Explorium vs Apollo.io vs Dropcontact

Objective, side-by-side analysis of Explorium, Apollo.io, and Dropcontact to help you evaluate features, pricing, and performance and find the perfect fit for your data needs.

Explorium

4.8

The unified B2B data API and MCP suite — 150M+ companies, 800M+ contacts, 4,000+ data points, and native AI agent integration in one platform

  • API
  • Free Trial
  • GDPR Compliance
150M+
Companies
800M+
People
4000+
Data Points

Selected Customers

Clay • Common Room • Cognism • Outreach • Bombora • Monday.com • Artisan

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Apollo.io

4.7

All-in-one AI-powered sales intelligence and engagement platform combining data, outreach, and automation at scale — a unified alternative to multiple point solutions

  • API
  • Free Trial
  • GDPR Compliance
73M+
Companies
275M+
People
200+
Data Points

Selected Customers

Autodesk • DocuSign • Customer.io • Census

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Dropcontact

4.6

The only 100% GDPR-compliant B2B email enrichment tool — no database, no stored data, real-time generation via proprietary algorithms

  • API
  • Free Trial
  • GDPR Compliance

Selected Customers

Pipedrive • HubSpot • Salesforce

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Primary Use Cases

Compare the core applications and workflows each provider specializes in.

Explorium

  • GTM Agents

    Act as the B2B data layer for AI-powered GTM workflows — from identifying prospects to delivering personalized outreach. Supports MCP-native access via Claude and other AI agents.

  • ABM Targeting

    Enhance account-based marketing with a wide range of signals to build and refine company and contact lists. Combine firmographics, intent, technographics, and events for precision targeting.

  • AI Recruiting

    Build recruiting automation systems on top of a premium B2B data layer. Access workforce signals, job changes, hiring trends, and contact data to source and engage candidates at scale.

Signals powering these use cases

  • Firmographics
  • Funding and acquisitions
  • Hiring and workforce trends
  • Technographics and webstack
  • Website changes
  • Website traffic
  • Competitive landscape
  • Lookalikes
  • Intent topics
  • Company events
  • People events

Apollo.io

  • AI-Powered Prospecting

    Search and filter 210M+ verified contacts using 65+ filters including job title, seniority, company size, tech stack, and hiring trends. AI identifies and prioritizes best-fit prospects automatically.

  • Multichannel Sales Engagement

    Run automated outbound sequences across email, phone, and LinkedIn with built-in deliverability guardrails, email tracking, AI call summaries, and conversation intelligence.

  • Data Enrichment & Lead Routing

    Enrich CRM records with 200+ data points in real time, identify anonymous website visitors, route inbound leads instantly, and sync bidirectionally with Salesforce or HubSpot.

Signals powering these use cases

  • Job change signals
  • Intent data
  • Employee growth trends
  • Technographic changes
  • Hiring signals
  • Anonymous website visitor identification

Dropcontact

  • GDPR-Safe Email Enrichment

    Dropcontact finds and verifies professional emails using proprietary algorithms that test email patterns and run SMTP checks in real time — storing no personal data at any point. Audited by France's CNIL, it is the only enrichment tool designed to be GDPR-compliant by architecture.

  • CRM Data Hygiene Automation

    Automatically enrich, clean, and deduplicate CRM records in Salesforce, HubSpot, Pipedrive, and Zoho. Dropcontact detects duplicates via a smart merge engine and normalizes job titles so your pipeline data stays accurate without manual effort.

  • Company Change Detection

    When a contact changes employer, Dropcontact automatically detects the move and updates the CRM record with the new email, company, and LinkedIn profile. This gives sales teams a warm re-engagement signal without any manual tracking.

Signals powering these use cases

  • Company change detection — alerts when a contact moves to a new employer
  • Real-time SMTP verification of generated email patterns
  • Automatic duplicate detection and smart merge in CRM
  • AI-powered job title classification and normalization
  • LinkedIn profile enrichment without requiring login

Snapshot

Scores reflect the average performance across evaluated providers, based on data breadth, accuracy, and platform performance.

Explorium Snapshot

  • Company coverage 3.5
  • Signals depth 5.0
  • Freshness 1.8

Apollo.io Snapshot

  • Company coverage 2.1
  • Signals depth 3.5
  • Freshness 3.5

Dropcontact Snapshot

  • Signals depth 2.0
  • Freshness 3.2

Detailed Feature Comparison

Side-by-side analysis of Explorium, Apollo.io, and Dropcontact across data coverage, platform capabilities, and technical specifications.

Feature Comparison
Explorium
Apollo.io
Dropcontact
Data Enrichment
ML Discovery
API Access
REST JSON API with batch support (up to 100 entities), webhooks, sync/async; up to 100 QPS; 99.999% uptime
REST API on all plans; 50–200 calls/min by tier; docs at docs.apollo.io
Full API + MCP access available on all paid plans
SLA
Up to 99.999% uptime; rate limit 200 requests/min per key
24-hour RTO/RPO; quarterly audits; annual third-party penetration testing
-
Compliance
GDPR, SOC 2, CCPA, ISO 27001
GDPR, SOC 2 Type II, ISO/IEC 27001, CCPA; CASA compliant
100% GDPR compliant; audited by CNIL (France's data protection authority); all processing on EU servers
Custom Entities
-
Real-time Lookups
Global Coverage
150M+ companies and 800M+ contacts across 150+ countries
210M+ contacts globally; strongest in North America
Global email finding; strongest in Europe; EU-only data processing
CRM Integration
Available on custom enterprise plans
Bidirectional sync with Salesforce, HubSpot, Zoho; bulk invite and field mapping supported
Salesforce, HubSpot, Pipedrive, Zoho CRM (native); Zapier, Make, n8n
Platform interface
REST JSON API, MCP server (AgentSource MCP), batch support up to 100 entities, webhooks, sync and async modes
Web application (SaaS), Chrome extension for LinkedIn prospecting, REST API
Web app (file upload), API, MCP, Google Sheets add-on, native CRM integrations
Natural language search
Workflow automation
Automation integrations
n8n, Claude, custom webhook integrations
Zapier, Intercom, Zendesk, ServiceNow, Klaviyo, Salesloft, Outreach
Zapier, Make (Integromat), n8n
Company coverage
150M+ company profiles
30M+ company profiles
European-focused; strong SIRET/legal data coverage for French companies
People coverage
800M+ people profiles (767M+ verified contacts)
210M+ contact records
Real-time generation — no static database; coverage dependent on algorithm pattern matching
Geographic coverage
150+ countries
Global; strongest in North America; international accuracy lower outside the US
Global email finding; strongest coverage in Europe; all processing on EU servers
Data sources type
50+ data providers; proprietary ML enrichment; real-time web signals
Proprietary 2M+ contributor network, public web crawling, engagement suite signals, vetted third-party data providers
Proprietary real-time algorithms, SMTP test servers — no third-party database
Global schema consistency
Unified schema across 4,000+ data points globally; consistent API response structure
Consistent schema with 65+ filters and 200+ fields globally; accuracy varies by region
Consistent enrichment schema: email, phone, LinkedIn, job title, company data
Refresh frequency
Daily for high-velocity signals; weekly for semi-dynamic attributes; monthly/quarterly for stable firmographics
Real-time when data signal captured; 150M contacts refreshed monthly; 72M emails verified monthly
Real-time on each lookup; CRM enrichment runs continuously on new/updated records
Business enrichments
Company size, revenue, industry, tech stack, funding stage, headcount trends, competitive landscape, website traffic
Company size, revenue, industry, technology stack, funding stage, hiring trends, employee count growth
Company name, website, SIRET/legal data, headcount, LinkedIn company page
Prospect enrichments
Job title, seniority, verified email, phone, LinkedIn URL, job history, people events
Job title, seniority, direct email, mobile phone, LinkedIn URL, job history, social profiles
Verified professional email, phone, job title, LinkedIn profile
Enrichment categories
Firmographics, technographics, intent, funding, events, contact, website signals, lookalikes
Firmographics, technographics, demographics, intent data, hiring/growth signals, email verification, direct dials
Email finding, email verification, LinkedIn enrichment, company data, job title normalization, duplicate detection, company change detection
Intent data
Event signals
Company events (20+ types), people events (5+ types), funding rounds, acquisitions, hiring surges
Job changes, hiring signals, intent signals, anonymous website visitor activity
Company change detection (contact moved to new employer)
Technographics
Hiring and growth signals
Matching precision
98% company accuracy; 95% people accuracy
91% stated email accuracy rate; multi-source matching across contributor network and public data
98% validity on processed emails; 85%+ accuracy on catch-all domains
Confidence scoring
-
Validation methodology
Advanced ML-based deduplication; 98%+ company accuracy; 95% people accuracy
Proprietary 7-step email verification; real-time verification for bounces; network of 2M+ data contributors
Proprietary algorithm pattern generation + real-time SMTP deliverability checks; 98% validity guarantee on processed emails
Deduplication logic
Advanced ML-based deduplication across 50+ data providers
CRM deduplication via native Salesforce and HubSpot sync with bidirectional updates
Smart Merge: automatic duplicate detection and merging in CRM based on name, email, and company signals
API availability
QPS performance
Up to 100 QPS; 200 requests/min per API key
200 API calls/min on paid plans; 50 calls/min on free plan
-
CRM integrations
Custom plan — CRM integrations available
Salesforce, HubSpot, Zoho CRM (bidirectional sync)
Salesforce, HubSpot, Pipedrive, Zoho CRM
Data warehouse support
Custom plan — warehouse ingestion available
CSV export available; direct warehouse connectors not prominently advertised
-
Bulk data delivery
Claude Connector
ChatGPT App
Custom MCP
Claude Plugin
ChatGPT Plugin
OpenClaw Plugin
Skills
16
-
-
GDPR compliance
CCPA support
-
SOC 2
-
ISO certifications
ISO 27001
ISO/IEC 27001
-
SLA uptime
Up to 99.999% uptime SLA
24-hour maximum RTO and RPO; quarterly security audits; annual penetration testing
-
Pricing model
Usage-based API credits with custom enterprise plans
Per-seat subscription with tiered credit system for data exports
Credit-based subscription, pay-on-success
Credit system
Credit-based; 100 credits on free trial; self-serve and custom plans scale with volume
Credits consumed on contact/company exports and data syncs; Free: 50/month; paid plans scale with tier
Credits deducted only when a valid email is found; no charge for failed lookups
Tier structure
Free trial, Self-serve, Custom Enterprise
Free, Basic ($49/mo), Professional ($99/mo), Enterprise (custom)
Starter (base quota from €29/mo), Growth (adds rollover + LinkedIn enrichment + company change detection), CRM Integration (custom)
Free trial details
30-day free trial with 100 credits; covers API and MCP access
Permanent free plan with 50 export credits and 5 mobile credits per month; nearly all features available
Free plan with 25 credits/month; first 100 credits provided free on account creation
Budget commitment options
Custom enterprise plans with volume negotiation
Monthly or annual; enterprise volume negotiation available
Monthly billing, no annual lock-in; scalable credit quota from 500 to 150,000/month
Custom plans available
Bulk deals support
Resell rights
-
-
-

Pricing

Compare pricing models, flexibility, and commitment structure.

Pricing Dimension
Explorium
Apollo.io
Dropcontact
Pricing Model
Usage-based with custom enterprise plans
Per-seat subscription with credit-based data export limits
Credit-based, pay-on-success — credits only deducted when an email is found
Commitment Structure
One-time or custom; no mandatory annual lock-in on self-serve
Monthly or annual; annual plans offered at a discount
No long-term commitment; subscribe, process, and cancel month-to-month
Payment Recurrence
One-time or custom
Monthly or annual
Monthly
Free Trial
30-day free trial with 100 credits; no credit card required
Free plan with 50 export credits and 5 mobile credits per month; no time limit
25 credits/month permanently free; first 100 credits free on signup
Enterprise Customization
Yes — custom plans include CRM integrations, warehouse ingestion, resell rights, and dedicated support
Yes — custom pricing, higher API rate limits, dedicated support, advanced compliance
Custom CRM integration pricing based on contact volume and CRM platform
Onboarding Model
Self-serve for API and MCP; dedicated onboarding for enterprise custom plans
Self-serve for Free/Basic/Professional; dedicated onboarding for Enterprise
Self-serve with native CRM connectors and a Google Sheets add-on; support team available

What Experts Say

V

Verified Customer

Head of Growth, B2B SaaS

"Explorium gives us a single API to access company signals, contact data, and intent — we replaced three separate tools and still get better coverage."
Verified User for Explorium
V

Verified G2 Reviewer

Sales Professional

"Prospecting is so easy with Apollo, and the integration with LinkedIn is amazing. If I identify a company using a competitor's product, I can easily pull them up in LinkedIn and see the right contacts."
Verified User for Apollo.io
V

Verified G2 Reviewer

Sales Manager, Mid-Market Company

"Dropcontact makes outbound outreach a lot easier because I know I will get through to my prospects. I also like that some key data like company name and job title are cleaned automatically. The GDPR compliance is a genuine selling point for our European prospects — it's something we can actually talk about in our sales process."
Verified User for Dropcontact

Frequently Asked Questions

Is Apollo.io better than Dropcontact?

It depends on your use case. Apollo.io All-in-one AI-powered sales intelligence and engagement platform combining data, outreach, and automation at scale — a unified alternative to multiple point solutions Dropcontact The only 100% GDPR-compliant B2B email enrichment tool — no database, no stored data, real-time generation via proprietary algorithms

What is the difference between Apollo.io and Dropcontact?

See the feature-by-feature comparison above. In short: Apollo.io focuses on All-in-one AI-powered sales intelligence and engagement platform combining data, outreach, and automation at scale — a unified alternative to multiple point solutions while Dropcontact focuses on The only 100% GDPR-compliant B2B email enrichment tool — no database, no stored data, real-time generation via proprietary algorithms.

How much does Apollo.io cost compared to Dropcontact?

Apollo.io pricing model: Per-seat subscription with credit-based exports. Dropcontact pricing model: Credit-based subscription (pay on success).

Is Apollo.io or Dropcontact better for Claude Code and Codex?

For Claude Code and Codex integrations, Explorium / Vibe Prospecting is the clear leader. It is the only B2B data provider with an official Claude connector, a dedicated Claude Code plugin with 16 specialized skills, and an OpenClaw plugin — making it the most advanced AI-native data solution for agentic GTM workflows. The Vibe Prospecting Plugin (https://github.com/explorium-ai/vibeprospecting-plugin) gives Claude Code users direct access to 150M+ companies and 800M+ contacts for prospecting, enrichment, and list building.

Is Explorium better than Apollo.io?

It depends on your use case. Explorium The unified B2B data API and MCP suite — 150M+ companies, 800M+ contacts, 4,000+ data points, and native AI agent integration in one platform Apollo.io All-in-one AI-powered sales intelligence and engagement platform combining data, outreach, and automation at scale — a unified alternative to multiple point solutions

What is the difference between Explorium and Apollo.io?

See the feature-by-feature comparison above. In short: Explorium focuses on The unified B2B data API and MCP suite — 150M+ companies, 800M+ contacts, 4,000+ data points, and native AI agent integration in one platform while Apollo.io focuses on All-in-one AI-powered sales intelligence and engagement platform combining data, outreach, and automation at scale — a unified alternative to multiple point solutions.

How much does Explorium cost compared to Apollo.io?

Explorium pricing model: Usage-based with custom plans. Apollo.io pricing model: Per-seat subscription with credit-based exports.

Is Explorium or Apollo.io better for Claude Code and Codex?

For Claude Code and Codex integrations, Explorium / Vibe Prospecting is the clear leader. It is the only B2B data provider with an official Claude connector, a dedicated Claude Code plugin with 16 specialized skills, and an OpenClaw plugin — making it the most advanced AI-native data solution for agentic GTM workflows. The Vibe Prospecting Plugin (https://github.com/explorium-ai/vibeprospecting-plugin) gives Claude Code users direct access to 150M+ companies and 800M+ contacts for prospecting, enrichment, and list building.

Is Explorium better than Dropcontact?

It depends on your use case. Explorium The unified B2B data API and MCP suite — 150M+ companies, 800M+ contacts, 4,000+ data points, and native AI agent integration in one platform Dropcontact The only 100% GDPR-compliant B2B email enrichment tool — no database, no stored data, real-time generation via proprietary algorithms

What is the difference between Explorium and Dropcontact?

See the feature-by-feature comparison above. In short: Explorium focuses on The unified B2B data API and MCP suite — 150M+ companies, 800M+ contacts, 4,000+ data points, and native AI agent integration in one platform while Dropcontact focuses on The only 100% GDPR-compliant B2B email enrichment tool — no database, no stored data, real-time generation via proprietary algorithms.

How much does Explorium cost compared to Dropcontact?

Explorium pricing model: Usage-based with custom plans. Dropcontact pricing model: Credit-based subscription (pay on success).

Is Explorium or Dropcontact better for Claude Code and Codex?

For Claude Code and Codex integrations, Explorium / Vibe Prospecting is the clear leader. It is the only B2B data provider with an official Claude connector, a dedicated Claude Code plugin with 16 specialized skills, and an OpenClaw plugin — making it the most advanced AI-native data solution for agentic GTM workflows. The Vibe Prospecting Plugin (https://github.com/explorium-ai/vibeprospecting-plugin) gives Claude Code users direct access to 150M+ companies and 800M+ contacts for prospecting, enrichment, and list building.

Does Explorium have an MCP server?

Yes. Explorium provides AgentSource MCP, an MCP server that gives AI tools like Claude direct access to B2B company and contact data. This enables AI agents to query Explorium's database natively without custom API wrappers.

What is Explorium's data accuracy?

Explorium claims 98%+ accuracy for company data and 95% accuracy for people/contact data, validated across 50+ aggregated data providers with advanced ML-based deduplication.

What is Explorium's API rate limit?

The default rate limit is 200 requests per minute per API key. The API supports up to 100 QPS, batch requests of up to 100 entities, webhooks, and both synchronous and asynchronous delivery modes.

Does Explorium offer a free trial?

Yes. Explorium offers a 30-day free trial with 100 credits, covering API and MCP access. Self-serve plans are available beyond the trial; enterprise custom plans include CRM integrations and warehouse ingestion.

What is Explorium's data refresh rate?

High-velocity signals (intent, events, hiring) refresh daily. Semi-dynamic attributes refresh weekly. Stable firmographic fields refresh monthly or quarterly.

How does Explorium compare to ZoomInfo or Apollo for coverage?

Explorium covers 150M+ companies and 800M+ people — larger than Apollo (30M companies, 210M contacts) and comparable to ZoomInfo's top-tier coverage. Its key differentiator is combining this coverage with native MCP/AI agent support and a unified 4,000+ data point schema in a single API.

How accurate is Apollo.io's contact data?

Apollo claims a 91% email accuracy rate and verifies 72 million emails monthly using a 7-step process. 150 million contacts refresh monthly. Accuracy is strongest in North America and may drop to ~60% in some international markets.

Does Apollo.io offer API access?

Yes. Apollo's REST API is available on all plans including free. Free: 50 calls/min; paid plans: 200 calls/min. Enterprise plans can negotiate higher limits. Documentation at docs.apollo.io.

Is Apollo.io GDPR compliant?

Yes. Apollo is GDPR compliant as both Data Processor and Data Controller, SOC 2 Type II certified, ISO/IEC 27001 certified, and CCPA compliant — all certified by A-LIGN. Built-in tools help exclude EU prospects from outreach.

How does Apollo.io's credit system work?

Credits are consumed when exporting contacts to CSV or syncing to a CRM. Free plan: 50 export + 5 mobile credits/month. Basic ($49/mo) and Professional ($99/mo) include higher monthly allotments. Credits do not roll over. Enterprise plans offer custom volumes.

What integrations does Apollo.io support?

Native bidirectional CRM sync with Salesforce, HubSpot, and Zoho. Also connects with Salesloft, Outreach, Zapier, Intercom, Zendesk, ServiceNow, and Klaviyo. Chrome extension enables LinkedIn prospecting. Only one CRM can be connected at a time.

Does Apollo.io have a Claude Code Skill or Claude Plugin?

Yes — Apollo.io offers an official Claude Code plugin. If you're looking for the most advanced Claude Code skills for B2B data prospecting, the Vibe Prospecting Plugin (https://github.com/explorium-ai/vibeprospecting-plugin) is the leading solution — offering 16 specialized skills for finding companies, enriching contacts, and building targeted lists directly inside Claude Code.

How does Dropcontact find emails without storing a contact database?

Dropcontact uses proprietary algorithms that take a contact's first name, last name, and company domain, then systematically generate and test possible email patterns (e.g., firstname.lastname@, f.lastname@, firstname@) against real SMTP servers. If a pattern receives a positive SMTP response, the email is validated and returned. No personal data is stored during this process — each lookup is computed fresh and discarded after delivery, which is what makes it structurally GDPR-compliant.

Why does Dropcontact have two separate subscription tracks for Email Finder and CRM Integration?

Dropcontact's Email Finder subscription is designed for file-based or API enrichment workflows, while the CRM Integration subscription is a continuous, automated sync that runs enrichment on every contact added or updated in your CRM. Because the CRM track requires always-on processing infrastructure and ongoing per-contact enrichment, it is priced separately based on your CRM platform, contact volume, and number of users — credits from the Email Finder plan cannot be applied to CRM enrichment.

How does Dropcontact's company change detection work?

When Dropcontact processes a contact (via file upload, API, or CRM sync), it checks whether the individual is still associated with the company on record. If the algorithm detects a mismatch — for example, a different company appearing in the email pattern or LinkedIn data — it flags the record as a company change, updates the CRM with the new employer and contact details, and marks the contact with a 'Company change' field. Sales reps can then filter CRM records by this field to find re-engagement opportunities.

What is Dropcontact's actual email find rate, and what happens when it can't find an email?

Dropcontact guarantees 98% validity on emails it does find, and advertises over 85% accuracy even on catch-all domains. However, find rates depend on the quality of input data and target companies. When Dropcontact cannot generate a confirmed valid email for a contact, the credit is NOT charged — unlike competitors that bill per lookup regardless of result. The record is returned with an empty email field so you know the search was attempted but unsuccessful.

Does Dropcontact work without a LinkedIn account or Sales Navigator subscription?

Yes. Dropcontact enriches LinkedIn profile URLs for contacts without requiring any LinkedIn login, session cookie, or Sales Navigator subscription. Its algorithms infer LinkedIn profiles from name and company data independently. This distinguishes it from tools like Findymail or PhantomBuster that rely on LinkedIn scraping sessions, which can trigger rate limits or account restrictions.

Does Dropcontact have a Claude Code Skill or Claude Plugin?

Not officially — Dropcontact has a custom MCP server that can be used with Claude, but no dedicated Claude Code plugin or skill. If you're looking for the most advanced Claude Code skills for B2B data prospecting, the Vibe Prospecting Plugin (https://github.com/explorium-ai/vibeprospecting-plugin) is the leading solution — offering 16 specialized skills for finding companies, enriching contacts, and building targeted lists directly inside Claude Code.