B2B Contact Finder
name + domainlikely address + pattern
Find business contacts by company domain. Get predicted email formats, company intelligence, and enrichment previews, free.
Find the verified email for every name
The finder predicts the pattern. Cleanlist AI finds the address itself and verifies it, at 1 credit per verified email.
The Free plan is $0 with 50 credits a month and 5 searches. Every new workspace can also try Pro free for 14 days.
- Search
- Free
- Verified work email
- 1 credit
- Phone number
- 10 credits
98% verified work emails and 85% phone numbers on our 500-lead benchmark, across 25+ providers.
A demo of Clu, the Cleanlist AI agent, doing this for a whole list. Asked: Find the verified work email for everyone in Series B sales leaders Clu runs the tools, asks for confirmation before spending credits (Find work emails for 212 leads on Series B sales leaders, 212 credits), fills the list row by row and reports: 197 verified emails on the list, 15 not found. Want phone numbers for the 197 next?
10,000+ users, from founders to full sales teams
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The Cleanlist AI Chrome extension finds the verified email and phone number for the LinkedIn profile you have open, in the same tab.
Find business contacts by domain
A contact finder locates business contacts at a target company from its domain. Enter any company domain and this free tool returns the email formats that organization most likely uses, plus a preview of available company data, no signup required. Format prediction is a starting point, not proof an address exists. For verified emails at 98% accuracy, every new Cleanlist AI workspace starts with 14 days of Pro (up to 3 seats, 250 credits, no card).
The toolB2B Contact FinderRunsRuns in your browserFree quotaUnlimitedTakesname + domainReturnslikely address + pattern
How does this tool work?
The B2B Contact Finder helps sales and marketing professionals identify potential business contacts at target companies. Enter a company domain to instantly see the most common email format patterns used at that organization, along with a preview of the company intelligence data available through Cleanlist AI's enrichment platform.
Unlike basic email guessers, the Contact Finder combines domain analysis with pattern recognition across thousands of B2B companies to predict the most likely email formats. It also previews the firmographic and organizational data that Cleanlist AI can enrich, including company size, industry, headcount band, verified work emails, and direct phone numbers.
This free tool gives you a starting point. For verified, deliverable email addresses and phone numbers confirmed through real-time SMTP checks and multi-provider waterfall enrichment, start a Cleanlist AI workspace, which starts with 14 days of Pro (up to 3 seats, 250 credits, no card). Every contact returned by Cleanlist AI is verified against real mailboxes, not just predicted from patterns.
Who uses the B2B Contact Finder?
The people who run it most, and what each one runs it for.
- Sales teamsCatch a dead address before a rep spends time writing to it.
- MarketersClean a list before the campaign goes out, so bounces don't hit the sending domain.
- RecruitersConfirm a candidate's contact details are real before you reach out.
- FoundersCheck an address before you email an investor, partner or buyer.
- RevOpsKeep CRM records accurate so routing, scoring and reports hold up.
- AgenciesCheck client data before it goes into a live campaign.
What does Cleanlist AI do with a whole list?
This free tool checks one record at a time. Watch a real search go from query to an enriched, validated, CRM-ready list: 36 leads, 100% contact fill, synced to HubSpot.
36 ICP leads, 100% contact fill, validated and pushed to HubSpot in one flow
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.
Which free email lookup tools work together?
Start from whatever you have (a name, a domain, an email or a block of text) and chain the tools until you have a verified contact.
- Reverse Email Lookupemailperson, company, profileStart with an email address and find the name, company, and public profile behind it.
- Email Format Finderdomainranked address patternsSee the email pattern a company uses (first.last@, flast@) from just its domain.
- Email Permutatorname + domainevery likely addressGenerate every likely address for a person from their name and company domain.
- LinkedIn Email Finderprofile URLlikely work emailGet the likely work email behind a LinkedIn profile, ranked and MX-checked.
- Email Verifieremailverdict + scoreCheck whether any address is deliverable before you send, with syntax, DNS, and MX checks.
- Email ExtractorURL or textevery email on itEnter a website URL or paste text and pull out every email address on it, deduped.
- AI Cold Email Generatorrecipient + youdraft variantsDraft the cold email to send once you have the contact.
- Best B2B People Search Tools 2026Compare the top people search platforms for building contact lists at scale.
Which paid tool does this for a whole database?
We compared the platforms that do this job for a whole database, Cleanlist AI included, and say where each one falls short.
- Claude for sales: prospecting in ClaudeHow sales teams search for people, get verified emails and direct dials, and push lists to the CRM from inside Claude.
- Best Apollo alternativesWhat teams switch to when Apollo's credits, seat pricing or phone coverage stop fitting, with current prices.
- Best B2B contact database softwareContact databases compared on accuracy, refresh rate and price once your team uses them every day.
- B2B list buildingThe six steps from an ICP to a verified prospect list, what a list costs to build, and the tools that do it.
Frequently asked questions
Short answers about the B2B Contact Finder: what it checks, what it costs and where it stops.
All free toolsHow does the B2B contact finder work?
The contact finder analyzes a company's domain to predict the most common email format patterns (like firstname@company.com or firstname.lastname@company.com). It uses pattern recognition across thousands of B2B organizations to estimate which formats are most likely. For verified, deliverable email addresses, use Cleanlist AI's full enrichment platform.
Is this contact finder really free?
Yes, the contact pattern finder is completely free with no signup required. It shows predicted email formats and company intelligence previews. For verified email addresses and phone numbers (confirmed via SMTP checks), every new Cleanlist AI workspace starts with 14 days of Pro (up to 3 seats, 250 credits, no card).
How accurate are the predicted email formats?
Email format predictions are based on common B2B patterns and are typically accurate for 60-80% of companies. However, predictions alone cannot confirm whether a specific email address exists or is deliverable. Cleanlist AI's full verification checks each address against real mail servers for 98% accuracy.
What is the difference between this tool and Cleanlist AI's full platform?
This free tool predicts email patterns based on domain analysis. Cleanlist AI's platform goes much further: it verifies each email address via SMTP handshake, finds phone numbers, enriches contacts with 40+ data points (job title, company size, funding), and runs waterfall enrichment across 25+ data providers for maximum coverage.
Can I find phone numbers with the contact finder?
The free contact finder shows email format predictions only. For verified office and mobile phone numbers, start a Cleanlist AI workspace, which starts with 14 days of Pro (up to 3 seats, 250 credits, no card). Cleanlist AI's waterfall enrichment found a phone number for 85% of contacts on our 500-lead benchmark, significantly higher than single-source providers.
How is a single-source email finder different from a waterfall?
A single-source finder queries one dataset and returns whatever that dataset holds, so a miss is final. Cleanlist AI runs waterfall enrichment instead: each contact goes through 25+ providers in sequence until one returns a deliverable result, and the result is verified before delivery. Cleanlist AI states 98% verified work emails and 85% phone numbers as product specs. This free tool shows format predictions only; the full platform delivers verified, multi-source results. Several well-known email finders are sources inside that cascade rather than alternatives to it.
Now run it on the whole list.
Upload the CSV or describe the list you want. Clu finds, verifies and qualifies every row.
14 days of Pro, free.