Data Verification Services
Email and phone verification is the cheapest insurance you can buy against deliverability failure. A single bad-domain blast can blacklist a sender domain for weeks; a few too many disconnected dials can flag your number for spam-likely treatment. Our Data Verification Services confirm every record's deliverability — in batch or in real time — so what you send actually lands.
Live · verified dataWhat’s inside the Data Verification Services?
Data Verification Services turns your existing records into clean, routable, bookable pipeline. Upload your file or stream records in real time; we return enriched, deduped, verified contacts ready for your reps.
We integrate natively with Salesforce, HubSpot, Microsoft Dynamics, Marketo and Pardot — pushing cleaned, enriched and verified records directly into your stack so your team operates from a single source of truth.
Processing is batch or real-time, depending on your needs — bulk file appends typically turn around in 24-48 hours, and real-time API calls return enriched records in under 250ms for live workflows like form-fill enrichment or lead routing.
Every output is delivered with a clear provenance audit — which sources contributed which fields, when each field was last verified, and the confidence score behind each enrichment — so your data team can defend the inputs in any internal review.
Every record is multi-source verified across our 180M+ universe and 40+ public and proprietary data signals, with continuous refresh available so the data ages with the market rather than against it.
Every record is permission-based, re-verified at the moment of delivery, and filtered through regional compliance rules — so your campaigns land clean and deliverable.
What you can expect
The outcomes our clients consistently see from this program.
- Match rate 95%+ on typical files
- Batch or real-time API
- Confidence scoring per record
- Ongoing refresh optional
A closer look at our Data Verification Services.
Email verification runs syntax, domain, SMTP and risk checks, returning each record classified as deliverable, catch-all, role-based, disposable or invalid. Phone verification uses live HLR lookups to confirm active line status, identify mobile vs. landline, scrub against DNC registries and detect carrier reassignment. Records ship back with deliverability status, confidence score and risk tier so your team knows what to send, what to quarantine and what to suppress entirely.
Inline real-time verification at form-submit and lead-capture keeps your CRM clean from the moment a record is created — without adding visible latency (responses average under 300ms). Batch verification on existing lists typically returns 98%+ accuracy on standard B2B domains, with catch-all and high-risk segments flagged for separate handling. The result is protected sender reputation, lower ad-platform CPMs and pipeline forecasts you can defend in front of a board.
Ready to scope a Data Verification engagement? Talk to a real operator — you'll get a written scope, a sample of 25–50 verified records, and a confirmed delivery date within one business day.
Built to deliver — or it ships back free.
95%+ deliverability
Every record re-verified at the moment of request.
Multi-source verified
Cross-referenced across 40+ public and proprietary sources.
Compliance baked in
GDPR, CCPA and CAN-SPAM applied automatically.
Delivered in 48 hours
Most lists ship same day. Full ICP builds in 48 business hours.
Built for modern revenue teams
Own a number? This is built for you.
SDR, AE and RevOps teams we work with daily.
10-person teams to Fortune 500 revenue orgs.
White-label delivery available.
How Our Data Verification Works?
A repeatable, transparent workflow that gets your data production-ready — fast.
- 01
Submit records for verification
Upload a file, paste a list or call our API in real time — single record or millions at a time.
- 02
Multi-layer validation
Each email and phone goes through syntax, domain, SMTP, deliverability and risk checks. Phones are HLR-verified live.
- 03
Score and classify
Records are returned with deliverability status, risk tier and confidence score so you can decide what to send.
- 04
Send with confidence
Use clean records immediately for campaigns, while quarantining catch-all and high-risk records for further review.
How Can It Benefit Your Business?
Cleaner data isn't the goal — measurable revenue impact is. Here's what changes when this layer is fixed.
Protect sender reputation
Removing invalid emails before sending keeps bounce rates low and inbox placement high.
Reduce wasted ad spend
Verified audiences uploaded to LinkedIn, Meta and Google match better and cost less per qualified impression.
Compliance with TCPA & DNC
Phone verification scrubs against DNC registries and identifies mobile vs. landline for TCPA compliance.
Accurate forecasting
When every record is known-deliverable, conversion benchmarks become reliable inputs to revenue forecasts.
Types of Data Verification We Provide
Choose a single service or combine them into an end-to-end data program — we tailor scope to your stack and ICP.
Email Verification
Syntax, domain, SMTP and risk classification — including catch-all and disposable detection.
Phone Verification
Live HLR lookup, line type (mobile vs landline) and DNC status across US and international registries.
Real-Time API Verification
Verify at point of capture — forms, signup flows and inbound lead webhooks.
Batch List Verification
Upload existing lists and receive a verified, scored output file in hours.
Postal Address Verification
USPS / NCOA validation for direct mail campaigns and account billing records.
Identity Verification
Confirm contact name, employer and role through multi-source corroboration.
What Makes Our Data Verification Unique?
How Data Is Sourced and Verified?
Every record on this list passes through a four-stage compile-and-verify process before delivery.
- 01
Multi-source compile
Records are aggregated from public business directories, professional networks, permissioned partner feeds and proprietary research signals.
- 02
Email & phone verification
Every email is SMTP-verified and every phone is HLR-validated at the moment of delivery — not at last refresh.
- 03
Tele- & manual verification
A sample of records on every list is human-verified by trained agents to confirm role, employer and contact accuracy.
- 04
Suppression & dedupe
Opt-out, DNC and bounce suppression are applied before delivery, with multi-key dedupe to ensure clean ingestion into your CRM.
Data Privacy Compliance Framework
Every record on this list is filtered through global and region-specific privacy regulations before it ever reaches you.
GDPR & UK GDPR
Lawful-basis framework with documented legitimate-interest balancing tests for EEA and UK business contacts.
CCPA / CPRA
California Consumer Privacy Act compliance with opt-out routing and verifiable consumer request handling.
CAN-SPAM Act
Sender identification, opt-out support and physical address compliance applied to every record.
TCPA & DNC
Phone records scrubbed against the National DNC Registry and applicable state-level DNC lists.
CASL (Canada)
Canadian Anti-Spam Legislation applied to all Canadian contacts before delivery.
Internal controls
Encryption in transit (TLS 1.2+) and at rest (AES-256), least-privilege access, signed DPAs and SOC 2-aligned controls.
Data Sources
We never rely on a single source. This list is compiled and cross-validated from the channels actually trusted in this category.
Who Can Use Our Data Verification?
What every Data Verification delivers
Every order ships with the same operating standard — built to drop into your stack, run a quarter cleanly and stand up to scrutiny from procurement, legal and finance.
Multi-source verification
Each record is cross-validated against partner directories, public filings, professional networks and our proprietary B2B graph. Email validity, phone reachability and role accuracy are checked at the moment of delivery, not at last refresh.
CRM-ready format
Lists ship as a clean CSV plus optional direct sync into Salesforce, HubSpot, Outreach, Salesloft, Pipedrive and Apollo. Field mapping is preserved so your sequences trigger without manual cleanup or re-mapping.
Compliance posture, documented
GDPR, UK GDPR, CCPA/CPRA, CAN-SPAM, CASL, TCPA and DNC checks are applied before delivery. We sign DPAs on request and provide written compliance documentation suitable for procurement and legal review.
Replacement guarantee
Any record that hard-bounces, is unreachable or has a verified role mismatch is replaced free of charge for 90 days. The guarantee is unconditional — no support tickets, no proof required beyond the bounce log.
Continuous refresh
B2B contacts decay roughly 30% per year. We re-verify every record continuously against role-change signals, employer changes and tech-stack movement, so a list licensed in Q1 still routes pipeline cleanly in Q4.
Named operator support
Every engagement is owned by one named operator from brief to closed-won. No SDR routing, no ticket queue, no handoff — just a real person who has carried a quota and replies within one business day.
The Data Verification at a glance
We measure every list against the same operating benchmarks. These are the numbers B2B Leo holds itself to on every order.
From ICP brief to live campaign in 7 business days.
Every engagement runs on the same four-step cadence — scoped on day one, delivered by day seven, measured to closed-won every week after that.
- 01
Day 1 · Brief & scope
30-minute ICP call with a real operator (not an SDR). We lock titles, geographies, tech-stack filters, exclusion rules and suppression lists. You leave the call with a written scope and a confirmed delivery date.
- 02
Day 2–4 · Build & verify
Multi-source compile against our 180M+ B2B graph, then tele-verification on a statistically valid sample, SMTP validation on every email and phone-line testing on every direct dial. Suppression and dedupe run last.
- 03
Day 5–7 · Load & launch
Delivered as a clean CSV plus optional direct push into Salesforce, HubSpot, Outreach or Salesloft. Field mapping preserved. Sequences kick off the same day we deliver — no manual cleanup needed.
- 04
Ongoing · Measure to revenue
Weekly revenue review with one named operator. Bounces and role mismatches are replaced free of charge for 90 days. Performance is reported against pipeline and closed-won, not opens or clicks.
More in Data Solutions
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Dedupe, re-verify and normalize your CRM.
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Learn moreB2B Matching Services
Match your file against our 180M+ universe.
Learn moreBusiness Phone Appending
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Learn moreData Building Services
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Learn moreCommon questions about Data Verification Services.
Can’t find yours? Email the team — we usually reply within the hour.
How accurate is your email verification?
Our verification typically delivers 98%+ accuracy on standard B2B domains, validated through multi-step checks including SMTP and risk classification. Catch-all domains are flagged separately rather than passed as valid.
What's the difference between verification and validation?
Validation usually means syntax/format checks only. Our verification goes further — confirming the mailbox actually exists and is deliverable via live SMTP probes, plus risk scoring for catch-all, role-based and disposable addresses.
Can I verify records in real time as they come in?
Yes. Our REST API returns a verification result in under 300ms, ideal for form submissions, signup flows and live lead capture.
Do you handle international phone verification?
Yes. We support 200+ countries with live HLR lookups, line-type detection and DNC scrubbing where registries are available.
Will verification slow down our signup form?
No. Our real-time API responds in under 300ms with 99.9% uptime — verification happens inline during form submission without any visible lag to the user.
How long do verification results stay valid?
Email and phone verification results have a recommended freshness of 30 days for marketing use and 7 days for high-stakes outbound. We can re-verify in bulk at your chosen cadence.
Let's build a pipeline you can actually close.
Tell us your ICP, your goals, and one painful bottleneck. We'll come back with a concrete 30-day plan — no pitch deck, no pressure.