What types of lead data can AlterLab extract?

AlterLab can extract any publicly available data: business names, addresses, phone numbers, email addresses (when publicly listed), LinkedIn profiles, company descriptions, employee counts, industries, and social media handles. The structured JSON output format makes it easy to import directly into your CRM.

Can AlterLab scrape LinkedIn for lead generation?

AlterLab can access LinkedIn public profiles and company pages. LinkedIn uses aggressive bot detection — AlterLab's residential proxy and stealth browser tier handles this. Note that LinkedIn's Terms of Service restrict automated access to private data. Only scrape data that is publicly visible without authentication.

How do I get structured JSON output for CRM import?

Include `"formats": ["json"]` in your API request. AlterLab extracts structured data from JSON-LD, microdata, and hCard markup when available. For custom extraction, use `"formats": ["html"]` and parse with your preferred library, or use `"formats": ["markdown"]` for LLM-based extraction.

What business directories can I scrape for leads?

AlterLab works with any publicly accessible directory: Google Maps (business listings), Yelp, Clutch, G2, Yellow Pages, industry associations, government contractor databases (SAM.gov, USASpending.gov), and niche vertical directories. Static directories use Tier 1 ($0.0002), JavaScript-rendered ones use Tier 4 ($0.004).

Is web scraping for lead generation legal?

Scraping publicly available business information is generally permitted under US law (confirmed in hiQ v. LinkedIn, 2022). However, laws vary by jurisdiction, and you must comply with the site's robots.txt where legally required. Never scrape data protected behind authentication, and ensure your use complies with GDPR, CCPA, and CAN-SPAM when contacting extracted leads.

How do I enrich existing leads with additional data?

Use the batch endpoint to process your existing lead list. Submit company websites or LinkedIn URLs, and extract additional data points — company size, technology stack (from job postings), recent news, or contact information. This enrichment pattern is common for sales teams augmenting CRM records.

contact data extractioncompany profile scrapingCRM data collection

Lead Generation API

Extract contact data, company profiles, and prospect information from any publicly accessible source. Structured JSON output ready for direct CRM import. AlterLab handles anti-bot protection automatically — directories, LinkedIn, industry databases, all covered. From $0.0002/request.

Start Free — 5,000 Scrapes Documentation

No credit card

SOC 2 aligned

99.9% uptime

Simple Pricing

One dollar

5,000

Requests

Pay as you go

No subscriptions

Never expires

2,847,653+

Requests processed this week

Extract Lead Data in One API Call

Submit company URLs, get structured contact data back in JSON.

extract_lead.py

import requests

# Extract company contact info
response = requests.post(
    "https://api.alterlab.io/v1/scrape",
    headers={"X-API-Key": api_key},
    json={
        "url": "https://example.com/contact",
        "formats": ["json", "markdown"],
    }
)

data = response.json()["data"]
# data["json"], data["markdown"]

enrich_crm.js

// Bulk enrich CRM records
const response = await fetch(
  "https://api.alterlab.io/v1/batch",
  {
    method: "POST",
    headers: { "X-API-Key": apiKey },
    body: JSON.stringify({
      urls: companyWebsites,
      formats: ["json"],
    })
  }
);

Building a Lead Generation Pipeline

From raw directory URLs to CRM-ready records in four steps.

Identify Lead Sources

Start with publicly accessible directories relevant to your target market: Google Maps for local businesses, Clutch or G2 for software companies, industry associations, government contractor databases, or LinkedIn company pages. AlterLab handles any publicly accessible site without per-source configuration.

Extract Structured Contact Data

Request JSON output for structured extraction from schema markup, or HTML for custom CSS selector parsing. For inconsistent page layouts — common in directory listings — request markdown output and use an LLM to extract fields like name, email, phone, and title. AlterLab's markdown is clean and token-efficient.

Normalize and Deduplicate

Apply normalization before storage: standardize phone formats, validate email addresses, extract domain from URLs for deduplication. Use the company domain as your deduplication key when emailing or calling — it's more reliable than name matching across different data sources.

Import into Your CRM

Push normalized records to Salesforce, HubSpot, Pipedrive, or any CRM via API. For continuous enrichment, set up a scheduled batch job that checks company websites weekly and updates CRM records with new data — headcount, job openings, technology signals — without manual research.

Lead Generation Use Cases

What sales and marketing teams build with AlterLab.

Outbound Prospecting Lists

Build targeted prospect lists from industry directories, conference attendee pages, and company websites. Filter by size, location, and technology stack.

CRM Enrichment

Automatically enrich existing CRM records with fresh data: updated contact info, company headcount, recent funding rounds, and job openings.

Intent Signal Monitoring

Track job postings, press releases, and technology changes at target accounts. Trigger outreach when a company signals buying intent.

Competitive Intelligence

Monitor which companies are hiring for specific roles — a signal of technology adoption, expansion, or strategic shifts relevant to your sales motion.

Event Lead Lists

Extract attendee and speaker lists from conference websites, meetup pages, and industry event directories before or after the event.

Partner & Reseller Discovery

Find potential partners, resellers, or integration partners from marketplace directories, G2 listings, and software ecosystem pages.

Ethical & Legal Compliance

AlterLab provides infrastructure for extracting publicly available data. Users are responsible for ensuring their use case complies with applicable laws — including GDPR, CCPA, CAN-SPAM, and any site-specific terms of service. Only collect data that is publicly accessible without authentication. When contacting extracted leads, comply with opt-out and consent requirements in your jurisdiction.