do not subscribe can be shown a sign-up offer.

- **Keep the message consistent.** Launch an offer by email to your list first, then on social a day later, so loyal customers feel looked after.

Our [social media marketing strategy guide](/insights/social-media-marketing-strategy/) covers how to plan the social side so it supports list growth rather than chasing likes.

## Which should you start with? A decision framework

Start with the channel that fixes your biggest gap today. If too few people know you exist, start with social media. If people know you but do not come back or convert, start with email. Use this checklist to decide.

**Start with email first if most of these are true:**

- You have at least a few hundred past customers or enquiries with permission to market to them.

- Customers buy more than once, or could if reminded.

- You have no welcome, abandoned basket or post-purchase emails set up yet.

- Social posts get likes but you cannot trace any sales to them.

**Start with social media first if most of these are true:**

- You are new, or have very few customer contacts.

- Your product is visual or easy to show in a short video.

- Buyers want to see proof, such as reviews, before they enquire.

- You need to reach a specific local or demographic audience quickly, which paid social does well.

**Run both when:** you have a list worth emailing and a need for new customers. In that case, keep social focused on reach and sign-ups, and email focused on sales and retention, and track both against the same GA4 key events so you can compare them fairly.

## How should you measure social media against email?

Measure both on the same business outcome, such as enquiries, bookings or revenue, rather than on each channel’s own vanity metrics. Followers and likes do not compare with opens and clicks, but a sale from each channel does.

Tag every link from social posts, ads and emails with UTM parameters so Google Analytics 4 credits the right source. Mark enquiries and purchases as key events. Then compare the cost per result for each channel over at least a quarter. Treat email open rates as a rough signal only, and give more weight to clicks and conversions, because those are the actions that lead to revenue.

## Getting the balance right

Social media and email are not rivals. One introduces you to new people, and the other turns that introduction into revenue you can repeat. If you are unsure where your gap is, our team at ProntX can look at your current list, flows and social accounts and tell you which to fix first. You can see how our [email flows and campaign work](/email-marketing/) is set up, how we run [organic and paid social](/social-media-marketing/), or read about [email for smaller businesses](/email-marketing/small-business/).

## Frequently asked questions

### Is email marketing more effective than social media?

For selling to people who already know you, email is usually more effective, because it reaches a personal inbox you control and can be timed to each customer. For reaching new people, social media is more effective, because email can only reach people who have already given you their address. Judge both on enquiries and sales rather than opens or likes.

### Can I add my social media followers to my email list?

Not automatically. Following you on Instagram or Facebook is not consent to receive marketing emails. Under PECR you need people to sign up with a clear positive action, or meet the soft opt-in conditions. The practical route is to promote a sign-up form or offer on social so followers can choose to join your list.

### Do I need consent to email business contacts in the UK?

For corporate subscribers, such as limited companies and public bodies, PECR does not require consent for marketing email. You must still identify yourself and give a valid way to opt out. If you are not sure whether a contact is a corporate or an individual subscriber, treat them as an individual and get consent or meet the soft opt-in conditions.

### Can I buy an email list and use it for marketing?

It is very risky. The ICO says no bought-in list can be compliant with the soft opt-in, because you did not collect the details yourself. Any consent on a bought list must name your organisation and cover email specifically. Most lists sold as 'opted in' do not meet that standard, so sending to them can breach PECR.

### How often should a small business send marketing emails?

Send as often as you have something useful to say and your list keeps engaging. For many small businesses that is two to four campaigns a month, plus automated emails such as welcome and post-purchase messages. Watch unsubscribes and spam complaints: Google asks senders to keep reported spam rates below 0.3%, so a rise is a sign to slow down.

### Is social media marketing free?

Posting organically is free in platform fees, but it is not free in time. Planning, creating and responding to content takes regular hours each week. Reaching people beyond your existing followers usually needs paid social, where you set a budget and pay the platform directly. Many businesses find a small ad budget makes their organic content go further.

### Should I stop posting on social media if email works better for me?

Usually not. Even if email drives most of your sales, social media is often how new people find and check you out, and an inactive profile can put them off. Scale social back to a sustainable rhythm focused on proof, such as reviews and recent work, and use it to keep growing your email list.

## Contact

Free growth audit: https://prontx.com/free-audit/ | Phone: 020 3048 4022 | Email: info@prontx.com