Excel Email Finder: Find and Verify Emails in a Spreadsheet

An Excel email finder add-in lets you fill in missing contact emails right inside your spreadsheet. You keep your list where it is, select a column, and the add-in looks up each row. This guide shows how the Tomba add-in for Microsoft Excel works, how to install it, what it costs in credits and where its limits are.

Why use an Excel email finder inside your spreadsheet?#

Most prospect lists start in Excel. Moving them into another tool means exports, imports and mismatched columns. An Excel email finder keeps the work in one file:

• You see the results next to the original rows.
• You can sort, filter and fix data with the tools you already know.
• A teammate can open the same file and understand it.

The tradeoff is scale. Excel is fine for lists of a few thousand rows. For larger jobs, use a bulk upload instead.

What does the Tomba add-in include?#

Tomba for Microsoft Excel is a sidebar pane with these tools:

Each tool writes results to new columns or a new worksheet, so your existing data stays unchanged. The add-in also provides =TOMBA. formulas such as DOMAIN_SEARCH, FIND_EMAIL, VERIFY, ENRICH, PHONE and TECH if you prefer working in cells.

It runs on Excel for the web, Excel desktop for Windows and Mac, and Microsoft 365.

How to install and sign in#

1. In Excel, go to Insert > Get Add-ins, search for Tomba and click Add. You can also install it from Microsoft AppSource.
2. Open the Tomba pane and sign in with your Tomba account.
3. Approve the code shown in the pane on app.tomba.io in your browser. No password is typed in Excel.

Step by step: use the Excel email finder on a column#

Say your sheet has first name, last name and company domain.

1. Make sure each row has the person's name and a domain. Clean the domain column first, with no spaces or https:// prefixes.
2. Open the Tomba pane and choose Email Finder.
3. Select the columns for first name, last name and domain.
4. Check the credit estimate and start the run.
5. Keep the pane open. Closing it stops the run.
6. Read the new columns. Rows that returned nothing are blank, and you are not charged for them.
7. Run the Verifier on the new emails before you send anything.

You can process up to 1,000 rows per run for Domain Search, Email Finder or Verifier on a column. For larger jobs, run in batches or use bulk tasks, which take up to 10,000 rows per job.

What does it cost?#

Credits follow the tool:

• Domain Search: 1 search credit per 10 results requested.
• Email Finder and Enrichment: 1 search credit each.
• Phone Finder: 5 search credits, or 1 when the row has a domain.
• Verifier: 1 verification credit, kept separate from search credits.
• Reveal: 1 search credit per page of up to 50 companies, up to 20 credits per search.
• Tech stack: free, but you need a positive search balance.

Lookups that find nothing, and failed lookups, are not charged. See Tomba pricing for plans.

Where to install it from#

The add-in is distributed through Microsoft AppSource, the same store Microsoft uses for other Office add-ins. Installing from there or from Excel's own Get Add-ins menu gives the same result, so use whichever your IT policy allows. If your company blocks add-ins, ask your administrator to approve it before you plan a campaign around it.

Know the limits#

• Reveal returns up to 10,000 companies per search.
• Rate limits depend on your plan. For Email Finder the product page lists 1 request per second and 5 per day on Free, 8 per second and 4,000 per day on Pro, and no limit on Pro Plus and Scale. The add-in spaces its requests to stay within these.
• The add-in runs on demand. It cannot schedule recurring searches.

If you need scheduled syncs, use the Tomba API or an integration.

Tips for better results with an Excel email finder#

• Use the company domain, not the company name. A domain gives a cleaner match.
• Split full names. Keep first and last name in separate columns.
• Test on 10 rows. Check hit rate and credit use before the full run.
• Always verify. Use the Email Verifier to catch addresses that look right but bounce. If you also work in spreadsheets in the browser, the Google Sheets add-on follows the same idea.
• Watch the rules. If you email people in the EU or UK, check GDPR and local marketing rules first.

Frequently asked questions#

Does the add-in change my existing data?#

No. It writes to new columns or a new worksheet.

Can I run it on a schedule?#

No. It runs on demand only.

Is there a free plan?#

Tomba lists a Free plan with 25 search credits a month, and no card is needed.

How many rows can I process at once?#

Up to 1,000 rows per run in the add-in. Bulk jobs outside the add-in take up to 10,000 rows.

Get started#

Install the add-in, test it on a few rows, and use the Tomba Email Finder to fill the rest of the list.