Webhooks vs Polling: Keeping Your Integrations in Sync Without the Guesswork
The short answer
Use webhooks when you want changes pushed to you the moment they happen, and polling when the other system won't push or when you only need occasional, predictable updates. Most robust integrations end up using a mix of both.
A webhook is the other system phoning you the instant something changes. Polling is you phoning them every few minutes to ask 'anything new?'. Both move the same data; they just differ on timing, cost, and reliability.
For a business owner, the practical question isn't which is technically superior. It's how fresh your data needs to be, and how much it costs to keep it that fresh.
Why this decision matters to your business
Stale data causes real problems: an order that shows 'in stock' after it sold out, a CRM that misses a lead for an hour, a dashboard reporting yesterday's numbers. The sync method behind the scenes is usually the cause.
Webhooks feel instant, which matters for things like payment confirmations, stock levels, or notifications. Customers notice when these lag.
Polling is slower by design, but it's often perfectly adequate. If you reconcile accounting data once a night, real-time delivery buys you nothing and adds complexity you'll pay to maintain.
Where webhooks win, and where they bite
Webhooks win on speed and efficiency. Nothing happens until there's actually something to send, so you're not hammering an API thousands of times a day for no reason.
The honest caveat: webhooks are fragile if built naively. If your endpoint is down when the event fires, the message can be lost. You need retries, a way to verify the sender, and idempotency so a message delivered twice doesn't create two orders.
They also depend entirely on the other party. If a provider's webhooks are unreliable or poorly documented, you inherit that pain. We always build a fallback so a missed webhook doesn't mean permanently missed data.
Where polling still earns its place
Polling wins on simplicity and control. You decide when to check, you're not exposed to the internet waiting for calls, and there's no lost-event problem because you can always re-request.
It's the right choice when a system offers no webhooks, when you only need periodic updates, or when you want a safety net that catches anything webhooks dropped.
The trade-off is waste and latency. Poll too often and you burn API rate limits and server time; poll too rarely and your data goes stale. Getting that interval right is part of the design, not an afterthought.
How we usually build it
In practice we treat webhooks as the fast path and polling as the safety net. Webhooks deliver changes quickly, and a scheduled reconciliation job periodically sweeps for anything missed.
We queue incoming webhook events rather than processing them inline, so a spike in traffic or a slow downstream system doesn't drop data. Every event gets verified and de-duplicated before it touches your database.
This costs a little more up front than a quick-and-dirty script. But it's the difference between an integration you can trust and one that quietly loses orders until someone notices the numbers don't add up.
Not sure which your project needs?
If your systems already talk but the data feels late, patchy, or occasionally wrong, the sync method is often the culprit and it's usually fixable without rebuilding everything.
We design and maintain integrations that stay in sync reliably, with the fallbacks and monitoring that stop small failures becoming big ones.
If you'd like a straight opinion on how your systems should connect, get in touch and we'll talk it through honestly.
Related reading: Why Your Systems Don't Talk to Each Other.
Thinking about this for your business? Contact us.