SYSTEM all green source hunter.io queue 18,492 domains p99 latency 218ms dataflirt.com · scraper/hunter-io
RUN * 114 active pipelines * hunter.io live

B2B contact data,
at warehouse scale.

We extract domain search results, email patterns, professional profiles, and author mappings from Hunter.io. Delivered as clean JSON, CSV, or Parquet to S3, BigQuery, or Snowflake on your cadence.

Domains processed
142K /day
Emails extracted
1.8M /24h
Verification checks
412K /run
Active pipelines
114
Uptime
99.94%
Data Dictionary

Every field we extract from hunter.io

Structured, schema-consistent data across all major object types — delivered clean, typed, and ready to query.

Complete list of extractable fields for Domain Search objects from hunter.io. All fields typed and schema-versioned.

domainorganization_nameindustryheadcountcountrypatterngeneric_emailspersonal_emailstotal_emailsscraped_at
domain_search
● 200 OK
"domain": "stripe.com",
"organization_name": "Stripe",
"industry": "Financial Services",
"pattern": "{first}.{last}@stripe.com",
"total_emails": 4892,
"generic_emails": 45,
"personal_emails": 4847,
"scraped_at": "2026-05-12T09:14:00Z"
# domainorganization_nameindustryheadcountcountrypattern
1
2
3

Complete list of extractable fields for Professional Profiles objects from hunter.io. All fields typed and schema-versioned.

emailfirst_namelast_namepositiondepartmentlinkedin_urltwitter_urlphone_numberconfidence_scoreverification_status
professional_profiles
● 200 OK
"email": "j.doe@stripe.com",
"first_name": "John",
"last_name": "Doe",
"position": "Senior Software Engineer",
"department": "Engineering",
"linkedin_url": "linkedin.com/in/johndoe",
"confidence_score": 98,
"verification_status": "valid"
# emailfirst_namelast_namepositiondepartmentlinkedin_url
1
2
3

Complete list of extractable fields for Email Verification objects from hunter.io. All fields typed and schema-versioned.

emailstatusresultscoreregexp_validgibberishdisposablewebmailmx_recordssmtp_serversmtp_check
email_verification
● 200 OK
"email": "contact@stripe.com",
"status": "valid",
"score": 100,
"regexp_valid": true,
"disposable": false,
"webmail": false,
"mx_records": true,
"smtp_check": true
# emailstatusresultscoreregexp_validgibberish
1
2
3

Complete list of extractable fields for Author Finder objects from hunter.io. All fields typed and schema-versioned.

article_urlauthor_nameemaildomainconfidencetwitter_handlelinkedin_urlpublished_datepublication_name
author_finder
● 200 OK
"article_url": "techcrunch.com/article-123",
"author_name": "Jane Smith",
"email": "jane@techcrunch.com",
"domain": "techcrunch.com",
"confidence": 94,
"twitter_handle": "@janesmith",
"publication_name": "TechCrunch"
# article_urlauthor_nameemaildomainconfidencetwitter_handle
1
2
3

Complete list of extractable fields for Company Metadata objects from hunter.io. All fields typed and schema-versioned.

domaincompany_namedescriptionlogo_urlfacebook_urlinstagram_urlyoutube_urlphysical_addressfounding_yeartechnologies_used
company_metadata
● 200 OK
"domain": "stripe.com",
"company_name": "Stripe",
"description": "Financial infrastructure platform for the internet.",
"physical_address": "South San Francisco, California",
"founding_year": 2010,
"technologies_used": "['React', 'Ruby', 'PostgreSQL']"
# domaincompany_namedescriptionlogo_urlfacebook_urlinstagram_url
1
2
3

Capabilities

Extract B2B contact intelligence at scale

Our Hunter.io scraper captures domain-level patterns, professional profiles, and verification statuses. We manage rate limits, IP bans, and pagination to deliver structured contact data.

Domain Search Extraction

Extract total email counts, generic vs personal email ratios, and primary email patterns for any target domain.

Professional Profile Mapping

Capture first name, last name, position, department, and associated social media links for discovered email addresses.

Verification Status Capture

Record confidence scores, MX record checks, and SMTP verification results for individual email targets.

Author Finder Scraping

Map article URLs to author names and verified email addresses across digital publications and blogs.

Department Categorisation

Filter and extract contacts by department categories like Engineering, Marketing, Sales, or Executive leadership.

Social Link Extraction

Extract LinkedIn and Twitter profile URLs associated with professional email addresses.

Confidence Score Tracking

Log Hunter.io confidence scores to filter out low-probability contact vectors before downstream CRM ingestion.

Pagination Handling

Navigate deep domain results automatically to extract the full catalogue of available contacts, not just the first page.

Rate Limit Management

Distribute requests across residential proxy pools to avoid IP bans and strict API throttling mechanisms.

// engagement pipeline

From domain list to warehouse record

Brief in. Clean data out.

Define Scope
d 0

Provide domain lists, company names, or article URLs. We design the extraction schema together.

Pipeline Build
d 2–4

We configure Scrapy crawlers, proxy rotation, session management, and CAPTCHA handling for hunter.io.

Validation & QA
d 4–6

Schema validation, null-rate checks, and sample contact verification before full launch.

Delivery
ongoing

JSON / CSV / Parquet pushed to your S3 bucket, BigQuery dataset, or Snowflake stage on agreed cadence.

Under the hood

How our Hunter.io pipeline handles the hard parts

Contact databases invest heavily in scraping detection. Here is how we stay resilient.

pipeline-monitor · hunter.io · live ● active
// fingerprinting
Identity rotation
TLS fingerprintrandomised
User-agentrotated
IP poolresidential
Challenges blocked0
// pagination
Page coverage
48,291 pages queued running
// observability
Pipeline health
99.9%
uptime
142ms
p99 lat
0.3%
null rate
2
alerts
Anti-bot layer
Cloudflare bypass and fingerprint spoofing

Hunter.io uses strict bot mitigation. Our crawlers use residential ISP proxies with realistic browser fingerprints and full cookie session management to bypass Cloudflare challenges.

Rate limiting
Distributed request architecture

Strict IP tracking blocks aggressive extraction. We distribute requests across thousands of residential IPs with randomised timing delays to mimic organic user search patterns.

Dynamic DOM
JavaScript hydration handling

Search results load dynamically via JavaScript. We use Playwright to execute client-side rendering, ensuring we capture data that headless HTTP clients miss.

Pagination limits
Deep extraction routing

Extracting thousands of contacts from large domains requires complex state management. Our pipeline maintains session continuity across deep pagination layers.

Change detection
Only re-scrape what has changed

For large domain lists, we maintain a hash index of last-seen values. Subsequent runs only push diffs, reducing compute cost and downstream processing load.

Applications

Who uses Hunter.io data

Teams across industries use hunter.io data to build competitive products and smarter operations.

01
B2B Lead Generation

Sales teams extract domain-specific contact lists to build targeted outbound email campaigns.

02
CRM Enrichment

Revenue operations teams enrich existing account records with verified email patterns and department contacts.

03
Competitor Employee Mapping

HR and recruitment teams map organisational structures and headcounts based on extracted professional profiles.

04
Academic Research

Researchers extract author contact information from digital publications to conduct surveys and interviews.

05
PR & Outreach Campaigns

Marketing teams build media lists by extracting journalist and editor emails via the Author Finder.

06
Identity Verification

Security teams use email patterns and confidence scores to verify user identities during onboarding.

Why DataFlirt

"Hunter.io aggregates professional contact data across millions of domains, but extracting that graph at scale requires bypassing strict rate limits and bot protections."

Most teams underestimate the investment required: reliable Hunter.io extraction requires residential proxies, session token management, CAPTCHA handling, and daily selector maintenance. DataFlirt absorbs that complexity so your engineers can focus on the analysis, not the infrastructure.

Technical Spec

Hunter.io scraper technical capabilities

Everything supported by our hunter.io scraper — rendered SPA elements, auth walls, rate-limit evasion and beyond.

JavaScript rendering
Full Playwright sessions required for dynamic search result hydration
Supported
CAPTCHA bypass
Automated CapSolver integration for bot challenges
Supported
Residential proxy rotation
ISP-grade residential IPs rotated per request to avoid rate limits
Supported
Domain pattern extraction
Capture primary email formats for target organisations
Supported
Confidence score capture
Extract probability metrics for individual email addresses
Supported
Author finder mapping
Map article URLs to author email addresses
Supported
Department filtering
Categorise extracted contacts by organisational department
Supported
Saved lead lists
Requires authenticated user session and account access
Partial
Account billing details
Private user account data is strictly out of scope
Partial
Infrastructure

Infrastructure powering the Hunter.io pipeline

Open-source tooling on proven cloud infra — no vendor lock-in, full observability.

ScrapyPlaywrightPython 3.12RedisPostgreSQLApache AirflowAWS LambdaS3CloudWatch2CaptchaCapSolverResidential ProxiesDockerKubernetesGrafanaPrometheus
Scrapy + Playwright Stack

Scrapy handles crawl orchestration and retry logic. Playwright handles JavaScript rendering and interaction flows.

Residential Proxy Infrastructure

We maintain pools of residential ISP proxies. Rotation happens per-request to prevent rate limit triggers.

Cloud-Native Orchestration

Pipelines run on AWS Lambda and ECS. Airflow handles scheduling, dependency management, and SLA alerting.

Output & Delivery

Your data, your destination

Data delivered to where your team already works — no new tooling required.

JSON
Newline-delimited or nested schema
CSV
Flat file with typed columns
XLS
Excel compatible format for business teams
Parquet
Columnar format for data warehouses
AWS S3
Direct bucket delivery
Webhook
HTTP POST per record for real-time processing
API
Queryable endpoint for extracted data
PostgreSQL
Upsert into your existing schema
BigQuery
Streamed directly into your dataset
Snowflake
Stage and COPY INTO workflow
S3
Direct bucket delivery — compatible with any data lake
// faq

Common questions.

About hunter.io scraping, legality, and pipeline operations.

Ask us directly →
Is scraping Hunter.io legal?

Scraping publicly available professional data is generally permissible. DataFlirt targets only public domain search results and unauthenticated profile data. We do not circumvent authentication walls to access private lead lists. Clients should consult legal counsel for specific GDPR and CCPA compliance regarding B2B contact data usage.

How do you handle Hunter.io rate limits?

We use residential ISP proxies and request timing modelled on human behaviour. We monitor for rate limit responses in real time and trigger IP pool rotation automatically.

What data points can you extract?

We extract domain email patterns, total contact counts, professional profiles including names and positions, verification statuses, confidence scores, and associated social media URLs.

How fresh is the data?

Data is extracted in real time during the pipeline run. Full domain list refreshes complete within agreed SLA windows depending on the volume of target domains.

What is the minimum viable engagement?

Our smallest packages start at a defined list of 5,000 domains. For larger catalogues, we price based on volume and delivery frequency.

Can I request a sample dataset before committing?

Yes. We provide a sample run of up to 100 domains as part of the pre-engagement scoping process so you can validate schema fit and data quality.

$ dataflirt scope --new-project --source=hunter.io ready

Tell us what
to extract.
We do the rest.

20-minute scoping call. Pilot dataset within the week. Production within two. Whether you need a one-off domain list extraction or continuous monitoring of target accounts. Tell us what you need.

hello@dataflirt.com · Bengaluru · IST · typical reply < 4h
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