B2B Database Cleansing & Verification

@Tanmoy236

Greetings! I specialise in large-scale data cleaning and email verification with 9+ years of experience, transforming raw contact lists into accurate, CRM-ready databases. Here's how I can help: • Process and clean your 1.5M B2B contacts using reliable email verification tools to reduce bounce risks and improve deliverability. • Standardise and de-duplicate email addresses, company names, and contact names while preserving valid original data. • Apply syntax checks, domain validation, catch-all filtering, and identify incomplete or questionable records. • Deliver organised CSV/XLSX files ready for CRM and marketing platform imports with a clear audit trail. • Provide a summary report covering processed records, invalid removals, duplicate merges, and data quality insights. Could you share the current file format and the CRM/marketing platforms you’ll import into? Also, do you already have a preferred email verification service, or should I recommend one based on volume and accuracy?

@prosenjit9970

Hi, I can help you clean, verify, standardize, and organize your 1.5 million B2B contact database for CRM and email marketing. I have experience handling large datasets and follow a structured workflow to maximize email deliverability while preserving valid data. My process includes: Email verification using NeverBounce and MillionVerifier Removing invalid, risky, and duplicate email addresses Standardizing company names and contact names Flagging incomplete or questionable records Delivering a clean master file, a separate file for undeliverable contacts, and a summary report of the cleaning process I understand the importance of reducing bounce rates and preparing a database that is ready for CRM import and marketing campaigns. I pay close attention to data quality and consistency throughout the project. Before we begin, I would just like to confirm whether you will provide the verification credits/API access, or if you would like me to use my NeverBounce and MillionVerifier accounts. I am ready to start immediately and look forward to working with you. Thank you.

@gotucat

Hi, I reviewed the project and understand you need to convert a 1.5 million-record raw B2B contacts file into a campaign-ready database by cleaning, verifying, standardising, and organising the data for CRM and marketing platforms. I will run the list through proven large-scale verification tools, apply syntax and domain health checks, perform data cleansing on emails, company names, and contact names, then normalise, de-duplicate, and consolidate records. A clear audit trail will document every change, supported by data management workflows and precise data entry standards as I prepare the final CSV/XLSX for direct import. I will deliver quality, responsive communication, clean, well-documented work, and easy management with transparent milestones and quick iterations. Let’s discuss here now.

@ibnufatah92

Hi! I have extensive experience cleaning and validating large B2B databases. I can process 1.5M+ records by verifying emails, removing duplicates, standardizing company/contact names, filtering invalid, catch-all, and risky addresses, and providing a CRM-ready CSV/XLSX. You'll also receive a detailed audit report and a separate file of undeliverable contacts. I focus on maximizing deliverability while preserving valid data. Ready to start immediately.

@Muhammadzeesha59

Hello Sir/Mam I am excited to offer my expertise in Data Analysis , Data processing , Machine Learning, Automation, Data Protection, Technical Support , Computer Repair, Data Management, Data Recovery to assist . With a robust background in making case studies and projects, proficiency in R, spreadsheet tools, and Tableau, Power BI , SQL , Excel , SPSS Statistics , Data Entry . I am well-prepared to support you in your Project . My ability to deliver exceptional results on time and with utmost quality . I believe that my skill set makes me the ideal candidate for this project Please come on chat we will discuss more about this I will be waiting for your reply . Thank you !

@dattapreti

Greetings, I think you're looking for someone to clean your 1.5M-email database and then verify, standardise, and finally organise the data for import into your CRM and marketing platforms. I understand your project description very well. But can we discuss your project further for more information? I think I can do this task very effectively and also READY to start this project RIGHT NOW! So, please take a moment to chat with me. Sincerely, Preti

@mayr81

Process 1.5M B2B contacts with a deliverability-first workflow: cleaning, verification, standardisation, deduplication, and CRM-ready organisation. I’ll run large-scale email verification plus syntax, domain health, and catch-all filtering to minimise hard bounces and spam-trap exposure. Deliverables will include: (1) a cleaned master CSV/XLSX for direct import; (2) a concise summary report covering total processed, invalid removals, duplicate merges, and any fields that couldn’t be recovered; and (3) a separate file of undeliverable or questionable contacts for review. For the three required fields, email addresses, company names, and contact names, I’ll normalise formatting consistently, merge duplicates, and keep a clear audit trail of every change while preserving original still-valid data. Turnaround will be structured to support your acceptance target: <2% projected bounce rate on a random 10k test send.

@ImranAli01

Hello, I understand that your project requires the cleansing and verification of a large B2B database to ensure optimal email deliverability. For your project, my plan is to first utilize proven large-scale email verification tools to eliminate hard bounces and spam-trap risks. Next, I will standardize and de-duplicate the email addresses, company names, and contact names to ensure data accuracy. Finally, I will organize the data for seamless import into your CRM and marketing platforms. For your project, my toolset includes industry-leading email verification services for accurate validation and normalization of data. The use of these tools will guarantee a high-quality, campaign-ready database that meets your specific requirements. As final deliverables, you will receive a cleaned master database in CSV or XLSX format, ready for direct upload, along with a detailed summary report highlighting the total records processed, invalid emails removed, duplicate merges, and any fields that could not be recovered. One thing I'd like to confirm before we start: Are there any specific criteria or preferences for the audit trail documentation of data changes? Looking forward to discussing further details with you. Regards, Imran

@C0RETECHIES

Hi there, I understand you need to process a 1.5M contact list through a data cleansing pipeline to make it campaign-ready. The operation involves first using a verification service to filter invalid emails by checking syntax, domain health, and SMTP validity. The next stage programmatically standardizes company and contact names for consistency. Finally, the system will leverage this cleaned data to de-duplicate the entire list, producing a master file for your CRM. Technical approach: We'll use Python with Pandas for efficient, large-scale data manipulation. A high-volume email verification API will handle deliverability checks. Custom scripts will normalize company/contact names (e.g., handling 'LLC', 'Inc.') and implement fuzzy matching logic for robust de-duplication. The entire process is designed to run in managed batches for stability and clear traceability. I would start by processing a 10k sample to calibrate the verification and standardization rules with you. Once you approve that output, I will process the full dataset. The final deliverables will be the master CSV, the list of questionable contacts for your review, and a concise summary report detailing all changes made. Regards, Rohit

@freeks2

I’m confident I’m well suited to deliver this project to a high standard with efficiency and attention to detail. Your requirement for a cleaned, verified, and standardised database of 1.5 million B2B contacts aligns perfectly with my expertise. I have successfully handled similar datasets, ensuring minimal bounce rates and maximising email deliverability. With strong communication and a proven workflow using top verification tools, I guarantee fast turnaround and reliable delivery. My meticulous attention to detail ensures that every contact is normalised, duplicates are consolidated, and incomplete records are flagged. I’m certain I’m the right fit for this project and can deliver high-quality results with precision, efficiency, and strong attention to detail. Best Regards, F. Snyders

@goranm16

Hello, I've handled contact lists of this scale many times and your requirements line up closely with the workflow I already run. For 1.5M records I'd start by parsing and syntax-checking every email, then push them through a high-accuracy verifier like ZeroBounce or NeverBounce with MX and catch-all detection to strip hard bounces and spam-trap risks. From there I normalise company and contact names, consolidate duplicates with fuzzy matching, and flag thin records, keeping a full change log so nothing valid is lost. You'd receive the cleaned master file in CSV or XLSX ready to import, a short summary covering records processed, invalids removed and merges done, plus a separate file of risky or undeliverable contacts for your review. I'm confident of holding the test bounce rate under 2%. I'm on CET, so there's solid overlap with your hours, and I keep you updated as each batch completes. Happy to begin right away. Best regards, Goran

@carlosd178

Here’s a concise proposal tailored to the project: Hello, As a result of a detailed review of your project requirements, I fully understand the scope and deliverability goals. I can clean, verify, standardise, and organise your 1.5 million B2B contacts into a campaign-ready database while preserving all valid original data. I have experience handling large-scale contact databases and I’m available to start right away. I bring strong expertise in Data Cleansing, Data Processing, Email Verification, Data Deduplication, CRM Data Preparation, Database Administration, Data Analysis, and CSV/XLSX management. My workflow will include syntax validation, domain and MX checks, disposable and role-based email detection, catch-all and risk classification, and verification through a reliable bulk email validation service. I will then standardise contact names and company names, merge duplicates using controlled matching rules, flag incomplete records, and retain an audit field showing each action applied. You will receive: • A cleaned master file ready for CRM import • A separate invalid and questionable contact file • A summary report covering processed, removed, merged, and unrecoverable records I will structure the output to support the below-2% bounce-rate target, although final performance will also depend on sending reputation and campaign configuration. I would be glad to discuss the workflow and can start immediately. Best regards, Carlos

@patricko098

GIVE ME 30 SECONDS TO SHOW YOU WHY I'M THE RIGHT FIT FOR THIS PROJECT. I recently completed a similar project for a client with 2 million B2B contacts, achieving a bounce rate of just 1.5% after meticulous cleaning and verification. This resulted in a 30% increase in their email campaign engagement. With over five years of experience in data management and verification, I specialize in transforming raw datasets into campaign-ready formats. My proficiency in using high-accuracy verification tools ensures reliable outcomes. I understand your goal is to maximize email deliverability while maintaining the integrity of your database. My process will involve thorough checks, standardization, and organized reporting to ensure all requirements are met. I prioritize clear communication and timely execution, focusing on long-term success for your campaigns through data quality. I am confident that my expertise will deliver exceptional results for your project. The difference between an average result and an exceptional one is usually decided before the work even begins. Regards, Patricko098

@mahads31

As a seasoned technology partner with a strong focus on Data Management, your B2B Database Cleansing & Verification project aligns perfectly with my skill set. I’ve successfully delivered large-scale data cleaning projects in the past, and my extensive experience across various industries has equipped me with the ability to understand and effectively handle diverse datasets. At Solves Inn, we thrive on solving complex problems, and your project certainly fits the bill. Our approach to Data Management revolves around utilizing robust tools and ensuring high-accuracy results. Whether it's deduplication or verifying syntax, domain health, and catch-all filtering, I'll employ proven large-scale email verification tools seamlessly into our workflow. In addition to delivering a cleaned master database ready for direct upload and a brief summary report as you requested, I'll supply a separate file of undeliverable or questionable contacts for your review. Building lasting client relationships is crucial to our ethos at Solves Inn. By selecting me for this project, you can expect a seamless process, timely delivery, consistent formatting, and most importantly: complete preservation of all still-valid data upholding reliable delivery standards.

@umair982

With a project of such magnitude, choosing the right person to cleanse and verify your B2B database is absolutely crucial for ensuring high email deliverability. That's where I come in. With my solid expertise in data cleansing, entry and management, I'm well-equipped to not only handle your extensive dataset but also to drive successful outcomes through my attention to detail. My skills combined with my years of practical experience make me capable of eliminating hard bounces and spam-trap risks. By efficiently vetting your 1.5 million contacts for valid email addresses, healthy domains, and adhering to catch-all filtering ethics, I'll bring you a clean, standardised database ready for a smooth import into your CRM and marketing platforms. What sets me apart, apart from my commitment to 100% accuracy and timely delivery, is that I take each project personally. Your satisfaction is my utmost priority. Thus, I would guarantee consistent formatting across all three essential fields while ensuring no loss of original, still-valid data. Let's join hands together for efficient data processing!

@marcosfermin

Howdy! I've cleaned and verified large B2B contact lists at this scale before, so I know exactly where the risk lives, malformed syntax slipping past basic regex, catch all domains masking undeliverable addresses, and near duplicate company or contact name variants that survive a naive dedup pass and inflate your send volume. My workflow combines Python based preprocessing with pandas for normalization and deduplication, followed by bulk verification through a high accuracy service such as ZeroBounce or NeverBounce to catch disposables, role based addresses, spam traps, and MX level failures. Catch all domains get flagged separately so you can make an informed decision rather than having them silently drag down your deliverability metrics. Thank you. Marcos.

@melopgabriel

Hi, Your project is clearly about turning a very large, mixed-source B2B list into a reliable database that will protect deliverability and improve campaign performance. I’ve handled large contact-cleaning workflows where email verification, deduplication, and field standardization had to be done carefully without losing valid records. My approach would be to verify emails at scale, check syntax and domain health, filter risky catch-all records, then standardize company and contact names consistently across the file. I’d also merge duplicates, flag incomplete entries, and keep an audit trail so every change is traceable. You’ll receive a cleaned master CSV or XLSX, a summary of the changes made, and a separate file for questionable contacts. If you’d like, I can help structure the workflow for a smooth import. Best regards, Gabriel

@sanddep5

With my diverse skill set and over a decade of experience, I am uniquely qualified to assist with your B2B Database Cleansing & Verification project. I have extensive expertise in data analysis, which encompasses managing and organizing large-scale datasets such as the one you described. Working with proficiency in SQL and ETL, I have successfully cleaned, verified, standardized, and organized data for various companies with exceptional outcomes. My previous projects have demanded the highest attention to detail, catching inconsistencies and merging duplicates like the ones required in your project. My technical qualifications extend beyond just data management. As a business automation specialist, I can recommend and employ the most effective email verification tools to maximize email deliverability. Furthermore, I am skilled in handling critical databases through applications like Zoho CRM efficiently, an attribute necessary for generating the CSV or XLSX files you require for your CRM and marketing platforms. Lastly is my ethos of Scalable Solutions • Clean Code • Quality Hiring • On-Time Delivery • Long-Term Support truly aligns with your needs. With my strong work ethic, precision-driven mindset, and spatial competence in dealing with datasets, I can assure you not only a high-quality output but also an efficient turnaround time

@Jumpnest

Hello, Our team at https://www.freelancer.com/u/Jumpnest specializes in data management and optimization for B2B campaigns. With experience in handling large-scale datasets, we understand the importance of maximizing email deliverability. We have a proven workflow that involves thorough cleaning, verification, standardization, and organization of data to ensure high delivery rates. Key Focus: - Eliminating hard bounces and spam-trap risks for optimal outbound send performance. - Standardizing and de-duplicating email addresses, company names, and contact names. Scope of the Job: We will utilize advanced email verification tools to validate data integrity and apply additional checks for syntax, domain health, and catch-all filtering. Our process includes normalizing company and contact naming conventions, consolidating duplicates, and providing a detailed audit trail of all changes made. Deliverables: 1. Cleaned master database in CSV or XLSX format for seamless upload. 2. Summary report detailing records processed, invalid emails removed, duplicate merges, and flagged incomplete records. 3. Separate file of undeliverable or questionable contacts for your review. Acceptance Criteria: - Bounce-rate projection below 2% on a 10k-record test send. - Consistent formatting across essential fields. - No loss of original, valid data. We are excited to showcase our expertise in optimizing your B2B database. Let's discuss your project requirements further. Best regards, Jumpnest