Explorium vs SalesIntel vs TheirStack

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

4.3

The signal-first pipeline generation platform with the highest human-verified direct dial and mobile coverage in the industry — combining 95%-accurate contact data, Bombora intent, and agentic AI workflows to surface ready-to-buy accounts

  • API
  • GDPR Compliance
22M+
Companies
100M+
People

Selected Customers

Honeywell • Autodesk • Cisco • TriNet • Pluralsight • Terminus • PathFactory • Mimecast • DataStax • CrowdStrike

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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

SalesIntel

  • Signal-Based Pipeline Generation

    SalesIntel's Signal360 tracks 30+ buying signals — from early indicators like funding rounds and leadership changes to late-stage signals like website visits and intent spikes — to surface accounts that are actively in-market and ready to engage.

  • Human-Verified Contact Outreach

    Access 54M+ human-verified mobile numbers and direct dials re-verified every 90 days by a dedicated research team, delivering 95% accuracy — reducing call bounce rates and enabling direct access to decision-makers without gatekeepers.

  • RevOps Data Enrichment

    Automatically enrich and refresh CRM records with verified contacts, firmographics, technographics, and intent signals via native Salesforce, HubSpot, and Marketo integrations — eliminating manual research and data decay in the revenue stack.

Signals powering these use cases

  • Bombora Intent Data
  • PredictiveIntent (proprietary)
  • Funding Rounds
  • Leadership Changes
  • Technology Install/Uninstall
  • Job Postings Growth
  • Website Visitor Activity
  • Acquisition & Merger News
  • Earnings Announcements
  • Headcount Growth Signals

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

SalesIntel Snapshot

  • Company coverage 2.0
  • Signals depth 4.9

TheirStack Snapshot

  • Company coverage 2.0
  • Signals depth 4.5
  • Freshness 4.5

Detailed Feature Comparison

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

Feature Comparison
Explorium
SalesIntel
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
REST API for contact search, company search, and contact append; technographic and firmographic data accessible via API; rate limits by plan tier
Full REST API; bulk export to Amazon S3 in Parquet/CSV
SLA
Up to 99.999% uptime; rate limit 200 requests/min per key
SOC 2 certified; 95% data accuracy SLA; enterprise uptime SLA available; SSO/SAML, RBAC, AES-256 encryption
Not publicly specified
Compliance
GDPR, SOC 2, CCPA, ISO 27001
SOC 2, GDPR, CCPA compliant; enterprise SSO/SAML and RBAC for access control
GDPR compliant; small team (5 employees)
Custom Entities
Real-time Lookups
Global Coverage
150M+ companies and 800M+ contacts across 150+ countries
40M+ companies; 200M+ contacts; strongest in North America; 14-country international coverage
13M+ companies globally across 33,000+ technologies
CRM Integration
Available on custom enterprise plans
Salesforce, HubSpot, Microsoft Dynamics, Zoho — native bidirectional integration with automatic field mapping and enrichment
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 application, Chrome extension, native CRM widgets (Salesforce, HubSpot), API, mobile-responsive interface
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, Marketo, Pardot, Zapier — native integrations for signal-triggered workflows
API, webhooks, S3 bulk export
Company coverage
150M+ company profiles
40M+ company profiles globally
13M+ companies
People coverage
800M+ people profiles (767M+ verified contacts)
200M+ B2B contacts with verified emails and mobile numbers
None — company-level only, no contact data
Geographic coverage
150+ countries
Primarily North America; international coverage available in 14 countries including UK, Germany, France, Netherlands, Belgium, Australia, Singapore, Canada; 7.2M+ international contacts
Global; strong US, EU, UK, APAC coverage
Data sources type
50+ data providers; proprietary ML enrichment; real-time web signals
Proprietary machine-learning system combined with human research team re-verification; Owler firmographics; Bombora intent data partnership; technographic data from third-party sources
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 schema; international data significantly sparser than North American coverage
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
Human re-verification of every direct dial and mobile number every 90 days; machine-learning enrichment runs 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, industry, revenue, employee count, tech stack, location, ownership, Owler news alerts (IPO, funding, acquisitions)
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 direct dial, verified mobile (54M+), work email, LinkedIn URL, job title, seniority, department, buying group identification
None — company-level data only
Enrichment categories
Firmographics, technographics, intent, funding, events, contact, website signals, lookalikes
Contact data (verified direct dials, mobiles, emails), firmographics, technographics, buyer intent, news signals, funding data
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
Funding rounds, leadership changes, technology installs/uninstalls, job posting growth, website visits, acquisition/merger news, earnings announcements
Tech stack changes, hiring velocity, buying intent signals from job descriptions
Technographics
Hiring and growth signals
Matching precision
98% company accuracy; 95% people accuracy
Company and contact matching via domain, firmographic attributes, and proprietary ID system; buying group identification for multi-stakeholder targeting
Evidence-backed — not inferred; each signal linked to source posting
Confidence scoring
Validation methodology
Advanced ML-based deduplication; 98%+ company accuracy; 95% people accuracy
Unique blend of machine intelligence and human verification; dedicated research team manually calls and tests every direct dial number; 95% accuracy guarantee backed by SLA
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 sync with Salesforce, HubSpot, and Marketo manages deduplication during enrichment workflows
-
API availability
QPS performance
Up to 100 QPS; 200 requests/min per API key
API rate limits available; specific QPS thresholds disclosed at the Enterprise level
-
CRM integrations
Custom plan — CRM integrations available
Salesforce, HubSpot, Microsoft Dynamics, Zoho CRM — native bidirectional sync
-
Data warehouse support
Custom plan — warehouse ingestion available
Bulk export available; no native Snowflake or Databricks marketplace listing
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
SOC 2 certified; GDPR and CCPA compliant; enterprise uptime SLA available; SSO/SAML and RBAC supported
-
Pricing model
Usage-based API credits with custom enterprise plans
Credit-based annual 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
Credits consumed per contact or company export; Research on Demand credits for human-verified requests; enrichment credits for CRM data fills
API credits per query; 12-month rollover; bulk export to S3 in Parquet/CSV
Tier structure
Free trial, Self-serve, Custom Enterprise
Individual ($99/mo, 100 credits), Individual Pro ($225/mo, 300 credits), Start-up ($18K/yr, 3 users), 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
No self-serve free trial; requires completing a sales demo; limited trial access provided post-demo at rep discretion
200 API credits/month free with no time limit
Budget commitment options
Custom enterprise plans with volume negotiation
Annual commitment required; multi-year discounts up to 25%; 3-year Start-up plan reduces to ~$13,500/yr
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
SalesIntel
TheirStack
Pricing Model
Usage-based with custom enterprise plans
Credit-based annual subscription; individual and team tiers
Credit-based subscription (API) or one-time credits (app)
Commitment Structure
One-time or custom; no mandatory annual lock-in on self-serve
Annual contracts required for all plans; monthly billing not available
Monthly subscription or one-time purchases; credits roll over 12 months
Payment Recurrence
One-time or custom
Annual
Monthly
Free Trial
30-day free trial with 100 credits; no credit card required
No self-serve free trial; demo required to access trial access; limited trial available post-demo
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 Enterprise plans with dedicated CSM, unlimited credits, Research on Demand allocations, and SLA agreements
Yes — custom pricing for high volume; bulk S3 delivery
Onboarding Model
Self-serve for API and MCP; dedicated onboarding for enterprise custom plans
Demo-led onboarding for all tiers; dedicated customer success for Start-up and above
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

Account Executive, Mid-Market B2B SaaS

"SalesIntel solves our biggest challenge — finding accurate, targeted contact data. The human-verified info and intent signals let us reach the right prospects at the right time, while the easy CRM integration saves hours on list-building. It's boosted our connect rates and made our outreach far more efficient."
Verified User for SalesIntel
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 SalesIntel better than TheirStack?

It depends on your use case. SalesIntel The signal-first pipeline generation platform with the highest human-verified direct dial and mobile coverage in the industry — combining 95%-accurate contact data, Bombora intent, and agentic AI workflows to surface ready-to-buy accounts 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 SalesIntel and TheirStack?

See the feature-by-feature comparison above. In short: SalesIntel focuses on The signal-first pipeline generation platform with the highest human-verified direct dial and mobile coverage in the industry — combining 95%-accurate contact data, Bombora intent, and agentic AI workflows to surface ready-to-buy accounts 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 SalesIntel cost compared to TheirStack?

SalesIntel pricing model: Credit-based annual subscription with tiered plans. TheirStack pricing model: Credit-based subscription.

Is SalesIntel 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 SalesIntel?

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 SalesIntel The signal-first pipeline generation platform with the highest human-verified direct dial and mobile coverage in the industry — combining 95%-accurate contact data, Bombora intent, and agentic AI workflows to surface ready-to-buy accounts

What is the difference between Explorium and SalesIntel?

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 SalesIntel focuses on The signal-first pipeline generation platform with the highest human-verified direct dial and mobile coverage in the industry — combining 95%-accurate contact data, Bombora intent, and agentic AI workflows to surface ready-to-buy accounts.

How much does Explorium cost compared to SalesIntel?

Explorium pricing model: Usage-based with custom plans. SalesIntel pricing model: Credit-based annual subscription with tiered plans.

Is Explorium or SalesIntel 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.

What makes SalesIntel's data accuracy different from other providers?

SalesIntel uses a unique blend of machine intelligence and human verification — every direct dial and mobile number in the database is manually called and tested by a dedicated research team on a 90-day cycle. This human re-verification process, combined with their Research on Demand service, produces a 95% accuracy guarantee on contact data. Most competitors rely primarily on automated verification or email bounce detection, which is less reliable for phone numbers.

What is Research on Demand and how does it work?

Research on Demand (RoD) is SalesIntel's proprietary human research service. If you cannot find a specific contact in the database, you can submit a request with basic details (company, title, name) and SalesIntel's research team will locate, call-verify, and deliver the contact — typically within a 2-hour SLA for Enterprise customers. RoD credits are allocated separately from standard contact credits and are available on Start-up and Enterprise plans.

How does SalesIntel's intent data work?

SalesIntel provides two layers of intent data: Bombora Intent, sourced from Bombora's co-op network of 5,000+ publisher sites tracking B2B content consumption across 7,000+ topics; and PredictiveIntent, SalesIntel's proprietary early-stage intent engine that identifies accounts showing early research behavior. Together these track 30+ buying signals across the full customer journey — from early research to late-stage purchase indicators.

Does SalesIntel offer a free trial?

SalesIntel does not offer a self-serve free trial. Access requires completing a sales demo first. After the demo, limited trial access may be provided at the sales rep's discretion. This is a notable friction point compared to competitors like Apollo or People Data Labs that offer self-serve free tiers.

How strong is SalesIntel's international coverage?

SalesIntel's primary strength is North American coverage. For international markets, SalesIntel offers data in 14 countries including the UK, Germany, France, Netherlands, Belgium, Australia, Singapore, and Canada — totaling 7.2M+ international contacts at 1M+ companies. Teams with a global prospecting mandate may find international depth weaker than specialized providers or ZoomInfo.

What CRM and sales tool integrations does SalesIntel support?

SalesIntel offers native bidirectional integrations with Salesforce, HubSpot, Microsoft Dynamics, and Zoho CRM for contact and enrichment sync. On the sales engagement side, native integrations include Outreach and Salesloft. Marketing automation integrations include Marketo and Pardot. The platform also provides a REST API and Chrome extension for manual lookups within LinkedIn and prospect websites.

Does SalesIntel have a Claude Code Skill or Claude Plugin?

SalesIntel 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.

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.