// csv enrichment

Enrich 10,000 Contacts from a Spreadsheet in Minutes

Upload a CSV with names, emails, domains, or LinkedIn URLs. Tomba enriches every row with verified data emails, phones, titles, company info and gives you a clean file ready for outreach.

Upload Your First CSV Free View Bulk Tools

01POST/bulk/{type}A job that runs a finder, verifier or enrichment over a list, with a signed webhook when donePer row
02GET/email-verifierWhether an address is deliverable: syntax, MX, SMTP, catch-all and greylisting checks1 verification credit
03GET/enrichThe person behind an email address: name, role, company and profiles1 search credit
04GET/companies/findA company profile from its domain: industry codes, size, location, socials1 search credit

// teams at these companies use tomba

// 01 · workflow

The calls behind this workflow

Each step is one API call. The app, the browser extension and bulk jobs run the same endpoints, on the same credits.

GET /email-verifier

curl "https://api.tomba.io/v1/email-verifier?email=richard%40piedpiper.com" \
  -H "X-Tomba-Key: $TOMBA_API_KEY" \
  -H "X-Tomba-Secret: $TOMBA_SECRET_KEY"

const res = await fetch("https://api.tomba.io/v1/email-verifier?email=richard%40piedpiper.com", {
  headers: {
    "X-Tomba-Key": process.env.TOMBA_API_KEY,
    "X-Tomba-Secret": process.env.TOMBA_SECRET_KEY
  }
});
const { data } = await res.json();

import os, requests

res = requests.get(
    "https://api.tomba.io/v1/email-verifier?email=richard%40piedpiper.com",
    headers={
        "X-Tomba-Key": os.environ["TOMBA_API_KEY"],
        "X-Tomba-Secret": os.environ["TOMBA_SECRET_KEY"],
    },
)
data = res.json()["data"]

// 02 · how it works

Upload. Enrich. Download.

Turn a messy spreadsheet into a goldmine of verified contact data in three simple steps

01
Upload your CSV
Drag and drop any CSV file. Tomba auto-detects columns for names, emails, domains, and LinkedIn URLs. No formatting needed.
02
We enrich every row
Tomba processes each row against 450M+ contacts finding emails, verifying them, and attaching phone numbers and company data.
03
Download enriched results
Get your CSV back with added columns for email, phone, title, company, confidence score, and verification status. Ready for your CRM.

// 03 · features

Built for Speed, Not Headaches

Everything you need to process large contact lists without writing a single line of code.

Drag and Drop Upload
No formatting required. Tomba auto-detects columns and maps them to the right fields. Just drop your file and go.
Clean Export
Download results as CSV with new columns for every enriched field. Import directly into your CRM or outreach tool.
Built-in Verification
Every email is SMTP-verified during enrichment. Free verification credits included no extra tool needed.
No Charge for Empty Searches
Failed lookups are free. If Tomba can't find a valid email for a row, no credits are consumed.
Monthly or One-Time Credits
Subscribe monthly for regular campaigns or buy one-time credits for a single project. credit packs that last 12 months either way.

// 04 · tools

The tools this team uses

Person Enrichment Company Enrichment API Enrichment Google Sheets Add-on

I have run multiple side-by-side tests comparing Tomba.io against Clay waterfall enrichment and Hunter. In every case, Tomba.io delivered better results.
Aristotle MalichettyBusiness Intelligence Analyst
Tomba.io is my go-to to validate emails. Even though I might have others in a waterfall process, Tomba.io is usually the top choice.
Nuno PoçoSales Automation Architect, clickworks.io
Stellar product and amazing support. I have tested many tools and this one is far superior. I highly recommend it.
Martin EbonguéEntrepreneur, Genius Data Flow
If you use prospecting and/or data-enrichment tools, give Tomba.io a chance.
José Ramón HidalgoGrowth Hacking & Marketing, Quarizmi AdTech

// faq

CSV Enrichment Questions

Still have questions? Visit the help center

const res = await fetch("https://api.tomba.io/v1/email-finder?domain=piedpiper.com&first_name=Richard&last_name=Hendricks", { headers: { "X-Tomba-Key": process.env.TOMBA_API_KEY, "X-Tomba-Secret": process.env.TOMBA_SECRET_KEY } }); const { data } = await res.json();

import os, requests res = requests.get( "https://api.tomba.io/v1/email-finder?domain=piedpiper.com&first_name=Richard&last_name=Hendricks", headers={ "X-Tomba-Key": os.environ["TOMBA_API_KEY"], "X-Tomba-Secret": os.environ["TOMBA_SECRET_KEY"], }, ) data = res.json()["data"]

{ "data": { "email": "richard@piedpiper.com", "first_name": "Richard", "last_name": "Hendricks", "full_name": "Richard Hendricks", "website_url": "piedpiper.com", "company": "Pied Piper", "pattern": "{first}", "department": "executive", "type": "personal", "position": "CEO", "country": "US", "gender": "male", "twitter": null, "linkedin": "https://www.linkedin.com/in/richard-hendricks", "score": 100, "accept_all": false, "phone_number": true, "verification": { "date": "2025-01-15T10:32:00+01:00", "status": "valid" }, "sources": [ { "uri": "https://piedpiper.com/blog/engineering", "website_url": "piedpiper.com", "extracted_on": "2024-06-01T09:14:07+01:00", "last_seen_on": "2025-01-10T17:02:44+01:00", "still_on_page": true } ], "phone_data": [] } }

Enrich 10,000 Contacts from a Spreadsheet in Minutes

The calls behind this workflow

Upload. Enrich. Download.

Upload your CSV

We enrich every row

Download enriched results

Built for Speed, Not Headaches

Drag and Drop Upload

Clean Export

Built-in Verification

No Charge for Empty Searches

Monthly or One-Time Credits

The tools this team uses

CSV Enrichment Questions

Make your first call in a minute