Opt-outs are a standard part of SMS compliance: contacts must be able to stop messages at any time. If you use Twilio with RapidPro.app, Twilio automatically handles opt-out and opt-in keywords, and RapidPro.app reflects those opt-outs so you don’t accidentally keep messaging someone who has stopped. This guide explains what Twilio blocks, how RapidPro.app updates the contact status, and how to troubleshoot common delivery issues (including Twilio error 21610).
Voice (IVR) flows require a voice-enabled phone number connected to your workspace. If you’re using Vonage, you can purchase a virtual number with Voice capability in the Vonage dashboard, then connect it to RapidPro.app as a channel. This guide shows how to set up the number, connect your Vonage account, and troubleshoot common setup issues.
Introduction: Need a channel to temporarily stop sending messages to contacts? In RapidPro.app, you can disable a channel without removing it. Disabling keeps the channel’s configuration and history, while preventing it from being used for new outgoing messages. 4–6 min read Channels Updated on: 22/12/2025 Disable a channel safely (without deleting it) If you just […]
By default, a channel’s phone number may allow sending messages to international numbers, which can quickly increase carrier or aggregator fees. To control costs, you can restrict international sending on a per-channel basis. This guide shows where to find the setting, how to disable it, and what to check if international messages start failing.
A Telegram channel connects your RapidPro.app workspace to Telegram, a fast, free, cloud-based messaging platform. In RapidPro.app, your Telegram channel is represented by a Telegram Bot, which is the interface between Telegram’s API and your flows. This article explains why Telegram is a strong option for testing or production, how Telegram bots work, and what to expect when sending at scale.
To send and receive SMS through Twilio, you need a Twilio account, a phone number with the right capabilities, and a Twilio channel connected to your RapidPro.app workspace. This guide walks you through buying a number, connecting it correctly, and troubleshooting the most common Twilio delivery and compliance errors.
When you need to send SMS at scale, relying on a single Twilio number can limit throughput and consistency. A Twilio Messaging Service lets you pool multiple numbers under one service and connect that service to a single RapidPro.app channel—unlocking features like smart sender selection, encoding support, and more reliable carrier formatting.
Twilio two-way SMS lets you send and receive text messages on the same number, enabling real conversations with contacts. Availability varies by country and can change over time, so use this list as a starting point and confirm requirements in Twilio’s SMS Guidelines before you launch.
A Telegram channel lets your RapidPro.app workspace send and receive messages through a Telegram Bot. To connect Telegram, you’ll create a bot in Telegram (via BotFather), copy the bot token, and paste it into RapidPro.app when adding a new channel. This guide walks you through setup, testing, and the key Telegram rule to keep in mind: contacts must message your bot first (usually with /start) before you can message them.
Introduction: Channels are how your RapidPro.app workspace sends and receives messages (and, for some providers, phone calls). Without at least one connected channel, your flows can’t deliver messages to contacts. This article explains what channels are, the main channel types you can connect, and key limits to keep in mind. 6–9 min read Channels Updated […]
