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The same message, both channels, side by side.

SMS charges by the segment; WhatsApp charges by the conversation. For a short reminder they’re close — for anything long or media-rich, they diverge fast. Paste your message and your rates to see which channel actually costs less for this send.

This message on SMS
UCS-2 3 segs
SMS total
450.00
WhatsApp total
100.00
WhatsApp is cheaper here by 350.00 — because this message is 3 SMS segments, and WhatsApp charges the same no matter how long it is. Add media or more text and SMS climbs further while WhatsApp stays flat.

Important: WhatsApp’s official Business Platform restricts political and electoral use — the flat per-message pricing above applies to Platform senders, who often can’t run campaign content. The free WhatsApp apps and click-to-chat links have no per-message cost but can’t blast a list. Pick the channel your audience and your use case both allow.

Estimates only, and rates are yours to set — SMS and WhatsApp pricing both vary by country, provider and volume. Runs entirely in your browser.

Two very different meters

Understanding how each channel bills you is most of the decision. Cost is only half of it — reach and permission are the other half.

SMSWhatsApp
Billing unitPer 160/70-char segmentPer message / 24h conversation
Length & emojiRaise the costFree
Images, video, voiceNot supported (MMS is separate/pricey)Included
ReachesEvery phone, no appOnly WhatsApp users
Political broadcastsAllowed (with opt-in + registration)Restricted on the Business Platform

The honesty rule

WhatsApp can look dramatically cheaper on paper, but the official platform’s restrictions on political and electoral messaging mean many campaigns simply can’t use it for broadcasts without risking a ban. Price it, but confirm you’re actually allowed to send what you plan to send.

Want to squeeze the SMS side down first? The message cleaner and cost calculator help you keep texts in cheap single segments.

SMS vs WhatsApp FAQ

Why is WhatsApp often cheaper for long messages?
SMS is billed per segment — 160 characters in GSM-7, or 70 if there’s an emoji or curly quote — so a long or media-rich message multiplies in cost. WhatsApp isn’t metered by length: a message (or 24-hour conversation, depending on the pricing model) costs the same whether it’s 20 characters or 900, with an image or without. The longer and richer your message, the more WhatsApp pulls ahead.
Can campaigns actually use WhatsApp for broadcasts?
This is the catch. WhatsApp’s official Business Platform — the only way to message a list at scale — restricts political, electoral and some advocacy use in its terms, and accounts doing it can be banned. The free consumer apps and click-to-chat (wa.me) links have no per-message fee and no political restriction, but they can’t send to a big list at once. So WhatsApp’s pricing advantage is real, but access is the constraint.
When is SMS the better choice?
When the message is short and plain (a GOTV reminder, a shift confirmation), when you need to reach people who don’t use WhatsApp, or when you need a compliant way to broadcast to a US list — SMS’s A2P ecosystem is built for exactly that. Short single-segment texts are where SMS is most cost-competitive.
What price should I enter for WhatsApp?
It depends on the recipient’s country and your provider’s markup. Business-Platform pricing is set per conversation category (marketing, utility, authentication) and per country, so check your provider’s rate card. The default here is a placeholder — replace it with your real number.