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Should I message my customers by SMS or WhatsApp Business?
Use WhatsApp Business if your customers already message you there. Use SMS if you need to reach everyone: SMS works on every phone, with no app or internet needed, and customers can reply to the number they already have saved. DroidSender sends SMS from your own Android phone and number, with campaigns from Excel and one inbox on your computer.
Where WhatsApp Business is better
- The app is free to download.
- Several people at once: one phone and up to 4 linked devices, or up to 10 with a paid Meta Verified plan.
- Photos, videos and voice messages, with read receipts.
Where SMS is better
- It reaches everyone. SMS works on every mobile phone, with no app and no internet connection, while WhatsApp needs both people to have it installed and to be online.
- Reminders arrive as a normal text, also for customers who don't use WhatsApp.
- One number for calls and messages: with DroidSender the texts come from your own SIM, so customers reply to and call the number they already have saved.
Many businesses use both
WhatsApp for the customers who already write to you there, and SMS for reminders and for everyone who doesn't use it. DroidSender handles the SMS side; it does not send WhatsApp messages.
Costs and rules
- WhatsApp Business app: free to download.
- WhatsApp Business Platform (the API): Meta charges for each delivered message, with 1,000 free service messages a month per business number. Outside the 24 hours after a customer writes to you, only pre-approved templates can be sent.
- WhatsApp's Business Policy, for the app and the Platform: you may only contact people who gave you their number and agreed to receive messages from you.
- DroidSender: no fee per message, and the SMS go through your mobile plan. Try it free: 1,000 SMS in your first 30 days, then 100 a month. No card needed.
SMS has its own rules for marketing. Is it legal to send bulk SMS from my own number?
Side by side
| Feature | SMS with DroidSender | WhatsApp Business |
|---|---|---|
| Who it reaches | Every mobile phone, with no app or internet | People with WhatsApp installed and online |
| Price | No fee per message. Try it free: 1,000 SMS in your first 30 days, then 100 a month. No card needed. | App free to download. The Platform charges per delivered message, with 1,000 free service messages a month |
| Several people at once | The same Google account on as many computers as you need | One phone and 4 linked devices, up to 10 with Meta Verified |
| Photos and voice | No, text only | Yes |
| Read receipts | Delivery reports, no read receipts | Yes |
| Number | Your own SIM's number, the same for calls | The number registered on WhatsApp Business |
| Campaigns from a spreadsheet | Yes, from Excel or CSV | Not in the app |
Checked November 2026
WhatsApp Business is free to download: faq.whatsapp.com/641572844337957
Linked devices on the Business app: faq.whatsapp.com/647349420360876
Up to 10 devices with Meta Verified: faq.whatsapp.com/395911122612120
Both people need WhatsApp and an internet connection: faq.whatsapp.com: about sending messages
Platform pricing and the free service messages: developers.facebook.com/docs/whatsapp/pricing
The 24-hour customer service window: developers.facebook.com: send messages
Who a business may contact: whatsappbusiness.com/policy
Prices in USD or EUR before tax, as published by each service. If something has changed, write to hello@droidsender.com and we will correct it.
Short answers
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Can DroidSender send WhatsApp messages?
No. DroidSender sends and receives SMS through your own Android phone. Many businesses use WhatsApp for customers who already use it and SMS for reminders and everyone else.
Is WhatsApp Business free?
The app is free to download. The WhatsApp Business Platform, used through the API, charges for each delivered message, with 1,000 free service messages a month per business number.
Can my team answer together?
On WhatsApp Business, one phone and up to 4 linked devices, or up to 10 with Meta Verified. On DroidSender, everyone signs in with the same Google account on as many computers as you need, but the inbox doesn't show who wrote each reply.
Start today, with your own number.
Connect your Android phone to send campaigns and answer customers from your computer. Your customers keep reaching you on the number they know.
Try it free: 1,000 SMS in your first 30 days, then 100 a month. No card needed.
