Find Email Addresses by Company Domain
Enter a company domain to find the people receiving mail there with verified addresses and the pattern, no name needed.
What it does
Find Email Addresses by Company Domain, explained
You can find email addresses by domain when you only have a company website. Enter the company domain and the finder returns the people receiving mail there with verified addresses and the company's email address pattern, so you can reach a team instead of guessing one contact.
Each address comes from the same verification engine and is labelled Deliverable, Not deliverable, or Can't verify. Anonymous visitors get 10 finds per day with no account, and the same engine is available as a REST API and an MCP server to run the search across a list of domains.
5,765 checks ran through this engine in the last 30 days, from 231 different callers.
How it works
- Enter the company domain you want to search.
- Let the finder identify the email address pattern and the people receiving mail there.
- Check each verified address with its Deliverable, Not deliverable, or Can't verify label.
FAQ
Questions about the find email addresses by company domain
How do I find email addresses for a company domain?
Enter the company domain and the finder returns the email address pattern and the people receiving mail there with verified addresses. Anonymous visitors get 10 finds per day with no account.
Do I need a name to find an email by domain?
No, the domain is enough. The domain finder scans a company domain for the people receiving mail there and returns the company's email address pattern and verified addresses, while the email finder by name returns one person's address from a first name, last name and domain.
What does Can't verify mean on a domain result?
A catch-all domain accepts mail for any address, so no single address can be proven from outside. The tool labels that result Can't verify rather than marking it deliverable.
Can I run this across many domains?
Yes, the same engine is available as a REST API and an MCP server on every tier, including the free one. Anonymous visitors get 10 finds per day with no account to run the search across a list of domains.
Other ways in
Start from what you have
- Email validatorCheck one address for deliverability.
- LinkedIn email finderProfile URL in, verified address out.
- Email finder by nameFirst name, last name and domain.
- Bulk email verifierA list or a CSV, verdict on every row.
Weighing it against another vendor? See how it compares with Hunter.
// Real-time API endpoints
Explore the production API
Three ways in, one credit pool. Every response on this page is a real one from the service.
https://www.startuphub.ai/api/v1/email/validateCheck that an address will take mail
One address in, a verdict out: deliverable, not deliverable, or unknown, with a confidence score.
- 1 credit per definitive result
- Unknown and catch-all answers are free
- Bearer key, JSON in and out
- Up to 100 at a time in the tool above
curl -X POST https://www.startuphub.ai/api/v1/email/validate \
-H "Authorization: Bearer sk_live_..." \
-H "Content-Type: application/json" \
-d '{"email":"[email protected]"}'1{2 "email": "[email protected]",3 "valid": true,4 "status": "deliverable",5 "confidence_score": 956}
The response also carries a credits object with your remaining balance.
Full reference, rate limits and SDKs on /api-docs.
Capabilities
Built for real use, not a demo
Live verification
Every lookup is performed when you ask. There is no database of addresses to go stale, and every verdict is labelled so you know how much to trust it.
Pay only for answers
A credit is spent on a definitive verdict. Unknown and catch-all results cost nothing, and a discovery is charged only when an address is found.
Ceilings you can plan around
Every plan has a daily and a monthly allowance for verifications and discoveries. Credit packs sit outside both, so a batch never waits for midnight.
Checked when you ask
No pre-built list and no cached verdicts. Each address is checked at the moment of the request, so the answer reflects the mailbox today.
Purchased credits never expire
Plan credits reset with the billing period. Credits you buy on top stay on the account until used, and work across REST, MCP and the tool on this page.
API, MCP and the tool, one pool
Paste up to 100 addresses here or upload a CSV, call the REST endpoints with a Bearer key, or ask from Claude, Cursor or Codex over MCP. Same credits, same results.
// Pricing
Simple, transparent pricing
One credit per verification, ten per discovery, charged only on a definitive answer. Plan credits renew each period; credits you buy on top never expire.
Prices in USD, VAT added at checkout where it applies. Need more in a month? Credit packs start at $5 for 500 credits on /credits/buy and sit outside every ceiling.
Get started
Stop sending mail to the void.
Free tier covers 10 validations and 10 finds a day, no account needed.
Other tools
- Email ValidatorCheck whether an address is deliverable before you send to it. Use it on a list, a single guess, or an address an agent just found.
- Email FinderFind a work email from a name and a company domain. Use it when you know who you want and not their inbox.
- LinkedIn Email FinderPaste a LinkedIn profile URL and get the verified work email. Use it when the profile is all you have.