Your market, unlocked

Find business emails across 450M+ contact records

Instant access to decision-makers across any industry. Stop hunting for leads and start connecting with the right people in seconds.

Overloop B2B contact database screenshot

Pinpoint your ideal customer profile

Drill down through millions of records with granular precision. Whether you need CEOs in SaaS or HR Managers in Healthcare, our filters help you build the perfect list in clicks, not hours.

Smart Filters: No clunky spreadsheets. Just a clean, modern search engine built for sales teams.‍
Global Reach: Access contacts across Europe, North America, and APAC.
Clean Interface: No clunky spreadsheets. Just a clean, modern search engine built for sales teams.

Launch in just 5 minutes

Data quality ready for action

Data that drives revenue

A database is only as good as the conversations it starts

Verify my list

Verified emails

We check email addresses in real time and return verification signals so you can assess data quality before outreach.

Direct to campaign

The biggest difference? You don't need to export CSVs. Move contacts from "Search" to "Sequence" in one click.

Deep firmographics

Target companies based on precise employee count, revenue brackets, and industry verticals.

Enriched profiles

Get the full picture with LinkedIn URLs, accurate job titles, and seniority levels.

From stranger to opportunity in just three simple steps

Don’t just check the syntax.
Overloop performs multi-step validation to flag delivery risk before you send; no verifier can guarantee inbox placement.

Search

Input your criteria using our comprehensive filters to identify your Total Addressable Market.

Select & Verify

Choose the prospects that match your goals. Overloop automatically verifies their contact details on the fly.

Launch

Add them directly to a multichannel campaign. No tab-switching, no file uploads. Just seamless outreach.

Global coverage. Local precision.

Whether you are targeting local SMEs or Fortune 500 enterprises, our database scales with your ambition.

450M+ professional profiles

100+ searchable industries

Global geographic data

Start Automating

Built on expertise. Trusted by industry leaders

We poured a decade of outbound knowledge into a platform that fuels high-performing sales teams

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Access a 450M+ B2B contact database with built-in email verification.

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What is a B2B contact database?

A B2B contact database gives you verified business emails and direct details for the decision-makers you want to reach. Overloop's database covers 450M+ contacts across companies worldwide, filter by role, industry, size, and geography, verify on the spot, and push straight into a campaign. It's data built for outreach, not just a list to sit on.

How the B2B contact database works in Overloop

Search by your ICP
Filter 450M+ contacts by job title, seniority, industry, company size, and location to match your ideal customer profile.
Preview verified contacts
Review verification status and company context before adding a contact to a campaign, instead of working from a blind list.
Verify and enrich
Every address is checked in real time, and records are enriched with the firmographic detail you need to personalize.
Add straight to a sequence
Send qualified contacts into an email or multichannel campaign in one click, without exporting and re-importing.
Connect your CRM
Connect a supported CRM on an eligible plan and configure prospect-field mappings. Email, first name and last name map automatically; other fields can be matched manually. Sent Overloop emails can be logged through BCC. Prospect replies cannot sync from Overloop into HubSpot.

Why teams choose Overloop for B2B contact data

Coverage that matches your market

450M+ contacts worldwide means you can build a targeted list for almost any ICP, from local niches to global segments.

Verified, not scraped guesses

Verification signals help you prioritize addresses that appear usable and reduce wasted sends to inactive mailboxes.

Data and outreach in one place

Most tools sell you a list and leave. Overloop turns a search into a live campaign without leaving the platform.

A decade of outbound, built in

Overloop is built by the team behind Prospect.io and publishes privacy and data-processing documentation. GDPR compliance depends on the lawful basis, data source, campaign configuration, and use.

What to look for in a B2B contact database

Not all databases are equal, and the wrong one quietly wastes budget on bounces and compliance risk. Judge any provider on these:

Coverage that fits your market. A huge global count means nothing if it's thin in your niche. Overloop spans 450M+ contacts so you can go broad or narrow.
Verification, not raw scrapes. Unverified data can increase bounce risk and put your sender reputation at risk. Look for verification signals and transparent credit rules before choosing a provider.
Filters that match your ICP. Role, seniority, industry, size, and geography, the more precise the targeting, the higher your reply rate.
Compliance review. Unlawful use of data for prospecting creates legal risk. Overloop provides controls and publishes privacy and data-processing documentation; your compliance depends on the lawful basis, configuration, and use.

Ways teams use the B2B contact database

The database earns its keep the moment a search becomes a booked meeting. The most common plays we see:

Build a net-new pipeline. Filter by ICP, verify, and launch a campaign the same day, no waiting on a data vendor.
Enrich an existing list. Fill in missing emails and firmographics on contacts you already have so every record is actionable.
Find the right decision-maker. Search by role and seniority to reach the person who can actually say yes, not a gatekeeper.
Expand into a new market. Test a new industry or geography by pulling a targeted segment before you commit budget to it.

Who it's for

Founders who need a pipeline before they can afford a data vendor, SDR teams building targeted lists every week, and agencies sourcing prospects for multiple clients, anyone who wants accurate B2B data they can act on the same day.

Frequently asked questions

What is a B2B contact database used for?

A B2B contact database can help sales and marketing teams find decision-makers and contact records that may match an ideal customer profile. Teams should still validate role fit, source, and email status before outreach.

How many contacts does Overloop's database have?

Overloop advertises access to 450M+ B2B contact records worldwide. Coverage varies by market and filter, so test a representative sample for your target segment before relying on it.

Are the email addresses verified?

Overloop checks syntax, domain, SMTP, and related signals near the time of use. These checks estimate risk; they do not prove that a mailbox is valid or current, and they do not guarantee delivery.

Can I use the data directly in a campaign?

Yes. That's the difference, you can turn a search into a live email or multichannel sequence in one click, without exporting and re-importing lists.

How is this different from scraping?

Scraped and provider-supplied records can both become incomplete or outdated. Evaluate source, enrichment, update signals, and a representative sample before using any dataset.

Is the data GDPR-compliant?

GDPR compliance depends on the lawful basis, data source, transparency, objection handling, campaign configuration, and how your team uses the data. Published vendor documentation is one input, not a compliance guarantee. This is not legal advice.

Can I export the contacts?

Export options and CRM record flow depend on your plan, configured field mappings, and supported record types. Test the required direction with a representative sample before rollout.

How fresh is the data?

Relevant signals can be checked near the time of use, but roles, companies, and mailboxes change. Test a representative sample and re-check important records for your campaign.

Do I pay for contacts that turn out to be invalid?

Credit treatment and replacement rules depend on the applicable plan and product terms. Verification signals may reduce invalid-address and bounce risk, but they cannot prevent all bounces; confirm the rules and test a sample before scaling.

Can I target by company size and industry?

Yes. You can filter the database by company size, industry, job title, seniority, and geography, so the list you build matches your ideal customer profile instead of a generic dump.

Use selected contacts next in a measured LinkedIn automation workflow with platform limits and human review.