Bulk SMS questions, answered

SendBulkSMS is a bulk SMS service for sending text message campaigns and API messages to 227 countries, charged per message from $0.00259 with no monthly fee. You send from a web console or from your own software through the REST API.

Bulk SMS means sending the same text message, or a personalised version of it, to many mobile numbers at once. Businesses use it for promotions, reminders, verification codes, delivery updates and service notices because SMS reaches any mobile phone without an app or internet connection.

Shops and online stores, clinics and salons, schools, delivery and logistics firms, banks and lenders, event organisers, app developers and marketing agencies. Anyone who needs to reach a list of customers quickly and reliably can use it.

227 countries and territories in 9 regions. The countries page lists every one with its rate, and each country has a page with the number format and sending tips.

No. The console runs in any modern browser on a computer or phone. Developers who want to send from their own systems use the REST API over HTTPS with any programming language.

Sign in, open New campaign, paste numbers or upload a CSV, write your message, check the preview and the estimate per country, then send now or pick a time. Reports appear in Campaigns as messages are delivered.

International format: the country calling code first, then the number without its national 0. For example +44 7700 900123 for the UK. A leading 00 instead of + is fine, and spaces, dashes and brackets are removed automatically.

Up to 20,000 in the console and 10,000 per API request. For larger lists, split them into several campaigns; each one is priced and reported on its own.

Put extra columns after the number in your list, for example +447700900123, Sam, 14:30. Write {{1}} in the text for the first extra column, {{2}} for the second, and each recipient receives their own values. The preview shows the message with any recipient's values.

Up to 10 segments: 1,530 characters in GSM-7 or 670 in UCS-2. Each segment is charged separately, so most campaigns stay at one segment of 160 Latin characters or 70 characters in other alphabets.

One character outside the GSM-7 set, such as an emoji, a curly quote, an Arabic or Cyrillic letter, or letters like á, ç or ł, makes the whole message use UCS-2. The counter lists the characters that caused it, so you can replace them if you want to stay at 160.

Yes, from 5 minutes to 60 days ahead. The cost is reserved when you schedule, the campaign starts on time by itself, and you can cancel it before it starts for a full refund.

Yes. The test option sends the exact message to one number you enter, charged at that country's rate like any message. It appears in your campaign list marked as a test.

Campaigns are queued as soon as you confirm and leave at up to 200 messages a minute per queue. Most delivery reports arrive within seconds of sending.

Yes. Save your opt-out wording in Settings, for example a phone number or link where people can ask you to stop, then tick the opt-out option and it is added on a new line. Replies to messages are not received, so the wording points people to your own contact. Numbers you put on your do-not-send list are never messaged. It counts toward the message length, and the estimate includes it.

Every recipient has a status line: queued, sent, delivered or failed, with the time of each step. Open a campaign to see them, or receive them at your webhook URL if you send through the API.

Common reasons are a switched-off or unreachable phone, a number that no longer exists, or a destination network that rejects the message. The reason is shown on the report and the message is refunded.

Messages are sent one way, from a number chosen for each route. For replies, give recipients a link, a phone number or an email address in the text.

Messages are sent from route numbers that can differ by country and by send. Put your business name at the start of the message so recipients know who wrote.