Discover our GTM Flywheel: Content, Ads & Outbound working as oneLearn more
ColdIQ Logo
Agency
Tools
Education
Get In Touch

All there is to know about the latest prospecting techniques

Growth

AgencyAccelerator ProgramInboxes
Grow your revenue

Resources

Tech StackVideo ContentCase StudiesBlogWe're HiringFor Investors

GTM Tools

FREE GTM ToolsColdIQ Exclusive DealsAI Sales ToolsLinkedIn ToolsSales ToolsData SourcesAI Marketing ToolsAI AgentsContact us
Elite Studio - Partner Badge - 2025 - ColdIQ

Free Tools

Email FinderMobile FinderEmail Spam CheckerFind Similar Companies

Get In Touch

[email protected]
@MichLieben
Michel Lieben
@MichLieben
Elite Studio - Partner Badge - 2025 - ColdIQ
Copyright 2026 © ColdIQ LLC.
PrivacyTerms
All rights reserved.
  1. Home
  2. DATA SOURCES
  3. B2B Contact APIs

Best B2B Contact APIs Tools

In today’s fast-paced world, finding the best B2B contact API tools can transform your sales and marketing efforts. If you’re part of a GTM team, marketer, or sales pro, you’re in the right place. You’ll get a clear comparison, helpful selection tips, and real use cases for top tools.

What is B2B Contact API software?

B2B contact API software provides a way for businesses to get accurate contact information from company databases through an automated system. Teams use it when they need fresh leads fast or want to verify and enrich contact data without manual work.

For example, a sales rep might use this software to pull phone numbers and email addresses for their outreach list. Or marketing might enrich their customer database to personalize campaigns better. It helps teams connect with the right people quickly.

Why do teams use B2B Contact API tools?

Teams use these tools to solve common problems like outdated data, slow lead generation, and manual errors. They save time and boost efficiency so your team can focus on closing deals and hitting revenue targets.

Here’s what these tools help with:

  • Finding verified contact details quickly
  • Enriching existing contact records
  • Improving lead quality
  • Automating data updates
  • Scaling outreach efforts
  • Reducing costly manual errors

Sales, marketing, and operations teams rely on these tools to drive measurable results and scale faster. The bottom line: better data leads to smarter, faster revenue growth.

What are the best B2B Contact API tools?

Here’s a quick look at popular B2B contact API software. You’ll see categories for lead generation, enrichment, and outreach automation.

ToolPrimary UseKey Feature
ApolloLead generationExtensive contact database
ZoomInfoLead data enrichmentHigh data accuracy
WizaLinkedIn data scrapingEasy export to CRM
FullEnrichData enrichmentPowerful API integration
LemlistOutreach automationPersonalized email campaigns

This list is a curated selection to help you find the right fit based on your team's needs and budget. There are tools built for simple lookups to full-scale sales automation.

How do you choose the best B2B Contact API software for your team?

Start by considering your team size and budget. Smaller teams might prefer simpler, cost-effective tools, while larger teams will want scalable solutions with robust features.

Next, check how well the software integrates with your CRM or marketing platforms. Compatibility means less manual work and smoother workflows. Also, think about ease of use; a friendly interface reduces training time.

Finally, consider future growth. Choose a tool that can scale as your team and data needs grow. Balancing these factors gets you a tool that’s practical and ready for the long haul.

What features should you look for in B2B Contact API software?

Look for features that make your work easier and more effective. Here are must-haves:

  • Real-time contact verification to ensure data accuracy
  • Bulk data enrichment to save time
  • Strong API support for automation
  • Easy integration with CRMs and marketing tools
  • Fast, responsive customer support
  • Advanced feature: AI-powered data cleansing that improves contact quality over time

These features help reduce errors, speed up processes, and keep your contact lists fresh.

What are common use cases for these tools?

Teams use B2B contact APIs in lots of smart ways. Here are a few examples:

  • Sales reps pulling verified emails to increase cold outreach success
  • Marketers enriching prospect data for targeted email campaigns
  • Customer success teams enhancing CRM data to personalize support
  • Operations teams automating regular data updates to maintain clean records

These use cases show how these tools benefit across teams, improving collaboration and results.

What benefits can you expect from using B2B Contact API tools?

Using these tools means faster lead generation and more accurate contacts. You’ll cut down the time spent chasing bad info and focus more on closing deals. Teams see improvements like:

  • 30-50% less time spent on manual data entry
  • Improved email deliverability rates by up to 20%
  • Higher conversion from prospect lists
  • Smooth data syncs across platforms
  • More revenue with less effort

These gains add up fast, making your team more productive and effective.

What should you know before getting started?

Getting started isn’t always plug-and-play. Common challenges include initial setup time, data costs, and team adoption rates. To avoid these pitfalls, choose a solution with good onboarding support, test data quality upfront, and involve your team early in decisions.

It also helps to set realistic goals and track progress. With these tips, you’re ready to take the next step toward smarter data and better sales with B2B contact API tools.

See also:

AI Account Research
AI Advertising
AI Agents
AI All-in-One Prospecting
AI Automation
AI BDR
AI Buyer Signals
AI Cold Caller
AI Competitive Intelligence
AI Competitor Analysis
Apollo

Apollo

Data-First Sales Platform

View

Pricing

Starting at $49

Key Features

Find and research leads
Personalize messaging fast
Launch campaigns quickly
Apollo

Apollo

View

Apollo helps sales leaders, founders, account executives, marketers, sales development, and revenue operations to improve their sales processes and grow their businesses so they can meet their revenue goals. It delivers this value through AI-powered tools for finding leads, automating engagement, managing deals, analyzing performance, streamlining workflows, and providing coaching, all within a single integrated platform.

Best For

Startups
SMBs
Mid-market
BetterContact

BetterContact

AI Waterfall Enrichment

View

Pricing

Starting at $15

Key Features

Access multiple data providers
AI-driven data source sequencing
Four-layer contact verification
BetterContact

BetterContact

View

Home helps outbound leaders find and verify mobile phone numbers and email addresses using a combination of data sources. It delivers value by intelligently selecting the most relevant data providers for each lead and offering real-time verification to protect domain reputation and increase deliverability.

Best For

Startups
Scale-ups
SMBs
Bizzy

Bizzy

Search by person company name or VAT number

View

Pricing

Pricing not listed; talk to sales.

Key Features

Automatically finds and qualifies leads
Tracks market signals and buying intent
Provides verified contact data
Bizzy

Bizzy

View

Bizzy helps sales teams, marketing teams, staffing teams, and investment teams find and understand companies. It integrates official data with real-time web, news, and social insights, offering an AI-powered B2B database with filters and smart workflows for effective customer targeting.

Best For

Startups
Scale-ups
SMBs
Featured
Clay

Clay

Prospect Differently

View

Pricing

Starting at $149

Key Features

Recurring workflows
CRM enrichment and hygiene
Targeted lead list building
Clay

Clay

View

Clay helps Go-To-Market teams access unique data from 100+ sources and AI agents, enabling them to automate growth workflows. It delivers value by enriching customer data, tracking intent signals, formatting data with AI, and constantly updating tools like CRM and email sequencers.

Best For

Startups
SMBs
Enterprise
Clodura

Clodura

AI Powered Lead Generation Platform

View

Pricing

Starting at $90

Key Features

All-in-one GTM platform
Real-time email verification
AI-powered outreach
Clodura

Clodura

View

Clodura.AI offers sales professionals a GenAI-powered platform to enhance prospecting and closing deals. It provides a comprehensive B2B database, sales engagement tools, email verification, buyer intent identification, and data enrichment, leading to more efficient outreach and higher conversion rates.

Best For

SMBs
Mid-market
Enterprise
Cognism

Cognism

Premium Sales Intelligence

View

Pricing

Pricing not listed; talk to sales.

Key Features

Up-to-date quality data
Mobile phones and emails
Phone-verified contact data
Cognism

Cognism

View

Cognism helps sales, marketing, GTM ops, and recruitment professionals connect with B2B prospects by providing validated contact data. It achieves this by offering phone-verified mobile numbers, unrestricted data access, and intent data, while also ensuring GDPR compliance and easy integration with various CRM and sales engagement tools.

Best For

SMBs
Mid-market
Enterprise
Datagma

Datagma

Find email and enrich your B2B data

View

Pricing

Starting at $39

Key Features

Find verified emails and phones
Real-time data retrieval
CRM integration and enrichment
Datagma

Datagma

View

Datagma helps businesses, including Fortune 500 companies, scale-ups, and startups, find verified email addresses and phone numbers to generate leads. It achieves this by offering a Chrome extension, API, and file upload options, integrating with tools and CRMs, and providing real-time data enrichment with GDPR compliance.

Best For

Startups
Scale-ups
Enterprise
Dropcontact

Dropcontact

Correcting enriching CRM & B2Bcontact files

View

Pricing

Starting at $29

Key Features

Enrich with confirmed email addresses
Add civilities and LinkedIn profiles
Clean and merge duplicates automatically
Dropcontact

Dropcontact

View

Dropcontact helps sales and marketing teams enrich B2B contact data to improve lead generation and CRM data quality. It finds and verifies email addresses and company information using proprietary algorithms, integrating with CRMs or working with file uploads, while ensuring GDPR compliance.

Best For

Startups
SMBs
Mid-market
FullEnrich

FullEnrich

B2B Contact Enrichment

View

Pricing

Starting at $26

Key Features

Find emails and phone numbers
Waterfall enrichment with high find rate
Integrate with over thousand apps
FullEnrich

FullEnrich

View

FullEnrich helps B2B sales and marketing teams find more emails and phone numbers for their prospects, aiming to increase pipeline and customer reach. It aggregates contact information from over 15 vendors, verifies email deliverability, and integrates with tools like LinkedIn, Sales Navigator, Zapier, and CRMs.

Best For

SMBs
Mid-market
Enterprise
Kaspr

Kaspr

Find B2B Contact Data With Our LinkedIn Extension

View

Pricing

Starting at $45

Key Features

Accurate contact data
LinkedIn Chrome extension
All-in-one prospecting dashboard
Kaspr

Kaspr

View

Kaspr helps sales teams, recruiters, and founders find B2B contact information directly on LinkedIn. This is achieved by providing a Chrome extension that reveals accurate and compliant emails and phone numbers, and an all-in-one prospecting solution with lead management and integrations.

Best For

Startups
Scale-ups
SMBs
LeadMagic

LeadMagic

Lead Generation: Most Accurate & Lowest Cost Email Validation

View

Pricing

Starting at $99.99

Key Features

Email finder with high accuracy
Mobile finder with best accuracy
Real-time data enrichment
LeadMagic

LeadMagic

View

LeadMagic helps B2B companies by enriching their prospecting data with accurate emails, mobile numbers, and company information. It leverages AI technology to match data with real-time information and integrates seamlessly with various platforms to clean, validate, and push enriched data to outbound systems for improved lead engagement.

Best For

Startups
SMBs
Mid-market
Lemlist

Lemlist

AI-powered Sales Engagement Platform for Converting Ideal Buyers

View

Pricing

Starting at $55

Key Features

Find qualified leads fast
Enrich contact info automatically
Personalize outreach at scale
Lemlist

Lemlist

View

lemlist helps salespeople and marketers reach more customers by building lead lists, personalizing outreach, and improving email deliverability. It automates email personalization at scale and warms up email domains to avoid spam filters, supporting successful cold outreach campaigns across multiple communication channels.

Best For

Startups
SMBs
Agencies
Lima Data

Lima Data

B2B data APIs and infrastructure

View

Pricing

Starting at $50

Key Features

Find verified emails instantly
Deliver mobile numbers accurately
Real-time contact data updates
Lima Data

Lima Data

View

Lima Data offers B2B data APIs for building prospecting, research, and email agents with verified contact data. It enables smarter outreach through real-time signals, enrichment, and flexible credits.

Best For

Startups
SMBs
Enterprise
Lusha

Lusha

B2B Lead Enrichment in a Click

View

Pricing

Starting at $22.45

Key Features

Chat to build pipeline faster
Verified data and live leads
Real-time leads and faster closes
Lusha

Lusha

View

Lusha helps sales, marketing, and recruiting professionals find contact information for prospects and key decision-makers. It leverages an AI-powered database of business profiles, complete with intent data and enrichment capabilities, to streamline outreach and improve conversion rates.

Best For

Startups
SMBs
Mid-market
Ocean.io

Ocean.io

B2B Lookalike Search for Prospecting Data

View

Pricing

Starting at $79

Key Features

Company lookalike search
People lookalikes search
APIs to transfer data
Ocean.io

Ocean.io

View

Ocean.io helps B2B teams find ideal prospects by identifying lookalike companies based on a provided URL. This drives efficient go-to-market strategies and improves conversion rates by focusing on companies most likely to need a given solution.

Best For

SMBs
Mid-market
Enterprise
People Data Labs

People Data Labs

The Single Source of Truth for People Data

View

Pricing

Starting at $98

Key Features

Build workforce data easily
Access fresh resume and contact data
License data feeds via cloud
People Data Labs

People Data Labs

View

People Data Labs helps HR tech, sales and marketing, investment intelligence, and fraud and identity companies by providing person and company data. It delivers this value via data collection and APIs, giving access to datasets that can be integrated into existing systems.

Best For

SMBs
Mid-market
Enterprise
Prospeo

Prospeo

Find business email addresses for outreach

View

Pricing

Starting at $39

Key Features

Find verified email addresses
search emails by domain
discover high-quality B2B mobile numbers
Prospeo

Prospeo

View

Prospeo helps sales professionals, recruiters, and marketers find verified email addresses and mobile numbers for outreach. It delivers this value by offering tools like an email finder, domain search, Sales Navigator export, mobile finder, email verifier, and a Chrome extension to locate contact information from various sources including LinkedIn and websites.

Best For

Startups
SMBs
Mid-market
QuickEnrich

QuickEnrich

Comprehensive B2B email and mobile finder

View

Pricing

Starting at $24

Key Features

Comprehensive B2B email finder
Includes mobile phone numbers
Extensive contact database
QuickEnrich

QuickEnrich

View

QuickEnrich is a B2B email finder tool and API with 130M+ contacts, including mobile numbers, enabling better coverage and more deals closed. Start for free to target your entire ICP and grow your business.

Best For

Startups
Scale-ups
SMBs
ReachStream

ReachStream

B2B data platform with verified contacts

View

Pricing

Starting at $29

Key Features

B2B verified contacts instantly
Advanced reachAPI integration
Built-in email verifier
ReachStream

ReachStream

View

ReachStream is a B2B data platform offering verified contacts, email verification, and dynamic list building to boost sales and marketing success.

Best For

Startups
SMBs
Mid-market
Rocketreach

Rocketreach

Find email phone & social media links for anyone

View

Pricing

Starting at $27

Key Features

Verified contact data
Highest data accuracy
AI-powered outreach recommendations
Rocketreach

Rocketreach

View

RocketReach helps sales professionals, recruiters, and business development teams find accurate contact information for potential leads and prospects. It aggregates and verifies email addresses and phone numbers from a vast database, integrating with various platforms and employing AI to enhance lead discovery and engagement automation.

Best For

Startups
Scale-ups
Mid-market
Enterprise
SalesIntel

SalesIntel

Best B2B Contact Data Provider& Sales Intelligence Platform

View

Pricing

Pricing not listed; talk to sales.

Key Features

Human-verified B2B data
Highest accuracy accounts and contacts
Actionable buyer intent data
SalesIntel

SalesIntel

View

SalesIntel helps sales, marketing, and RevOps teams by providing reliable B2B contact data and sales intelligence to build and maintain their pipeline. It accomplishes this by helping them find ideal customers, narrow their focus, and access verified contact information, along with dedicated support to effectively harness the gathered data.

Best For

SMBs
Mid-market
Enterprise
Seamless

Seamless

Sales Software | Best Sales Leads & Tools

View

Pricing

Pricing not listed; talk to sales.

Key Features

Find B2B contact information
Deliver targeted sales messages
Automate list-building efforts
Seamless

Seamless

View

Seamless.AI helps sales and marketing professionals by providing contact information and insights. It delivers this value by leveraging a vast database and search capabilities to identify and deliver relevant professional data.

Best For

Startups
SMBs
Mid-market
Swordfish

Swordfish

Find Cell Phone Numbers and Email Addresses

View

Pricing

Starting at $99

Key Features

Unlimited mobiles & emails
Find contact info anywhere
Bulk prospect search filters
Swordfish

Swordfish

View

Swordfish helps recruiters, sales professionals, and real estate agents find cell phone numbers and email addresses for prospects. It achieves this by providing a Chrome extension, prospect search tools, file enrichment, reverse lookup, and an API with accurate contact information and real-time validation.

Best For

Startups
SMBs
Mid-market
Tami AI

Tami AI

Real-time B2B leads and intelligence

View

Pricing

Starting at $47

Key Features

Accurate contact data refresh
Real-time CRM contact alerts
AI-powered market reports
Tami AI

Tami AI

View

TAMI AI delivers real-time verified B2B leads, contact data, and market insights to boost sales and marketing efficiency.

Best For

SMBs
Mid-market
Enterprise
Upcell

Upcell

Fastest Prospecting in Existence

View

Pricing

Pricing not listed; talk to sales.

Key Features

Simplifies prospecting with extension
Decouples prospecting and contact data
Fast deployment worldwide
Upcell

Upcell

View

upcell helps salespeople find accurate contact information for prospects, directly within their Chrome browser. It delivers this value through a lightweight extension that provides access to premium data on a pay-as-you-go basis, pushing data directly into Google Sheets or Microsoft 365.

Best For

Scale-ups
SMBs
Mid-market
Uplead

Uplead

B2B Database & BusinessContact Data Provider

View

Pricing

Starting at $99

Key Features

Real-time verified B2B contacts
Instant email verification
Bulk data lookup
Uplead

Uplead

View

UpLead helps sales teams and companies find accurate B2B contact data and intent data for prospecting. It achieves this by offering a database of verified leads with advanced search filters, real-time email verification, and data enrichment features.

Best For

Startups
SMBs
Mid-market
Wiza

Wiza

Email Finder for LinkedIn - B2B Database

View

Pricing

Starting at $83

Key Features

Find verified emails fast
Get accurate contact data
Export up-to-date info easily
Wiza

Wiza

View

Wiza helps sales teams, recruiters, and marketers find accurate B2B contact information. It actively checks live data sources when requested, unveiling validated prospect data such as email addresses and phone numbers, and integrates with CRMs for seamless data flow.

Best For

SMBs
Mid-market
Enterprise
ZoomInfo

ZoomInfo

B2B Database | Company Contacts & Intelligence

View

Pricing

Pricing not listed; talk to sales.

Key Features

High-quality B2B data
AI-driven sales intelligence
Automated lead routing workflows
ZoomInfo

ZoomInfo

View

Access to this page has been denied prevents bots from accessing a specific webpage. It achieves this by requiring users to confirm they are human, thus blocking automated access.

Best For

Startups
SMBs
Mid-market
Enterprise

Frequently Asked Questions

What are B2B Contact APIs?

B2B contact APIs provide access to business contacts and company data to enhance lead generation and sales processes.

What can B2B Contact APIs do?

They help fetch accurate business emails, phone numbers, and company details for targeted outreach and CRM updates.

How do B2B Contact APIs work?

They connect your software with databases to retrieve business contact info in real-time via simple web requests.

Are B2B Contact APIs easy to set up?

Yes, most B2B contact APIs offer quick integration with clear documentation and ready-to-use code examples.

Are B2B Contact APIs free?

Some offer free tiers with limited requests, but full access typically requires a paid subscription.

What is the common B2B Contact APIs pricing?

Pricing usually starts around $30-$50 per month, based on the number of requests or contacts accessed.

What are the types of B2B Contact APIs?

Common types include email verification, phone number lookup, company data, and lead enrichment APIs.

Do B2B Contact APIs work with email?

Yes, they can validate emails, find business emails, and enrich email contact details for outreach.

What are the best B2B Contact APIs tools?

Popular tools include Clearbit, Hunter.io, ZoomInfo, and Apollo for reliable business contact data.

What are common B2B Contact APIs integrations?

They often integrate with CRMs, marketing platforms, sales tools, and customer support software via API connections.