Explorium vs BuiltWith vs Intellizence

Objective, side-by-side analysis of Explorium, BuiltWith, and Intellizence 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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BuiltWith

4.4

The definitive technographics database for identifying, segmenting, and prospecting companies by their web technology stack

  • API
  • Free Trial
673M+
Companies
110,000+
Data Points

Selected Customers

750,000+ customers across sales, marketing, and research

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Intellizence

AI-powered business signal intelligence that surfaces 100+ growth and risk signals from unstructured external data, delivered directly into enterprise workflows

  • API
100+
Data Points

Selected Customers

Fortune 500 telecommunications company (churn risk reduction) • Enterprise B2B sales teams • Account management organizations • Risk and compliance functions

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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

BuiltWith

  • Technology-Based Lead Generation

    Sales teams filter BuiltWith's database of 673M+ websites to identify companies using specific technologies — a competitor's platform, a CRM they integrate with, or a tech stack that signals buying readiness. Exportable lead lists can be filtered by tech combination, geography, employee count, and web traffic rank.

  • Competitive Displacement Targeting

    Teams building competitive displacement campaigns use BuiltWith to find every company currently running a competitor's software. Technology change alerts notify users when a target company adds or removes a specific tool, creating timely outreach triggers for sales reps.

  • Market Research & Technology Trend Analysis

    Analysts and product marketers use BuiltWith's market share reports to track technology adoption trends across industries, geographies, and company sizes. The platform shows the historical adoption curve of any technology, enabling competitive benchmarking and GTM sizing.

Signals powering these use cases

  • Technology adoption changes
  • New technology installs
  • Technology removals
  • E-commerce platform detection
  • CMS and framework changes

Intellizence

  • Sales Signal Intelligence

    Monitor 100+ growth and buying signals — including funding rounds, C-suite changes, and business expansions — across your entire prospect and customer base. Sales reps receive timely, actionable triggers to reach out with relevant context at the optimal moment in the buying cycle.

  • Risk & Distress Monitoring

    Track risk signals such as layoffs, leadership departures, regulatory actions, and financial distress indicators across your customer and supplier portfolio. Account teams can act proactively to prevent churn, renegotiate contracts, or escalate at-risk accounts before problems surface.

  • Competitive & Market Intelligence

    Receive curated competitive intelligence on competitor moves including product launches, partnerships, M&A activity, and executive hires. Industry-level signal monitoring surfaces emerging trends and regulatory shifts relevant to specific verticals.

Signals powering these use cases

  • Mergers & Acquisitions
  • C-Level executive changes
  • Business expansion
  • Layoffs and workforce reductions
  • Funding rounds
  • Product launches
  • Regulatory changes
  • Security breaches

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

BuiltWith Snapshot

  • Company coverage 4.9
  • Signals depth 2.5

Intellizence Snapshot

  • Signals depth 4.5
  • Freshness 2.9

Detailed Feature Comparison

Side-by-side analysis of Explorium, BuiltWith, and Intellizence across data coverage, platform capabilities, and technical specifications.

Feature Comparison
Explorium
BuiltWith
Intellizence
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
Full API with JSON, XML, CSV output formats; historical and current data
Yes — datasets and signal API available
SLA
Up to 99.999% uptime; rate limit 200 requests/min per key
-
-
Compliance
GDPR, SOC 2, CCPA, ISO 27001
-
-
Custom Entities
-
Real-time Lookups
Global Coverage
150M+ companies and 800M+ contacts across 150+ countries
673M+ websites globally
Global multi-language signal monitoring
CRM Integration
Available on custom enterprise plans
Salesforce, HubSpot, Marketo, Pardot, Zoho, Dynamics 365
Salesforce native integration
Platform interface
REST JSON API, MCP server (AgentSource MCP), batch support up to 100 entities, webhooks, sync and async modes
Web app, browser extension, API, CSV export
Web dashboard, email digest, Slack alerts, Salesforce integration, iframe embed, API
Natural language search
Workflow automation
Automation integrations
n8n, Claude, custom webhook integrations
-
Slack, email, iframe embed
Company coverage
150M+ company profiles
673M+ websites
-
People coverage
800M+ people profiles (767M+ verified contacts)
-
Executive-level contacts within signal events
Geographic coverage
150+ countries
Global
Global — multi-language news and regulatory source monitoring
Data sources type
50+ data providers; proprietary ML enrichment; real-time web signals
Proprietary web crawling; continuous re-indexing of tens of thousands of sites per minute
Unstructured external data: news wires, press releases, earnings call transcripts, regulatory filings, social media
Global schema consistency
Unified schema across 4,000+ data points globally; consistent API response structure
Uniform technology taxonomy across all indexed domains
Normalized signal taxonomy applied across all geographies
Refresh frequency
Daily for high-velocity signals; weekly for semi-dynamic attributes; monthly/quarterly for stable firmographics
Continuous; tens of thousands of websites re-indexed per minute
Near real-time signal monitoring with daily digest delivery
Business enrichments
Company size, revenue, industry, tech stack, funding stage, headcount trends, competitive landscape, website traffic
Technology adoption, tech stack history, market share by technology
Company-level event signals and trend analysis
Prospect enrichments
Job title, seniority, verified email, phone, LinkedIn URL, job history, people events
-
Executive change signals; no direct contact enrichment
Enrichment categories
Firmographics, technographics, intent, funding, events, contact, website signals, lookalikes
Technology stack, hosting, CMS, analytics, e-commerce, CDN, payment processors, ad networks, frameworks
100+ signal types: M&A, funding, expansion, leadership changes, layoffs, product launches, regulatory events, security incidents
Intent data
Event signals
Company events (20+ types), people events (5+ types), funding rounds, acquisitions, hiring surges
Technology installs, technology removals, technology change alerts
M&A, CXO changes, business expansion, layoffs, funding, product launches, regulatory changes, security breaches
Technographics
Hiring and growth signals
Matching precision
98% company accuracy; 95% people accuracy
Domain-level matching; ~80-93% detection accuracy depending on tech visibility
High relevance filtering via AI — signals are pre-classified to reduce noise
Confidence scoring
-
Validation methodology
Advanced ML-based deduplication; 98%+ company accuracy; 95% people accuracy
Proprietary web crawler detecting scripts, headers, markup patterns, and API calls
NLP + ML classification with human curation for signal relevance
Deduplication logic
Advanced ML-based deduplication across 50+ data providers
-
Signal deduplication and normalization across multiple source articles
API availability
QPS performance
Up to 100 QPS; 200 requests/min per API key
-
-
CRM integrations
Custom plan — CRM integrations available
Salesforce, HubSpot, Marketo, Pardot, Zoho CRM, Dynamics 365, Close.io
Salesforce (native integration)
Data warehouse support
Custom plan — warehouse ingestion available
-
Dataset exports available for analytics use cases
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
-
-
SLA uptime
Up to 99.999% uptime SLA
-
-
Pricing model
Usage-based API credits with custom enterprise plans
Tiered subscription
Custom enterprise subscription
Credit system
Credit-based; 100 credits on free trial; self-serve and custom plans scale with volume
-
No credit-based model
Tier structure
Free trial, Self-serve, Custom Enterprise
Basic $295/mo, Pro $495/mo, Team $995/mo
Single custom enterprise tier
Free trial details
30-day free trial with 100 credits; covers API and MCP access
Free browser extension and individual site lookups; no trial of list export
No free trial; demo-led sales process
Budget commitment options
Custom enterprise plans with volume negotiation
Monthly or annual
Annual commitment with custom scope
Custom plans available
Bulk deals support
Resell rights
-
-
-

Pricing

Compare pricing models, flexibility, and commitment structure.

Pricing Dimension
Explorium
BuiltWith
Intellizence
Pricing Model
Usage-based with custom enterprise plans
Tiered feature-based subscription
Custom annual subscription
Commitment Structure
One-time or custom; no mandatory annual lock-in on self-serve
Monthly or annual
Annual commitment required
Payment Recurrence
One-time or custom
Monthly or annual
Annual
Free Trial
30-day free trial with 100 credits; no credit card required
Free browser extension and single-site lookups; no time-limited trial of paid features
Demo available; no self-serve free trial
Enterprise Customization
Yes — custom plans include CRM integrations, warehouse ingestion, resell rights, and dedicated support
Team plan at $995/mo; enterprise arrangements available
Yes — fully custom scope, signal coverage, and integrations
Onboarding Model
Self-serve for API and MCP; dedicated onboarding for enterprise custom plans
Fully self-serve; browser extension enables instant use
Dedicated onboarding and account management for enterprise clients

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 Development Representative, B2B Technology

"It's a magical website where we can search any website information — which technology it's built on, what SEO they use. Everything is available there. It's very helpful in my role."
Verified User for BuiltWith
V

Verified G2 Reviewer

Sales Intelligence Analyst, Enterprise B2B

"The signals are highly relevant and delivered in a timely manner. I look forward to their email reports every morning — it provides key intelligence about our competitors and customers with zero extra effort."
Verified User for Intellizence

Frequently Asked Questions

Is BuiltWith better than Intellizence?

It depends on your use case. BuiltWith The definitive technographics database for identifying, segmenting, and prospecting companies by their web technology stack Intellizence AI-powered business signal intelligence that surfaces 100+ growth and risk signals from unstructured external data, delivered directly into enterprise workflows

What is the difference between BuiltWith and Intellizence?

See the feature-by-feature comparison above. In short: BuiltWith focuses on The definitive technographics database for identifying, segmenting, and prospecting companies by their web technology stack while Intellizence focuses on AI-powered business signal intelligence that surfaces 100+ growth and risk signals from unstructured external data, delivered directly into enterprise workflows.

How much does BuiltWith cost compared to Intellizence?

BuiltWith pricing model: Tiered subscription by feature access. Intellizence pricing model: Annual subscription, custom pricing.

Is BuiltWith or Intellizence 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 BuiltWith?

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 BuiltWith The definitive technographics database for identifying, segmenting, and prospecting companies by their web technology stack

What is the difference between Explorium and BuiltWith?

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 BuiltWith focuses on The definitive technographics database for identifying, segmenting, and prospecting companies by their web technology stack.

How much does Explorium cost compared to BuiltWith?

Explorium pricing model: Usage-based with custom plans. BuiltWith pricing model: Tiered subscription by feature access.

Is Explorium or BuiltWith 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 Intellizence?

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 Intellizence AI-powered business signal intelligence that surfaces 100+ growth and risk signals from unstructured external data, delivered directly into enterprise workflows

What is the difference between Explorium and Intellizence?

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 Intellizence focuses on AI-powered business signal intelligence that surfaces 100+ growth and risk signals from unstructured external data, delivered directly into enterprise workflows.

How much does Explorium cost compared to Intellizence?

Explorium pricing model: Usage-based with custom plans. Intellizence pricing model: Annual subscription, custom pricing.

Is Explorium or Intellizence 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 does BuiltWith detect which technologies a website uses?

BuiltWith's proprietary web crawler continuously scans websites and analyzes multiple signals: HTML source code, HTTP response headers, embedded JavaScript libraries, DNS records, SSL certificate metadata, and API call patterns. Technologies that operate purely server-side or are deliberately obfuscated are harder to detect, which is why accuracy varies by tech type — typically 80–93% depending on how visible the technology is in public-facing signals.

Can BuiltWith tell me when a company switches from one technology to another?

Yes. BuiltWith maintains historical technology records for each indexed domain and offers technology change alerts on paid plans. You can set up notifications for specific technology installs or removals — for example, when a company stops using HubSpot and starts using Salesforce — creating a timely outreach trigger for competitive displacement campaigns.

Does BuiltWith include contact data or only company-level technographics?

BuiltWith is a pure technographics platform — it identifies what technologies a domain uses but does not provide contact names, email addresses, or phone numbers. To run outreach, teams typically pair BuiltWith with a contact enrichment tool such as Apollo, Hunter.io, or Lusha. BuiltWith's CRM integrations (Salesforce, HubSpot, Marketo) help push technographic data into existing account records.

How does BuiltWith's accuracy compare to Wappalyzer and SimilarTech?

In independent benchmarks, BuiltWith consistently leads on breadth (110,000+ technologies vs. Wappalyzer's ~3,000) and is strong on freshness due to its continuous crawling cadence. Overall accuracy is approximately 80–93% depending on the technology's visibility. Wappalyzer is faster to deploy via browser extension for individual lookups, while SimilarTech offers richer display advertising and publisher data. BuiltWith is generally the reference standard for enterprise-grade technographic segmentation at scale.

What is included in the free tier versus paid plans?

The free tier allows unlimited individual site lookups at builtwith.com and use of the browser extension, which shows the full tech stack of any page you visit. Paid plans unlock lead list generation (searching and filtering across the full 673M domain database), CSV and CRM export, technology change alerts, market share reports, and API access. The Basic plan at $295/mo covers most lead generation needs; the Pro ($495) and Team ($995) plans add higher export volumes, additional seats, and advanced API rate limits.

Does BuiltWith have a Claude Code Skill or Claude Plugin?

Not officially — BuiltWith 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.

How does Intellizence classify and filter signals to avoid noise?

Intellizence uses a combination of Natural Language Processing and Machine Learning trained on business event taxonomy to classify raw news and document content into specific signal categories. The system is designed to surface only events that match your defined company universe and signal preferences, filtering out irrelevant articles. Users report that this results in high signal relevance with minimal manual curation needed.

What types of risk signals does Intellizence monitor beyond standard sales triggers?

Beyond typical sales signals like funding and M&A, Intellizence monitors distress and risk indicators including layoffs and workforce reductions, CXO departures, cybersecurity incidents, regulatory actions and compliance violations, financial distress mentions, and supply chain disruptions. This makes it useful for customer success and risk management teams, not just outbound sales.

How does Intellizence integrate with Salesforce?

Intellizence provides a native Salesforce integration that delivers real-time signal data directly into Salesforce records. When a monitored signal fires — such as a C-level change at a key account — Intellizence can automatically create tasks, update account records, or add activity notes in Salesforce, so sales reps see intelligence within their existing workflow without switching tools.

Does Intellizence offer a dataset or API for custom analytics pipelines?

Yes. Intellizence offers both a curated news/signals product (delivered through the web app and integrations) and a structured Datasets product that exports signal data for use in analytics platforms, data warehouses, or custom internal applications. The API allows programmatic access to signal events for teams that want to build custom workflows or integrate intelligence into proprietary systems.

How is Intellizence different from generic news monitoring tools like Google Alerts?

Unlike generic news monitoring, Intellizence structures raw news into typed business signals (e.g., 'Business Expansion' vs. 'C-Level Change' vs. 'Layoff') with company-level normalization. This means instead of receiving raw article links, you get structured data that can be routed into CRM workflows, prioritized by signal type, and aggregated across your entire account list. The AI classification also handles ambiguous or indirect mentions that keyword-based tools miss.

Does Intellizence have a Claude Code Skill or Claude Plugin?

Intellizence 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.