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WhatsApp is the highest open rate channel a recruitment or search business can use, but it deepens relationships you already have rather than starting new ones.
What that means in practice:
- WhatsApp has more than three billion monthly users, with open rates of 95 to 98% against roughly 20 to 25% for email.
- It has no discovery algorithm and no professional targeting layer, so it cannot introduce you to anyone new.
- It works best with candidates and clients who have already given you their number, where it speeds up screening, scheduling, briefs and updates.
- Clients genuinely do come through it, but only where the relationship already exists.
- Used to approach people cold, it risks blocking, reporting and a breach of UK consent rules under PECR and GDPR.
The deciding question is not candidates versus clients; it’s warm versus cold.
Of all the channels in this series, WhatsApp is the one I get asked about in the most roundabout way. Business owners rarely ask me whether it works. They ask me what it’s for.
That makes sense, because most of you are already using it. It’s on your phone. You message your team on it. You message your family on it. You’ve probably messaged a candidate on it, because it was quicker than email and they replied in four minutes rather than four days.
So the question isn’t whether WhatsApp works. It clearly does something, or you wouldn’t keep reaching for it.
The question is whether it belongs in your marketing plan, and if it does, what job it’s doing there.
I’ll give you my answer up front.
WhatsApp doesn’t start relationships. It deepens the ones you already have.
Get it the wrong way round and use it to approach people who don’t know you, and it will do you real damage.
How Big Is WhatsApp?
WhatsApp has more than three billion people using it every month, a figure confirmed by Mark Zuckerberg on Meta’s earnings call in April 2025. Trackers in early 2026 put it between 3.14 and 3.3 billion. Somewhere between 2.3 and 2.6 billion people open it every day, around 83% of the monthly base, and it’s available in more than 180 countries.
For context, Facebook sits at around 3.07 billion monthly users, so the two are neck and neck at the top of this series.
In the UK, research cited by the communications regulator and published in December 2025 found around 90% of UK online adults used WhatsApp, roughly 44.2 million people. That’s the most authoritative UK figure available.
The US and Australia are messier. US estimates run from 87 million to 124 million depending on which tracker you read. Australia sits somewhere between 9 million and 13 million. I’m giving you ranges rather than a tidy number because Meta doesn’t publish country by country data, and I’d rather tell you the truth than give you false precision.
The number to hold on to is the UK one. Nine in ten UK adults online are on this app. Your candidates are there. So are your clients.
What WhatsApp Is Not
This is the part that changes how you think about it.
Every other channel in this series has an algorithm. On Instagram, LinkedIn, TikTok or YouTube, you create something, the platform decides who sees it, and if it’s good enough it reaches people who have never heard of you. Reach is earned.
WhatsApp doesn’t work that way. There’s no feed ranking your content and no discovery mechanism putting you in front of strangers. Your reach is limited to people who already have your number, or people who click an advert to start a chat.
WhatsApp doesn’t build your audience. It communicates with the audience you already have.
There are two partial exceptions. WhatsApp Channels, launched in 2023, is a one way broadcast feature that had reached 500 million monthly users by June 2024. And WhatsApp Status, viewed daily by around 500 million people, takes up roughly a third of the time people spend in the app. Both are useful. Neither will introduce you to a hiring manager who has never heard of you.
The second structural point matters just as much. WhatsApp has no professional layer. There are no job titles, no company data and no seniority filters. Nothing tells you whether the person on the other end is an HR director or a school leaver. LinkedIn knows who people are professionally. WhatsApp knows a phone number.
Where WhatsApp Is At Its Strongest
If it won’t introduce you to anyone new, what will it do?
It will make every conversation you’re already having faster, warmer and far more likely to be read than anything else you have.
Look at the numbers. WhatsApp messages are opened at somewhere between 95 and 98%. Email sits at roughly 20 to 25%. Broadcast campaigns on WhatsApp are reported to convert at 15 to 25%. And 78% of job seekers now apply on a smartphone, so your candidates are already living in this format.
Here’s where recruiters are genuinely getting value:
- Screening questions answered in minutes rather than over two days of phone tag
- Interview scheduling and confirmations, which cuts no shows
- Status updates during a process, so candidates aren’t left in silence
- QR codes that take someone straight into a chat to start an application
- Sourcing internationally, particularly in markets like India, Brazil and the Middle East where WhatsApp is the default messenger
- Keeping a warm client contact updated, once they’ve given you their number
Every one of those is about speed and experience with someone who already knows who you are.
And Yes, It Works With Clients Too
It would be easy to read the last section and conclude WhatsApp is a candidate only channel. It isn’t.
Once a hiring manager has given you their mobile number, WhatsApp becomes the fastest route to them you’ll ever have. Briefs come through as a voice note on the way to a meeting. Questions get answered in minutes. You stop being a supplier they email and start being the recruiter they message.
We’ve won clients through WhatsApp ourselves, and so have members of ours. But in every case the relationship came first, and the number was given rather than found.
That’s the distinction that matters here, and it isn’t candidates versus clients. It’s warm versus cold.
The Line Between Warm and Cold
This goes wrong at exactly one point, and that’s when you use WhatsApp to approach someone who hasn’t given you their number and doesn’t expect to hear from you.
I know the temptation. You’ve got mobile numbers sitting in your CRM going back years. It feels like an easy win sitting there. Leave it alone, for three reasons.
One: There’s No Cold Route In
You need a number someone has given you, or you need them to click an advert. There’s no equivalent of a LinkedIn connection request here. And if you’ve bought a list of mobile numbers, you’ve got a bigger problem than channel choice.
Two: The Consent Risk Is Real
Unsolicited business messaging on WhatsApp can breach UK consent rules under PECR and GDPR. This isn’t a grey area you can talk your way out of, and the penalties attach to the business rather than the individual who sent the message.
Three: It Breaks the Social Contract
A hiring manager gave their number to their kids’ school, their plumber and their friends. A pitch from someone they don’t know arriving in that space doesn’t read as enterprising. It feels like an intrusion, and the two buttons available to them are block and report.
Note what you lose. The same message on LinkedIn would have been unremarkable. Sent on WhatsApp to someone who never gave you the number, it costs you a contact permanently.
There’s one more thing, and it isn’t comfortable. WhatsApp has become a common vector for recruitment scams. Fake recruiters, fake roles, fake interviews, all run through this app. Candidates are increasingly wary when a recruiter they don’t know appears in their messages. That doesn’t mean you can’t use it. It means you introduce yourself properly, identify your company immediately, and give people a way to verify you.
What WhatsApp Costs
Basic use is free. A WhatsApp Business profile costs nothing and takes minutes to set up. A photo, a business description, a greeting message and an away message, and you’re running.
Costs appear when you want to send at volume or advertise. From the first of January 2026, Meta moved to charging per message rather than per conversation. UK rates published across 2026 sources range from just over a penny to about seven pence per marketing message, depending on category and source. Messages a customer starts remain free within a 24 hour window.
To send in bulk or automate anything you need a Business Solution Provider. Platform subscriptions typically start between nine and fifty pounds per channel per month, plus VAT, on top of the per message cost.
Click to WhatsApp adverts run through Meta Ads Manager on Facebook and Instagram, and open a chat rather than sending someone to a landing page. US benchmarks from 2026 put a good cost per click between ten and fifty cents, and a cost per lead who goes on to start a conversation at one to three dollars. No UK or Australian benchmarks exist in the sources reviewed, so if you test this you’ll be gathering your own numbers.
How to Measure It
Native analytics on the free Business app are basic: messages sent, delivered, read and received, visible in your settings. The Business Platform adds message level data, and third party platforms will layer on a proper funnel view for a subscription.
For most recruitment business owners, four numbers tell you everything:
- Response rate. What proportion of people reply?
- Time to first response. How much faster is this than email?
- Message to booked conversation. How many turn into an interview or a call?
- For paid adverts, cost per conversation started and cost per qualified lead
Best Practice, and the Mistakes to Avoid
What works
- Set up a separate WhatsApp Business profile rather than running your desk from your personal number
- Brand it properly with a photo, company name and what you do, so anyone receiving a message sees straight away who you are
- Use it for screening, scheduling, updates and confirmations
- Use Status or a Channel for passive nurturing of your candidate pool rather than messaging people one by one
- Use simple automation for first response and interview slot booking
What to avoid
- Cold business development messages to hiring managers who haven’t opted in
- Failing to identify yourself in the first line, which in the current climate makes you look like a scam
- Over messaging. The moment WhatsApp feels like a mailing list, you’ve destroyed the thing that made it work
- Treating it as a brand building channel. Nobody is discovering you here
Is WhatsApp Right For Your Business? Four Questions
If you answer yes to two or more, it’s worth setting up this month.
One. Does your business handle high volume or time critical candidate communication, where being first to respond wins you the placement?
Two. Do you source candidates internationally, particularly in markets where WhatsApp is the default way people communicate?
Three. Is candidate experience somewhere you’re currently losing people, through slow responses, silence during a process or no shows at interview?
Four. Do you have candidates or clients who have given you their mobile number and would expect to hear from you on it?
If you answered no to all four, and particularly to the last one, the problem isn’t WhatsApp. It’s that you don’t yet have enough relationships to put on it. Build those first, on LinkedIn, on email and through your content. Then come back to this.
Pulling This Together
WhatsApp is one of the two largest platforms in this series and easily the most misunderstood.
It won’t build your brand and it won’t put you in front of anyone who has never heard of you. Those jobs belong to other channels.
What it will do is make every relationship you already have faster, warmer and more likely to turn into something. That includes candidates, and it includes hiring managers who have come to trust you enough to give you their number.
So build the relationship first. Let people give you the number rather than digging it out. Then use this channel for what it’s genuinely brilliant at.
Thanks
Denise
How We Can Help You
Knowing which channels to use is one thing. Having the content, the campaigns and the plan to run them consistently is another.
That’s what we do inside Superfast Circle. Our members get done for you content every month, monthly coaching calls and a clear system that takes the guesswork out of what to post, where and when.
If you want to find out more get in touch.
