Explorium vs LeadIQ vs TheirStack

Objective, side-by-side analysis of Explorium, LeadIQ, 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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LeadIQ

4.2

The prospecting platform built for modern sales reps — LinkedIn-native data capture, AI email writing, and champion tracking in one workflow

  • API
  • Free Trial
  • GDPR Compliance

Selected Customers

Salesforce • HubSpot • Outreach • Salesloft

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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

LeadIQ

  • One-Click LinkedIn Prospecting

    The LeadIQ Chrome extension sits on top of LinkedIn and LinkedIn Sales Navigator, letting reps capture verified email addresses and phone numbers with a single click and sync them directly to Salesforce, HubSpot, Outreach, or Salesloft. Users report saving 10–15 hours per BDR per month previously spent on manual data entry.

  • Champion Tracking

    LeadIQ monitors contacts who have previously engaged with or purchased from your team, alerting reps when they change companies. Each alert includes the new employer, role, and updated contact details, along with a suggested outreach angle — turning job changes into a warm pipeline source without any manual research.

  • AI-Powered Email Personalization

    Scribe, LeadIQ's built-in AI email writer, generates personalized outbound emails based on the prospect's LinkedIn profile, company news, and job title. It reduces time-per-email for reps doing high-volume outreach and integrates directly into Outreach and Salesloft sequences.

Signals powering these use cases

  • Champion Tracking — real-time alerts when buyers change companies
  • Job change detection with new employer, role, and updated contact details
  • AI Scribe — personalized email generation based on prospect profile
  • Multi-source email enrichment querying 9 data providers for higher accuracy
  • One-click LinkedIn capture with immediate CRM sync

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

LeadIQ Snapshot

  • Signals depth 1.8
  • Freshness 2.7

TheirStack Snapshot

  • Company coverage 2.0
  • Signals depth 4.5
  • Freshness 4.5

Detailed Feature Comparison

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

Feature Comparison
Explorium
LeadIQ
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 API; Salesforce Managed Package for native CRM enrichment
Full REST API; bulk export to Amazon S3 in Parquet/CSV
SLA
Up to 99.999% uptime; rate limit 200 requests/min per key
-
Not publicly specified
Compliance
GDPR, SOC 2, CCPA, ISO 27001
GDPR and CCPA compliant; SOC 2 certified
GDPR compliant; small team (5 employees)
Custom Entities
Real-time Lookups
Global Coverage
150M+ companies and 800M+ contacts across 150+ countries
Global; strongest in North America and EMEA
13M+ companies globally across 33,000+ technologies
CRM Integration
Available on custom enterprise plans
Salesforce, HubSpot, Pipedrive; Outreach, Salesloft, Groove by Clari
Via API and webhooks
Platform interface
REST JSON API, MCP server (AgentSource MCP), batch support up to 100 entities, webhooks, sync and async modes
Web app, Chrome extension (LinkedIn-native), API
Web app, REST API, bulk S3 export, webhooks for real-time alerts
Natural language search
Workflow automation
Automation integrations
n8n, Claude, custom webhook integrations
Outreach, Salesloft, Groove by Clari, Zapier, Workato, Clay
API, webhooks, S3 bulk export
Company coverage
150M+ company profiles
-
13M+ companies
People coverage
800M+ people profiles (767M+ verified contacts)
Multi-source enrichment querying 9 data providers; stated 85% global mobile match rate
None — company-level only, no contact data
Geographic coverage
150+ countries
Global coverage; strong in North America and EMEA
Global; strong US, EU, UK, APAC coverage
Data sources type
50+ data providers; proprietary ML enrichment; real-time web signals
Multi-provider aggregation (9 sources); real-time LinkedIn profile verification; proprietary data layer
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
Consistent output: verified email, phone, job title, company, LinkedIn profile
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 verification at point of capture via Chrome extension; job change alerts updated continuously
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
Company name, domain, LinkedIn company page
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
Verified work email, mobile phone, direct dial, job title, LinkedIn profile, job change signals
None — company-level data only
Enrichment categories
Firmographics, technographics, intent, funding, events, contact, website signals, lookalikes
Email enrichment, phone enrichment, champion tracking, AI email generation, account prospecting
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
Champion Tracking: job change alerts with new employer, role, and contact details
Tech stack changes, hiring velocity, buying intent signals from job descriptions
Technographics
Hiring and growth signals
Matching precision
98% company accuracy; 95% people accuracy
85% stated global mobile match rate; email accuracy varies by industry and company size
Evidence-backed — not inferred; each signal linked to source posting
Confidence scoring
Validation methodology
Advanced ML-based deduplication; 98%+ company accuracy; 95% people accuracy
Multi-source aggregation across 9 providers with confidence scoring; real-time LinkedIn profile check at capture
Every technographic signal is traceable to the original job posting with date and source
Deduplication logic
Advanced ML-based deduplication across 50+ data providers
CRM duplicate checking before sync to prevent duplicate record creation in Salesforce and HubSpot
-
API availability
QPS performance
Up to 100 QPS; 200 requests/min per API key
-
-
CRM integrations
Custom plan — CRM integrations available
Salesforce, HubSpot, Pipedrive
-
Data warehouse support
Custom plan — warehouse ingestion available
-
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
-
-
Pricing model
Usage-based API credits with custom enterprise plans
Per-user subscription
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
Universal credits: 1 credit = 1 verified email; 10 credits = 1 phone number; credits do not roll over (expire monthly or annually)
API credits per query; 12-month rollover; bulk export to S3 in Parquet/CSV
Tier structure
Free trial, Self-serve, Custom Enterprise
Free, Essential ($39/user/mo annual), Pro ($79/user/mo annual), Enterprise (custom)
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
Permanent free plan: 50 verified emails, 5 mobile numbers, 40 Scribe AI emails, 10 tracked accounts per month
200 API credits/month free with no time limit
Budget commitment options
Custom enterprise plans with volume negotiation
Monthly or annual billing; per-user pricing scales linearly with team size
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
LeadIQ
TheirStack
Pricing Model
Usage-based with custom enterprise plans
Per-user subscription with monthly credit allocations
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 provides meaningful discount (~15–20%)
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
Permanent free plan: 50 verified emails + 5 mobile numbers/month + 40 AI-generated Scribe emails + 10 tracked accounts
200 API credits/month free indefinitely — no time limit
Enterprise Customization
Yes — custom plans include CRM integrations, warehouse ingestion, resell rights, and dedicated support
Custom pricing; dedicated account management; custom integrations; typically $15,000–$30,000/year for mid-size orgs
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 for Essential and Pro; dedicated onboarding and CSM for Enterprise
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 G2 Reviewer

Senior Account Executive, Mid-Market SaaS Company

"I like how I am able to export contacts directly into Outreach sequences from LeadIQ without having any manual actions to perform in Salesforce. The direct integration to Groove has been a game changer for our org. The job change tracking is incredibly valuable — I've closed deals with former champions who moved to new companies and remembered us."
Verified User for LeadIQ
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 LeadIQ better than TheirStack?

It depends on your use case. LeadIQ The prospecting platform built for modern sales reps — LinkedIn-native data capture, AI email writing, and champion tracking in one workflow 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 LeadIQ and TheirStack?

See the feature-by-feature comparison above. In short: LeadIQ focuses on The prospecting platform built for modern sales reps — LinkedIn-native data capture, AI email writing, and champion tracking in one workflow 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 LeadIQ cost compared to TheirStack?

LeadIQ pricing model: Per-user subscription with monthly credit allocations. TheirStack pricing model: Credit-based subscription.

Is LeadIQ 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 LeadIQ?

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 LeadIQ The prospecting platform built for modern sales reps — LinkedIn-native data capture, AI email writing, and champion tracking in one workflow

What is the difference between Explorium and LeadIQ?

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 LeadIQ focuses on The prospecting platform built for modern sales reps — LinkedIn-native data capture, AI email writing, and champion tracking in one workflow.

How much does Explorium cost compared to LeadIQ?

Explorium pricing model: Usage-based with custom plans. LeadIQ pricing model: Per-user subscription with monthly credit allocations.

Is Explorium or LeadIQ 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.

How does LeadIQ's Champion Tracking work, and what triggers an alert?

Champion Tracking monitors contacts you designate — typically buyers who have engaged with or purchased from your team — and checks for employment changes on an ongoing basis. When LeadIQ detects that a tracked contact has moved to a new company, it sends an alert with their new employer name, job title, updated email address, and a suggested outreach angle. The feature is designed to capture the window when a champion has just joined a new company and is in active buying mode — typically the first 90 days in a new role.

Why do users report poor phone number quality from LeadIQ?

Phone number accuracy is LeadIQ's most frequently cited weakness on G2. The issues typically fall into three categories: outdated numbers that haven't been refreshed since a contact changed roles, personal cell numbers rather than direct business lines, and numbers that connect to the wrong person entirely. LeadIQ states an 85% global mobile match rate, but user experiences vary significantly by industry, company size, and geography. Phone data tends to be more reliable for larger companies in North America and less reliable for SMBs, international markets, and niche verticals.

What is LeadIQ Scribe and how does it differ from other AI email tools?

Scribe is LeadIQ's built-in AI email writer that generates personalized cold email drafts at the point of prospect capture. Unlike standalone AI writing tools, Scribe uses the prospect's LinkedIn profile, recent company news, job title, and company context that LeadIQ has already surfaced — so the personalization is grounded in live prospect data rather than generic prompts. It is integrated directly into Outreach and Salesloft workflows, allowing reps to go from LinkedIn profile to personalized email draft in a single workflow without switching tools.

Do LeadIQ credits roll over if I don't use them all in a month?

No. On monthly billing plans, unused credits expire at the end of each calendar month. On annual plans, unused credits expire at the end of the subscription year. This is a meaningful cost consideration for teams with inconsistent outreach cadences — if your team runs a large prospecting push in Q1 and slows down in Q2, the credits from slow months are forfeited. Teams that anticipate usage variability should factor this into plan selection or consider negotiating a custom arrangement at Enterprise tier.

How does LeadIQ handle data accuracy when querying multiple providers?

LeadIQ queries up to 9 third-party data providers simultaneously when capturing a contact and uses a confidence scoring system to surface the highest-probability email address. When multiple providers agree on the same email, the confidence score is higher; when results conflict, the score is lower and LeadIQ flags the result for the user. This multi-source approach increases the likelihood of finding a valid email compared to single-source tools, but it also means that the accuracy ceiling is bounded by the quality of the underlying provider network — which varies by geography and industry.

Does LeadIQ have a Claude Code Skill or Claude Plugin?

Not officially — LeadIQ 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 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.