Prospekt
Free & open source · v1.3.0

Every page you visit, read for contacts.

Prospekt pulls emails, phone numbers and social profiles out of the pages you're already browsing. No search box, no credits, no account — and nothing ever leaves your device.

No account No cloud No credits CSV export Your own regex
The Prospekt dashboard showing collected contacts by type, hit rate, richest domains and latest finds.
How it works

It reads the page. You keep what matters.

Most contact finders only work on LinkedIn, or only on pages already sitting in a vendor's database. Prospekt reads the text in front of you — so it works on a company's team page, a conference speaker list, a directory, a forum thread, or an internal tool your own company built.

Extracts as you browse

Every page you open is scanned for emails, phone numbers and profiles on LinkedIn, X, GitHub, Instagram, YouTube, Facebook and TikTok.

Knows what's new

Contacts you've already saved are marked as seen, so revisiting a site never fills your list with the same values twice.

Exports cleanly

Everything, or any filtered slice, as CSV — with the source page, section and date attached to each contact.

Your patterns

Every rule is a regex you can read and change.

Edit the email and phone patterns, add social platforms, or write your own for anything at all — crypto wallets, SKUs, ticket IDs, case numbers, VAT numbers. A live tester highlights matches as you type, so you see what a pattern catches before you save it.

Email   \b[A-Za-z0-9._%+\-]+@[A-Za-z0-9.\-]+\.[A-Za-z]{2,}\b
Ticket  TCK-\d{5}
SKU     SKU-\d{4}-[A-Z]{2}

Filter lists that actually filter

Skip whole domains, drop junk email domains, ignore role prefixes like noreply@, and strip social URLs that aren't real profiles.

Know when a pattern drifts

Each pattern reports its match count and when it last fired — so you notice a rule that's gone quiet, or one that's started catching dates instead of phone numbers.

Privacy

There is no server. There is nothing to sign up for.

Prospekt stores every contact and scan record in your browser's local storage. We never receive them, because there is nowhere for them to go. No analytics, no telemetry, no accounts, no ads.

Stays on your machine

Contacts, scan history and settings live in local extension storage. Clear all of it from Settings at any time.

Favicons off by default

Fetching remote favicons would tell each site you're looking at your saved contacts, so it's opt-in rather than on.

A skip list you control

Mail, documents and messaging apps are excluded out of the box. Add any domain you don't want read.

Because the data never leaves your device, you're the only one holding it — and the only one responsible for using it lawfully. Check the rules that apply to you before contacting anyone. Full detail in the privacy policy.

Questions

The things people ask first.

Is it really free?

Yes. No paid tier, no credit system, no trial that expires. Prospekt is open source, so you can read exactly what it does with the pages you visit.

Does it work outside LinkedIn?

That's the point of it. Prospekt reads page text, so it works anywhere text renders — company sites, directories, speaker lists, forums, job boards, internal tools. It has no notion of "supported sites".

Do you see the contacts I collect?

No. There's no account, no sync and no server to send anything to. Everything sits in your browser's local storage until you export or delete it.

Why does it need access to all websites?

Contacts turn up on arbitrary sites, so the extension can't know in advance which hosts you'll need. It only reads pages you actively open, and you can exclude any domain from the skip list in Settings.

Can I get my data out?

Any time, as CSV — the whole collection or any filtered slice, with source page and date on every row. Scan history exports separately.

Is scraping contacts legal?

Collecting publicly posted information is generally permitted, but what you then do with it is regulated in most places — GDPR, PECR, CAN-SPAM and local equivalents all apply to outreach. Prospekt doesn't send anything on your behalf; how you use what you collect is your responsibility.

Stop copying email addresses by hand.

Install it, browse as you normally would, and export when you're ready.