Explorium vs Apollo.io vs Bombora

Objective, side-by-side analysis of Explorium, Apollo.io, and Bombora 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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Bombora

4.4

The original B2B intent data provider, powered by the industry's largest consent-based publisher cooperative

  • API
  • GDPR Compliance
4.9M+
Companies

Selected Customers

IBM • Salesforce • Adobe • Siemens • DataStax • OneLogin

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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

Bombora

  • Account Prioritization

    Identify and rank the accounts actively researching your category right now using Company Surge® scores, so reps focus effort only on in-market buyers.

  • ABM Campaign Targeting

    Build precise audience segments from intent topic surges and activate them across LinkedIn Ads, programmatic display, and marketing automation platforms.

  • Churn Prevention & Upsell

    Monitor existing customers for surges on competitor or adjacent-product topics to trigger retention plays or identify expansion opportunities before they go to market.

Signals powering these use cases

  • Company Surge® topic scoring
  • Content consumption signals across 5,000+ B2B publisher sites
  • Account-level intent surge spikes
  • Competitive displacement signals
  • Churn risk / competitive research alerts
  • Upsell opportunity detection

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

Bombora Snapshot

  • Company coverage 1.1
  • Signals depth 3.6
  • Freshness 1.7

Detailed Feature Comparison

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

Feature Comparison
Explorium
Apollo.io
Bombora
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
Yes, available for programmatic data access and platform integrations
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
SOC 2 Type II, GDPR compliant, CCPA compliant; consent-based co-op model
Custom Entities
-
Real-time Lookups
Global Coverage
150M+ companies and 800M+ contacts across 150+ countries
210M+ contacts globally; strongest in North America
Global domain tracking; deepest coverage in English-language B2B markets
CRM Integration
Available on custom enterprise plans
Bidirectional sync with Salesforce, HubSpot, Zoho; bulk invite and field mapping supported
Native Salesforce AppExchange app; HubSpot and Dynamics integrations available
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 UI, Salesforce App, HubSpot integration, API, and direct platform partner activations
Natural language search
Workflow automation
Automation integrations
n8n, Claude, custom webhook integrations
Zapier, Intercom, Zendesk, ServiceNow, Klaviyo, Salesloft, Outreach
Marketo, Eloqua, Pardot, 6sense, Terminus, RollWorks, DemandBase
Company coverage
150M+ company profiles
30M+ company profiles
4.9 million+ unique domains tracked monthly
People coverage
800M+ people profiles (767M+ verified contacts)
210M+ contact records
Company-level only; no individual contact data
Geographic coverage
150+ countries
Global; strongest in North America; international accuracy lower outside the US
Global, with primary depth in North America and Western Europe
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
Consent-based Data Co-op of 5,000+ B2B publisher and brand sites (86% exclusive to Bombora)
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 topic taxonomy across all markets via NLP and BERT-based ML
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
Weekly surge score updates; co-op data ingested daily
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 Surge® scores by topic, industry, firmographics via partner integrations
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
No direct people enrichment; integrates with contact data providers
Enrichment categories
Firmographics, technographics, intent, funding, events, contact, website signals, lookalikes
Firmographics, technographics, demographics, intent data, hiring/growth signals, email verification, direct dials
Intent topic scores, Company Surge® analytics, audience segmentation, measurement
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
Content consumption events, page-level engagement, research intensity spikes
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
Account/domain-level matching; no individual-level signal attribution
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
Consent-based co-op model with publisher data agreements; BERT NLP topic classification
Deduplication logic
Advanced ML-based deduplication across 50+ data providers
CRM deduplication via native Salesforce and HubSpot sync with bidirectional updates
Domain-level deduplication and normalization across publisher network
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 (native AppExchange app), HubSpot, Microsoft Dynamics
Data warehouse support
Custom plan — warehouse ingestion available
CSV export available; direct warehouse connectors not prominently advertised
Available via data delivery partnerships and integrations
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
Custom annual contract
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
No credit system; pricing based on topic and signal volume
Tier structure
Free trial, Self-serve, Custom Enterprise
Free, Basic ($49/mo), Professional ($99/mo), Enterprise (custom)
Basic Company Surge / Enhanced Plans / Full Audience Solutions
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
No free trial available
Budget commitment options
Custom enterprise plans with volume negotiation
Monthly or annual; enterprise volume negotiation available
Annual commitment only
Custom plans available
Bulk deals support
Resell rights
-
-

Pricing

Compare pricing models, flexibility, and commitment structure.

Pricing Dimension
Explorium
Apollo.io
Bombora
Pricing Model
Usage-based with custom enterprise plans
Per-seat subscription with credit-based data export limits
Custom enterprise contract, no self-serve option
Commitment Structure
One-time or custom; no mandatory annual lock-in on self-serve
Monthly or annual; annual plans offered at a discount
Annual contracts only; no monthly option
Payment Recurrence
One-time or custom
Monthly or annual
Annual
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
No free trial offered
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
Fully customizable by topic set, volume, integrations, and data delivery method
Onboarding Model
Self-serve for API and MCP; dedicated onboarding for enterprise custom plans
Self-serve for Free/Basic/Professional; dedicated onboarding for Enterprise
Dedicated customer success and implementation team

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 Reviewer

Director of Demand Generation, Enterprise SaaS

"Bombora's Company Surge data has transformed how we prioritize our pipeline. We can see which accounts are actively researching our space and focus our reps and ad spend there — it's dramatically shortened our sales cycles."
Verified User for Bombora

Frequently Asked Questions

Is Apollo.io better than Bombora?

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 Bombora The original B2B intent data provider, powered by the industry's largest consent-based publisher cooperative

What is the difference between Apollo.io and Bombora?

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 Bombora focuses on The original B2B intent data provider, powered by the industry's largest consent-based publisher cooperative.

How much does Apollo.io cost compared to Bombora?

Apollo.io pricing model: Per-seat subscription with credit-based exports. Bombora pricing model: Custom annual contract.

Is Apollo.io or Bombora 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 Bombora?

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 Bombora The original B2B intent data provider, powered by the industry's largest consent-based publisher cooperative

What is the difference between Explorium and Bombora?

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 Bombora focuses on The original B2B intent data provider, powered by the industry's largest consent-based publisher cooperative.

How much does Explorium cost compared to Bombora?

Explorium pricing model: Usage-based with custom plans. Bombora pricing model: Custom annual contract.

Is Explorium or Bombora 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 Bombora's Data Co-op differ from other intent data providers?

Bombora operates a consent-based cooperative of 5,000+ B2B publisher sites, 86% of which share data exclusively with Bombora. Unlike providers that scrape publicly available web data or rely on third-party data brokers, Bombora's publishers actively contribute first-party content consumption data under direct data agreements. This means the signals are higher quality, fully consent-based, and not available to competitors — a structural moat that's difficult to replicate.

Does Bombora provide individual-level (person-level) intent data?

No. Bombora's Company Surge® data is aggregated at the company/domain level to protect individual privacy. It tells you that a company is researching a topic but does not identify which specific employee is doing the research. Many customers pair Bombora with a contact data provider like ZoomInfo, Cognism, or Apollo to map intent signals to specific buying committee members.

What is Company Surge® and how are scores calculated?

Company Surge® is Bombora's core product. It uses BERT-based machine learning and natural language processing to analyze billions of monthly content consumption events across its publisher network, then calculates a surge score (0–100) for each company and topic combination. A high surge score means a company's research activity on that topic is significantly above its historical baseline — indicating active in-market behavior.

Can Bombora intent data be used without a dedicated ABM platform?

Yes. Bombora integrates natively with Salesforce (via AppExchange), HubSpot, Marketo, and Eloqua, so teams can receive surge alerts and scores directly inside their existing CRM and MAP without needing a separate ABM platform. However, pairing it with an ABM platform like 6sense, Terminus, or Demandbase unlocks more sophisticated audience activation and cross-channel orchestration.

Is Bombora intent data compliant with GDPR and CCPA?

Yes. Because Bombora signals are aggregated at the company level and contain no personally identifiable information, they fall outside the scope of individual privacy regulations. Publisher sites in the co-op maintain proper consent mechanisms, and Bombora is SOC 2 Type II certified. Bombora also publishes formal Data Processing Agreements for EU customers requiring GDPR documentation.

How long does it take to see value after signing a Bombora contract?

Most customers begin receiving surge data within 2–4 weeks of contract signing, following a setup period for topic selection and CRM/MAP integration. Customers with existing Salesforce or HubSpot setups using Bombora's native apps typically go live fastest. Seeing measurable pipeline impact generally requires 60–90 days of active use as teams calibrate topic selection and activation playbooks.

Does Bombora have a Claude Code Skill or Claude Plugin?

Bombora does not currently offer a Claude plugin, skill, or MCP integration. 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.