You have a list of ideal fit companies. You have the company names and websites. You have no idea who to contact.
The manual approach is familiar: search each company on LinkedIn, filter by title, open profile after profile, copy and paste names and emails. A few hours later, you have 12 leads from 25 companies. Then tomorrow you start over.
There is a faster way. We started with a list of 50 company domains and used the Scalelist Google Sheets add-on to find 312 leads across all 50 companies in under 2 minutes. One click. Every lead came with a name, email, job title, department, seniority, and LinkedIn URL.
This post shows exactly how prospect list building works using this approach.
What Is the Problem with Manual Prospect List Building?
Manual prospect list building means searching for contacts at target companies one at a time. You use LinkedIn, Google, or other platforms. You filter by title, open profiles, copy data to a spreadsheet, and repeat the process for the next company.
This approach does not scale. Most alternative tools require annual contracts or thousands of dollars upfront. That forces you to commit to a tool you have not tested yet.
The Scalelist add-on offers a third option. You pay only for the successful results that come through. No annual contract. No minimum spend.
What Do You Need to Start Prospect List Building in Google Sheets?
You need two things: a Google Sheet with company names or domains, and a Scalelist account.
Your spreadsheet does not need any contact names. Scalelist works from company names or company websites alone. That is the starting point for this workflow.
Get free credits to start at scalelist.com.
How to Install the Scalelist Google Sheets Add-On
- Open your Google Sheet.
- Click Extensions in the top menu.
- Go to Add-ons and select Get add-ons.
- Search “Scalelist” in the Google Workspace Marketplace.
- Click “Scalelist email and phone finder” and hit Install.
- Grant the required permissions.
- Once installed, go to Extensions and click Scalelist, then Open.
The add-on opens as a sidebar on the right side of your screen.
How to Connect Your Scalelist Account to Google Sheets
The add-on needs an API key to connect to your Scalelist account.
- Go to scalelist.com and create an account.
- In the Scalelist dashboard, click API in the left navigation.
- Click the blue “New Key” button.
- Copy the API key.
- In the Google Sheets sidebar, click “Update API key.”
- Paste your key and hit Save.
Your available credits will appear at the bottom of the sidebar.
How to Build a Prospect List from Company Domains
In the add-on sidebar, you will see three tabs: Leads, Emails, and Phone.
The Leads tab is where you build a prospect list from just company names or domains. This is different from the Emails or Phone tabs, which require existing contact names.
For bulk list building:
- Click the Leads tab in the sidebar.
- Click the bulk search option.
- Map your domain column.
- Check the “Table has headers” box if your spreadsheet has a header row.
- Choose how many leads per domain: 10, 25, 50, or 100.
- Click “Find Leads.”
Scalelist searches across all domains at once. The process runs automatically.
What Data Does Prospect List Building Return?
From a starting list of 50 company domains, the add-on returned 312 leads in under 2 minutes.
Every lead came with these columns added directly to the spreadsheet: first name, last name, email, job title, department, seniority, LinkedIn URL, email status (valid or risky), and a found/not-found indicator.
Valid means the email has been found and is confirmed deliverable. Risky means the email was found but is unconfirmed for deliverability. You decide whether to use risky emails.
Every email found costs 1 credit. Emails not found cost zero credits. Email verification is included in the cost of each credit.
Can You Also Use the Scalelist Chrome Extension for Prospect Research?
Yes. The Scalelist Chrome extension is a complementary tool for one-at-a-time prospect research. When you are browsing a company website or LinkedIn profile, the extension lets you find contact data without leaving the browser.
The Google Sheets add-on is better for bulk list building from company domains. The Chrome extension is better for researching individual prospects as you browse. Both use the same Scalelist account and credits.
Frequently Asked Questions
What does prospect list building mean?
Prospect list building is the process of identifying and compiling a list of potential customers, including their contact information and relevant details. For B2B outbound teams, this typically means finding the names, emails, and job titles of decision-makers at target companies.
How do you build a B2B prospect list quickly?
Use a tool that works from company domains rather than requiring you to start with contact names. The Scalelist Google Sheets add-on accepts a list of company names or websites and returns leads with names, emails, job titles, and LinkedIn URLs in minutes.
How many leads can you find per company domain?
With the Scalelist add-on, you can choose to find 10, 25, 50, or 100 leads per domain. In our test, 10 leads per domain returned 312 leads across 50 companies in under 2 minutes.
How much does outbound lead generation with Scalelist cost?
Scalelist charges 1 credit per email found. Emails not found cost zero credits. There are no annual contracts or minimum spend requirements. Email verification is included in each credit.
What information does each lead include?
Each lead returned by the Scalelist add-on includes first name, last name, email address, job title, department, seniority level, LinkedIn URL, email status (valid or risky), and a found/not-found indicator.
Conclusion
Prospect list building from company domains used to mean hours of manual research on LinkedIn. The Scalelist Google Sheets add-on eliminates that entirely.
Add your company list to a Google Sheet. Install the add-on, connect your API key, and click Find Leads. We found 312 leads from 50 companies in under 2 minutes. Every lead came ready to contact, with email, title, seniority, and LinkedIn URL included.
The order of operations that decides whether the list works
Prospect list building fails in a predictable order, and the order is almost always the same: the list was assembled before the criteria were written down. Everything downstream inherits that.
- Define the account before the person. Write the company profile first: size band, industry, region, and any technology or operational signal that indicates the problem you solve exists there. If you cannot write this in three sentences, no list will fix it.
- Choose roles by ownership, not seniority. Identify who owns the outcome you affect. Reaching upward for seniority produces polite forwarding at best.
- Set the depth per account. Two to three contacts per account is usually right. One is fragile if that person leaves. Eight looks like a spray to anyone comparing notes internally.
- Attach contact data last, and at export. Verification decays, so the value of a verified email is a function of when it was verified.
- Set an expiry before you build. Decide up front how long this list stays valid and what triggers a refresh, otherwise it silently ages while producing declining results that look like a messaging problem.
Sizing: how big should the list be
Most teams build lists far larger than they can work, which guarantees that the majority of records go stale before anyone touches them. Work backwards from capacity instead.
A rep can meaningfully work roughly 30 to 50 new accounts a week across a multi-touch sequence. Over a quarter that is 400 to 650 accounts per rep. Building a 10,000-account list for a two-rep team means around 90 percent of it will decay before it is worked, and you will have paid to enrich all of it.
The practical rule: build one quarter of capacity at a time, refresh at the boundary, and spend the money you save on better targeting rather than more volume.
Quality checks before the list goes to a rep
| Check | Threshold | What a failure means |
|---|---|---|
| Bounce rate on a 100-record test send | Under 2 percent | Verification is weaker than claimed |
| Wrong-person replies | Under 10 percent | Role targeting is wrong |
| Contacts per account | 2 to 3 | Too few is fragile, too many reads as a spray |
| Records missing a phone number | Track it | Decides whether a call motion is viable at all |
| Accounts already in CRM as customers | Zero | Suppression failed |
| Median record age | Under 90 days | The list is ageing faster than it is being worked |
Where this fits
This page covers the build. How to build a prospect list walks the same process step by step, prospect list monitoring covers keeping it current once built, and B2B prospecting tools covers the tooling. For the metrics that tell you whether the list is working, see outbound sales metrics.
Frequently asked questions
What is prospect list building?
The process of defining an account profile, selecting the roles that own the problem you solve, and attaching verified contact details, in that order. The order matters more than the tooling.
How big should a prospect list be?
Work backwards from capacity. A rep can meaningfully work roughly 30 to 50 new accounts a week, so build about one quarter of capacity at a time and refresh at the boundary rather than building a list that decays before it is worked.
How many contacts should you have per account?
Two to three for most B2B motions. One is fragile if that person leaves, and eight reads as a spray to anyone at the account comparing notes internally.
When should contact data be verified?
At export rather than at collection. Verification decays, so an email verified when the record was first collected carries a claim that may have expired months ago.
