Definition
A webhook is an automated HTTP callback that sends data from one application to another in real time when a specific event occurs. Instead of your system repeatedly asking “did anything happen?” (polling), the source system pushes data to your endpoint the moment something changes. In the context of B2B tools, webhooks are how visitor identification data, CRM updates, payment events, and other signals flow between systems instantly - without manual exports, scheduled syncs, or anyone checking a dashboard.
How It Works
A webhook follows a simple pattern: event happens, data is sent. Here is the flow in practice.
First, you register a webhook URL with the source application. This is an endpoint on your server (or a tool like Zapier, Make, or a custom Lambda function) that is ready to receive data. You tell the source: “When X happens, send the data here.”
When the triggering event occurs - a new visitor is identified, a form is submitted, a deal stage changes - the source application makes an HTTP POST request to your webhook URL. The request body contains a JSON payload with all the relevant data about the event.
Your receiving system processes the payload and takes action. That action might be creating a record in your CRM, sending a Slack notification, adding a contact to an email sequence, updating a data warehouse, or triggering a downstream workflow.
The key advantage over polling (repeatedly checking for updates via API calls) is efficiency and speed. Polling requires constant requests, most of which return nothing new. Webhooks only fire when there is actual data to send, and they deliver it in near real-time - typically within seconds of the triggering event.
For visitor identification tools, webhooks are how identified visitor data reaches your stack. When Leadpipe identifies a visitor, a webhook can instantly push that person’s name, email, company, page views, and intent signals to your CRM, Slack channel, or automation platform. The alternative - logging into a dashboard to check for new visitors - does not scale.
Why It Matters
Webhooks are the connective tissue of modern B2B data stacks. Without them, data sits in silos. Your visitor identification tool knows who visited, but your CRM does not. Your payment processor knows who upgraded, but your customer success platform does not. Webhooks solve this by moving data between systems automatically, in real time.
For sales teams, webhook speed translates directly to revenue. Research shows that responding to a lead within 5 minutes is 21x more effective than responding after 30 minutes. Webhooks make sub-minute response possible - a visitor is identified, the webhook fires, a Slack alert pops up, and the SDR calls within minutes.
For RevOps teams, webhooks are how you build event-driven architectures. Instead of batch-processing data overnight, every system in your stack stays current because data flows the moment it is created. This enables real-time lead scoring, instant routing, and up-to-the-minute reporting.
Examples
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Visitor-to-Slack alert: A SaaS company configures a webhook from their visitor identification tool to Slack. When a visitor from a target account views the pricing page, a Slack notification appears in the #sales-alerts channel with the visitor’s name, company, title, and pages viewed. The assigned SDR sees it and calls within 3 minutes.
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CRM auto-creation: A webhook pushes every identified website visitor into HubSpot as a new contact, tagged with the source “Website Visitor ID” and enriched with company data. The CRM’s lead scoring model automatically evaluates ICP fit and routes high-scoring leads to the appropriate sales rep.
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Data warehouse streaming: A RevOps team sends webhook payloads to a Snowflake staging table via an AWS Lambda function. Every identified visitor event is logged with a timestamp, enabling time-series analysis of visitor trends, match rates, and conversion patterns.
Related Concepts
| Concept | Description | Learn More |
|---|---|---|
| Visitor Identification | The event source that triggers visitor data webhooks | What Is Visitor Identification? |
| Data Enrichment | The process webhooks often trigger downstream | What Is Data Enrichment? |
| Identity Graph | The data source queried before webhook payloads are assembled | What Is an Identity Graph? |
| ABM | Account-based workflows often orchestrated via webhooks | What Is ABM? |
| Lead Generation | The broader process webhooks accelerate | What Is Lead Generation? |
