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I need a clean, 500,000-contact B2B database covering companies in every industry and every U.S. state and Australia. For each record I have three non-negotiables: a valid business email address (no catch-alls), a direct phone number, and the company name. You may pull from any reliable source—LinkedIn Sales Navigator, ZoomInfo, Apollo, Crunchbase, public filings, etc.—as long as the data is accurate and compliant. Please validate emails (NeverBounce or similar) and confirm phone reachability to keep the bounce rate below 5 %. Deliver the file in CSV or Excel, with clearly labeled columns for: • First & last name (if available) • Company name • Business email • Phone number • State I’ll review a 1–2 k-row sample first; once approved, continue in weekly batches, completing the full 500 k within four weeks. When you respond, let me know: • The tools you’ll use to source and verify data • How you handle de-duplication and quality control • Your timeline for the initial sample Looking forward to a rock-solid list I can drop straight into our CRM.
Project ID: 40699478
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Hello, I can build this scraping/automation workflow for you and return the data in the exact structure you need. I’ve worked with Python, Selenium, Playwright, APIs, pagination, dynamic websites, data cleaning and large-scale extraction, so I can handle both the scraping and the processing side of the project. For your project, I can: Scrape the required data from your target sources Handle pagination, filters and dynamic content Clean and structure the extracted data Remove duplicates / invalid records Deliver the final data in CSV/Excel/JSON or your required format Build the workflow so it can be reused or automated if needed I can also scrape a small sample first so you can check the data quality before proceeding. If you send me the website/source + fields you need + expected output, I can review it and tell you exactly how I would approach it. I’m ready to start.
$300 USD in 7 days
3.9
3.9
21 freelancers are bidding on average $361 USD for this job

Hi, I can handle this. I’ll extract verified B2B leads from Apollo and organize them into a clean, deduplicated CSV/Excel file with the required fields. One question: Will company/main business phone numbers be accepted, or do you require personal direct phone numbers for each contact? Apollo may provide company numbers where a direct number isn’t available. I can provide the initial 1–2K sample within 1–2 days for review and then continue with the weekly batches.
$500 USD in 7 days
7.5
7.5

Hello, I can build a clean, accurate B2B database of 500,000 contacts covering U.S. states and Australia, with the required company name, business email, direct phone, and location fields. I’ll focus on verified business contacts rather than simply collecting large volumes of unvalidated data. For sourcing, I can work with reliable B2B data sources such as Apollo, ZoomInfo, LinkedIn Sales Navigator, Crunchbase, and public business sources, depending on your access and licensing. Emails will be validated through services such as NeverBounce or an equivalent verifier, and I’ll remove invalid, duplicate, and obviously risky records before delivery. For quality control, I’ll use multi-stage deduplication based on email, phone, company, and contact combinations, normalize company names and phone formats, and run consistency checks across each batch. I’ll first provide the requested 1–2K sample so you can review the data quality and format before scaling to the full database. Once approved, I can work in weekly batches toward the four-week target and deliver the final data in a CRM-ready CSV or Excel format with clearly labeled columns. I’ll also maintain consistent validation and quality standards throughout the entire collection process rather than only checking the final file.
$250 USD in 1 day
5.9
5.9

Hi There! We can build a clean 500K USA & Australia B2B database with verified business emails, direct phones, and company details, backed by a team of 62 professionals with over 9 years of experience. We’d use reliable B2B sources, NeverBounce-style verification, strict deduplication and QC, starting with a 1–2K sample before weekly batches. Would you like the initial sample focused evenly across both markets?
$500 USD in 7 days
5.5
5.5

Hi, I am Puja Rani. I have read your proposal completely. I have experience in this kind of work I am ready to start working. I am confident that I can handle it easily. If you are interested, please message me and we can discuss further
$250 USD in 7 days
4.7
4.7

Hello! I can build your 500K-contact B2B database through reliable sources, multi-step email verification, phone validation, strict de-duplication, and ongoing QC to maintain CRM-ready accuracy, then scale in weekly batches toward the 4-week target with clearly structured CSV/Excel output. With 8+ years of experience in Excel, QuickBooks, and data automation, I create accurate, efficient, and user-friendly solutions tailored to your business needs. Expertise: Advanced Excel formulas, dashboards, PivotTables, data analysis, VBA/Macros, Google Sheets automation, QuickBooks bookkeeping, transaction management, reconciliations, payroll, income/expense tracking, and financial reporting. You’ll receive clean, accurate, fully editable, and well-structured files, with clear communication and reliable delivery. Portfolio: https://www.freelancer.com/u/muhammadj121 Best regards, Junaid
$250 USD in 4 days
3.6
3.6

THIS IS A GREAT MATCH. I have just handled a similar B2B lead generation project for a tech company, delivering over 300,000 verified contacts. You need a clean, extensive database of leads that’s both accurate and compliant. I’ll leverage LinkedIn Sales Navigator and ZoomInfo for sourcing, and use NeverBounce to validate emails. De-duplication is key; I’ll implement a systematic approach to ensure quality control. The process will be straightforward and transparent, making it easy for you to track progress. REACH OUT, LET'S SEE IF WE ARE A GOOD FIT. ? Regards, Stefan.
$450 USD in 14 days
3.8
3.8

Hi , You need an expert in CRM, Leads, Data Entry, Email Marketing, Data Collection, Bulk Marketing, Database Management, Lead Generation, B2B Marketing and Email Handling, and I have a tailor-made solution ready for you. Your project brief instantly reminded me of a recent client who faced similar challenges, and I know exactly how to execute this flawlessly for your specific needs. To ensure we hit the ground running, I have three quick questions: Are there any additional technical details or constraints not mentioned in the brief? What is the primary hurdle currently blocking your progress on this? What is your strict timeline for completion? Why trust me with your project? The Record: 250+ Projects. 6+ Years. 100+ consecutive 5-star reviews. The Standard: Zero misses. I don’t just finish the job; I guarantee flawless execution. The Availability: Full-time freelancer, online 9 AM - 9 PM EST. My biggest "heavy-hitter" projects are kept off my public portfolio to protect client confidentiality. Click 'CHAT', and I’ll immediately send over relevant, private samples so you can see the standard of my work firsthand. Best regards, Muhammad Arsalan
$250 USD in 6 days
2.5
2.5

A database of 500,000 contacts is only valuable if the email addresses are valid and the phone numbers are reachable. A list with high bounce rates or unverified contacts will waste time and damage your sender reputation. Verified data with accurate company names, emails, and phone numbers will give you a list you can actually use. Sourcing and verifying 500,000 B2B contacts across every industry in the USA and Australia. Using tools like LinkedIn Sales Navigator, ZoomInfo, Apollo, or Crunchbase for sourcing, and NeverBounce or similar for email verification. Validating phone numbers for reachability to keep bounce rates below 5%. De-duplicating records and performing quality control checks throughout the process. Delivering the file in CSV or Excel with clear columns for first and last name, company name, business email, phone number, and state. A 1 to 2 thousand row sample will be provided for review first, followed by weekly batches to complete the full 500,000 within four weeks. Do you have a specific industry or state you want to prioritize first? .
$300 USD in 7 days
2.0
2.0

Hi, I am a professional web developer and I can do this project "Generate 500K USA & AU B2B Leads", I have 5 years of experience in web development. I have done many projects like this. I can do this job for you. I can start right now. Please contact me. Thanks
$250 USD in 2 days
3.0
3.0

Hi, I can build your 500K B2B database using Apollo, LinkedIn Sales Navigator, Z oo mI nfo, and e ma il verification tools like NeverBounce, with strict de-duplication, ph o ne validation, and quality checks to maintain low bounce rates. I can deliver a 1–2K sample first. Do you require specific job titles or company-size filters? Let's discuss in chat to proceed further.
$250 USD in 7 days
0.0
0.0

Hi, I’ve read your requirements carefully, and I’m confident I can build a clean, scalable 500,000-contact B2B database for the USA and Australia with validated business emails, direct phone numbers, and company data ready for your CRM. I have hands-on experience with Leads research, Email Marketing list preparation, and Data Entry workflows, including sourcing through platforms like Apollo, LinkedIn Sales Navigator, Crunchbase, and public datasets, then validating with tools such as NeverBounce while removing duplicates and structuring export-ready CSV/Excel files. I’ll start with a 1-2k sample, apply strict QC for bounce control, phone verification, column consistency, and de-duplication, then move into weekly batches to complete the full delivery within four weeks. I can begin the sample immediately and share the first batch timeline right away. Would you like the 1–2k sample segmented first by industry, state, or company size for approval? Best regards, KANIKA
$750 USD in 28 days
0.0
0.0

Hi there, I recently helped a client build a B2B database of over 300,000 contacts, and I understand the importance of having a clean, validated list. For your project, ensuring each record has a valid business email, direct phone number, and company name is crucial for effective outreach. I plan to utilize tools like LinkedIn Sales Navigator, ZoomInfo, and Apollo for sourcing. For verification, I’ll use NeverBounce to ensure the emails are accurate, and I’ll confirm phone reachability to keep the bounce rate below 5%. I also have a solid process for de-duplication and quality control, so you’ll receive a top-notch list. I can provide a 1,000-row sample within a week, and once approved, I’ll deliver the full 500,000 contacts in weekly batches. Let me know if you are available for a quick chat! Regards, Wonita
$250 USD in 7 days
0.0
0.0

We've just completed a similar project, helping a client generate a targeted B2B database that exceeded their goals within the allocated timeframe. Based on what you're looking for, I can build a clean, 500,000-contact B2B database with valid business email addresses, direct phone numbers, and company names for both the U.S. and Australia. I’ll utilize LinkedIn Sales Navigator, ZoomInfo, and Apollo for sourcing and verifying data. For quality control, I employ a thorough de-duplication process and validate all emails through NeverBounce to ensure the bounce rate remains below 5%. I can deliver an initial sample of 1–2k rows within one week for your review. Once approved, I will continue in weekly batches to complete the full list within four weeks. I'd love to discuss your project further and ensure we meet your exact needs. Regards, Ruan111.
$400 USD in 7 days
0.0
0.0

Hi, I can build this database using licensed data-provider APIs and lawful public business sources, without scraping platforms in ways that violate their access rules. The pipeline will normalise company domains, names, states, email addresses, and phone numbers before applying deterministic and fuzzy deduplication. Emails will pass syntax, DNS/MX, disposable-domain, role-address, SMTP, and catch-all checks. Catch-all and unverifiable results will be excluded. Phone quality checks can validate country format, carrier, line type, and obvious invalid/disconnected ranges. Actual human reachability cannot be guaranteed without placing calls, which must follow applicable consent, Do Not Call, TCPA, Australian Spam Act, and privacy requirements. Each batch will include source provenance, verification date, status, and quality metrics. Invalid records found through the agreed sample test can be replaced. Three technical questions: 1. Are licensed sources such as Apollo or ZoomInfo available under your own account? 2. Which job titles, company sizes, and contact seniority levels should be prioritised? 3. Will the database be used for email outreach, telephone outreach, or CRM enrichment only? Best regards, Houssame
$500 USD in 7 days
0.0
0.0

Lenoir, United States
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