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Understanding WhatsApp API Pricing for OTP Verification

Updated
•3 min read
Understanding WhatsApp API Pricing for OTP Verification
M
Muhammad Hassan

With the rise of secure, fast, and reliable communication channels, many businesses are using WhatsApp for OTP (One-Time Passcode) verification. WhatsApp provides an API for this, allowing businesses to send OTPs for account registration, recovery, and security challenges. However, understanding the pricing structure is crucial to managing costs efficiently. Let’s break down the two key pricing models: Conversation-Based and Message-Based pricing.

Conversation-Based Pricing

In WhatsApp’s official pricing model, conversation-based pricing is applied. This method charges based on a 24-hour conversation window.

  • What does it mean? When a business sends an OTP (or any message categorized under "Authentication"), a 24-hour conversation window is initiated. Within this period, any number of messages, including multiple OTP requests, are included under a single charge.

  • Cost Example: In Pakistan, the rate is $0.0228 per conversation. So, even if a customer requests multiple OTPs within the same 24-hour window, you’ll only be charged $0.0228 for that entire interaction.

  • When to use? Conversation-based pricing is ideal when your users are likely to request multiple OTPs within a short period (e.g., during account setup, registration, or recovery processes).

Message-Based Pricing

Some third-party providers or services may offer a message-based pricing model, which charges per message sent.

  • What does it mean? In this model, each OTP message sent to a user incurs a separate charge, regardless of when the messages are sent. This means that if a user requests multiple OTPs, you are charged for each one individually.

  • Cost Example: With a typical rate of $0.005 per message, every OTP request will add to your costs. If a user requests OTPs multiple times, you’ll be charged per message, which could quickly increase expenses.

  • When to use? Message-based pricing might be more suitable for businesses where customers typically request only one OTP in a long period or for use cases where individual charges per message are more manageable.

Comparing the Two Models

  1. Conversation-Based Pricing:

    • Pros: One-time charge covers multiple OTP requests within 24 hours.

    • Cons: Slightly higher base cost for a single OTP message compared to message-based pricing.

    • Best For: Scenarios where users may request multiple OTPs in a short period.

  2. Message-Based Pricing:

    • Pros: Lower per-message cost, especially for one-off OTP requests.

    • Cons: Costs can accumulate if a user requests multiple OTPs.

    • Best For: Occasional OTP requests where users won’t need multiple messages in a short timeframe.

In Both Cases: OTP Delivery on WhatsApp

Whether you choose conversation-based pricing or message-based pricing, the end result is the same: the user will receive their OTP via WhatsApp. The only difference lies in how the business is charged for sending these OTPs.

Final Thoughts: Which Pricing Model is Best?

For most businesses, especially those dealing with frequent user interactions, the conversation-based pricing model tends to be more cost-efficient. It offers a predictable, capped cost over a 24-hour period, making it easier to manage and budget.

However, for smaller operations or businesses where OTP requests are rare, the message-based pricing model might make more sense.

By understanding these pricing models, you can better optimize your OTP verification flow and make informed decisions that balance both cost and customer experience.

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DevOps Journey with M Hassan

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I am writing these blogs because I recently completed a comprehensive DevOps course where I gained in-depth knowledge of the topics mentioned. As I progressed through the course, I realized the importance of having a concise and accessible resource to revise and reinforce my understanding of each topic. Therefore, I decided to create cheat sheets in the form of blog posts. These cheat sheets will not only serve as a handy reference for myself but also benefit others who are also interested in mastering DevOps concepts. By documenting each topic and providing concise explanations, I aim to create a valuable resource that simplifies complex concepts and facilitates hands-on practice. This way, I can solidify my own understanding while helping others on their DevOps journey.