- .Net Core
- 11
- May-11-2025
- by Ihsan Ullah
When designing a system that requires real-time updates, the choice between Webhooks and Polling depends on several factors such as timeliness, resource usage, complexity, and scalability. Here’s a comparison to help you choose the right approach:
🔄 Webhooks vs Polling
|
Feature |
Webhooks |
Polling |
|
Definition |
Server sends data to client when an event occurs |
Client repeatedly asks server if there’s new data |
|
Real-Time |
Near real-time (push-based) |
Depends on interval (pull-based) |
|
Network Usage |
Efficient – only active on event |
High – sends frequent requests regardless of changes |
|
Server Load |
Low – triggers only on events |
High – must handle repeated requests |
|
Complexity |
More complex to implement (requires endpoint setup) |
Simpler to implement |
|
Reliability |
May fail if endpoint is down (needs retries/signatures) |
More reliable (client controls request logic) |
|
Security |
Requires validation (e.g., signing payloads) |
Simpler but less efficient if not secured |
|
Scalability |
Better at scale |
Difficult to scale with high frequency |
✅ When to Use Webhooks
- You control the receiver (e.g., your backend API).
- Real-time updates are important.
- You want to reduce unnecessary API calls.
- Your system can handle incoming HTTP requests securely.
Examples:
- Payment confirmations (e.g., Stripe)
- Git events (e.g., GitHub push/pull)
- Chat or messaging notifications
✅ When to Use Polling
- You don’t control the server or it doesn’t support webhooks.
- Simpler setup is preferred or firewall issues prevent inbound traffic.
- Data changes frequently and predictably.
- You need tight control over request logic.
Examples:
- Checking job status in an external system
- Updating feeds where updates are frequent but small
- Systems with short-lived clients like mobile apps
🔁 Hybrid Approach
In some cases, a hybrid approach works best:
- Long polling: Client sends request and server holds the response until there's data.
- Initial webhook, then poll for detailed data.
Final Decision Guidelines
Ask yourself:
- Does the external system support webhooks?
- Is near real-time behavior important?
- Can your infrastructure handle incoming webhook calls?
- Will polling put strain on your servers or APIs?
