Data Enrichment APIs for Outreach: How to Enrich Leads with Social Data

Your lead list has names and email addresses. Maybe company names too.

That's not enough for personalized outreach.

To write messages that actually get replies, you need context: What do they do? What have they posted recently? What are they working on? What's their company up to?

Manual research answers these questions, but it takes 10-15 minutes per lead. At 50 leads per day, that's a full-time job just gathering information.

Data enrichment APIs solve this problem. You send basic lead info; you get back complete profiles with job titles, company data, social activity, and more. What takes 15 minutes manually happens in seconds via API.

In this guide, I'll break down the enrichment API landscape, compare the best options for different use cases, and show you how to build an enrichment workflow that powers personalized outreach at scale.

What is a Data Enrichment API?

A data enrichment API takes minimal input about a person or company and returns expanded profile data.

Typical input:

Name + company domain
Email address
LinkedIn profile URL
Social media handle

Typical output:

Full name and job title
Company information (size, industry, revenue)
Contact details (verified email, phone number)
Social profiles and recent activity
Engagement metrics

The API cross-references your input against databases of profiles, company records, and social data. It returns whatever matching information it finds.

Common Use Cases

CRM enrichment: Automatically fill in missing fields when new leads enter your system.

Lead scoring: Use enriched data (company size, job title, engagement) to prioritize outreach.

Personalized outreach: Reference specific details from enriched profiles in your messages.

Account research: Get company context before sales calls without manual research.

Types of Enrichment APIs

Not all enrichment APIs serve the same purpose. Understanding the categories helps you choose the right tool.

B2B Contact Enrichment

Focus: Business email addresses, phone numbers, job titles, firmographics

Key players: Apollo.io, ZoomInfo, Lusha, Clearbit, Cognism

Best for: Sales teams doing B2B prospecting

These APIs maintain massive databases of business contacts. You provide a name and company; they return verified contact information and company details.

Pricing ranges from $29/month (Lusha free tier) to $12,000+/year (ZoomInfo enterprise).

LinkedIn Profile Enrichment

Focus: Real-time LinkedIn data (headline, bio, experience, posts)

Key players: Proxycurl, People Data Labs, Kaspr

Best for: Sales, recruiting, and professional outreach

These APIs scrape LinkedIn profiles in real-time or near-real-time. You get current job information, career history, and sometimes recent post activity.

Most B2B enrichment relies heavily on LinkedIn data since it's the most complete source for professional information.

Focus: Instagram, TikTok, YouTube profile and content data

Key players: EnsembleData, ImbueData, Apify, Bright Data

Best for: Influencer marketing and creator outreach

These APIs extract data from social platforms: follower counts, engagement rates, content themes, post history. Essential for brands reaching out to creators. (For a complete guide on DTC influencer outreach, see our ecommerce influencer outreach guide.)

Unlike B2B enrichment, this space is less consolidated. Pricing varies widely based on usage. For a complete guide on turning social profile data into personalized messages, see our social profile personalization guide.

Influencer Databases with APIs

Focus: Creator discovery, audience metrics, verified contact info

Key players: Modash, Influencers Club

Best for: Brands running large-scale influencer programs

These are pre-built databases of millions of creators with search and filter capabilities. They cost more but include curated, verified data.

Pricing starts around $249/month (Influencers Club) and goes up to $16,000+/year (Modash enterprise).

Enrichment vs Personalization APIs

This is an important distinction.

Enrichment API: Takes profile info, returns raw data (name, title, posts, company info).

Personalization API: Takes profile info, returns ready-to-send personalized message.

Feature	Enrichment API	Personalization API
Output	Raw data (JSON)	Ready-to-send message
Use case	CRM, lead scoring, research	Outreach automation
Next step required	Write the message yourself	Send the message
AI layer	None (data only)	Built-in AI generation

When to use enrichment: You want the data for multiple purposes (CRM, scoring, research) and will write messages yourself or use a separate tool.

When to use personalization: You want messages ready to send without building AI infrastructure.

Combined approach: Some tools do both. personalize.marketing extracts profile data (enrichment) and generates personalized messages (personalization) in a single API call.

For more on personalization APIs specifically, see our Personalization API guide.

Quick Comparison: Top Enrichment APIs

API	Data Sources	Platforms	Pricing	Best For
Apollo	Business database	LinkedIn, company	Free tier, $49+/mo	B2B sales
Proxycurl	LinkedIn scraping	LinkedIn only	$49+/mo	LinkedIn data
People Data Labs	3B+ profiles	LinkedIn, social	Free tier, $98+/mo	Large-scale enrichment
EnsembleData	Social scraping	IG, TikTok, YouTube	Contact for pricing	Social media data
ImbueData	Social scraping	IG, TikTok, Twitter	Free tier, custom	Affordable social
Modash	Influencer database	IG, TikTok, YouTube	~$16K+/year	Influencer programs
personalize.marketing	Profile + AI	LinkedIn, IG, TikTok	Free tier + paid	Outreach personalization

How to Choose an Enrichment API

Define Your Data Needs

Different use cases require different data:

B2B sales: Email addresses, phone numbers, job titles, company size, tech stack

Creator outreach: Social profiles, follower counts, content themes, engagement rates

Recruiting: Career history, skills, education, current role

Account-based marketing: Company news, funding, hiring, tech stack changes

Match your data requirements to what each API provides. There's no point paying for B2B email enrichment if you're reaching out to Instagram creators.

Consider Platform Coverage

Where do your prospects live online?

LinkedIn only: Proxycurl, Kaspr, People Data Labs

Instagram + TikTok: EnsembleData, ImbueData, personalize.marketing

All platforms: People Data Labs has broad coverage but limited social depth

If you're doing influencer outreach, you need APIs that actually support Instagram and TikTok. Most B2B enrichment tools don't.

Evaluate Data Quality

Real-time vs cached: Real-time APIs (Proxycurl) fetch current data on each request. Cached databases (Apollo) may be weeks or months old.

Verification: Some APIs verify email deliverability and phone connectivity. Others return unverified data.

Coverage rate: What percentage of your leads will actually match? 60% coverage means 40% of your list comes back empty.

Check Integration Options

REST API: Standard for most tools. Works with any programming language.

Webhooks: Essential for async processing of large batches.

No-code connectors: Zapier, Make, n8n integrations for teams without developers. See our complete outreach automation guide for setup tutorials.

Code examples: Official guides for Python, JavaScript, etc. Nice to have but not essential.

Top B2B Enrichment APIs

Apollo.io

Apollo is the most popular B2B enrichment tool for startups and mid-market companies. (For a complete startup cold email stack, see our startup outreach guide.)

Key features:

275M+ contact database
Email and phone verification
Built-in email sequences and dialer
Chrome extension for LinkedIn

Pricing:

Free: 100 credits/month
Basic: $49/user/month (annual)
Professional: $99/user/month
Organization: $149/user/month

Best for: Sales teams wanting an all-in-one platform with enrichment, sequencing, and calling.

Considerations: The all-in-one approach means you're paying for features you might not need if you just want enrichment.

ZoomInfo

ZoomInfo is the enterprise standard for B2B data.

Key features:

Largest B2B contact database
Intent data and buyer signals
Daily data refreshes
Advanced firmographic filters

Pricing:

Starts at $12,000+/year
Enterprise pricing scales with usage

Best for: Enterprise sales teams with budget for premium data.

Considerations: Expensive. The ROI works for large deals but doesn't make sense for most startups.

Clearbit (Breeze Intelligence)

Clearbit was acquired by HubSpot and is now Breeze Intelligence.

Key features:

Real-time enrichment
Native HubSpot integration
Company and person data
Reveal (identify anonymous website visitors)

Pricing:

$45-900/month via HubSpot
Pricing varies by credits and features

Best for: HubSpot users who want seamless integration.

Considerations: Less useful if you're not on HubSpot. The acquisition has created uncertainty about the product roadmap.

Enrichment + Personalization: The Combined Approach

Here's the gap most teams face:

Enrichment API gives you data: Name, title, recent posts, company info
You still need to write the message: What do you do with all that data?

Writing personalized messages from enriched data requires either manual effort or building your own AI layer. Both are expensive.

How personalize.marketing Works

personalize.marketing combines enrichment and personalization in a single call:

Submit profile URL: LinkedIn, Instagram, or TikTok
API extracts profile data: Name, headline, bio, recent posts, content themes
AI generates personalized message: References specific details from the profile
You receive: Ready-to-send message text + profile metadata

const response = await fetch('https://personalize.marketing/api/v1/personalize-api', {
  method: 'POST',
  headers: {
    'Authorization': `Bearer ${API_KEY}`,
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    profile_url: 'https://www.instagram.com/creator_handle',
    template: `Hey {{first name}},

{{reference to their recent content that relates to skincare}}

Would love to send you our new product to try.`,
    brand_context: 'DTC skincare brand',
    enable_brand_fit_score: true,
    include_profile_report: true
  })
});

Response includes:

personalized_text: Ready-to-send message
brand_fit_score: 1-10 score (if enabled)
profile_report: Profile summary and context (if enabled)

When This Makes Sense

You want messages, not just data: If your goal is outreach, you need messages. Enrichment alone requires additional steps.

You're doing creator/influencer outreach: Instagram and TikTok data is harder to get and harder to personalize. Combined approach handles both.

You need multi-platform support: Most B2B enrichment is LinkedIn-only. personalize.marketing supports LinkedIn, Instagram, and TikTok.

Pricing

Free tier available to get started. See pricing for all plans and rates.

See the API Reference for complete documentation.

Building an Enrichment Workflow

Here's how to implement enrichment in your outreach process:

Step 1: Collect Base Lead Data

Leads come from various sources:

Form submissions: Website signups, demo requests
Event attendees: Webinar registrants, conference contacts
Scraped lists: LinkedIn Sales Navigator exports, creator databases
Inbound: Email replies, social mentions

Minimum data needed: Name + company OR profile URL

The more you have, the better the match rate. An email address alone might get 60% match rate; name + company + LinkedIn URL gets closer to 90%.

Step 2: Enrich via API

Process leads through your enrichment API:

import requests

def enrich_lead(email, name, company):
    response = requests.post(
        "https://api.apollo.io/v1/people/match",
        headers={"Api-Key": API_KEY},
        json={
            "email": email,
            "name": name,
            "organization_name": company
        }
    )
    return response.json()

For efficiency:

Batch requests where the API supports it
Cache results to avoid re-enriching
Handle empty/partial matches gracefully

Step 3: Score and Segment

Use enriched data to prioritize leads:

Company size: Enterprise vs SMB Job title: Decision maker vs individual contributor Engagement: Recent social activity vs dormant Fit: Industry, tech stack, funding stage

Not all leads deserve the same effort. Score them and allocate personalization resources accordingly.

Step 4: Personalize Outreach

Two options:

Manual personalization: Use enriched data to write messages yourself. High quality, low scale.

API personalization: Send enriched data (or just the profile URL) to a personalization API. Get messages back ready to send.

For most teams, the hybrid approach works best: auto-personalize high-volume outreach, manually personalize high-value targets.

Platform-Specific Enrichment Guides

For detailed integration patterns on each platform:

LinkedIn Enrichment API: Extract profile data for sales automation
Instagram Enrichment API: Get creator data for influencer outreach
TikTok Enrichment API: Pull video data for creator partnerships

Each guide covers platform-specific data structures, API options, and integration patterns.

Best Practices for Enrichment APIs

Data Quality

Verify periodically: People change jobs. Emails become invalid. Re-enrich stale records every 3-6 months.

Handle missing fields: Not every profile matches. Build your workflow to handle partial data gracefully.

Don't assume 100% accuracy: Even the best APIs have errors. Spot-check enriched data, especially before high-stakes outreach.

Compliance

GDPR and CCPA: Enrichment providers vary in compliance posture. Cognism emphasizes GDPR compliance. Apollo and ZoomInfo have compliance features but check their current policies.

Data minimization: Only store what you need. Enrichment APIs return lots of data; don't keep fields you won't use.

Consent and purpose: Using enriched data for cold outreach has different legal implications than using it for existing customers. Know your obligations.

Cost Management

Use free tiers: Most APIs offer free credits. Test thoroughly before committing to paid plans.

Batch efficiently: Some APIs charge per request; others per credit regardless of batch size. Optimize for your pricing model.

Cache aggressively: If you might need the same profile twice, cache it. Re-enriching wastes money.

Frequently Asked Questions

What's the difference between enrichment and scraping?

Scraping extracts raw data from websites. Enrichment takes your input (name, email) and returns matched profile data from databases. Some enrichment APIs scrape in real-time (Proxycurl); others query pre-built databases (Apollo). The end result is similar, but the approach differs.

Which API is best for Instagram/TikTok data?

For raw data: EnsembleData or ImbueData. For data + personalized messages: personalize.marketing. Most B2B enrichment APIs (Apollo, ZoomInfo, Clearbit) don't support Instagram or TikTok at all.

How accurate is enriched data?

Varies by provider and data type. Email verification rates are typically 85-95%. Job titles and company data depend on how recently the person updated their profile. Real-time APIs (Proxycurl) are more current than cached databases.

Depends on your jurisdiction, the data, and how you use it. B2B outreach has different rules than B2C. Some providers (Cognism) emphasize GDPR compliance. Consult a lawyer for your specific situation.

What's the minimum data needed to enrich a lead?

Usually name + company or email address. LinkedIn profile URLs work best for LinkedIn enrichment. The more data you provide, the higher the match rate.

Conclusion

Data enrichment APIs turn basic lead information into complete profiles ready for personalized outreach.

For B2B sales prospecting: Apollo, ZoomInfo, or Clearbit. Focus on email verification, phone numbers, and firmographics.

For LinkedIn-focused outreach: Proxycurl or People Data Labs. Real-time profile data with career history and posts.

For Instagram/TikTok creator outreach: EnsembleData, ImbueData, or personalize.marketing. The first two give raw data; personalize.marketing gives data plus ready-to-send messages.

For enrichment + personalization combined: personalize.marketing handles both in a single API call. Submit a profile URL, get back a personalized message and profile metadata.

Ready to try social profile enrichment? personalize.marketing offers a free tier with 200 credits. No credit card required.

For the complete developer integration guide, see our Personalization API guide. For first line generation specifically, see our first line generator comparison.