Every European campaign that wants to reach voters on their phones ends up at the same fork: WhatsApp or SMS? Both land in a pocket, both get read within minutes, and both feel more personal than an email or a social post that an algorithm may never surface. But they are not interchangeable, they differ on price, on who they reach, on what you are allowed to say, and, crucially for a *political* organization in Europe, on whether you are even permitted to use them the cheap way. This guide compares the two channels the way a campaign actually has to weigh them, and points you to a calculator for each side so you can run your own numbers.
The European backdrop: WhatsApp is the default chat app
In most of Europe, WhatsApp is not *a* messaging app, it is *the* messaging app. In Spain, Italy, Germany and the Netherlands it sits on the overwhelming majority of smartphones and is the everyday channel people use to talk to family, colleagues and their kids’ school. That ubiquity is exactly why campaigns are drawn to it: a message on WhatsApp lands in the same thread as a voter’s most trusted conversations. SMS, by contrast, is universal in a different sense, every phone on every network can receive it, no app, no account, no data connection required, which makes it the one channel that reaches *everyone*, including the older and less-connected voters who decide many European elections.
So the honest headline is: neither channel wins outright. WhatsApp wins on depth of engagement where it is installed; SMS wins on universal, no-friction reach. The interesting decisions are in the details below.
The one rule that reframes the whole comparison
Before any price table, there is a rule that changes the maths for political actors specifically: Meta bars electoral, political and advocacy organizations from the official WhatsApp Business API. Applications from parties, candidate committees and campaign vehicles are routinely declined, and accounts caught sending political content can be suspended. We cover the policy and the compliant workarounds in depth in We Are a Political Party, Can We Use the WhatsApp API?.
Why does this reframe everything? Because the cheap, automated, per-message version of WhatsApp, the one whose rates you can price on our WhatsApp API Pricing Calculator, is the version parties usually cannot use. For a campaign, WhatsApp therefore splits into two very different things: a low-cost commercial API that is largely off-limits, and a set of free native features (broadcast lists, groups, channels, communities) that are fully allowed but manual and capped. SMS has no such split: it is a paid channel that is legal for political outreach across the EU, provided you have consent. Keep that asymmetry in mind as you read the price section, it is the single most important thing on this page.
Price: what each channel actually costs in Europe
Start with the sticker prices, then apply the party caveat above.
SMS. Application-to-person (A2P) SMS is comparatively expensive in Europe, pricing is set country by country and operator by operator, and Western-European termination fees are among the highest in the world. As a planning range, marketing SMS commonly costs on the order of €0.04–€0.10 per message in much of Western Europe, with some markets higher, plus any sender-ID registration fees. It is a real, per-message cost you pay whether the recipient reads the message or not, but it is a channel a political campaign is fully entitled to use. For precise, per-country figures, run them through the SMS vs WhatsApp cost calculator on sms.democrat, a companion site we run that specializes in SMS economics for campaigns.
WhatsApp (the API rates). Meta bills the official API per delivered template message, priced by the recipient’s country and the message category. Political outreach is *marketing*, the most expensive category. As of the current rate card, marketing messages run roughly €0.05–€0.13 each across Western Europe, about €0.1131 in Germany, €0.1323 in the Netherlands, €0.0712 in France, €0.0658 in Italy and €0.0585 in Spain, and are cheaper across Central & Eastern Europe, often €0.03–€0.07 (Poland is around €0.03). Those figures come straight from our own dated rate card; you can price any market and volume on the WhatsApp API Pricing Calculator and see every change since 2019, with sources, on the WhatsApp API price history. So per message, WhatsApp marketing is often *cheaper* than European SMS, but remember the rule above: as a party, you generally can’t buy it.
WhatsApp (the free route parties actually use). Broadcast lists, groups, channels and communities cost nothing to send. There is no per-message fee at all. The “cost” is labour and reach limits: a broadcast list tops out at 256 contacts and only reaches people who have saved your number, and everything is sent by hand by activists rather than automated. That is a genuinely different economic model from SMS (free but effort-intensive and viral-by-network) and it is the one most European campaigns build on. The full playbook is in How to Bulk-Send WhatsApp Messages as a Political Party and Broadcast Lists: the Secret Weapon to Spread Political Content.
| Channel | What you pay | Typical EU cost | Open to parties? |
|---|---|---|---|
| SMS (A2P) | Per message, always | ~€0.04–€0.10 each | Yes, with consent |
| WhatsApp API (marketing) | Per delivered message | ~€0.05–€0.13 (West), €0.03–€0.07 (CEE) | Rarely, political use restricted |
| WhatsApp native (broadcast/groups/channels) | Nothing per message | Free, but manual & capped | Yes, fully allowed |
The practical takeaway: if you want a paid, automated, scalable push in Europe, SMS is the channel you can actually buy. If you want a free, high-trust, community push, WhatsApp’s native features are unbeatable on cost. The expensive-but-cheap-per-message WhatsApp API mostly isn’t on the menu for you. To compare the paid side directly against your SMS quotes, the sms.democrat calculator puts both per-message prices side by side.
Reach and deliverability
- SMS reaches every phone. No app, no account, no internet, a message hits any handset on any network. For a broad, older or rural electorate, nothing matches it. Deliverability is high and predictable, and there is no algorithm between you and the voter.
- WhatsApp reaches the connected majority, if they’ve opted in. Penetration is enormous in Southern and Western Europe, but a native broadcast only arrives if the recipient has saved your number, and API messages need a prior opt-in template relationship. Reach is deep rather than universal.
- Neither is throttled by a feed. Unlike organic social, both channels deliver straight to the person. That direct line is the whole reason campaigns invest in phones over posts.
- Number risk is asymmetric. SMS sender IDs are registered and stable. A WhatsApp number pushed too hard (especially via an unofficial API) can be banned, taking your audience with it, so pacing and warm-up matter (see how to warm up a WhatsApp number).
Results: open rates, engagement and conversion
Both channels enjoy the famous ~90%+ open rates that make mobile messaging so attractive next to email. Where they diverge is what happens after the open. SMS is a one-shot notification: read, click, done, excellent for a get-out-the-vote nudge, a polling-station reminder, or a deadline. WhatsApp is a conversation: recipients can reply, ask a question, forward your message to a family group, or join an event thread. That two-way, shareable quality is why WhatsApp tends to outperform on *organizing* and *persuasion*, while SMS tends to outperform on *time-critical, one-way mobilization* where you simply need the message in front of everyone at once.
The forwarding dynamic is worth dwelling on. A single WhatsApp message that resonates can travel through dozens of trusted family and neighbourhood groups on its own, reach you did not pay for and an SMS can never generate. That cuts both ways, which is why it is worth understanding; our analysis of how the far right uses WhatsApp is essentially a study of this mechanic at scale.
Content: what you can actually say
| SMS | ||
|---|---|---|
| Length | 160 characters (then multi-part) | Long text, effectively no limit |
| Media | Plain text + a link (MMS is patchy in the EU) | Images, video, audio, documents, location |
| Interactivity | One-way; replies need a separate keyword setup | Native two-way chat, buttons, quick replies |
| Link previews | Bare URL | Rich preview card (title, image, description) |
| Personal feel | From a shortcode or sender ID | From a person or a verified profile, in a familiar app |
For a rich, visual message (a candidate video, an event flyer, a photo from the doorstep) WhatsApp is in a different league. For a terse, unmissable line, “Polls close at 22:00, your station is the school on Calle Mayor”, SMS’s very starkness is a feature. Whatever the channel, the WhatsApp Link Generator and the Bulk WhatsApp Sender Helper let you turn any poster, ad or SMS into a one-tap click-to-chat conversation, which is the natural bridge from a cheap SMS blast into a free, high-engagement WhatsApp relationship.
Compliance: GDPR and ePrivacy apply to both
In Europe, unsolicited direct marketing by electronic means (SMS and WhatsApp alike) is governed by the ePrivacy Directive and the GDPR. The practical rules that matter for a campaign:
- Consent first. You generally need prior, specific, informed opt-in before messaging someone politically. Buying or scraping lists is both non-compliant and reputationally toxic.
- Political opinions are “special category” data. Inferring who to message from someone’s presumed politics raises the bar under the GDPR, tread carefully and document your lawful basis.
- Every message needs an easy opt-out. A clear “reply STOP” (SMS) or an unsubscribe path (WhatsApp) is mandatory, and opt-outs must be honoured immediately.
- Identify yourself. The sender must be obvious. Anonymous or misleading political messaging invites both regulatory action and voter backlash.
- WhatsApp adds its own terms on top of the law (including the political-use restriction on the API) so “legal under GDPR” is necessary but not sufficient for WhatsApp.
So which one? A European playbook
The strongest European campaigns rarely choose. They layer the two channels to their respective strengths:
- Use SMS for universal, time-critical mobilization (GOTV reminders, deadlines, polling-station details) where you need to reach every registered supporter, including the offline majority, and you are willing to pay per message for guaranteed delivery.
- Use WhatsApp’s free native features for organizing and persuasion, broadcast lists run by trained activists, territorial groups, a public channel at the top of the funnel, where engagement, two-way conversation and forwarding do the heavy lifting at zero per-message cost.
- Bridge them deliberately. Put a click-to-chat link in your SMS and on every poster so a cheap, universal SMS becomes an invitation into a free, high-trust WhatsApp community, and so supporters save your number, without which broadcast lists won’t reach them.
- Price both before you commit budget. Compare your per-country SMS quotes against WhatsApp’s marketing rates on the sms.democrat SMS-vs-WhatsApp calculator, and check the WhatsApp side against our own pricing calculator and price history.
For the wider strategic picture, the compliant WhatsApp toolkit, the automation options, and how to keep a number safe (start with We Are a Political Party) Can We Use the WhatsApp API? and the overview of ways to message many people on WhatsApp. And when it’s the SMS side you need to cost out or plan, sms.democrat is our companion project dedicated entirely to it.
Frequently asked questions
Is WhatsApp or SMS cheaper for a European campaign?
Per message, WhatsApp marketing templates are often cheaper than European A2P SMS (roughly €0.05–€0.13 vs €0.04–€0.10 in Western Europe). But political organizations are usually barred from the official WhatsApp API, so in practice the realistic comparison is paid SMS versus WhatsApp’s free native features (broadcast lists, groups, channels). Free wins on cost; SMS wins on reach and automation you can actually buy. Compare precise figures on the sms.democrat calculator and our WhatsApp pricing calculator.
Can a political party in Europe use WhatsApp at all?
Yes, just not the official Business API, which restricts political and electoral use. Parties can use WhatsApp’s free native features (broadcast lists, groups, channels, communities) fully within the rules, provided they have consent and honour opt-outs. See We Are a Political Party, Can We Use the WhatsApp API?.
Which channel gets better engagement?
Both see very high open rates. WhatsApp generally wins on engagement and persuasion because it is two-way and shareable, a message can be forwarded through trusted family and neighbourhood groups for free. SMS wins on universal, time-critical, one-way mobilization such as get-out-the-vote reminders, because it reaches every phone with no app or opt-in-to-save-contact step.
Do GDPR rules apply differently to WhatsApp and SMS?
The core rules are the same: under the ePrivacy Directive and the GDPR, both need prior consent for political direct messaging, an easy opt-out, and clear sender identification, and political opinions are special-category data. WhatsApp adds its own platform terms on top (including the API political-use restriction) so complying with the law is necessary but not sufficient for WhatsApp.
