B2B data append
Data appending services that complete half-empty contact records
Our data appending services take the records you already have and add what is missing: phone numbers, mailing addresses, company details, job titles and LinkedIn profiles, each one verified before delivery.
- Eight append types
- Every appended field verified
- Excel, CSV or CRM-ready output
Types of data appending services
Order one append type or several on the same file.
| Append type | What we add | Typical use |
|---|---|---|
| Email append | Verified business email addresses | Cold email and nurture campaigns |
| Mailing address append | Street, city, state, ZIP and country | Direct mail and territory planning |
| Phone append | Direct dials and business numbers | Sales calls and follow-ups |
| Company append | Size, revenue, industry, headquarters | Account scoring and segmentation |
| LinkedIn append | Profile URLs for each contact | LinkedIn prospecting and outreach |
| Fax append | Company fax numbers from directories | Healthcare, legal and government outreach |
| Reverse append | Name, company and role from an email or phone | Identify inbound leads |
| Social append | LinkedIn, X and other professional profiles | Social selling |
Our seven-step data appending process
Appending is only useful if the new data is right, so most of the work happens after the match.
1. Database analysis
We review your file for missing fields, outdated values and duplicates.
2. Data enrichment
Missing fields are found through trusted sources, AI tools and manual research.
3. Verification
Every appended value is validated through more than one check.
4. Duplicate removal
Repeat records are removed so each contact appears once.
5. Standardization
Names, addresses, phones and company fields follow one format.
6. Internal database pull
Data from Google, LinkedIn, Maps and directories is matched to your records.
7. Quality assurance
A final review confirms every field is accurate, complete and in place.
Delivery
You receive the file in Excel, CSV or a CRM-ready format.
How B2B data appending improves outreach
Incomplete records are the quiet reason campaigns underperform. Without a job title you cannot segment, without a phone you cannot call, and without a company size you cannot tell a good account from a poor one.
Business data appending fills those gaps on the records you already paid to acquire. Your team spends less time researching each prospect and more time talking to them.
- Segment by role, industry and company size
- Run email, phone and LinkedIn from one record
- Stop sending to contacts who no longer fit
- Import straight into your CRM or outreach tool
| Field | Before | After |
|---|---|---|
| Name | Dr. Maria Lopez | Dr. Maria Lopez |
| Title | Empty | Medical Director |
| Phone | Empty | +1 512 *** 4410 |
| Empty | linkedin.com/in/m*** | |
| Company size | Empty | 51-200 |
Who uses business data appending
Sales teams
Reps get direct phones and current titles on accounts they already own, instead of researching each one.
Marketing teams
Event, webinar and form leads gain company size and industry, so they can be scored and segmented.
Agencies
Client lists are completed before a campaign launches, across email, phone and LinkedIn.
Operations and RevOps
CRM records are filled out before a migration, a territory plan or a reporting project.
Data append cost: what changes the price
Our data appending services are quoted per file. These four factors set the price.
| Factor | Why it matters |
|---|---|
| Number of records | More records take more matching and checking. |
| Fields to append | Each append type is a separate search, so more fields cost more. |
| Input quality | Records with a full name and company match faster than partial ones. |
| Hard-to-find data | Direct dials and niche roles need more manual research. |
Data appending services match your existing records against other trusted sources and add the fields you are missing, such as phone numbers, mailing addresses, job titles, company details or LinkedIn profiles. The appended data is verified before it is added.
Business emails, direct and company phone numbers, mailing addresses, fax numbers, job titles, departments, seniority, company size, revenue, industry, headquarters location and LinkedIn or other social profiles. You choose which fields to add.
Reverse appending starts from an email address or phone number and adds the person behind it: name, company and job role. It is useful for identifying inbound leads and old records with only an email.
Your enriched file comes back in Excel, CSV or a CRM-ready format that matches your import template, with the original columns kept and new ones added alongside, so nothing in your file is overwritten.
It depends on file size and how many fields you need appended. Most projects are finished within a few days once we have the file and agree the fields to add.
We quote per file. Price depends on record count, the fields you add and how complete your input is. We check a sample first.
Records with a full name, company and website match best. After the sample check, we tell you how many records we expect to complete.
Further reading
- General Data Protection Regulation (GDPR) The full EU GDPR text, useful when you contact people in Europe.
- ICO guidance on direct marketing UK rules for marketing by email, phone and text.
- FTC CAN-SPAM Act compliance guide The US rules for commercial email, including opt-out handling.
Send us the file with the gaps
Tell us which fields you need. We will check a sample of your records and quote the full append.