Data Cleansing Services
Industry research shows roughly 20–35% of any B2B database is duplicates, undeliverable contacts or missing critical fields. That decay quietly inflates pipeline counts, burns ad spend on dead audiences, blocks sender domains and confuses every forecast. Our Data Cleansing Services systematically clear that backlog and then keep it cleared, replacing one-off audits with continuous database health.
Live · verified dataWhat’s inside the Data Cleansing Services?
Data Cleansing 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 Cleansing Services.
Each engagement starts with a free diagnostic across your CRM or file, surfacing the specific duplicates, formatting issues, decay rates and compliance gaps in your data. We then run a non-destructive cleansing flow: standardize and normalize titles, addresses and country codes; dedupe via multi-key matching you approve; re-verify emails, phones and postal addresses; and apply suppression rules. Full audit trails are preserved at every step.
Cleansed databases routinely lift email deliverability into the 95%+ range, recover sender reputation, cut CRM storage and seat fees by 20–30%, and produce reporting numbers your finance team can actually trust. Most clients start with a one-time project to clear the backlog and then move to a monthly or quarterly cadence to keep records production-ready year-round. Salesforce, HubSpot, Dynamics and most major CRMs are supported natively.
Ready to scope a Data Cleansing 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 Cleansing Works?
A repeatable, transparent workflow that gets your data production-ready — fast.
- 01
Audit your data
We run a free diagnostic across your CRM or file to identify duplicates, invalid records, missing fields and formatting issues.
- 02
Standardize & normalize
Names, addresses, titles, phone numbers and country codes are normalized to a consistent schema.
- 03
Dedupe & merge
Multi-key matching (email, domain, name+company) identifies duplicates and merges them based on rules you approve.
- 04
Re-verify & deliver
Emails, phones and postal addresses are re-verified in real time. You receive a clean file plus a quality report.
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.
Lower CRM storage & licensing costs
Deduplicated records often shrink a database by 20–40%, directly reducing per-record platform fees.
Restore campaign deliverability
Removing hard-bounce emails and invalid numbers protects your sender reputation and ad-platform domain health.
Better reporting & forecasting
Clean data gives RevOps and finance trustworthy pipeline numbers — no more inflated counts from duplicate accounts.
Free up sales time
Reps stop wasting hours on stale or duplicate records and focus on the accounts most likely to close.
Types of Data Cleansing 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 List Cleansing
Remove invalid, role-based, catch-all and high-risk emails before sending.
Phone Data Cleansing
Validate numbers, identify mobile vs. landline and flag disconnected or DNC-flagged lines.
Postal Address Cleansing
NCOA-process and standardize addresses for direct mail campaigns and account records.
Deduplication
Identify and merge duplicate contacts and accounts across your CRM using configurable match rules.
Data Standardization
Normalize titles, industries, country codes, currency and date formats to a unified schema.
CRM Hygiene-as-a-Service
Ongoing monthly or quarterly cleansing to keep your database accurate over time.
What Makes Our Data Cleansing 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 Cleansing?
What every Data Cleansing 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.
Three ways to receive your Data Cleansing
Pick the delivery format that fits your stack. All three options ship with the same compliance posture, the same 90-day replacement guarantee and the same named-operator support B2B Leo is known for.
Clean CSV
Standard delivery — UTF-8 CSV with preserved field mapping, suppression applied, ready to upload to any system that accepts a flat file.
Direct CRM sync
Push records straight into Salesforce, HubSpot, Outreach, Salesloft, Pipedrive or Apollo with field mapping handled end-to-end.
Secure SFTP / API
Encrypted SFTP drop or REST API delivery for enterprises with procurement-mandated transport. SOC 2-aligned controls applied.
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.
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Learn moreCommon questions about Data Cleansing Services.
Can’t find yours? Email the team — we usually reply within the hour.
How much of a typical CRM is bad data?
Industry research shows B2B data decays at roughly 2.5% per month. Most CRMs we audit contain 20–35% records that are duplicates, undeliverable or missing critical fields.
Will cleansing my CRM cause any data loss?
No. Our cleansing process is non-destructive — duplicates are merged, not deleted, and a full audit trail is preserved. You approve the merge rules before any change is applied.
Do you offer one-time cleansing or ongoing service?
Both. Most clients start with a one-time project to clear the backlog, then move to a quarterly or monthly retainer to keep the database healthy.
Which CRMs do you support?
We support Salesforce, HubSpot, Microsoft Dynamics, Zoho, Pipedrive and most major B2B CRMs. We can also work directly with CSV/XLSX exports.
How long does a typical cleansing project take?
Small projects (under 25,000 records) finish in 2–3 business days. Enterprise-scale cleanse + dedupe projects on multi-million-record CRMs typically complete within two weeks, with rolling delivery so you can validate as we go.
What kind of report do I get after cleansing?
Every project includes a before/after quality report — duplicate counts, invalid records removed, fields normalized, deliverability lift and a per-segment hygiene score so you can track improvement over time.
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.