Email Signature Generator
Build the list you send to
Cleanlist AI turns a list of names or company domains into verified work emails and phone numbers.
Working a whole list? Upload the CSV to Cleanlist AI. Get 14 days of Pro, free: 250 credits, 3 seats, agents, Sequences and Clu in Slack.
Start free trialWhat a professional email signature should include, and how to add one to Gmail, Outlook and Apple Mail. Keep it to your name, title, company, phone and one or two links.
Next, build the list you send to
Cleanlist AI turns a list of names or company domains into verified work emails and phone numbers.
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 Heads of Data or Analytics, 2-5 years in the role, at Series C+ software companies with 201-1,000 people that raised in the last 12 months. US or Canada. Skip HubSpot customers. Verify their emails. Clu runs the tools, asks for confirmation before spending credits (Find work emails for 25 leads on Data leaders, Series C+, 25 credits), fills the list row by row and reports: 25 leads, 24 verified emails. One is a catch-all, so I marked it risky.
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.
Make a professional email signature
To make a professional email signature, include your name, title, company, phone, and one or two links, then paste it into the signature settings in Gmail, Outlook, or Apple Mail. Use email-client-safe inline styles if you write the HTML yourself, so the signature renders consistently.
The toolEmail Signature GeneratorRunsInside Cleanlist AIFree quotaAccount required
How does this tool work?
A clean email signature is a small thing that quietly signals you are a real professional, and it gives every reply a clear next step (your phone, your site, your LinkedIn). Keep it simple: your name, title, company, phone, email, website and LinkedIn, with one accent color at most. If you write the HTML yourself, use inline styles, since signatures that lean on stylesheets often break between email clients.
Gmail, Outlook and Apple Mail all have a signature setting where you can paste formatted text. A signature is the last touch on an email; the first touch is reaching the right person. That is what Cleanlist AI does for sales and GTM teams: find and verify prospect emails and phone numbers across 25+ providers (98% verified work emails and 85% phone numbers on our 500-lead benchmark) and enrich every contact with AI columns so outreach is personalized at scale.
Polish your signature, then build a verified contact list to send from it.
Who uses the Email Signature Generator?
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?
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.
- AI Cold Email GeneratorThree frameworks for writing a cold email: AIDA, PAS and the pattern interrupt.
- Cold Email Spam CheckerThe words and formatting that route cold email to spam, and how to fix them.
- 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.
- B2B Contact Findername + companyverified emailFind verified work emails by name and company, inside Cleanlist AI.
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.
- AI sales toolsThe AI tools for each job in the sales process, from people search and enrichment to writing and call prep, with prices.
- Best sales prospecting toolsProspecting tools ranked by how fast a rep gets from an ICP to a list they can contact.
- Sales sequencesSix complete sales sequences with day-by-day timing, the stop rules and the software that runs them.
Frequently asked questions
Short answers about the Email Signature Generator: what it checks, what it costs and where it stops.
All free toolsCan I build a signature on this page?
No. This page covers what to include, and your email client's own signature editor is enough to build a clean one. What an account gets you is Cleanlist AI finding and verifying prospect emails and phone numbers across 25+ providers. Every new workspace starts with 14 days of Pro (up to 3 seats, 250 credits).
How do I make a signature work in Gmail and Outlook?
Keep the formatting simple and use email-client-safe inline styles if you write HTML, so it renders consistently in Gmail, Outlook, and Apple Mail. Then paste the formatted version directly into your email client's signature settings.
How do I add the signature to Gmail?
Copy your signature, then in Gmail go to Settings, scroll to the Signature section, create a new signature, and paste. Save changes at the bottom of the settings page. The formatting and links carry over.
What should a professional email signature include?
Keep it to the essentials: full name, job title, company, one phone number, and one or two links (website and LinkedIn). Avoid large images, long quotes, and multiple competing calls to action, which can hurt deliverability and look cluttered. A clean, text-light signature renders reliably and reads well on mobile.
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.