The B2B Data Sources
we actually use.

104+ databases, enrichment APIs, intent providers, LinkedIn tools and sending platforms across 12 categories — hand-picked from the stack we run for our clients. No affiliate fluff, just what works.

Free outbound tools
Source verified contact and company records at scale.

B2B Databases

Foundational prospecting databases. Use these when you need broad coverage of companies and people across industries, geos, and seniority levels.

Apollo

apollo.io

B2B account and contact data with enrichment and sequencing workflows.

Top pick

“Evaluate coverage in your own segment and compare seats, credits, export limits and verification costs.”

ZoomInfo

zoominfo.com

Enterprise-grade B2B intelligence with deep US coverage.

#2 pick

Cognism

cognism.com

GDPR-compliant phone-verified contacts, strongest in EMEA.

#3 pick

“First pick when you need mobile numbers for EMEA campaigns.”

LinkedIn Sales Navigator

business.linkedin.com

The source of truth for people data and account searches.

Lusha

lusha.com

Chrome extension for fast email + phone lookups on LinkedIn.

RocketReach

rocketreach.co

700M profiles with personal and work email coverage.

UpLead

uplead.com

Pay-as-you-go database with 95% email accuracy guarantee.

Ocean.io

ocean.io

Lookalike B2B search across 100M+ companies.

SalesIntel

salesintel.io

Human-verified contacts, on-demand research requests.

Seamless.AI

seamless.ai

Real-time search engine for verified B2B contacts.

Wiza

wiza.co

Export Sales Nav searches with verified emails in one click.

Kaspr

kaspr.io

Affordable LinkedIn extension for phones + emails (EU).

Adapt.io

adapt.io

Global B2B data with industry-vertical filters.

LeadIQ

leadiq.com

Capture contacts and push them straight into your sequence.

Append missing firmographic and people data on demand.

Data Enrichment APIs

Enrichment tools take a thin row (a name, a domain, a LinkedIn URL) and return a complete record – titles, technologies, headcount, funding, emails, mobiles.

Clay

clay.com

Spreadsheet-meets-orchestration for waterfall enrichment + AI.

Top pick

“The single most important tool in modern outbound. We build every campaign on Clay.”

FullEnrich

fullenrich.com

Waterfall enrichment across 15+ providers, one credit.

#2 pick

BetterContact

bettercontact.rocks

AI waterfall: only pay when a deliverable contact is found.

#3 pick

People Data Labs

peopledatalabs.com

API access to 3B+ people records – great for build-your-own.

Datagma

datagma.com

Cheap, fast, GDPR-friendly enrichment with mobile coverage.

Enrich Layer (formerly Proxycurl)

enrichlayer.com

LinkedIn data via API – profiles, companies, jobs.

Dropcontact

dropcontact.com

GDPR-native French enrichment, no database (always fresh).

Hunter

hunter.io

Domain search + email verification, generous free plan.

Apollo Enrich

apollo.io

Bulk enrich CSV uploads against the Apollo database.

Surfe

surfe.com

Sync LinkedIn data into HubSpot / Salesforce in one click.

PhantomBuster

phantombuster.com

200+ ready-made automations for extraction and enrichment.

Find work emails and mobile numbers for any prospect.

Email & Phone Finders

Contact discovery tools. We run waterfalls across 3–5 of these to push deliverable contact rates above 80%.

Prospeo

prospeo.io

High-accuracy email finder, especially for LinkedIn URLs.

Top pick

FindyMail

findymail.com

Verified-only emails, refunds for catch-alls.

#2 pick

Hunter Email Finder

hunter.io

The OG domain + name → email lookup tool.

#3 pick

Anymail Finder

anymailfinder.com

Only charges for verified addresses.

Snov.io

snov.io

Finder + verifier + drip campaigns in one suite.

ContactOut

contactout.com

Strong on personal emails and mobile direct dials.

SalesQL

salesql.com

LinkedIn extension finding personal + work contact info.

Nymeria

nymeria.io

Bulk people search with API access.

Voila Norbert

voilanorbert.com

Reliable email finder with verification add-on.

Validate addresses before you send to protect deliverability.

Email Verification

Every list should be verified twice – once at enrichment, once right before send. Sending to invalid mailboxes is the fastest way to burn a sending domain.

MillionVerifier

millionverifier.com

Cheapest pricing tier we trust, 99%+ accuracy.

Top pick

“Our default verifier – $0.0004/email and rock-solid results.”

NeverBounce

neverbounce.com

Industry standard with real-time API verification.

#2 pick

ZeroBounce

zerobounce.net

Verification + activity scoring + abuse detection.

#3 pick

BounceBan

bounceban.com

Catch-all verifier – validates risky addresses safely.

Kickbox

kickbox.com

Trusted by enterprise senders, strong API.

Emailable

emailable.com

Fast bulk verification with a clean dashboard.

MailerCheck

mailercheck.com

From the MailerLite team – simple, fair pricing.

Reoon

reoon.com

Strong catch-all handling, popular with cold senders.

Detect buying intent, funding, hiring, and tech-stack moves.

Intent Signals & Triggers

Trigger-based outreach beats spray-and-pray every time. These tools surface the why-now moments – fundraises, new hires, tech adoption, content engagement.

Common Room

commonroom.io

Unify product, community and intent signals into one view.

Top pick

Koala

getkoala.com

Website de-anonymisation + product intent scoring.

#2 pick

Warmly

warmly.ai

Real-time visitor reveal with auto-orchestrated plays.

#3 pick

RB2B

rb2b.com

Person-level (not just company) US visitor identification.

PredictLeads

predictleads.com

API for hiring, funding, product and tech-stack events.

TheirStack

theirstack.com

Find companies hiring for specific tools or skills.

LoneScale

lonescale.com

Hiring + job-change signals piped directly into CRM/sequences.

Trigify

trigify.io

LinkedIn-native engagement and content signals.

Mantiks

mantiks.io

Job-posting intelligence to spot growth + tech bets.

Ocean.io Signals

ocean.io

Funding, hiring and headcount triggers for any account list.

6sense

6sense.com

Predictive intent + ABM orchestration for enterprise.

Bombora

bombora.com

Topic-level B2B intent data co-op across 5,000+ sites.

Get alerted when champions, users, or buyers switch jobs.

Job-Change Tracking

Past customers and product champions who change jobs are the highest-converting cold leads on the planet. Track them automatically.

UserGems

usergems.com

Track champions + buyers as they switch jobs.

Top pick

Champify

champify.io

CRM-synced job-change alerts and play automation.

#2 pick

Warmly Job Changes

warmly.ai

Job-change reveal bundled with intent orchestration.

#3 pick

jobdata

jobdata.app

Global jobs API – build your own job-change pipelines.

Boomerang

boomerangrev.com

Turn happy customers into outbound pipeline.

Search, scrape and automate outreach on LinkedIn safely.

LinkedIn Prospecting

LinkedIn-native tooling for search, list-building, scraping Sales Navigator, and running compliant connection + message sequences.

HeyReach

heyreach.io

Multi-account LinkedIn outreach built for agencies + teams.

Top pick

“Our chosen LinkedIn sender – unlimited senders, unified inbox, proxy-safe.”

Evaboot

evaboot.com

Clean Sales Navigator exports with emails.

#2 pick

LinkedIn Sales Navigator

business.linkedin.com

The platform – advanced search, alerts, Smart Links.

#3 pick

Dripify

dripify.io

Cloud-based LinkedIn drip campaigns with safety limits.

LeadDelta

leaddelta.com

CRM for your LinkedIn connections + DMs.

Scrupp

scrupp.com

Sales Nav scraper + email enricher in one.

Expandi

expandi.io

Smart-sequence LinkedIn automation with webhooks.

Meet Alfred

meetalfred.com

Multi-channel sequences across LinkedIn, email, Twitter.

PhantomBuster LinkedIn

phantombuster.com

Battle-tested LinkedIn phantoms for any scraping job.

Closely

closelyhq.com

Affordable LinkedIn automation with built-in CRM.

Score, prioritise and orchestrate plays at the account level.

Account-Based Selling

ABM/ABS platforms unify intent, fit and engagement so reps focus on the 50–500 accounts most likely to buy this quarter.

6sense

6sense.com

Predictive ABM platform – intent, fit, engagement.

Top pick

Demandbase

demandbase.com

Account intelligence + advertising + orchestration.

#2 pick

RollWorks

rollworks.com

ABM for mid-market with strong HubSpot integration.

#3 pick

Keyplay

keyplay.io

ICP scoring and lookalike account discovery.

Pocus

pocus.com

Revenue data platform for PLG + outbound motions.

MadKudu

madkudu.com

Lead + account scoring for PLG sales teams.

Forager

forager.ai

Always-on prospect list builder using fresh signals.

Pull structured data from any public website at scale.

Web Scraping & Web Data

Build custom data sources – competitor pricing, directory listings, marketplaces, review sites – when off-the-shelf databases don't cover your niche.

Apify

apify.com

Marketplace of 2,000+ scrapers + custom actor platform.

Top pick

“Our go-to for any custom data source – LinkedIn, Maps, marketplaces, reviews.”

Bright Data

brightdata.com

Enterprise proxy + scraping infrastructure at any scale.

#2 pick

ScrapingBee

scrapingbee.com

Headless-browser scraping API, handles JS + captchas.

#3 pick

Octoparse

octoparse.com

No-code visual scraper for non-technical users.

Scrap.io

scrap.io

Google Maps lead generator with real-time scraping.

Browse AI

browse.ai

Train a bot in 2 minutes to monitor any web page.

Chat4Data

chat4data.ai

Conversational web scraper – describe what you need.

Mirror your best customers and find net-new fit accounts.

Lookalikes & ICP Discovery

Feed your closed-won list in, get a ranked list of look-alike accounts out. The fastest way to expand a working ICP.

Keyplay

keyplay.io

Score and rank accounts against your live ICP.

Top pick

Ocean.io

ocean.io

Upload customers, get 10x lookalike account lists.

#2 pick

Apollo Lookalike

apollo.io

Lookalike search using Apollo's 70M company graph.

#3 pick

Crunchbase Pro

crunchbase.com

Funding, growth and innovation signals for ICP discovery.

Dealroom

dealroom.co

Global startup + tech ecosystem intelligence.

Sourcescrub

sourcescrub.com

PE/M&A-grade private company intelligence.

Send, warm and inbox cold campaigns at scale.

Cold Email Sending Infra

Sending platforms with deliverability tooling – inbox rotation, warmup, spintax, reply detection – built specifically for cold outbound (not transactional/marketing).

Instantly

instantly.ai

Unlimited mailboxes, smart warmup, AI inbox detection.

Top pick

“Our default sending stack – best inbox placement in 2024–25.”

Smartlead

smartlead.ai

Unlimited inboxes, master inbox, white-label friendly.

#2 pick

Salesforge

salesforge.ai

AI-personalised cold emails at scale with infra included.

#3 pick

Lemlist

lemlist.com

Multi-channel sequences with personalised images + video.

Reply.io

reply.io

Multi-channel sales engagement with built-in AI SDR.

Mailshake

mailshake.com

Simple cold email for solo founders and small teams.

Quickmail

quickmail.com

Deliverability-obsessed sender, agency-friendly.

Mailforge

mailforge.ai

Cheap, scalable cold-email infrastructure (Google + MS).

Where the meetings land and revenue gets attributed.

CRMs & Outbound Sync

Modern revenue CRMs and the connectors that keep prospecting data, sequences and pipeline in sync.

HubSpot

hubspot.com

Most-loved CRM for SMB/mid-market revenue teams.

Top pick

Salesforce

salesforce.com

Enterprise standard – endless customisation.

#2 pick

Attio

attio.com

Modern, data-first CRM built for outbound teams.

#3 pick

“Our internal CRM – pairs beautifully with Clay + HeyReach.”

Pipedrive

pipedrive.com

Sales-rep-first pipeline CRM, easy to adopt.

Close

close.com

Built-in calling + email for high-velocity inside sales.

Folk

folk.app

Lightweight relationship CRM with LinkedIn sync.

Default

default.com

Inbound + outbound routing and CRM enrichment.

Don't want to build the stack yourself?

We've assembled, tested and operated every tool on this page. Skip the trial-and-error — we'll run a full outbound engine for you using the right combination from day one.

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