B2C email leads, 100% GDPR-compliant

A network of list owners across Europe

List owners are publishers who build their own email lists every day, through online consumer campaigns. Together they form the Basegrow network.

Your brand is named as co-sponsor in those campaigns. Someone who signs up sees your brand by name and actively agrees to receive your emails. Every day we collect those new opt-ins from all list owners, check them and deliver them to you.

About 80 list owners Online sign-up campaigns, with your brand as co-sponsor
Basegrow Collects, checks and filters every new opt-in
Your email platform Accepts or rejects every address
Your newsletter New subscribers, every day

Since 2012. We started Basegrow to grow TravelBird. Since then we have delivered new subscribers to travel brands such as Voyage Privé, Luxury Escapes, Journaway and Corendon, and to retailers.
The data stays with the list owners. They own their lists and remain responsible for them. We have an agreement with each of them, and we spread your daily volume over many list owners.
Strongest in new markets. We deliver in every European country except Germany. The network works best where you want to grow: a new country, or a market where your brand is still small.

From sign-up to your newsletter

Sign-up. Someone signs up in a campaign of one of our list owners and actively opts in to your brand, named as co-sponsor.
Recorded. For every opt-in we keep the date, time, IP address and source.
Checked. We remove duplicates, addresses that unsubscribed or bounced with us, and anything outside your filters, such as countries or domains.
Delivered. Every day we deliver the new addresses straight into a list in your email platform, through its API. Your platform accepts or rejects each address.
Welcomed. Our advice: no separate welcome email. Send your first newsletter after two days, and set the frequency by who opens.

Travel brands we delivered to

Examples of travel brands that received new subscribers from Basegrow.

Where Basegrow started, in 2012.

Every address comes with consent for your brand, and with proof. This is how the chain is built.

Specific opt-in. People opt in by their own action to emails from your brand, named in the campaign.
Proof for every address. Date, time, IP address and source of every opt-in, available on request.
Your legal team checks first. Before the start, your legal team receives the exact opt-in text and how your brand is named.
Only what you need. We deliver the email address, and only that.
Clear to the subscriber. In your first email you tell new subscribers where their address came from. Our privacy statement explains the rest.
No old unsubscribes or bounces. Addresses that unsubscribed or bounced with us are never delivered.
Your own block list. Addresses on the suppression list in your email platform are rejected automatically, and you never pay for them.
Limited access to your account. In Campaign Monitor we only get permission to add subscribers to one list. We can't read anything else in your account, and you can revoke our access at any time.
We stand behind every address. In our agreement, Basegrow guarantees the origin of the addresses.

You decide

Which countries.
How many addresses a day, per country and per mailbox provider.
Your filters, such as domains.
When you start. And you can stop at any time by revoking our access.

We do

Collect new opt-ins from the network, every day.
Check every address before delivery.
Deliver into your email platform, every day.
Watch bounces and complaints with you, every day.

Start small, grow together

A test batch first. We start with a small test batch, so we can check together that the connection works and the addresses arrive well.
Then grow, step by step. Volume per country and per mailbox provider, such as Gmail and Outlook, grows with your marketing team, based on bounces and complaints.
Review every month. Every month we look at the numbers together: delivered, accepted, bounces, unsubscribes, complaints, opens and clicks.

Some new subscribers start booking straight away.

EXAMPLE · DELIVERY LOG

Day	Delivered	Accepted	Rejected
Mon	2,000	1,948	52
Tue	2,500	2,437	63
Wed	3,000	2,921	79

Only accepted addresses are invoiced.

What it costs

Your email platform accepts or rejects every address we deliver. You only pay for accepted addresses; rejected addresses are free. You receive a monthly invoice with, per day, the number of addresses delivered, accepted and rejected. The price per address depends on your markets and volume; we agree it before the test.

Start with a test

Dennis · Basegrow, since 2012

Tell us in which markets you want to grow. We'll come back with a proposal for a test: countries, daily volume and start date.

Email Dennis

Questions

Is this GDPR-compliant?

Yes. Every address comes from a specific opt-in for your brand, with date, time, IP address and source on record. The list owners own their lists, and your legal team checks the opt-in text before the start.

Where do the addresses come from?

From online sign-up campaigns of about 80 list owners across Europe, where your brand is named as co-sponsor.

Which countries?

Every European country except Germany. It works best in markets where you want to grow.

How do the addresses reach us?

Every day, straight into a list in your email platform, through its API. Your platform accepts or rejects each address.

Can we see the proof of consent?

Yes. For every address we deliver, we can show the date, time, IP address and source of the opt-in.

What does it cost?

You only pay for addresses your email platform accepts. The price per address depends on your markets and volume.

How do we start?

With a small test batch. Then we grow the volume step by step, together with your marketing team.

Can we stop?

Yes. You can revoke our access to your email platform at any time. Delivery then stops immediately.

New subscribers for your brand, every day. 100% GDPR-compliant.