Email Format Finder
name + companyverified email
Get the real address in Clu
A pattern list can't tell you what one company uses. Clu finds the person's actual email and verifies it, at 1 credit per verified email.
Working a whole list? Upload the CSV to Clu. Get 14 days of Pro, free: 250 credits, 3 seats, agents, Sequences and Clu in Slack.
Start free trialFind the email format behind any address with Clu, then get the verified email itself. It looks up the person across 25+ providers, so you stop guessing at first.last@ or flast@.
Find the real address, verified
Clu looks up the address itself and verifies it before it reaches your list, 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, our 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 Clu Chrome extension finds the verified email and phone number for the LinkedIn profile you have open, in the same tab.
Find a company's email format
To find a company's email format, look at addresses it has already published, or give Clu a name and a company and get the verified email itself. The most common B2B convention is first.last@, but a pattern is never proof an address exists, so verify the mailbox before sending.
The toolEmail Format FinderRunsInside CluFree quotaAccount requiredTakesname + companyReturnsverified email
How does this tool work?
Every company follows a pattern for employee email addresses, but a list of common patterns can't tell you which one a specific company uses, and a pattern is never proof an address exists. Every wrong guess counts as a bounce against your sending domain. Clu skips the guessing: give it a name and a company and it looks the person up across 25+ providers, verifies the email, and returns the address itself at 1 credit per verified email.
Who uses the Email Format 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 Clu do with a whole list?
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.
Agents that run this job
- Fill missing emailsEvery night, looks up a work email for each CRM contact that has none and writes it to the record.
- Enrich new CRM contactsFinds the missing email and phone number on new Salesforce or HubSpot contacts and writes them to the record.
- Champions who changed jobsWatches the champions in your CRM and, when one starts at a new company, finds their new work email and tells their old owner.
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, locationStart with an email address and get the name, company and job title behind it. 2 free lookups per IP every 30 days.
- Email PermutatorWhy guessing address formats backfires, and how to get the one verified email instead.
- B2B Contact Findername + companyverified emailFind verified work emails by name and company, inside Clu.
- LinkedIn Email Finderprofile URLemail, title, companyPaste a LinkedIn profile URL to get the email, name, company and title. 2 free lookups per IP every 30 days.
- Email Verifieremailmailbox statusCheck whether a mailbox is real before you send, with SMTP and catch-all detection. 2 free checks per IP every 30 days.
- Email ExtractorURL or textevery email on itEnter a website URL or paste text and pull out every email address on it, deduped.
Which paid tool does this for a whole database?
We compared the platforms that do this job for a whole database, Clu included, and say where each one falls short.
- Best data enrichment toolsThe enrichment platforms side by side: coverage, credit costs and what each one verifies.
- Waterfall enrichment toolsHow waterfall enrichment runs a record through several providers in turn, and which tools do it for you.
- Best B2B contact database softwareContact databases compared on accuracy, refresh rate and price once your team uses them every day.
- Email appendHow email appending services recover the missing work email on a record you already hold, and what a match costs.
Frequently asked questions
Short answers about the Email Format Finder: what it checks, what it costs and where it stops.
All free toolsHow do I find a company's email format?
The most common B2B convention is first.last@, followed by flast@ and first@, but a general ranking can't tell you which one a specific company uses. Published addresses on the company's site, press releases and support pages are the free way to see it for yourself. Clu goes straight to the address: give it a name and a company and it returns the verified email.
Why does this tool need an account?
Because a real answer takes a lookup, and a pattern list doesn't do one. Clu checks each person across 25+ providers and verifies the address before you get it, at 1 credit per verified email. A new workspace starts with 14 days of Pro, free.
Can I use this to find a specific person's email?
Yes. For verified individual emails, confirmed via SMTP handshake and cross-referenced across 25+ providers, Clu's People Search returned 98% verified work emails on our 500-lead benchmark.
Is a correctly formatted address safe to send to?
No. A correctly formatted address can still bounce if the person has left the company or never had that mailbox. Format is not deliverability, so verify the mailbox before you send.
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.