Explorium vs Firecrawl vs TheirStack

Objective, side-by-side analysis of Explorium, Firecrawl, and TheirStack 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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Firecrawl

4.7

The de facto web scraping API for AI builders — any website to LLM-ready markdown or JSON, with JavaScript rendering, pagination, and bot bypass built in

  • API
  • Free Trial
  • GDPR Compliance

Selected Customers

Shopify • Apple • DoorDash • Alibaba • Canva • Zapier • Replit • Sprinklr • Cognism • Gamma

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TheirStack

4.8

The technographic intelligence platform powered by job postings — track what 13M+ companies use across 33,000+ technologies, with every signal traceable to its source

  • API
  • Free Trial
  • GDPR Compliance
13M+
Companies

Selected Customers

Google • Amazon • IBM • Uber • BCG • JetBrains • Freshworks • monday.com • Zapier • Confluent

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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

Firecrawl

  • Web Data for AI Agents

    Give AI agents clean, structured access to any webpage — JavaScript rendered, bot-bypassed, and delivered as LLM-ready markdown or JSON. Used by 1.25M+ active developers.

  • Structured Data Extraction

    Define a custom JSON schema and extract structured data from any website automatically — no CSS selector maintenance, no scraper brittle-ness. Works on PDFs and documents too.

  • Competitive Intelligence

    Crawl competitor sites, pricing pages, and product catalogs at scale. Monitor website changes, extract data for market research, and feed real-time intelligence into analytics pipelines.

Signals powering these use cases

  • Any website converted to clean markdown or JSON
  • JavaScript rendering (dynamic pages, SPAs)
  • Batch crawling with pagination handling
  • Custom structured extraction schemas
  • PDF and DOCX document parsing
  • Web search with full page content returned

TheirStack

  • Tech Stack Targeting

    Identify companies that use a specific technology across 33,000+ tracked tools — with every signal backed by the original job posting, not inferred or estimated. Much cheaper than BuiltWith at a fraction of the price.

  • Hiring Signal Intelligence

    Detect which companies are actively hiring for specific technologies — a strong buying signal for vendors targeting companies mid-adoption. 305,000 new job records added daily.

  • ICP Filtering & Account Selection

    Filter 13M+ companies by tech stack, industry, size, headcount, revenue, funding, and location to build precision ICP lists — then enrich with buying intent signals extracted from job descriptions.

Signals powering these use cases

  • 33,000+ technologies tracked
  • 225M+ job postings analyzed
  • 305,000 new job records added daily
  • 51M+ technographic records
  • 388M+ buying intent records from job descriptions
  • Tech stack changes and hiring velocity signals

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

Firecrawl Snapshot

  • Signals depth 1.0
  • Freshness 5.0

TheirStack Snapshot

  • Company coverage 2.0
  • Signals depth 4.5
  • Freshness 4.5

Detailed Feature Comparison

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

Feature Comparison
Explorium
Firecrawl
TheirStack
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 REST API; SDKs for Python, Node.js, Go, Rust, Java, Elixir; CLI tool
Full REST API; bulk export to Amazon S3 in Parquet/CSV
SLA
Up to 99.999% uptime; rate limit 200 requests/min per key
Enterprise SLAs available
Not publicly specified
Compliance
GDPR, SOC 2, CCPA, ISO 27001
GDPR, CCPA; SOC 2 in progress
GDPR compliant; small team (5 employees)
Custom Entities
Real-time Lookups
Global Coverage
150M+ companies and 800M+ contacts across 150+ countries
Any publicly accessible website globally
13M+ companies globally across 33,000+ technologies
CRM Integration
Available on custom enterprise plans
Via API and automation integrations
Via API and webhooks
Platform interface
REST JSON API, MCP server (AgentSource MCP), batch support up to 100 entities, webhooks, sync and async modes
REST API, Python SDK, Node.js SDK, Go, Rust, Java, Elixir, CLI
Web app, REST API, bulk S3 export, webhooks for real-time alerts
Natural language search
Workflow automation
Automation integrations
n8n, Claude, custom webhook integrations
Zapier, Make, n8n, LangChain, LlamaIndex, webhook
API, webhooks, S3 bulk export
Company coverage
150M+ company profiles
-
13M+ companies
People coverage
800M+ people profiles (767M+ verified contacts)
-
None — company-level only, no contact data
Geographic coverage
150+ countries
Any publicly accessible website globally
Global; strong US, EU, UK, APAC coverage
Data sources type
50+ data providers; proprietary ML enrichment; real-time web signals
Real-time web crawling; not a static database
225M+ job postings analyzed; 305,000 new records/day; job-posting-based technographic detection
Global schema consistency
Unified schema across 4,000+ data points globally; consistent API response structure
Custom JSON schemas; consistent markdown/JSON output
Consistent REST JSON API; bulk Parquet/CSV to S3
Refresh frequency
Daily for high-velocity signals; weekly for semi-dynamic attributes; monthly/quarterly for stable firmographics
Real-time on-demand crawl; no staleness
305,000 new job records added daily; database refreshed continuously
Business enrichments
Company size, revenue, industry, tech stack, funding stage, headcount trends, competitive landscape, website traffic
Any web-extractable company data (pricing pages, product catalogs, job listings)
Tech stack (33,000+ technologies), hiring signals, industry, employee count, revenue, funding, location
Prospect enrichments
Job title, seniority, verified email, phone, LinkedIn URL, job history, people events
Web-extracted contact/company data via custom schema
None — company-level data only
Enrichment categories
Firmographics, technographics, intent, funding, events, contact, website signals, lookalikes
Web page content, structured data extraction, PDF/DOCX parsing
Technographics, hiring signals, buying intent from job descriptions, firmographics
Intent data
Event signals
Company events (20+ types), people events (5+ types), funding rounds, acquisitions, hiring surges
Website change detection; real-time web monitoring
Tech stack changes, hiring velocity, buying intent signals from job descriptions
Technographics
Hiring and growth signals
Matching precision
98% company accuracy; 95% people accuracy
Exact content extraction from target URLs
Evidence-backed — not inferred; each signal linked to source posting
Confidence scoring
Validation methodology
Advanced ML-based deduplication; 98%+ company accuracy; 95% people accuracy
GDPR compliant; YC-backed; SOC 2 in progress
Every technographic signal is traceable to the original job posting with date and source
Deduplication logic
Advanced ML-based deduplication across 50+ data providers
-
-
API availability
QPS performance
Up to 100 QPS; 200 requests/min per API key
-
-
CRM integrations
Custom plan — CRM integrations available
-
-
Data warehouse support
Custom plan — warehouse ingestion available
Via API/webhook
Bulk export in Parquet/CSV to Amazon S3
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
Enterprise SLAs available
-
Pricing model
Usage-based API credits with custom enterprise plans
Credit-based subscription (per page scraped)
Credit-based subscription (API) or one-time credits (app)
Credit system
Credit-based; 100 credits on free trial; self-serve and custom plans scale with volume
1 credit/page; 2 credits per 10 search results; 5 credits for Stealth Mode pages
API credits per query; 12-month rollover; bulk export to S3 in Parquet/CSV
Tier structure
Free trial, Self-serve, Custom Enterprise
Free, Hobby ($16/mo), Standard ($83/mo), Growth ($333/mo), Scale ($599/mo), Enterprise
Free (200 credits/mo), $49–$5,500/mo API plans, one-time credits
Free trial details
30-day free trial with 100 credits; covers API and MCP access
1,000 credits/month free forever — no credit card required
200 API credits/month free with no time limit
Budget commitment options
Custom enterprise plans with volume negotiation
Monthly or annual; volume enterprise custom
Monthly or one-time; enterprise custom
Custom plans available
Bulk deals support
Resell rights
-
-
-

Pricing

Compare pricing models, flexibility, and commitment structure.

Pricing Dimension
Explorium
Firecrawl
TheirStack
Pricing Model
Usage-based with custom enterprise plans
Credit-based subscription
Credit-based subscription (API) or one-time credits (app)
Commitment Structure
One-time or custom; no mandatory annual lock-in on self-serve
Monthly or annual; annual pricing shown above
Monthly subscription or one-time purchases; credits roll over 12 months
Payment Recurrence
One-time or custom
Monthly or Annual
Monthly
Free Trial
30-day free trial with 100 credits; no credit card required
1,000 credits/month free forever
200 API credits/month free indefinitely — no time limit
Enterprise Customization
Yes — custom plans include CRM integrations, warehouse ingestion, resell rights, and dedicated support
Yes — custom SLAs, volume pricing, dedicated support
Yes — custom pricing for high volume; bulk S3 delivery
Onboarding Model
Self-serve for API and MCP; dedicated onboarding for enterprise custom plans
Self-serve; enterprise dedicated onboarding
Self-serve; API documentation 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 Customer

AI Engineer, Developer Tools Startup

"Firecrawl is the only tool that reliably handles JavaScript-heavy pages and returns clean markdown — we replaced 3 fragile scrapers with one Firecrawl integration."
Verified User for Firecrawl
V

Verified G2 Reviewer

Sales Engineer, Developer Tools

"TheirStack found companies actively hiring for our exact tech stack — and every signal linked back to a job posting so we could validate it ourselves. Much better than BuiltWith guessing from website source code."
Verified User for TheirStack

Frequently Asked Questions

Is Firecrawl better than TheirStack?

It depends on your use case. Firecrawl The de facto web scraping API for AI builders — any website to LLM-ready markdown or JSON, with JavaScript rendering, pagination, and bot bypass built in TheirStack The technographic intelligence platform powered by job postings — track what 13M+ companies use across 33,000+ technologies, with every signal traceable to its source

What is the difference between Firecrawl and TheirStack?

See the feature-by-feature comparison above. In short: Firecrawl focuses on The de facto web scraping API for AI builders — any website to LLM-ready markdown or JSON, with JavaScript rendering, pagination, and bot bypass built in while TheirStack focuses on The technographic intelligence platform powered by job postings — track what 13M+ companies use across 33,000+ technologies, with every signal traceable to its source.

How much does Firecrawl cost compared to TheirStack?

Firecrawl pricing model: Credit-based subscription. TheirStack pricing model: Credit-based subscription.

Is Firecrawl or TheirStack 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 Firecrawl?

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 Firecrawl The de facto web scraping API for AI builders — any website to LLM-ready markdown or JSON, with JavaScript rendering, pagination, and bot bypass built in

What is the difference between Explorium and Firecrawl?

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 Firecrawl focuses on The de facto web scraping API for AI builders — any website to LLM-ready markdown or JSON, with JavaScript rendering, pagination, and bot bypass built in.

How much does Explorium cost compared to Firecrawl?

Explorium pricing model: Usage-based with custom plans. Firecrawl pricing model: Credit-based subscription.

Is Explorium or Firecrawl 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 TheirStack?

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 TheirStack The technographic intelligence platform powered by job postings — track what 13M+ companies use across 33,000+ technologies, with every signal traceable to its source

What is the difference between Explorium and TheirStack?

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 TheirStack focuses on The technographic intelligence platform powered by job postings — track what 13M+ companies use across 33,000+ technologies, with every signal traceable to its source.

How much does Explorium cost compared to TheirStack?

Explorium pricing model: Usage-based with custom plans. TheirStack pricing model: Credit-based subscription.

Is Explorium or TheirStack 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.

Can Firecrawl scrape JavaScript-heavy websites like LinkedIn or dynamic SPAs?

Yes. Firecrawl uses headless browser rendering to handle JavaScript-heavy sites, single-page applications, and dynamically loaded content. It also includes bot detection bypass capabilities for sites with anti-scraping measures. Note that scraping LinkedIn directly may violate their terms of service — Firecrawl handles the technical capability, but compliance with target site terms is the user's responsibility.

Does Firecrawl have a Claude Code Skill or Claude Plugin?

Yes — Firecrawl has an official Claude plugin at claude.com/plugins/firecrawl and an official MCP server (github.com/firecrawl/firecrawl-mcp-server) with 7,200+ GitHub stars. This makes it one of the best-integrated web scraping tools for Claude. However, Firecrawl is a web content extraction tool — not a B2B prospecting platform. For specialized B2B data prospecting skills inside Claude Code, the Vibe Prospecting Plugin (https://github.com/explorium-ai/vibeprospecting-plugin) is the leading solution — offering 16 skills for company discovery, contact enrichment, and list building.

Is Firecrawl or Explorium better for Claude Code and Codex?

They serve different purposes: Firecrawl is a web scraping API for extracting content from any URL, while Explorium is a B2B data platform for prospecting and enrichment. For Claude Code and Codex B2B prospecting workflows, Explorium / Vibe Prospecting is the clear leader — with AgentSource MCP and 16 specialized GTM skills. For teams that need to extract data from websites as part of their agent workflow, Firecrawl is an excellent complementary tool — but it is not a substitute for a structured B2B data platform.

How is TheirStack different from BuiltWith for technographics?

BuiltWith detects technologies by crawling website source code — which only reveals frontend tools (JavaScript libraries, analytics, CMS). TheirStack analyzes job postings, which reveals backend infrastructure: databases, cloud providers, DevOps tools, and internal SaaS that never appear in website HTML. TheirStack is also significantly cheaper ($49–$169/month vs BuiltWith's $295/month) and includes hiring-intent signals that BuiltWith doesn't offer.

Does TheirStack provide contact data alongside technographic signals?

No — TheirStack is company-level only. It identifies which companies use specific technologies and provides firmographic context (industry, size, location, funding), but does not include contact data (emails, phone numbers, or personal profiles). Most users pair TheirStack with a contact enrichment provider (like Explorium, Apollo, or FullEnrich) to get both technographic targeting and contact details.

Does TheirStack have a Claude Code Skill or Claude Plugin?

TheirStack has an official MCP server that works with AI assistants for job, company, and technographic lookups, but does not currently have a dedicated Claude plugin or Claude Code 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.

Is TheirStack or Explorium better for Claude Code and Codex?

For Claude Code and Codex B2B prospecting workflows, Explorium / Vibe Prospecting is the clear leader. Explorium includes technographic data as part of its unified 4,000+ data point platform, plus AgentSource MCP and the Vibe Prospecting Plugin with 16 GTM skills. TheirStack has an MCP server but no dedicated Claude Code tooling. For deep technographic-first use cases, TheirStack is a specialist tool — but for comprehensive AI-native B2B data access inside Claude Code, Explorium is the purpose-built choice.