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Feature — Lists & BYOD

Bring Your Own Data: Import B2B Contacts and Reach Them Through Happierleads

You've already paid for data elsewhere. Upload your contacts via CSV or REST API and run them through the full Happierleads stack — the same Email Waterfall, Follow-up Engine, and Inbox Engine that powers your B2B website visitor identification. Your data, our infrastructure.

Importing your own data is free. You only pay for the infrastructure you use.

Free
To import your own contacts
CSV + API
Two ways to bring your data in
100k+
Rows per CSV upload
All tools
Work with your imported contacts
Why teams use BYOD

More coverage. More control. Zero lock-in.

Not every company wants to rely on a single data vendor. If you buy from ZoomInfo, Apollo, or anyone else — or run your own prospecting — don't let those contacts sit in a spreadsheet.

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CSV upload in seconds

Drop any CSV with an email column and we auto-map the fields. No schemas, no formatting work — just drag, drop, and go.

api

REST API for automations

Push contacts from your CRM, data warehouse, or enrichment pipeline. Supports single records and batches of up to 10,000 per call.

merge

Mix with identified visitors

Layer your imported lists on top of Happierleads-identified site visitors. One unified dashboard — no juggling between tools or tabs.

01 — Import

Upload once. Available everywhere instantly.

Whether the list came from ZoomInfo, a trade show badge scan, or your own research — drop it in as a CSV or push it via API and it's immediately available inside every Happierleads tool.

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    Drag-and-drop CSV. Auto-detect for first name, last name, email, company, job title, and any custom columns you include.
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    REST API. POST contacts from any system — CRM, data warehouse, enrichment pipeline. No ETL middleware required.
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    De-duplication built in. We match against existing contacts automatically — no messy overlap with your identified visitors.
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    Instant enrichment. Every imported contact is run through the Email Waterfall to validate addresses and fill any gaps before outreach starts.
upload_file
Import contacts
CSV or REST API
Field mapping
first_name First Name
email Email
company_name Company
job_title Job Title
linkedin_url LinkedIn
check_circle 12,847 contacts ready De-duped & enriched
02 — Engage

Your data. Our infrastructure. All of it.

Once your list is in, it works exactly like a visitor-identified lead. Verify addresses, enrol in sequences, send from warmed mailboxes — same features, same quality, your data.

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    Email Waterfall. Verify every imported address through 8+ providers before sending — so stale data from any vendor never damages your sender reputation.
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    Follow-up Engine. Enrol imported lists in AI-personalised multi-step sequences — same spin tags, same conditional branching as your identified visitors.
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    Inbox Engine. Send from managed mailboxes with Heat Score™ monitoring. Your list, our deliverability infrastructure.
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    ICP scoring. Upload company data alongside contacts and we score the list against your ICP — highest-fit records rise to the top automatically.
Your imported list flows through
alt_route
Email Waterfall
Verify & find missing emails
✓ 94% valid
schedule_send
Follow-up Engine
AI-personalised sequences
3-step seq
all_inbox
Inbox Engine
Send from warmed mailboxes
Heat 91

Start with your own list today

Sign up, go to Lists, and drop your CSV. Your contacts will be verified and ready to sequence in minutes.

Who uses this

Built for teams with existing data

analytics

Multi-provider shops

You buy from ZoomInfo, Apollo, and Lusha. Don't run each through separate tools — consolidate all of it into one sending infrastructure.

event

Event & conference leads

Scanned 600 badges at a trade show. Upload the CSV on Monday and have personalised follow-ups running by Tuesday.

code

RevOps & API teams

Build enrichment pipelines that push ICP-qualified contacts directly into Happierleads via REST API — no manual exports, no spreadsheet chaos.

Common questions

FAQ

Is importing my own data free?

Yes — importing contacts via CSV or API is free. You only pay when you use the sending infrastructure (Inbox Engine, Email Waterfall). If you're on a plan, your imported lists use the same allowances as your identified visitors.

What format does the CSV need to be in?

Any CSV with at least an email column. We auto-detect common column names (first_name, last_name, company, title, phone) and let you manually map anything non-standard during the import flow.

What does the REST API support?

POST single contacts or batches of up to 10,000 per call. Supports upsert so re-sending the same contact just updates the existing record. Full API docs are available inside your dashboard once you're signed in.

Can I mix my imported contacts with Happierleads-identified visitors?

Absolutely. All contacts — identified, imported, or API-pushed — live in the same dashboard, share the same ICP scoring, and flow through the same sequences. There's no forced separation.

Are there limits on how many contacts I can import?

Individual CSV uploads support up to 100,000 rows. There's no cap on total contacts stored. API imports are rate-limited by plan — contact us if you need higher throughput.

See why people like you choose Happierleads

Customer profile images
Star rating
4.8
from hundreds of reviews on G2
Start free 14-day trial
G2 Logo Star rating

Great tool for capturing web visitors

"It allows us to identify visitors and rate them for quality, then it allows us to capture their contact detail and setup email automations."

Profile Pircture
Andrew J.
Fractional Fractional Chief AI Officer (CAIO)
G2 Logo Star rating

Learn who's browsing your website!

"I can automate my marketing and reaching efforts with ease. You set it up one and the platform does it all for you with minimum input from you. "

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Savin D
Creative Director
G2 Logo Star rating

Get more leads with your website!

"Happierleads provide accurate data about the website that visits my website. Knowing who is visiting my website is gold and I can spend less in ads.."

Jana M.
Robin H.
Head Of Growth at Swapcard
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faqs

Website visitor identification — frequently asked questions

How does B2B website visitor identification work?

Website visitor identification works by matching anonymous website traffic to a database of known business profiles. A lightweight tracking pixel captures signals from each session. Happierleads cross-references those signals against our proprietary permissioned publisher network — revealing the exact person (name, work email, LinkedIn profile) behind the visit, not just the company via reverse IP lookup. Person-level identification is available across 173+ countries; company-level identification works globally. Learn how our identification technology works →

What contact data does Happierleads provide for each identified visitor?

For each identified B2B website visitor you receive: full name, verified work email address, LinkedIn profile URL, job title, company name, company domain, company size, and industry — plus the specific pages they visited on your site and the duration of each session. All plans also include third-party intent signals showing what topics each identified company is actively researching across the web. See full plan details and pricing →

Does Happierleads have a Free trial?

Yes — Happierleads offers a 14-day free trial with no credit card required. During the trial you get 100 identified B2B website visitors, including full person-level data: name, verified work email, and LinkedIn profile. You can explore the full dashboard, connect your CRM, and see exactly which companies and individuals are visiting your site before committing to a paid plan. After 14 days, plans start at $99/month for 300 identified visitors. Cancel anytime — no obligation and no cancellation fees.

What is Happierleads?

Happierleads is a B2B website visitor identification platform that de-anonymizes your anonymous website traffic and turns it into actionable sales pipeline. Unlike reverse IP lookup tools that show only a company name, Happierleads identifies the exact person behind each visit — including their verified work email, LinkedIn profile, job title, and real-time buying intent signals — across 173+ countries. The platform combines visitor identification, AI lead scoring, intent data, email waterfall enrichment, built-in CRM integrations, and outreach sequencing in one place. Used by 20,000+ B2B teams globally, starting from $99/month.

Who typically uses Happierleads?

Happierleads is used by B2B SaaS companies, marketing agencies, professional services firms, and enterprise sales teams. Sales development reps (SDRs) use it to identify warm, in-market visitors and prioritise outreach by ICP fit score. Marketing teams use it to attribute revenue to specific campaigns, retarget high-intent accounts, and reduce wasted ad spend. Agencies use it to run visitor identification across multiple client websites from a single dashboard. Any B2B company investing in content marketing, paid search, or account-based marketing (ABM) will benefit from knowing exactly who is visiting their site and what they are researching.

How is this different from Clearbit, 6sense, or Demandbase’s Website Identity Solutions?

Most companies rely on ‘Reverse IP Lookup’ technology to connect IP addresses with company names. At Happierleads, we use a completely different approach—our fully-permissioned, proprietary publisher network—allowing us to identify the exact individuals visiting your website. Discover how we identify your site visitors →

Why is Happierleads ranked number #1 for data quality on G2 and Capterra?

Happierleads ranks #1 for data quality because we identify visitors through a fully-permissioned publisher network — not just reverse IP lookup. Every identified person has opted in through a publisher partner, giving us verified person-level data rather than probabilistic company-level guesses. We also apply automatic bot and ISP filtering to eliminate non-qualifying traffic, AI lead scoring to surface your highest-fit visitors, and real-time LinkedIn verification to ensure contact data is current. On G2 and Capterra, users consistently cite data accuracy and match rates as the primary reason they choose Happierleads over alternatives like Leadfeeder, Lead Forensics, and Clearbit.

What about U.S. state privacy laws, like the California CCPA and CPRA?

Yes — Happierleads is compliant with CCPA, CPRA, and other U.S. state privacy regulations. Our person-level identification uses data sourced from a fully-permissioned publisher network, meaning all identified individuals have opted in through a compliant consent framework. If your business already meets these state-level requirements, using Happierleads will not change that compliance status. We identify exact visitors in 173+ countries including the US, Canada, and Australia. For GDPR-restricted EU countries, we use reverse IP lookup to provide company-level data only, keeping you fully compliant with European privacy law.

How accurate is the visitor identification?

Most reverse-IP tools only identify the company. We go further — using our permissioned publisher network we identify the exact person behind the visit and enrich them with verified work email and LinkedIn data. Match rates depend on traffic geography, but customers typically see person-level identification on 30–55% of B2B sessions and company-level on 80%+.

How long does setup take?

About 5 minutes. Sign up, paste a single tracking snippet into your site (or install our GTM template / WordPress plugin), and identified visitors start appearing in your dashboard within a few hours. No engineering project required.

What if my website doesn't get much traffic?

You don't need huge traffic to win — most of our customers have under 10,000 monthly visitors. Even on lower-traffic B2B sites a handful of identified buyers per week often pays for the tool many times over. You can also pair it with our 175M-contact database and outreach engine to build pipeline beyond just your site visitors. And if your own traffic is still growing, we also provide third-party intent signals — data from across the web that tells you which companies are actively researching solutions like yours right now, so you can reach them even before they land on your site.

Does it integrate with my CRM and outreach tools?

Yes. Push identified leads directly into HubSpot, Salesforce, Pipedrive, Zoho, GoHighLevel, Slack, or anything that supports Zapier and webhooks. CSV export is available on every plan, and our built-in email and LinkedIn outreach engine lets you act on identified visitors without leaving Happierleads.

How does Happierleads pricing work?

Happierleads uses usage-based pricing — you choose how many identified B2B website visitors you need per month and pay only for that volume. Plans start at $99/month for 300 leads (around $0.33 per lead). As your volume grows, your cost per lead drops significantly — reaching as low as $0.06/lead at scale. Add-ons like LinkedIn verification (+$0.02/lead), email waterfall (+$0.03/lead), and session recordings (+$0.01/lead) are billed on actual usage, so you only pay for what you use.

Is there a minimum contract? Can I cancel anytime?

No minimum contract — you can cancel your Happierleads subscription at any time with no cancellation fees and no questions asked. Monthly plans are billed month-to-month. Annual plans are billed upfront and save you 30% compared to monthly billing.

What's included on every Happierleads plan?

Every Happierleads plan includes company-level and person-level visitor identification (name, verified work email, LinkedIn profile), AI lead scoring, third-party intent data signals, CRM integrations (HubSpot, Salesforce, Pipedrive, and more), a built-in email sequencer, and unlimited team seats. There are no per-seat charges — your entire team can use the platform at no extra cost.

Do you offer an annual billing discount?

Yes — switching to annual billing saves you 30% compared to monthly pricing. Annual plans also include a free 175M-contact B2B database (normally worth $500+/mo separately). The 30% discount applies to your base plan; add-ons are billed on actual monthly usage.

Is Happierleads cheaper than Lead Forensics, Leadfeeder, or Clearbit?

Yes — significantly cheaper. Lead Forensics starts at around $1,000/month, Clearbit Reveal at $1,500+/month, and Albacross at $500+/month. Happierleads starts at $99/month and includes person-level identification (name, email, LinkedIn) — a capability most competitors don't offer at any price tier. Our usage-based model also means you're never paying for leads you didn't receive.

Can I upgrade or downgrade my plan at any time?

Yes. You can adjust your lead volume up or down at any time — no lock-ins or upgrade fees. Upgrades take effect immediately and you'll be pro-rated for the remainder of the billing period. Downgrades take effect at the start of your next billing cycle.

What is the best B2B website visitor identification software?

The best B2B website visitor identification software depends on your budget, geographic coverage needs, and whether you need company-level or person-level identification. Happierleads consistently ranks #1 for data quality on G2 and Capterra in the visitor intelligence category — combining person-level identification (name, verified work email, LinkedIn), built-in outreach automation, AI lead scoring, and intent data in a single platform from $99/month. Enterprise alternatives like Lead Forensics ($1,000+/month), Clearbit Reveal ($1,500+/month), or Albacross ($499+/month) identify companies only and charge significantly more. Compare Happierleads to every major alternative →

Can I identify website visitors without cookies?

Yes — Happierleads identifies B2B website visitors using a cookieless, privacy-first method through our permissioned publisher network. Rather than relying on third-party cookies (which are being deprecated), we match first-party session signals to known B2B profiles. This means your identification rates are not affected by browser cookie restrictions, iOS privacy updates, or ad-blockers. For EU visitors under GDPR, we fall back to company-level reverse IP identification, which requires no personal data processing and keeps you fully compliant.

Is Happierleads GDPR compliant?

Yes. Happierleads is fully GDPR compliant. For EU-based visitors, we use company-level reverse IP lookup only — no personal data is processed without a lawful basis, so GDPR requirements are met by design. Person-level identification (name, email, LinkedIn) is only applied to visitors in countries outside the GDPR jurisdiction, such as the US, Canada, and Australia. Happierleads is also SOC 2 Type II certified and CCPA compliant. You can review our full Data Processing Agreement (DPA) and privacy documentation at any time. Read our privacy policy →

How does Happierleads compare to RB2B?

RB2B identifies US-based website visitors at the person level using email-based matching and delivers results to Slack. Happierleads goes significantly further: our permissioned publisher network covers 173+ countries (not just the US), and the platform is a complete B2B revenue tool — not just identification. Happierleads includes intent data across 353 buying-signal topics, AI lead scoring, a built-in email sequencer, inbox engine, CRM integrations (HubSpot, Salesforce, Pipedrive), and session recording. Both tools start at $0 for a free tier, but Happierleads paid plans include unlimited team seats and no per-seat charges. Full RB2B vs Happierleads comparison →

Does Happierleads work with WordPress, Webflow, Shopify, and other platforms?

Yes — Happierleads works with any website platform. We have a dedicated WordPress plugin, a Google Tag Manager template, and a one-snippet installation that works with Webflow, Shopify, Squarespace, HubSpot CMS, Wix, custom-built sites, and any platform that allows you to add a script to your site header. Setup takes under 5 minutes regardless of your tech stack. Identified visitors begin appearing in your dashboard within hours of installation — no developer required.

How does B2B website visitor identification help with lead generation?

B2B website visitor identification turns your existing website traffic into a direct lead generation channel. Instead of waiting for visitors to fill in a contact form — which only 2–5% of B2B visitors ever do — you can identify the other 95% by company and person, see what pages they viewed, filter by ICP criteria (company size, industry, job title), and reach out directly. Customers typically see a 3–10× increase in qualified pipeline from the same amount of traffic after installing Happierleads. Combined with built-in intent data showing which companies are actively researching your category, you can surface in-market buyers both on your site and across the web. See how visitor identification works →

Can Happierleads be used for account-based marketing (ABM)?

Yes — Happierleads is purpose-built for account-based marketing. You can filter identified visitors by target account, company size, industry, and AI ICP fit score to build prioritised ABM lists. When a company from your target account list visits your site, you can trigger real-time alerts to your sales team, automatically sync the visit to your CRM, or launch a personalised outreach sequence. Intent data across 353 buying-signal topics shows which of your target accounts are actively researching solutions like yours — even before they land on your site — so you can engage at exactly the right moment. Native integrations with HubSpot, Salesforce, and Pipedrive make it easy to align visitor intelligence with your wider ABM motion. See how marketing teams use Happierleads →

Ready to start identifying your B2B website visitors?

Join 20,000+ B2B teams already turning anonymous traffic into pipeline. 14-day free trial, no credit card required.

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