Most cold email tools don't ask if you're allowed to send.
This one does.
Grezzio checks each recipient's market against EU and UK email-marketing law before your campaign goes out — and tells you when to stop, not just how to send faster.
Cold email tools are built to send.
Not one of them is built to ask if they should.
Instantly, Lemlist, Apollo and the rest will send to an opt‑in market like Germany or Poland exactly the same way they send to an opt‑out market like the UK. The tool can't tell the difference — so it doesn't try. Whether that campaign is legal is left entirely to you, quietly, at 2am, mid-import.
The Netherlands is opt-in. Even though it's a home market for most of our early users, Dutch law treats B2B cold email almost the same as B2C.
Germany carries real risk. Competitors — not just regulators — can send a costly warning letter (Abmahnung) over a single unsolicited email.
Poland closed its loophole. A 2024 law update removed the soft opt-in exception that used to give some cover.
One list, two outcomes.
Same product, same click — different market, different answer. Grezzio doesn't just log the rule, it changes what you're allowed to do next.
Opt-out. No consent needed for business addresses. The campaign can start immediately.
Opt-in market under PKE art. 398. Grezzio stops and asks you to confirm before anything sends.
Three steps. The third one is the one nobody else has.
Bring your own list
Drop in a CSV. Grezzio recognises company, contact, city, industry and site columns, and classifies every address as role-based (info@) or named (jan@) — that distinction matters later.
One email, written your way
Write the message the way you'd send it by hand. AI adapts it per recipient — same length, same tone, no invented facts — using your own model API key.
The market decides the pace
Green markets send. Amber markets narrow automatically to what the law allows. Red markets stop and wait for your explicit confirmation — nothing goes out by accident.
Everything a real campaign needs. Nothing that puts your data anywhere else.
Multiple inboxes, one campaign
Rotate sends across accounts automatically, or pin a whole list to a single inbox.
Natural send pacing
Randomised intervals and working-hours scheduling, so a campaign doesn't look or behave like a bot.
Unsubscribe, handled
A working mailto unsubscribe link and a monitored inbox — confirmations go out automatically, translated into the recipient's language.
Nothing leaves your machine
Grezzio runs locally. Recipient data goes to your own SMTP/IMAP provider and, if you choose, your own AI provider — never to us.
Your own AI key
Bring your own API key. No per-email fee, no usage cap set by us, no subscription.
Encrypted locally
Passwords and API keys are encrypted with Windows' own credential mechanism (DPAPI) before they touch disk.
Know before you send.
Every market Grezzio ships with today, and the rule behind the status. Source: Fieldfisher, "Email Marketing Across Europe," B2B column.
Pay once. Own it.
No seats, no monthly fee, no per-email charge from us.
- Full version, all 24 markets, free updates within this version line
- Runs locally on Windows — your data stays on your machine
- Bring your own AI API key — no ongoing cost to us
- Unlimited campaigns, unlimited accounts, unlimited lists
Before you buy
No. Grezzio surfaces publicly available email-marketing rules to help you decide — it isn't a substitute for a lawyer, especially before a large or high-risk campaign.
No tool can guarantee that. Grezzio's job is to make sure you're never guessing — it warns and informs, it doesn't promise legal safety.
None of your contact data goes to us. Grezzio talks directly to your own email provider over SMTP/IMAP, and — only if you add a key — to the AI provider you choose.
No subscription. You bring your own AI API key, so you pay that provider directly at their normal rates — we never see or mark up that cost.
Windows, as a local desktop application. It opens in your browser but nothing is hosted — the server runs on your own machine.
Send where you're allowed. Know before you don't.
€99, once. No subscription, no seat fees, no per-email charge.
Buy Grezzio — €99