Transactional SMS Provider for Business Messaging
Send transactional SMS messages instantly and reliably. Selzy is a trusted SMS service provider for order confirmations, real-time alerts, OTPs, and automated business notifications worldwide.
Deliver the Right Message at the Right Moment
Send transactional SMS instantly, triggered by real-time events in your system.
With Selzy, you can send transactional SMS to:
- Confirm orders and notify customers about delivery updates
- Send service quality messages and notifications from your website or CRM system
- Deliver system alerts such as password changes, account blocks, profile updates, subscription expirations, and other important events
- Deliver one-time passwords (OTP) for secure verification
Build lasting relations with the clients
You define the sending logic: whether it’s an order confirmation, appointment reminder, or status update — your system sends a request, and Selzy instantly delivers the message to your customer.
Instant Delivery
Messages are delivered within seconds, which is especially important for OTP codes and urgent notifications. This level of immediacy is difficult to achieve with email or other communication channels.
Higher open rates than email
Users almost always read incoming text messages, especially when they are expecting updates about their orders or transactions. This makes transactional SMS highly effective.
API Send SMS
Easily integrate SMS sending into your systems via API. You define when messages should be sent — your system sends a request, and Selzy ensures fast and reliable delivery every time.
Personalization
Transactional SMS allows you to include individual details such as the recipient’s name, order information, personal codes, and other relevant data, creating a better user experience.
Analytics & Delivery Reports
Track every message you send. See what was delivered, when, and to whom — so you can monitor performance and resolve issues before they impact your customers.
GDPR Compliance
Selzy follows strict data protection standards. Your contact data and message content are used solely for delivery and are never shared with third parties.
Why Selzy?
Reliable SMS Gateway for Global Delivery
Selzy operates as a dependable SMS service provider with direct routes to mobile carriers worldwide. Our infrastructure is purpose-built for business-critical messaging, ensuring:
- High delivery rates across all regions
- Low-latency routing for time-sensitive messages
- Stable performance at any message volume
Send transactional SMS through a platform designed for reliability when it matters most.
SendSms API for Transactional Messaging and Integrations
Selzy’s sendSms API method easily sends transactional SMS from your business systems. Trigger messages with a simple API request — exactly when needed, based on events defined on your side.
Use the API to:
- Send order confirmations, delivery updates, and payment notifications
- Deliver OTP codes for secure verification
- Send alerts and notifications from your CRM, website, or internal systems
Easily integrate SMS sending into your existing infrastructure. You control when messages are sent — Selzy ensures fast, reliable delivery at scale.
A2P Messaging for High-Volume Communication
Selzy supports A2P (Application-to-Person) messaging, making it simple to send transactional SMS at scale. A2P is ideal for:
- Authentication and OTP delivery
- Real-time notifications and system alerts
- Appointment and booking reminders
- Order and account status updates
With A2P messaging, you ensure fast, compliant, and reliable delivery across all your customer touchpoints.
Privacy and Security
We protect your data. All phone numbers and message content processed through Selzy’s transactional SMS service are used exclusively for delivery purposes and are never shared with third parties.
How to Set Up a Transactional SMS Service?
Step 1. Prepare your sending parameters
Define what types of messages you will send, set your sender ID (alpha name), and prepare your SMS templates.
Step 2. Connect the API
Get access to the API and configure message sending using the sendSms method.
You decide when messages should be sent — your system sends a request, and the service delivers the message.
Step 3. Launch sending
Once the integration is complete, you can send messages whenever needed — Selzy ensures fast and reliable delivery at any scale.
Ready to send your first SMS?
See our Pricing Plans
| Armenia | $0.22 |
| Argentina | $0.1 |
| Australia | $0.06 |
| Austria | $0.065 |
| Belgium | $0.1 |
| Brazil | $0.03 |
| Bulgaria | $0.14 |
| Colombia | $0.04 |
| Croatia | $0.11 |
| Cyprus | $0.065 |
| Czech Republic | $0.065 |
| Denmark | $0.055 |
| Egypt | $0.39 |
| France | $0.1 |
| Germany | $0.11 |
| Greece | $0.055 |
| Hungary | $0.8 |
| India | $0.06 |
| Italy | $0.06 |
| Kazakhstan | $0.3 |
| Kenya | $0.235 |
| Latvia | $0.05 |
| Lithuania | $0.05 |
| Mexico | $0.02 |
| Montenegro | $0.16 |
| Netherland | $0.1 |
| Norway | $0.06 |
| Poland | $0.03 |
| Portugal | $0.035 |
| Romania | $0.065 |
| Slovakia | $0.06 |
| Slovenia | $0.25 |
| Spain | $0.05 |
| Sweden | $0.06 |
| Turkey | $0.11 |
| Uzbekistan | $0.41 |
50,000+ customers can't be wrong...
Selzy is the easiest way to start selling with email — but don’t just take our word for it.
Read our customers’ success stories and see what they have to say 👉
“A true gem we discovered in a huge pile of email marketing software. Way more affordable than those big known brands, and it outperforms them! All we need for full blown email marketing campaigns.”
“The overview dashboard is something I really love, because of how easy it is to understand and the summary statistics of my overall opens, clicks and unsubscribe. The support desk is really great and quick to respond.”
“I sent the first (test) campaign in less than 5 minutes. How did Selzy get me? Pleasant dashboard, clear statistics, including the deliverability of emails from the campaign, send an email to contacts who haven't opened the message (with one click), simple import of contacts”
“Great buy! The builder covers everything, I was looking at the large array of design templates. The UX/UI is just smooth. Selzy makes Mailchimp look pale in comparison.”
“The best thing about Selzy is its ability to manage marketing emails with fantastic templates, simplifying the process.”
“Not kidding. Selzy is really good. their support is beyond excellent. Response time is less than 5 minutes. They staff is skilled. The ux/ui is amazing. I highly recommend everyone to use it. This company really knows what they are doing! In fact, this is one of the best LTD's I've bought in a while.”
“Selzy is cost effective to the max and it makes it clear how my list health is going. Also top of the line support. We are talking minutes no matter what time I pinged the chat.”
“I have been extremely satisfied with Selzy and would highly recommend it to anyone looking for a reliable and user-friendly email campaign management tool. The analytics and reporting tools are top-notch, providing detailed insights into the performance of my campaigns.”
“Great UI, super easy to use and navigate around. I really love the ease of use and the amazing and attractive templates it has that makes it so simple.”
“Create email campaigns super fast, and having my email list on different categories is awesome. Been using Selzy a lot, no complaints at all.”
“Instead of opting for larger platforms like Mailchimp or Constant Contact, which offer an abundance of unnecessary features and complex interfaces, I desired a more straightforward solution focused on email sending. After comparing various email marketing platforms like Sender, Sendpulse, and Mailerlite, I ultimately chose Selzy.”
“I can run a campaign easily. It’s an alternative solution to the CRM+Email marketing tool I use on a daily basis.”
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FAQ
What is transactional SMS?
A transactional SMS is a text message that notifies a customer about their interaction with an online store or any other service provider. For example, an order confirmation:
“Thanks for your order, Anna! Order #1234 is confirmed.”
What is the difference between transactional and promotional SMS?
Promotional messages contain commercial content. They inform users about a product or service, including updates. The goal of such messages is to support the company’s marketing strategy, increase sales, and convert subscribers into customers.
Transactional messages, on the other hand, are triggered by user actions. Their purpose is to promptly provide important information related to the user’s activities. These messages help build customer loyalty and increase engagement with the brand.
Is OTP considered transactional SMS?
Yes, OTP (One-Time Password) messages are considered transactional SMS. They are sent in response to a user action — such as logging in, confirming a payment, or updating account details — and are essential for security and verification.
Do I need user consent to send transactional SMS?
Yes, user consent is required, but it differs from consent for promotional messages. For transactional messages, it is sufficient to obtain consent for personal data processing and service-related notifications. A separate opt-in for marketing messages is not required. However, it is important to inform users in advance that they will receive such SMS and to record their consent (for example, during registration or checkout).
What are common use cases for transactional SMS?
Transactional SMS includes order confirmations, delivery notifications, appointment reminders, account alerts (such as password changes or login activity), and one-time passwords (OTP) for verification. These messages help keep users informed in real time and are not intended for marketing or promotional purposes.
Do I need user's permission to send transactional SMS?
Yes, you need the user’s permission — but it’s not the same kind of permission you’d need for promotional messages. For transactional messages, it’s enough if the user has agreed to let you process their personal data and send them service-related notifications. You don’t need a separate opt-in for marketing. It’s important to let users know upfront that they’ll be getting these SMS, and to keep a record of their agreement — for example, when they sign up or place an order.
What are common use cases for transactional SMS?
Transactional notifications are client-initiated messages sent after the user performs specific actions. These are primarily payment confirmations, order placements, or service bookings.
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