Ranked October 2026 · 10 tools compared

These are the 10 best contact enrichment APIs of 2026.

1Lookup is our pick for 2026: send a name and a company domain and get a work email back, or a verified work email with title and seniority from B2B contact append, through the API or a CSV upload. A lookup that finds no one is not charged, there are no seats, and the 7-day free trial needs no payment today.

Start a 7-day free trial See how 1Lookup email enrichment works

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1. 1Lookup
2. FullEnrich
3. Prospeo
4. Lusha
5. People Data Labs
6. Dropcontact
7. Clay
8. Cognism
9. ZoomInfo
10. Kaspr

We ranked these tools on five things a buyer pays for.

1What one lookup returns
2Whether a lookup that finds no one is charged
3How it bills: seats, credit packs or quotes
4Whether your own code can call it
5How you can start for free

Each tool was read on its own pricing page in October 2026.

Here are the 10 tools, ranked.

Our pick

1. 1Lookup

Best for paying per contact found, with no seats

What comes back: A work email from a name and company domain, or a verified work email with title and seniority from a name and company, an email or a LinkedIn URL
When nothing is found: Not charged: a work email or contact lookup that finds no one uses no credits
How it bills: 5 credits per work email found, about $0.02 on the $99 a month Starter plan, or 75 credits per full contact, about $0.37

Why it’s on the list: it charges per contact found rather than per seat, and the same credits verify the email, validate a phone number and scrub it against Do Not Call before anyone reaches out.

Also included: an email for a name and postal address (email append) is 10 credits a lookup, email enrichment lists run by CSV upload in the dashboard, every product runs through the API, the 7-day free trial needs no payment today, and unused monthly credits roll over for 3 months, and the same account comes with an MCP server for AI agents and Zapier, Make and n8n apps.

Source: 1lookup.io homepage, captured August 2026

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2. FullEnrich

Best for mobile numbers found across several sources

What comes back: Work emails, mobile phones and personal emails, searched across several data sources in turn, with email and phone verification.
When nothing is found: Only pay for data you actually find.
How it bills: Monthly credits: 1 per work email, 3 per personal email and 10 per mobile phone. Credits roll over for 3 months on monthly plans.

Why it’s on the list: it searches several data sources in turn for work emails, personal emails and mobile phones, and charges only for data it finds.

Watch for: a mobile phone costs 10 credits against 1 for a work email.

Source: fullenrich.com homepage, captured August 2026

1Lookup vs FullEnrich: full comparison

3. Prospeo

Best for building lead lists and enriching them in one tool

What comes back: Verified business emails and direct mobile numbers, with search filters and intent topics.
When nothing is found: Not stated on its pricing page
How it bills: Credits per user per year on paid plans: 1 credit per verified business email, 10 per direct mobile number.

Why it’s on the list: its search filters and intent topics find leads, and the same credits reveal verified business emails and direct mobile numbers.

Watch for: paid plans are billed per user, and a direct mobile number costs 10 credits.

Source: prospeo.io homepage, captured August 2026

1Lookup vs Prospeo: full comparison

4. Lusha

Best for sales teams starting free with emails and phones

What comes back: Verified emails and phone numbers, with company data.
When nothing is found: Not stated on its pricing page
How it bills: Paid plans grant a yearly pack of credits upfront; the free plan has 40 credits a month.

Why it’s on the list: it returns verified emails and phone numbers with company data, and the free plan needs no credit card.

Watch for: the API and CSV enrichment start on the Pro plan, and paid credits are granted as a yearly pack.

Source: lusha.com homepage, captured August 2026

1Lookup vs Lusha: full comparison

5. People Data Labs

Best for products that need person records by API

What comes back: Person records through its APIs, with emails, phone numbers and addresses on paid plans.
When nothing is found: Not stated on its pricing page
How it bills: Monthly or yearly subscriptions by record volume, with volume discounts; enterprise volumes by contract.

Why it’s on the list: its APIs return full person records, and paid plans add emails, phone numbers and addresses.

Watch for: the free plan hides contact data, so emails and phones need a paid plan.

Source: peopledatalabs.com homepage, captured October 2026

6. Dropcontact

Best for European teams enriching B2B emails

What comes back: B2B emails, with its own email validation and catch-all verification.
When nothing is found: Pay on success
How it bills: Monthly credit plans priced in euros, paid on success. Credits carry over on the Growth plan.

Why it’s on the list: it finds B2B emails, validates them itself including catch-all domains, and charges on success.

Watch for: its plans are priced in euros, and its pricing page lists emails, not phone numbers.

Source: dropcontact.com homepage, captured October 2026

7. Clay

Best for teams that build their own enrichment workflows

What comes back: Data from several providers in one table, run as a waterfall, plus web research by its AI agent. Phone numbers start on the Launch plan.
When nothing is found: If an enrichment returns no result, you're not charged Data Credits or Actions.
How it bills: Plans with a yearly allowance of actions and data credits. Bringing your own provider API keys skips data credits.

Why it’s on the list: one table runs several providers in turn plus research by its AI agent, and an enrichment with no result is not charged.

Watch for: phone enrichment starts on the Launch plan, and HTTP API integrations and webhooks start on Growth.

Source: clay.com homepage, captured October 2026

8. Cognism

Best for larger teams that want mobiles with compliance checks

What comes back: Emails, mobiles, job titles and work history, with company revenue, headcount, technology and signals.
When nothing is found: Not stated on its pricing page
How it bills: Plans with 5 seats included, priced by its sales team. One credit reveals one contact, and viewing a contact you already revealed is free.

Why it’s on the list: it returns emails, mobiles, job titles and work history with company data and signals, and viewing a contact you already revealed is free.

Watch for: each plan includes 5 seats, and prices come from its sales team.

Source: cognism.com homepage, captured October 2026

9. ZoomInfo

Best for large sales teams buying a full data platform

What comes back: Email addresses, direct dial and mobile phone numbers, company insights and buying intent signals.
When nothing is found: Not stated on its pricing page
How it bills: Packages by quote; its pricing page collects your details instead of listing prices.

Why it’s on the list: it pairs emails, direct dial and mobile numbers with company insights and buying intent signals.

Watch for: its pricing page lists no prices; packages come by quote.

ZoomInfo homepage — Source: zoominfo.com homepage, captured August 2026

1Lookup vs ZoomInfo: full comparison

10. Kaspr

Best for prospecting from LinkedIn

What comes back: B2B emails, phone numbers and direct emails, through its Chrome extension and on LinkedIn Sales Navigator.
When nothing is found: Not stated on its pricing page
How it bills: Monthly plans per user, with separate email, phone and direct email credits.

Why it’s on the list: its Chrome extension finds B2B emails, phone numbers and direct emails while you browse LinkedIn and Sales Navigator.

Watch for: plans are per user, and full API access starts on the Business plan.

Source: kaspr.io homepage, captured October 2026

1Lookup charges per contact found, with no seats, through the API or a CSV upload.

1. 1Lookup
What comes back
Work email; title and seniority
Misses
Not charged
How you reach it
API, CSV upload, MCP server
Free start
7-day free trial
2. FullEnrich
What comes back
Work and personal emails, mobiles
Misses
Not charged
How you reach it
API, MCP, CRM, no-code
Free start
A free trial with 50 credits and no credit card
3. Prospeo
What comes back
Business emails, direct mobiles
Misses
Not stated
How you reach it
API and CSV from Starter
Free start
A free plan with 100 credits a month
4. Lusha
What comes back
Emails, phones, company data
Misses
Not stated
How you reach it
API and CSV from Pro
Free start
A free plan with 40 credits a month and no credit card
5. People Data Labs
What comes back
Person records, contact data
Misses
Not stated
How you reach it
APIs, CSV on Pro
Free start
A free plan with up to 100 credits a month, contact data not included
6. Dropcontact
What comes back
B2B emails
Misses
Pay on success
How you reach it
API, MCP, files, Sheets
Free start
50 free credits
7. Clay
What comes back
Many providers, AI research
Misses
Not charged
How you reach it
Clay tables; HTTP API on Growth
Free start
A free plan with 1,200 data credits a year, and a 14-day trial
8. Cognism
What comes back
Emails, mobiles, work history
Misses
Not stated
How you reach it
MCP, API, CSV
Free start
None listed
9. ZoomInfo
What comes back
Emails, direct dials, mobiles
Misses
Not stated
How you reach it
CRM and custom integrations
Free start
A free trial
10. Kaspr
What comes back
Emails, phones, direct emails
Misses
Not stated
How you reach it
Chrome extension, CSV, API on Business
Free start
A free plan with 15 B2B email, 5 phone and 5 direct email credits a month

Tool	What comes back	Misses	How you reach it	Free start
1. 1Lookup	Work email; title and seniority	Not charged	API, CSV upload, MCP server	7-day free trial
2. FullEnrich	Work and personal emails, mobiles	Not charged	API, MCP, CRM, no-code	A free trial with 50 credits and no credit card
3. Prospeo	Business emails, direct mobiles	Not stated	API and CSV from Starter	A free plan with 100 credits a month
4. Lusha	Emails, phones, company data	Not stated	API and CSV from Pro	A free plan with 40 credits a month and no credit card
5. People Data Labs	Person records, contact data	Not stated	APIs, CSV on Pro	A free plan with up to 100 credits a month, contact data not included
6. Dropcontact	B2B emails	Pay on success	API, MCP, files, Sheets	50 free credits
7. Clay	Many providers, AI research	Not charged	Clay tables; HTTP API on Growth	A free plan with 1,200 data credits a year, and a 14-day trial
8. Cognism	Emails, mobiles, work history	Not stated	MCP, API, CSV	None listed
9. ZoomInfo	Emails, direct dials, mobiles	Not stated	CRM and custom integrations	A free trial
10. Kaspr	Emails, phones, direct emails	Not stated	Chrome extension, CSV, API on Business	A free plan with 15 B2B email, 5 phone and 5 direct email credits a month

Rival features from each tool's own pricing page, October 2026. "Not stated" means its pricing page does not say whether a lookup that finds no one is charged. 1Lookup: email enrichment is 5 credits per work email found, about $0.02 on the $99 a month Starter plan.

These are the questions buyers ask most about contact enrichment.

What is the best contact enrichment API in 2026?

1Lookup. Send a name and a company domain and get a work email back for 5 credits, or a verified work email with title and seniority for 75 credits with B2B contact append. A lookup that finds no one is not charged, there are no seats, and the same credits verify emails and check phone numbers.

What is contact enrichment?

Contact enrichment fills in what a record is missing, usually a work email, a phone number, a job title or company details, from what you already have, such as a name and a company. Sales and marketing teams use it to complete lead lists and CRM records before outreach.

How much does contact enrichment cost?

Tools bill one of four ways: credits on a monthly plan (FullEnrich, Dropcontact, People Data Labs); a credit pack per user or per seat (Prospeo, Lusha, Kaspr); an allowance of actions and data credits (Clay); or a package by quote (ZoomInfo, Cognism). 1Lookup charges per contact found: 5 credits per work email, about $0.02 on Starter and $0.01 on Enterprise, and 75 credits per full contact, about $0.37 on Starter and $0.15 on Enterprise, from the same credits that pay for all 44 data products.

Am I charged when no email is found?

Not with 1Lookup's email enrichment or B2B contact append: a lookup that finds no one uses no credits. Among the other tools, FullEnrich, Dropcontact and Clay say on their pricing pages that misses are not charged.

Should I verify enriched emails before I send?

Yes. 1Lookup's B2B contact append returns a verified work email with a confidence rating, while email enrichment finds an address without testing it, so run those through email validation (1 credit each) before they go into a sequence. The same credits validate a phone number and scrub it against Do Not Call before a call.

Try 1Lookup free for 7 days before you decide.

The 7-day free trial includes credits for all 44 data products: $5 on Starter, $20 on Growth and above. No payment today.

Start your free trial See 1Lookup pricing

We rank six more kinds of data tools the same way.

Looking for one head-to-head instead? See the full comparison directory or the alternatives guides.