Find Email Addresses for Any Professional
Find Email Addresses for Any Professional: upload a CSV or connect your CRM, and Cleanlist AI checks each row against 25+ providers in sequence. Every new workspace opens on Pro for 14 days with 250 credits, 3 seats.
Cleanlist AI People Search. The sentence "Heads of Partnerships with ecosystem in their headline, ex-HubSpot or Salesforce, at Series A-B software companies with 51-500 employees funded this year, in the US or UK. Not in any of my lists yet." becomes 9 filters (Job title: Head of Partnerships, Past companies: HubSpot, Salesforce, Headline contains: Ecosystem, Industry: Software Development, Company headcount: 51-200, 201-500, Funding stage: Series A, Series B, Most recent funding after: Jan 2026, Country / region: United States, United Kingdom, Exclude people already in my Cleanlist: In any of my lists), previews about 140 people and adds them to the list Partnership leads, US and UK.
10,000+ users, from founders to full sales teams
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How does Cleanlist AI find email addresses for any professional?
Cleanlist AI's email finder takes a name and company (or just a company domain) and returns verified work email addresses in under 3 seconds. It works out the company's email pattern, builds candidate addresses and verifies each one over SMTP before returning anything. When the pattern isn't enough, Cleanlist AI asks 25+ data providers in sequence and stops at the first deliverable result.
Why this is hard to do by hand
Most B2B prospecting stalls at the same point: finding the right email address. Reps try permutations (firstname@company.com, f.lastname@company.com), search LinkedIn and guess at the company's pattern. Even when they land on an address, they can't tell if it's current without sending a message and waiting for the bounce.
Why email pattern guessing fails for 40% of B2B domains
40%of B2B domains use non-standard email patterns
Sales folklore says try firstname.lastname@company.com, then first@company.com, then firstinitial.lastname@company.com. Those are the three most common B2B conventions, and a large share of B2B domains use something else: first_last@ (common in enterprise), lastnamefirst@ (common in government and education), abbreviations like jsmith@, numbered accounts like john.smith2@, and country-specific variants. On top of that, 15% of domains mix patterns inside the same company: the CEO is john@company.com while the VP of Sales is jane.doe@company.com. A tool that assumes one pattern per company gets those wrong. Cleanlist AI verifies each mailbox on its own.
Source: Cleanlist AI domain pattern analysis, 200M+ company domains, 2026
What a lookup costs
Each lookup walks 25+ providers in cost order, and you're charged once for what comes back: 1 credit for a verified work email, 10 for a phone number, 11 for both. Validation is 0.5 and AI qualification is 5. A lookup that finds nothing is free, and the whole team pays from one wallet.
- Verified work emails25 leads searched23 × 123
- Phone numbersVerified before anyone calls18 × 10180
- Qualification agentFit score with reasons25 × 5125
- 25+Providers queried in cost order on a single lookup
- 98%Verified work emails on our 500-lead benchmark
- 85%Phone numbers found on that same benchmark
- 0Credits for a lookup that finds nothing
How it works.
- 01
Enter a name and company or domain
Give the person's name and their company or domain. A LinkedIn profile URL works too, and a company domain lets you look up several people at the same organization in one go.
- 02
Find the company's email pattern
Cleanlist AI reads the known addresses at the domain to work out its convention (first.last@, flast@, first_last@ and so on).
- 03
Build and verify candidates
Cleanlist AI builds candidate addresses from the pattern and its common variants, then checks each one with an SMTP handshake. Only addresses whose mailbox exists come back.
- 04
Fall back to the provider waterfall
If the pattern doesn't produce a verified address, Cleanlist AI runs the person through 25+ data providers in sequence until one returns a deliverable email.
- 05
Confidence and alternatives
The main result carries a confidence score. If more than one address turns up (firstname@ and f.lastname@, say), you get each with its own verification status and pick the one to use.
What you get.
98% verified work emails
That's on our 500-lead benchmark. Cleanlist AI checks each email and flags catch-all and disposable addresses before you send.
25+ data providers
Cleanlist AI asks them one at a time and stops at the first deliverable result. When one provider has nothing, the next one gets its turn.
No code required
Upload a CSV or connect your CRM. If your engineers want it, the API is there from the Pro plan.
14-day Pro trial
250 credits and 3 seats on Pro for 14 days. You don't need a card or a sales call to start.
Manual process vs Cleanlist AI.
| Feature | Manual | Cleanlist AI |
|---|---|---|
| Finding one email | 10-20 minutes of research per contact | One lookup, 1 credit if a verified email comes back |
| Accuracy of found addresses | Unverified guesses | Verified over SMTP (98% verified work emails on our 500-lead benchmark) |
| Pattern detection | Trial and error with 2-3 common patterns | Pattern read from known addresses, candidates checked against the live mail server |
| Bulk lookup | A few per hour, by hand | CSV upload or API, run as one batch |
| Coverage when pattern fails | Dead end, move to next prospect | Falls back to the 25+ provider waterfall |
How accurate is Cleanlist AI's data?
Cleanlist AI returned 98% verified work emails and 85% phone numbers on our 500-lead benchmark, pulling from 25+ data providers. Each lookup stops at the first deliverable result, meaning a verified or likely-valid email.
What do I get when I sign up?
A 14-day Pro trial: 250 credits, 3 seats, and every Pro feature. After it, the Free plan gives you 50 credits a month. A verified work email costs 1 credit, a phone number 10, and a miss nothing.
What data providers does Cleanlist AI use?
Cleanlist AI runs a waterfall across 25+ B2B data providers. For each record it asks one, moves to the next when that one has no match, and stops at the first deliverable result.
Can I connect my CRM?
Yes. HubSpot and Salesforce sync both ways on the Pro and Enterprise plans, and Salesloft and Lemlist take a one-way push. You can also upload a CSV, or use the REST API from Pro.
How long does it take to find my data?
It depends on the size of the file and how far down the waterfall each row has to go. Cleanlist AI runs the whole CSV as one job, so you upload once and download or sync the results when it's done.
If the person has a common name, how do you find the right one?
The company domain narrows it down. Ask for 'John Smith at Acme Corp' and Cleanlist AI looks for John Smith at acme.com only. At a large company with several John Smiths, add a department or job title to get the right one.
Can I find personal email addresses or only work emails?
Work emails. Cleanlist AI is built for B2B prospecting and returns work addresses by default. For sole proprietors and freelancers who do business from a personal address, it may return that address if it appears in business directories.
How is this different from just guessing firstname@company.com?
A guess can fail twice: the company may use a different pattern, or the person may have left. Cleanlist AI works out the domain's pattern, then verifies the mailbox over SMTP. On our 500-lead benchmark, it returned 98% verified work emails.
Describe the job once. An agent runs it every week.
Clu turns one sentence into an agent. It searches 1B+ profiles, finds verified emails and phone numbers across 25+ providers, adds the people to your sequence and posts each run to Slack.
Weekly ICP outbound
Built by Clu from: “Every week, find 500 new people who match my ICP, get their emails and phones, and add them to Series B outbound.”
- Searched 1B+ profiles for new ICP matches500 foundPeople Search
- Ran the waterfall across 25+ providers487 emails · 412 phonesWaterfall
- Verified every email and phoneSMTP + catch-allVerification
- Added them to Series B outbound500 peopleSequences
- Posted the run to #pipelineSlackAgents
Friday 4:52 PM15 replies · 5 calls booked
Everything in the 14-day Pro trial
- Clu and agentsDescribe the job in one sentence. Clu builds the agent, runs it on a schedule or a CRM trigger and posts every run to Slack.
- People and Company SearchFind your buyers in 1B+ profiles from one sentence. Searching costs 0 credits.
- Waterfall enrichmentAsk 25+ providers in order and stop at the first verified email or phone number. 98% verified work emails and 85% phone numbers on a 500-lead benchmark.
- Email verificationRun SMTP and catch-all checks on every address before it reaches a sequence, at half a credit an email.
- ICP scoringScore every lead 0 to 100 against your ICP, with the reasons written down. The Research and Qualification skills do the digging.
- SequencesSend email from your reps' own inboxes, with call tasks. A reply stops the sequence. Sending costs 0 credits.
- CRM syncTwo-way sync with HubSpot, Salesforce and Pipedrive. Push finished lists to Outreach, Salesloft and Lemlist.
- Chrome extensionGet a verified email and phone number in one click on LinkedIn, Sales Navigator, Salesforce and HubSpot.
- MCP and APIRun the same search and waterfall from Claude or ChatGPT with 36 MCP tools, or from your own code with the REST API.
14 days of Pro, free: 250 credits, 3 seats, agents, Sequences and Clu in Slack. Then Free at 50 credits a month, or Starter at $49 and Pro at $89 a seat a month.
Hand the job to an agent.
Upload a CSV or connect HubSpot, Salesforce or Pipedrive, and run it on your own data today.
14 days of Pro, free.
Get 14 days of Pro, free.
250 credits and 3 seats. Sign up with your work email for 100 more.