How does the connection authenticate?

With your lemlist API key, found in your lemlist account settings. Paste it once and Cleanlist handles the rest.

Does it avoid duplicate leads?

Yes. Cleanlist deduplicates against the leads already in your campaign before pushing, so contacts aren't added twice.

Are emails verified before they're sent?

Yes. Every lead is verified during enrichment, so invalid and risky addresses are filtered out before they reach a campaign.

How accurate are the emails pushed to lemlist?

Cleanlist verifies every address through a 25+ provider waterfall before it reaches a campaign, working to a 98% verified work email spec with syntax, DNS/MX, and SMTP checks on each one, so your lemlist campaigns run on deliverable data.

Push enriched leads straight into lemlist campaigns.

Cleanlist verifies and enriches your leads, then pushes them straight into the lemlist campaign you choose, deduplicated and ready to send. Its 25+ provider waterfall verifies 98% of work emails before anything reaches a campaign, and catch-all or risky addresses are flagged rather than sent, so you protect sender reputation instead of burning it on bounces. Connect with your lemlist API key in seconds.

Start free trial Book a demo

API keyOne key from your Lemlist settings, pasted once. There is nothing to install.

One-way outCleanlist writes into Lemlist and reads nothing back.

6 fieldsWritten into Lemlist, mapped one to one, and listed in full below.

Every field Cleanlist writes into Lemlist

Cleanlist writes into Lemlist. It does not read your Lemlist activity back, and it does not send email. The sending stays entirely inside Lemlist.

CleanlistLemlistOne-way out

Cleanlist field	Lemlist object	Lemlist field
Verified work email	Lead	email
First & last name	Lead	firstName, lastName
Job title	Lead	jobTitle variablecustom
Company & domain	Lead	companyName, plus a domain variablecustom
LinkedIn URL	Lead	linkedinUrl
Custom variables	Lead	Any {{variable}} your campaign usescustom

Objects Leads, Campaigns

custom A field you create once in Lemlist and pick during mapping. Everything else is stock.

Overwrite Empty fields only by default. Overwrite, append or skip is set per field.

What you can do with Cleanlist and Lemlist

Verified contact data, enriched across 25+ sources, flowing into the tool your team already lives in.

Push to any campaign
Send enriched, verified leads from Cleanlist directly into the lemlist campaign of your choice.
Protect deliverability
Verify every address before it's pushed, so your lemlist campaigns don't burn sender reputation on bounces.
Dedupe automatically
Cleanlist checks against existing leads so the same person doesn't land in a campaign twice.

What reaches Lemlist has already been verified.

Each record walks a 25+ provider waterfall in cost order. Addresses are checked at the syntax, domain and mailbox level before anything is written, and catch-all or risky results are flagged rather than passed through quietly.

98%Verified work email on a 500-lead stratified benchmark.

85%Direct dial on that same 500-lead test.

25+Providers queried in cost order on a single lookup.

0 creditsSearch is free and unlimited. An email is 1, a direct dial 10, both 11, validation 0.5. A miss costs nothing.

How it works

Paste one key, choose the destination, and the results land in the fields above.

01
Add your lemlist API key
Paste your key from lemlist settings to connect in seconds.
02
Pick a campaign
Choose the destination campaign and map the fields lemlist expects.
03
Enrich and push
Cleanlist verifies, enriches, and pushes your leads into lemlist, skipping anyone already there.

Lemlist integration FAQ

How does the connection authenticate?
With your lemlist API key, found in your lemlist account settings. Paste it once and Cleanlist handles the rest.
Does it avoid duplicate leads?
Yes. Cleanlist deduplicates against the leads already in your campaign before pushing, so contacts aren't added twice.
Are emails verified before they're sent?
Yes. Every lead is verified during enrichment, so invalid and risky addresses are filtered out before they reach a campaign.
How accurate are the emails pushed to lemlist?
Cleanlist verifies every address through a 25+ provider waterfall before it reaches a campaign, working to a 98% verified work email spec with syntax, DNS/MX, and SMTP checks on each one, so your lemlist campaigns run on deliverable data.