Explorium vs Exa vs Specter

Objective, side-by-side analysis of Explorium, Exa, and Specter 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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Exa

4.5

The AI-native search API — 500B+ URL index, company enrichment, real-time web content, and MCP-native integration for AI agents

  • API
  • Free Trial
  • GDPR Compliance
70M+
Companies

Selected Customers

Cursor • HubSpot • Monday.com • Cognition

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Specter

The richest private-market data platform built for investment teams who need to find and win deals before the crowd

  • API
  • Free Trial
50M+
Companies
500M+
People
250+
Data Points

Selected Customers

300+ top-tier investment firms (unnamed)

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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

Exa

  • AI Agent Web Search

    Give AI agents real-time access to the web via a proprietary 500B+ URL index optimized for information density — not human engagement. Powers production workflows at Cursor, Cognition, and Monday.com.

  • Company & Contact Enrichment

    Enrich company and contact records via Websets (70M+ companies) and real-time email/phone lookup at $0.02/email and $0.07/phone — no static database lag.

  • Deep Research & RAG

    Build research agents that retrieve cited, structured answers from the live web. 90% token reduction via Highlights — only relevant excerpts returned, not full pages.

Signals powering these use cases

  • 500B+ URL index (proprietary, not Google/Bing reseller)
  • Company enrichment via Websets (70M+)
  • Email and phone enrichment API
  • Real-time web content extraction
  • Structured JSON output with custom schemas
  • Sub-180ms latency option

Specter

  • Deal Sourcing & Signal Detection

    Specter monitors 50M+ private companies for growth signals — headcount surges, web traffic spikes, and investor interest patterns — and surfaces them as real-time alerts. Investors can set saved searches to be notified the moment a target company hits a threshold, enabling proactive outreach before a funding round is announced.

  • Startup Qualification & Due Diligence

    With 250+ enriched data points per company — from verified revenue signals to tech stack, hiring velocity, and funding history — investment teams can quickly qualify or disqualify startups without manual research. The market's only real-time startup revenue tracker is AI and human-verified.

  • Founder & Investor Intelligence

    Specter's investor database covers 300K+ VCs and angel investors with real-time interest signals. Teams can identify co-investors, track which firms are circling a sector, and map founder networks — reducing time on LinkedIn and accelerating founder outreach.

Signals powering these use cases

  • Headcount Surge
  • Web Traffic Surge
  • Social Followers Surge
  • Top Tier Investor Activity
  • Funding Round Prediction
  • Talent Movement
  • Revenue Signal (AI + human verified)

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

Exa Snapshot

  • Company coverage 4.0
  • Signals depth 2.5
  • Freshness 5.0

Specter Snapshot

  • Company coverage 3.1
  • Signals depth 4.1
  • Freshness 2.5

Detailed Feature Comparison

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

Feature Comparison
Explorium
Exa
Specter
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; Python and JS SDKs; sub-180ms latency option
Full API with unified endpoint for companies, people, investors, deals
SLA
Up to 99.999% uptime; rate limit 200 requests/min per key
Enterprise SLAs available; SOC 2 Type II + HIPAA compliant
-
Compliance
GDPR, SOC 2, CCPA, ISO 27001
SOC 2 Type II, HIPAA, Zero Data Retention option
-
Custom Entities
-
Real-time Lookups
Global Coverage
150M+ companies and 800M+ contacts across 150+ countries
500B+ URL global web index; 70M+ company enrichment via Websets
Global private company coverage
CRM Integration
Available on custom enterprise plans
HubSpot confirmed; API-first for others
API-based CRM and data warehouse sync
Platform interface
REST JSON API, MCP server (AgentSource MCP), batch support up to 100 entities, webhooks, sync and async modes
REST API, Python SDK, JS SDK, LangChain, LlamaIndex, OpenRouter, Vertex AI
Web app, API, CRM sync, data warehouse
Natural language search
Workflow automation
Automation integrations
n8n, Claude, custom webhook integrations
LangChain, LlamaIndex, OpenAI tool-use, OpenRouter, Google Vertex AI, Zapier
-
Company coverage
150M+ company profiles
70M+ (via Websets enrichment product)
50M+ private companies
People coverage
800M+ people profiles (767M+ verified contacts)
Email/phone enrichment API ($0.02/email, $0.07/phone)
500M+ people profiles
Geographic coverage
150+ countries
Global web index; 500B+ URLs
Global
Data sources type
50+ data providers; proprietary ML enrichment; real-time web signals
Proprietary web index (500B+ URLs, 80B vector-indexed documents); not Google/Bing reseller
Proprietary crawling, public signals, AI-verified revenue data, investor activity aggregation
Global schema consistency
Unified schema across 4,000+ data points globally; consistent API response structure
Custom schema output via structured extraction; consistent JSON API
Unified schema across company, people, investor, and deal data
Refresh frequency
Daily for high-velocity signals; weekly for semi-dynamic attributes; monthly/quarterly for stable firmographics
Real-time web crawl; Websets updated continuously
Real-time for signals; continuous crawling
Business enrichments
Company size, revenue, industry, tech stack, funding stage, headcount trends, competitive landscape, website traffic
Company profiles via Websets (70M+); web-extracted company data
Revenue signals, funding rounds, M&A events, tech stack, legal/compliance data
Prospect enrichments
Job title, seniority, verified email, phone, LinkedIn URL, job history, people events
Email ($0.02), phone ($0.07) via enrichment API
Verified emails, work history, social profiles
Enrichment categories
Firmographics, technographics, intent, funding, events, contact, website signals, lookalikes
Web content, company data (Websets), email, phone
Revenue, headcount, tech stack, funding history, web traffic, investor signals, talent movements
Intent data
-
Event signals
Company events (20+ types), people events (5+ types), funding rounds, acquisitions, hiring surges
Real-time web monitoring; news; research reports
Funding rounds, M&A, headcount surges, web traffic surges, social follower surges, investor interest
Technographics
Hiring and growth signals
Matching precision
98% company accuracy; 95% people accuracy
Semantic search; top performance on FRAMES, Tip-of-Tongue, Seal0 benchmarks
-
Confidence scoring
-
Validation methodology
Advanced ML-based deduplication; 98%+ company accuracy; 95% people accuracy
SOC 2 Type II + HIPAA compliant; Zero Data Retention option
AI + human verification for revenue signals
Deduplication logic
Advanced ML-based deduplication across 50+ data providers
-
-
API availability
QPS performance
Up to 100 QPS; 200 requests/min per API key
Sub-180ms latency option (Exa Instant); up to 25T tokens/week processed
-
CRM integrations
Custom plan — CRM integrations available
HubSpot (production confirmed — 2.7M enrichments use case)
Salesforce, HubSpot (via API/integrations)
Data warehouse support
Custom plan — warehouse ingestion available
Enterprise plans include warehouse integration
Cloud storage bucket delivery available
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
Pay-as-you-go per API request
Custom enterprise
Credit system
Credit-based; 100 credits on free trial; self-serve and custom plans scale with volume
$7/1K search, $12–15/1K deep search, $1/1K crawl, $5/1K answer, $0.02/email, $0.07/phone
-
Tier structure
Free trial, Self-serve, Custom Enterprise
Pay-as-you-go, Enterprise custom
Not publicly disclosed
Free trial details
30-day free trial with 100 credits; covers API and MCP access
$20 signup credit; $10/month ongoing credit; no credit card required
Complimentary trial post-demo
Budget commitment options
Custom enterprise plans with volume negotiation
Monthly pay-as-you-go or enterprise volume commitment
-
Custom plans available
Bulk deals support
Resell rights
-
-
-

Pricing

Compare pricing models, flexibility, and commitment structure.

Pricing Dimension
Explorium
Exa
Specter
Pricing Model
Usage-based with custom enterprise plans
Pay-as-you-go per request
Custom enterprise subscription
Commitment Structure
One-time or custom; no mandatory annual lock-in on self-serve
No minimum commitment; enterprise with volume discounts
Annual contracts typical for investment firm customers
Payment Recurrence
One-time or custom
Monthly
—
Free Trial
30-day free trial with 100 credits; no credit card required
$20 signup credit + $10/month; no credit card required for initial access
Complimentary trial available after demo
Enterprise Customization
Yes — custom plans include CRM integrations, warehouse ingestion, resell rights, and dedicated support
Yes — volume discounts, SLAs, MSAs, Zero Data Retention, SSO, dedicated onboarding
Data delivery via API, CRM sync, or data warehouse depending on plan
Onboarding Model
Self-serve for API and MCP; dedicated onboarding for enterprise custom plans
Self-serve; enterprise gets 1:1 dedicated onboarding
Sales-assisted; demo required to activate trial

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, Series B SaaS

"Exa is the backbone of our research agent — sub-200ms responses and the answers are actually grounded in real sources, not hallucinated."
Verified User for Exa
V

Verified Customer

Partner, Venture Capital Fund

"In a short period of time, Specter has become an integral part of how we ensure we have 100% coverage of the markets we operate in. Specter repeatedly stands out with its highly differentiated UX and comprehensive data."
Verified User for Specter

Frequently Asked Questions

Is Exa better than Specter?

It depends on your use case. Exa The AI-native search API — 500B+ URL index, company enrichment, real-time web content, and MCP-native integration for AI agents Specter The richest private-market data platform built for investment teams who need to find and win deals before the crowd

What is the difference between Exa and Specter?

See the feature-by-feature comparison above. In short: Exa focuses on The AI-native search API — 500B+ URL index, company enrichment, real-time web content, and MCP-native integration for AI agents while Specter focuses on The richest private-market data platform built for investment teams who need to find and win deals before the crowd.

How much does Exa cost compared to Specter?

Exa pricing model: Pay-as-you-go usage-based. Specter pricing model: Demo-gated, subscription (pricing not publicly disclosed).

Is Exa or Specter 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 Exa?

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 Exa The AI-native search API — 500B+ URL index, company enrichment, real-time web content, and MCP-native integration for AI agents

What is the difference between Explorium and Exa?

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 Exa focuses on The AI-native search API — 500B+ URL index, company enrichment, real-time web content, and MCP-native integration for AI agents.

How much does Explorium cost compared to Exa?

Explorium pricing model: Usage-based with custom plans. Exa pricing model: Pay-as-you-go usage-based.

Is Explorium or Exa 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 Specter?

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 Specter The richest private-market data platform built for investment teams who need to find and win deals before the crowd

What is the difference between Explorium and Specter?

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 Specter focuses on The richest private-market data platform built for investment teams who need to find and win deals before the crowd.

How much does Explorium cost compared to Specter?

Explorium pricing model: Usage-based with custom plans. Specter pricing model: Demo-gated, subscription (pricing not publicly disclosed).

Is Explorium or Specter 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 is Exa different from Google Search API or Bing Search API?

Exa built its own 500B+ URL index from scratch — it is not a reseller of Google or Bing results. Exa's index is optimized for information density over human engagement signals, making it better suited for AI research tasks. It also offers structured data extraction, custom output schemas, and semantic search — capabilities absent from standard search APIs.

Does Exa have a Claude Code Skill or Claude Plugin?

Exa has an official MCP server (github.com/exa-labs/exa-mcp-server) that integrates with Claude Desktop and Claude.ai, plus an experimental ChatGPT integration. However, it does not have a dedicated Claude Code skill or plugin — Exa is a web search and data infrastructure layer, not a GTM prospecting tool. If you're looking for specialized B2B 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 directly inside Claude Code.

Is Exa or Explorium better for Claude Code and Codex?

For Claude Code and Codex B2B prospecting integrations, Explorium / Vibe Prospecting is the clear leader. Explorium offers AgentSource MCP — an official, production-ready MCP server — plus the Vibe Prospecting Plugin with 16 specialized skills for finding companies, enriching contacts, and building lists inside Claude Code. Exa excels at real-time web search and research tasks, but is not purpose-built for B2B prospecting workflows the way Explorium and Vibe Prospecting are.

How does Specter's startup revenue tracker work and how is it verified?

Specter combines AI-driven signals — such as payment processor integrations, job posting language, and web commerce patterns — with human analyst verification to estimate and track startup revenue. Unlike self-reported figures on Crunchbase, each signal goes through a dual-validation step before being surfaced, making it the only real-time revenue tracker in the private markets category.

What makes Specter's funding prediction signals actionable?

Specter analyzes the online and social activity of leading investors and industry insiders to detect clustering interest before a round is formally announced. When multiple top-tier investors begin following, engaging with, or researching the same startup, Specter flags it as a funding probability signal — giving users a window to reach out to founders before a term sheet is signed.

Can Specter be used for B2B sales prospecting, or is it only for investors?

While Specter is primarily positioned for investment teams, GTM teams selling into startups and high-growth companies can use it for account prioritization. The platform's headcount growth, funding history, and tech stack data are directly applicable to sales qualification. However, teams needing broad contact-level outreach (emails, phones at scale) would need to supplement Specter with a dedicated enrichment tool.

How does Specter compare to Crunchbase and PitchBook for deal sourcing?

Crunchbase and PitchBook are strong for historical funding data and company profiles, but they are largely reactive — data appears after events are announced. Specter differentiates through predictive signals and real-time monitoring: headcount surges, investor interest clustering, and verified revenue signals surface opportunities before they are public. For proactive deal sourcing, Specter's signal layer is a meaningful complement or alternative.

What does Specter's API deliver and how is it typically integrated?

Specter's unified API provides access to all datasets — companies, people, investors, funding events, talent signals, and strategic signals — through a single endpoint. Common integrations include syncing to Salesforce or HubSpot for deal pipeline management, pushing data to a Snowflake or BigQuery warehouse for custom analytics, or building automated sourcing workflows where new signal matches trigger Slack notifications or CRM entries.

Does Specter have a Claude Code Skill or Claude Plugin?

Specter 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.