Key takeaways
- A2P means messages sent automatically by an application to a person’s phone or messaging app.
- It differs from P2P, which is person-to-person texting.
- SMS is the classic A2P channel. RCS and chat apps add rich, interactive options.
- Consent, sender identity and local rules vary by country.
A2P versus P2P
P2P (person-to-person) messaging is what you do when you text a friend. A2P messaging is sent by an application, often to many recipients, usually through a messaging provider with connections to mobile networks.
Because it is automated and can be high-volume, operators treat A2P traffic differently from P2P. They often apply separate rules, registration requirements and pricing.
Common A2P use cases
- One-time passcodes and verification codes
- Order, shipping and booking notifications
- Appointment reminders
- Account and security alerts
- Promotions to customers who have opted in
- Customer service conversations
Channels used for A2P
SMS is the most widely reachable channel because it works on virtually every mobile phone. Rich channels such as RCS, WhatsApp Business, Viber and Apple Messages for Business add images, buttons and branded identity where they are supported. Email, voice and push notifications complement them.
What affects delivery
- Routes and operator connections
- Sender identity (a SenderID or a phone number) and local registration rules
- Message content and consent
- Number quality and validity
What to look for in a provider
These are the essentials; our buyer’s guide has a fuller checklist.
- Reliable delivery, with failover when a network has problems
- Transparent pricing without hidden fees
- Support for the channels you need in your destination countries
- Analytics and delivery reporting
- Responsive support
How ZafeConnect fits
ZafeConnect provides A2P SMS, RCS and iMessage, email, chat apps and a CPaaS platform for enterprise customers, with a message delivery rate of over 98%, failover systems, analytics included and pay-per-delivered-message pricing.