Recruiters and business-development people at US IT staffing and consulting firms who source on LinkedIn and need a work email or a checked phone number for the person on screen.

From addresses already verified in our engine, the company's naming pattern, mail-server and data-provider checks, published sources on the company's site, and a data provider when those come up empty. Whichever step answers, the result is labelled the same way.

The company's mail goes through a security gateway or accepts every address, so nobody — not us, not any vendor — can confirm the mailbox. The address follows the naming pattern used by most of the company's real addresses, and the label shows how many: "LIKELY · 92%" means 92% of the real addresses we have seen there use that pattern. It costs one credit and is refunded if it hard-bounces.

The address is in the company's usual format, but our data provider's verifier reports that the mailbox does not exist — it may be an old address, a mailbox not yet created, or the person may have left. It is shown so you can decide, with a warning that it is likely to bounce, and costs half a credit. A hard bounce refunds it.

Your dashboard's Bounces tab gives you a personal tracking address. Add a Gmail filter or Outlook rule that forwards bounce messages to it — the tab walks you through it and has a test address that bounces on purpose, so you can see it working. When a bounce says the mailbox does not exist, you get back what the address cost, 1 or ½ credit. Blocks for spam or policy are about the message, not the address, and are not refunded.

Optional. BCC your tracking address on outreach and we note who each email went to. If 72 hours pass with no bounce it counts as delivered, and a likely or not-found address that gets through becomes verified for future lookups. We keep the recipients, subject line and time — not the message text.

A reasonable guess with less evidence behind it than a likely address — too few examples, or a pattern the company does not use consistently. Shown, labelled, and free.

Many sit behind gateways that answer "yes" to every address. Where our data provider can confirm the mailbox anyway, we mark it verified. Where nobody can, and the company names its people consistently, we mark it likely with the match rate — never "verified".

Many firms run their website on one domain and their email on another — a parent company, an acronym, an older name. Before searching, LeadProve checks where the company's people actually receive mail: where the website redirects, the addresses printed on it, the company's mail system and its copyright holder. When the answer comes from a related domain, the result says which one and why.

It checks a number you already have with the carrier — live or not, mobile or desk. Finding a number from a name alone is not offered today.

The extension is built not to be the reason: it never modifies the LinkedIn page, never runs in the background, never visits profiles for you, calls no LinkedIn API, and paces lookups (8 seconds apart, 15 per ten minutes, 40 a day by default). LinkedIn's rules are theirs and unpublished, so nobody can promise you anything — but these are the defaults that keep a tool from looking like a script.

No. It reads one profile when you click, and nothing else.

Two fields from the profile you have open — the name and the employer as displayed — plus the extension's connection key for your account, to LeadProve's server. Nothing else. See the extension privacy policy.

No. Your leads, statuses and notes are yours. What the engine shares across customers is facts about addresses — that a given address was verified or bounced — never who looked it up or why. We do not resell a database of captured leads.

Yes — CSV export from the Leads tab at any time, on every plan.

No. Sign up with your work email, confirm the address, and 90 contacts a month are yours — plus the 500-credit sign-up bonus, released 50 a month.

Every new company account that signs up with a work email gets a one-time pool of 500 credits. Each month, 50 of them are added to your balance alongside your plan's credits — so a Free account has up to 140 contacts a month for its first ten months. The pool is valid for 12 months from the day you confirm your email, and it keeps releasing if you move to a paid plan. Like all Free credits, what is not used by month-end does not carry over.

Yes. Personal addresses get the full Free plan — 90 contacts a month. The 500-credit sign-up bonus is for work addresses, once per company, because it is a welcome offer for a firm rather than for each inbox.

The Free plan is one per person. If an account is opened from a browser, device or extension that already has a LeadProve account, it is created normally but without free credits — it can still be used on a paid plan. If we got that wrong (a shared office computer, say), email us and we will fix it the same day.

Today each person creates their own login; write to us to have logins joined to one shared credit pool and we will set it up. Self-serve team invites are coming.

From the Chrome Web Store — it is free. It works in Google Chrome and other Chromium browsers such as Edge and Brave. After installing, click its icon and press Connect to LeadProve; sign in, and it is connected.

The extension in the Chrome Web Store talks to LeadProve only. Write to us if you are interested in a self-hosted arrangement.