ZoomInfo has emerged as one of the most influential players in the B2B sales intelligence and go-to-market (GTM) data industry, reshaping how businesses discover, target, and engage potential customers.
About 15 years ago, finding useful data was slow and difficult. It involved a lot of manual research, working with spreadsheets, using outdated directories, and doing cold outreach. This process has now evolved into a data-driven, AI-assisted revenue engine.
Today, modern sales and marketing teams expect instant access to verified contact data, firmographics, technographics, buying-intent signals, and workflow automation, all integrated directly into their CRM and marketing stacks.
ZoomInfo operates at the center of this transformation. It has a massive B2B database of over 320 million professional contacts and 104 million company profiles. [1]
Its tools are widely used across sales, marketing, recruiting, and revenue operations, particularly by mid-market and enterprise organizations running complex B2B sales motions. In many revenue teams, ZoomInfo data influences pipeline generation, outbound sales productivity, account-based marketing, and customer acquisition costs.
The platform serves more than 35,000 companies worldwide and generates an annual revenue of $1.24 billion.
However, the same forces that fueled ZoomInfo’s rise (exploding data volumes and competition for buyer attention) have also given rise to a rapidly expanding ecosystem of ZoomInfo competitors.
These competitors span multiple segments, from contact databases and sales intelligence platforms to enrichment APIs and CRM-native data solutions. While some rivals focus on affordability, others compete on data freshness, technographic depth, or AI-driven prospecting workflows.
Did you know?The sales intelligence market is projected to reach $8.19 billion by 2030, growing at a CAGR of 13.12%. North America continues to lead in spending, while the Asia-Pacific region is growing the fastest. [2]
Table of Contents
16. SalesIntel
Launched in 2018Headquarters: Tysons, Virginia, USA
Database: 250 million+ B2B decision-makers contacts
Competitive Edge: AI-powered intent & Predictive signals
SalesIntel delivers high-quality, human-verified contact and company data to help accelerate prospecting, pipeline creation, and deal conversion.
Unlike many data tools that rely solely on automated scraping or crowdsourcing, SalesIntel emphasizes human verification to achieve ~95 % data accuracy across its contact database.
The platform combines email addresses, direct dials (including mobile numbers), firmographics, technographics, and intent signals to give teams a richer, more actionable view of prospects. Its database includes access to hundreds of millions of contacts, including over 54 million verified mobile numbers.
The platform also offers Research-on-Demand, where a team of human researchers verifies or finds contacts that automated tools may miss. This improves data completeness and makes it easier to reach hard-to-find decision-makers.
15. Hunter.io
Launched in 2015Headquarters: Wilmington, Delaware, USA
Database: 117 million+ Professional email addresses
Competitive Edge: Flexible API & bulk access
Hunter.io is a lightweight B2B contact discovery platform known for its email-first approach to prospecting and outreach. It scours the public web daily, crawling millions of pages and indexing business contact data. More specifically, it crawls 90 million webpages daily and indexes over 550 public data sources.
Hunter.io provides tools like Email Finder (to locate email addresses by entering a person’s name and company domain), Email Verifier (to verify deliverability and reduce spam/bounce issues), and Domain Search (to discover all email contacts associated with a company domain).
It also has a Chrome extension to extract email addresses directly while browsing company sites — a huge productivity boost for sales reps and recruiters doing research on the fly. Over 6 million users trust this platform for lead generation and email outreach.
14. Demandbase
Headquarters: San Francisco, California, USA
Database: 160 million+ professionals at 104 million companies
Competitive Edge: AI-powered intent & Predictive signals
Demandbase is an established platform in the Account-Based Marketing (ABM) and account-based go-to-market (GTM) intelligence space. Unlike contact-centric sales intelligence tools, Demandbase is built to help B2B businesses identify, prioritize, and engage entire buying accounts, rather than individual leads.
The platform analyzes around 1 trillion interactions each month from B2B companies, covering 4 billion IP addresses and 36 billion B2B website visits. This helps identify which accounts are likely to be in the market even before they actively engage, giving sales teams a clear advantage in prioritizing leads. [3]
In fact, it focuses strongly on data quality by validating information across more than 40,000 sources. This multi-source approach helps ensure accurate and relevant account and buyer insights.
13. Kaspr
Launched in 2018Headquarters: Paris, France
Database: 500 million+ phone numbers and email addresses
Competitive Edge: LinkedIn-first prospecting, Simple UX
Kaspr is built specifically for LinkedIn-native prospecting and outbound execution. It focuses on real-time contact enrichment directly within LinkedIn workflows, allowing sales professionals to convert profile views into actionable leads instantly.
This design philosophy makes Kaspr especially popular among SDRs, recruiters, and growth teams operating in fast-paced outbound environments. It makes it easy to capture contacts, push them into CRM systems, and trigger outreach sequences.
Its data is aggregated and verified from 150+ trusted sources. The platform is widely used in high-volume outbound and recruiting workflows, where speed matters and personalization relies more on LinkedIn context than on deep account-level analysis.
Distinctive for its European-centric coverage, Kaspr also emphasizes compliance with major data protection frameworks like GDPR and CCPA, helping customers operate confidently in regulated markets where data privacy is critical.
12. Lead411
Headquarters: Boulder, Colorado, USA
Database: 450 million contacts across 20 million companies
Competitive Edge: Sales trigger intelligence
Lead411 is a B2B sales intelligence and contact data platform that combines verified contact information with actionable buying signals. It emphasizes data freshness, trigger events, and intent-like indicators that help sales teams reach prospects at the right moment.
A defining characteristic of Lead411 is its focus on sales trigger data. It tracks signals such as job changes, hiring activity, funding events, and company growth trends, enabling users to prioritize accounts that are more likely to be in an active buying phase.
In many B2B sales environments, trigger-based outreach often performs much better than static, list-based campaigns. This makes Lead411 especially valuable for lean sales teams that need to get the most results with limited resources.
Compared to ZoomInfo’s enterprise-focused plans, which usually have higher prices and long-term contracts, Lead411 offers a more affordable and flexible option. Its plans start at around $49 per month, and higher tiers often include unlimited searches or exports.
11. LeadIQ
Headquarters: San Francisco, California, USA
Database: ~100 million contacts
Competitive Edge: AI-assisted outreach tools
LeadIQ helps sales development representatives (SDRs), account executives (AEs), and revenue teams find, capture, and organize lead contact information quickly to accelerate pipeline creation and outbound sales workflows.
Its core strength lies in streamlining the top of the funnel by combining verified prospect data, workflow automation, and integrated CRM connectivity.
LeadIQ acts as a prospecting acceleration layer. Sales reps typically use this platform while browsing LinkedIn or company websites, instantly capturing prospects and enriching them with verified emails, role information, and company attributes. [4]
It also embeds AI-assisted features, such as an email writer (Scribe), to help craft outreach messages. Plus, it tracks job changes and key sales triggers, enabling reps to spot new opportunities when roles or responsibilities change.
Compared to ZoomInfo, which excels at large-scale contact discovery and account intelligence, LeadIQ competes by making prospecting faster, cleaner, and more operationally efficient.
10. UpLead
Headquarters: Covina, California, USA
Database: 180 million+ verified business contacts
Competitive Edge: High data accuracy, CRM & API integrations
UpLead strongly focuses on data accuracy, transparency, and cost efficiency. It provides access to a large database of professional contacts and company profiles, with real-time verification to ensure the data you export is actionable and up to date.
With over 180 million B2B contacts across 200+ countries, UpLead enables teams to build targeted lists using advanced filters like industry, location, company size, and technographics.
The platform guarantees over 95% accurate contact information and verifies emails in real time during export, helping users avoid costly email bouncebacks. Its Prospector tool is the heart of its offering, enabling users to narrow down prospects using 50+ search criteria and find decision-makers quickly.
Plus, UpLead integrates with popular CRM and marketing automation tools (like Salesforce and HubSpot) and offers technographic insights, enabling teams to personalize outreach based on technology stacks used by target companies.
9. Adapt.io
Headquarters: Coimbatore, Tamil Nadu, India
Database: 250 million+ business contacts, 12 million+ company profiles
Competitive Edge: Chrome extension & Real-time capture
Adapt.io is a B2B contact and account intelligence platform designed to help sales, marketing, and revenue teams discover and connect with qualified leads more effectively.
It’s a cost-efficient, scalable alternative to enterprise-heavy sales intelligence tools, with particular appeal to SMBs, mid-market companies, and internationally distributed sales teams.
At its core, the platform provides access to a large global database of business contacts and companies, covering emails, job roles, seniority levels, industries, company sizes, and geographic regions. It emphasizes breadth of coverage, allowing users to source prospects across North America, Europe, and especially APAC markets, where some US-centric data providers struggle with depth.
Adapt.io claims to have more than 500,000 users worldwide. Its database is frequently updated by tapping thousands of sources and processing millions of data changes daily to maintain freshness and accuracy. [5]
8. Dun & Bradstreet
Headquarters: Jacksonville, Florida, US
Database: 600 million+ business records
Competitive Edge: Enterprise-grade analytics & Risk solutions
Dun & Bradstreet (D&B) is one of the oldest business data companies in the world, with a history dating back over 180 years.
Unlike modern sales intelligence platforms that focus primarily on prospecting and outbound workflows, D&B was built to solve a broader and more structural problem: how businesses assess, trust, and transact with one another at scale. Its data underpins decisions across credit, risk, compliance, procurement, finance, and sales.
D&B’s core asset is its Business Data Cloud, one of the largest commercial datasets in the world. It brings together data on over 600 million businesses worldwide and connects information from many sources to provide customers with clear, actionable insights.
Another key part of D&B’s identity is its Data Universal Numbering System (D-U-N-S Number), a proprietary nine-digit identifier assigned to businesses worldwide. Governments, Fortune 500 companies, and financial institutions rely on this system to maintain consistent, auditable views of business relationships, something few modern sales tools attempt to provide. [6]
7. Seamless.ai
Launched in 2014Headquarters: Dublin, Ohio, US
Database: 1.3 billion+ contacts, 121 million+ company records
Competitive Edge: Real-time AI-powered data search
Seamless.ai functions as a real-time contact data search engine, combining AI with a powerful data engine to deliver verified email addresses, phone numbers, job titles, and company information in seconds.
Its central promise is real-time accuracy: it continuously researches and verifies contact and company data as you search.
The platform provides advanced prospect search filters such as job role, industry, location, and company size, along with buyer intent insights and job-change tracking. It has also expanded its buyer intent taxonomy to over 12,000 topics, helping sales teams spot interest signals and focus on high-value leads first. [7]
Compared to ZoomInfo, which emphasizes curated datasets, intent signals, and enterprise-grade analytics, Seamless.ai competes on real-time discovery, aggressive pricing, and ease of access. In practice, Seamless.ai is frequently used as a tactical alternative rather than a strategic data backbone.
6. Lusha
Headquarters: Boston, Massachusetts, US
Database: 280 million+ business profiles
Competitive Edge: User-friendly & Fast setup
Lusha makes everyday prospecting easier by allowing users to surface contact details instantly while browsing LinkedIn, company websites, or CRM records. This lightweight approach has made Lusha particularly popular among SDRs, recruiters, founders, and small-to-mid-sized sales teams.
The platform gives access to more than 280 million business contact profiles, including 187 million verified email addresses and 159 million verified phone numbers, helping sales teams reach decision-makers more effectively.
Lusha’s adoption has been driven largely by its product-led growth strategy. Users can start with a free tier, install the browser extension, and immediately experience value without complex onboarding or sales-led procurement.
This model has allowed Lusha to scale rapidly across tens of thousands of teams globally, especially in tech, staffing, and professional services industries, where outbound activity is frequent and time-sensitive. Today, the platform has more than 1.5 million users worldwide.
5. Clearbit by HubSpot
Launched in 2015Headquarters: San Francisco, California, US
Database: 389 million+ contacts, 50 million+ company records
Competitive Edge: API-first architecture & Real-time enrichment at scale
Clearbit is designed around an API-first approach, with a strong focus on real-time company (firmographic) and individual (demographic) data enrichment.
It aggregates data from 250 + public and private sources (including company websites, social profiles, legal filings, and other digital signals), turning billions of raw data points into actionable business attributes such as company size, industry codes, technologies used, revenue estimates, and key contacts.
Clearbit’s database includes over 50 million company records and 389 million person profiles, distilled into 100+ business attributes that power segmentation, scoring, and contextual insights across CRM and analytics workflows.
In 2023, Clearbit was acquired by HubSpot, expanding HubSpot’s ability to offer deep, real-time intelligence natively inside its CRM and marketing platforms. Following the acquisition, Clearbit was rebranded as the first AI-native data provider within HubSpot, offering real-time scoring, routing, and buyer intent signals directly within HubSpot’s CRM and marketing suites. [8][9]
4. RocketReach
Headquarters: Brooklyn, New York, US
Database: 700 million+ contacts, 60 million+ companies
Competitive Edge: Massive database, Browser extensions for seamless prospecting
RocketReach is known for its breadth of coverage, speed of lookup, and simplicity of use. It challenges ZoomInfo by offering a lighter, lower-cost alternative for contact discovery and enrichment, particularly for teams that do not require full GTM intelligence suites.
RocketReach deliberately focuses on one core problem: helping teams quickly find professional contact details for people and companies at scale. This focus has made it especially popular with recruiters, sales reps, consultants, and growth teams.
The platform maintains a vast global database of over 700 million professionals and 60 million companies, with coverage spanning industries, seniority levels, and geographic regions.
It aggregates data from public sources, proprietary matching algorithms, and continuous enrichment processes, enabling users to uncover business emails, phone numbers, social links, and company affiliations with minimal effort.
The company also provides browser extensions (for Chrome and Edge), allowing users to extract contact information directly from LinkedIn, LinkedIn Sales Navigator, company websites, and social profiles. This speeds up workflow and eliminates the need to switch back and forth between tools.
3. Apollo.io
Headquarters: San Francisco, California, US
Database: 210 million+ contacts, 35 million+ companies
Competitive Edge: Integrated sales engagement workflow, Transparent pricing
Apollo.io is a modern B2B sales intelligence and outbound engagement platform developed to unify sales tools into a single system. Unlike conventional data vendors that focus primarily on contact databases, Apollo is an end-to-end outbound engine that combines prospecting, enrichment, sequencing, analytics, and CRM synchronization.
A core strength of the platform is its comprehensive B2B database. It gives access to over 210 million contact and 35 million companies, along with 144 million direct dials and mobile numbers, allowing teams to filter prospects with over 200 criteria such as industry, location, job title, and company size.
The platform isn’t just about finding contacts: it also supports AI-powered automation and performance tracking. Its built-in AI Research Agent and workflow automation help sales teams reduce manual research and personalize outreach at scale. Early results show that teams using AI book more meetings and achieve higher outreach conversion rates. [10]
In 2025, Apollo was ranked #125 on Deloitte’s Fast 500 list, reporting a remarkable 954% growth over three years. Today, it is used by more than 500,000 companies worldwide, including major names like Autodesk and DocuSign. [11]
2. Cognism
Headquarters: London, UK
Database: 400 million+ contacts
Competitive Edge: Human-verified mobile numbers, Compliance-first architecture
Cognism is a B2B sales intelligence and data platform built for modern outbound sales, revenue operations, and demand generation teams. It strongly emphasizes data privacy, compliance, and high-quality contact accuracy.
At its core, Cognism provides decision-maker contact data, firmographics, technographics, and intent signals, with particular strength in mobile phone numbers and senior-level contacts.
Instead of aggregating raw records, the company invests heavily in verified and compliant datasets (including GDPR and CCPA compliance), making it particularly strong in markets like Europe, where privacy regulations are tightly enforced.
Its proprietary Diamond Data (phone-verified contact information) is often cited as a differentiator in terms of accuracy and connect rates. Plus, it integrates with common CRM and outreach systems (such as Salesforce, HubSpot, and sales engagement tools), enabling teams to enrich their existing data and keep systems up-to-date with minimal manual effort.
Cognism is used by more than 4,000 companies, including mid-sized and enterprise sales teams. The platform now uses AI-powered insights to help teams understand not only who their prospects are, but also why and when they may be ready to buy. It provides context such as business models, revenue drivers, and competitors, helping sales teams start more relevant and effective conversations.
1. LinkedIn Sales Navigator
Headquarters: Sunnyvale, California, US
Database: 1 billion members
Competitive Edge: First-Party Live Data
LinkedIn Sales Navigator is the flagship sales intelligence and prospecting product built on top of LinkedIn’s professional network, which itself has more than 1 billion members worldwide. [12]
Unlike traditional B2B databases that rely heavily on third-party aggregation, LinkedIn Sales Navigator draws from first-party, user-maintained profiles, giving it unparalleled visibility into real-time job changes, promotions, team expansions, company growth, and organizational shifts.
This foundation makes Sales Navigator less of a static data tool and more of a living, continuously updated market intelligence platform. Plus, it is deeply embedded within enterprise sales workflows through native CRM integrations, most notably with Salesforce and Microsoft Dynamics.
Independent analyses and ROI calculators show that customers using LinkedIn Sales Navigator achieve an average year-on-year revenue increase of about 8% (rising from 5% in the first year to 8% in the second and 10% by the third year).
Read More
Sources Cited and Additional References- Sales, Our global data coverage is better than ever, ZoomInfo
- Industry Report, Sales Intelligence market size & trend analysis, Modor Intelligence
- Understanding Intent: Where does Demandbase keyword Intent come from? Demandbase
- Prospecting Workflow, Capture and sync contact data in one click, LeadIQ
- Our Data, A database of 250 million+ contacts with 50+ data attributes, Adapt
- D‑U‑N‑S Number, A unique nine-digit identifier for businesses, D&B
- Buyer Intent, Find ready-to-buy prospects with buyer intent, Seamless.ai
- News Release, HubSpot acquires b2b intelligence leader Clearbit, HubSpot
- Matt Sornson, The all-new Clearbit is rebuilt with AI and is free to try, Clearbit
- Magazine, Apollo’s AI platform grows 500 percent in FY 2025, Apollo.io
- News, Apollo.io ranked #125 fastest-growing firm on Deloitte’s Fast 500, Apollo.io
- About Us, The world’s largest professional network with over 1 billion members, LinkedIn
