What is the fastest way to grow an email list?

Giveaways and pop-ups with a discount bring in sign-ups fastest, but they can attract people who only want the prize. A lead magnet tied to what you sell grows more slowly and brings in subscribers who are more likely to buy. Many businesses run both.

Do pop-ups annoy visitors?

They can if they appear the moment a page loads and offer nothing. Pop-ups that trigger on exit intent or after a visitor has read part of a page, and that offer something useful, tend to work better. Test one trigger at a time and watch both sign-ups and bounce rate.

Should I use double opt-in?

For most lists, yes. Double opt-in asks new subscribers to confirm by clicking a link, which removes typos and fake addresses and gives you a record of consent. You lose some sign-ups who never confirm, but the people who stay are more likely to open your emails.

Is it legal to add customers to my email list?

It depends on where your customers live. Many countries require separate, clear consent for marketing emails, which is why checkout tools such as Shopify's offer a marketing checkbox and let you set whether it is preselected by region. When in doubt, ask for consent rather than assuming it.

Why shouldn't I buy an email list?

The people on it never agreed to hear from you, so they complain, ignore your emails or bounce, and mailbox providers start filtering your mail. Most email platforms, including Mailchimp, ban purchased lists in their terms and can close your account for using one.

How to grow your email list: 10 methods that work

Q: Can I grow an email list for free?

Yes. Kit's free plan includes unlimited landing pages and forms for up to 10,000 subscribers, and MailerLite's free plan includes 1 landing page and 3 forms for up to 250 subscribers (checked November 4, 2026). Content upgrades, checkout opt-ins and a sign-up link in your email signature cost nothing beyond your time.

These ten methods are the ones that keep working for small businesses, creators and online shops. Most cost little or nothing, and none of them involves buying a list.

1. Send from your own domain

Before you collect a single address, set up sending from your own domain ([email protected]) rather than a free Gmail or Yahoo address. Mailbox providers check that mail claiming to come from a domain really does, using SPF, DKIM and DMARC records you add to your domain's DNS. Gmail requires all three from anyone who sends close to 5,000 messages or more a day to personal Gmail accounts, and Yahoo asks for the same. Your email platform gives you the exact records to add. Setup usually takes under an hour, and without it a growing share of your emails will land in spam or be turned away.

A dedicated page that explains what subscribers get, how often you send and what a typical issue looks like converts better than a box in the footer. It also gives you one link to share on social profiles, podcast notes and email signatures. Most email platforms include one: Kit's free plan has unlimited landing pages and forms for up to 10,000 subscribers, and MailerLite's free plan includes 1 landing page and 3 forms for up to 250 subscribers (both checked November 4, 2026).

Look at which pages get the most visits in your analytics tool, such as Google Analytics, and put a form on those first. An inline form at the end of a popular article usually does better than one on a page few people read. Keep the form short: an email address, and a first name only if you will use it.

4. Use pop-ups with a reason to join

A pop-up works when it offers something in return and appears at a sensible moment. Common triggers are exit intent (when the visitor moves to leave), time on page and scroll depth. Convertful offers all three, along with scroll boxes, floating bars, full-screen welcome mats and inline forms. Its distinguishing feature is targeting by what your email platform already knows: it can read tags and other contact data from tools such as ActiveCampaign, Klaviyo, Kit and HubSpot, so existing subscribers see a different offer from new visitors. Plans start at $9 a month for 10,000 pageviews, with a 14-day free trial (checked November 4, 2026). For other options, see our guide to pop-up builders.

5. Offer a lead magnet

A lead magnet is something useful a visitor gets in exchange for their email address: a checklist, a template, a short email course, a price list or early access to a product. The best ones solve a narrow problem your buyers have, which means the people who sign up are likely to care about what you sell. A broad freebie brings in sign-ups who unsubscribe after the download.

6. Add content upgrades to your best articles

A content upgrade is a lead magnet tied to one article: the spreadsheet that goes with a budgeting guide, or the full checklist behind a "10 steps" post. Because it matches what the reader came for, it tends to convert better than a site-wide offer. Start with your three most visited articles and add one upgrade each.

7. Run a giveaway with a prize your buyers want

Giveaways bring in sign-ups fast, and entrants make sure the email address is right because they want to hear if they won. The prize decides the quality of the list. If you sell SEO software, a free year of your own product attracts people who care about SEO; an expensive phone attracts people who want a phone. Check your local rules for running prize draws before you launch.

Spin-to-win wheels and scratch cards turn the sign-up into a small game with a prize, usually a discount. They suit online shops with frequent buyers more than B2B services. Convertful includes both formats. Watch whether the people who join this way go on to buy; a discount-led sign-up can bring in shoppers who only open emails with a code in them.

9. Ask at checkout

People expect to give their email address when they buy something, so checkout is one of the cheapest places to ask for marketing consent as well. Keep the two separate: the order confirmation is a transactional email, and marketing needs its own permission. In Shopify, you turn this on under Settings, then Checkout, in the Marketing opt-in section. You choose whether the checkbox is preselected and in which regions, and customers can always untick it. Shopify's "Regions recommended by Shopify" setting decides preselection based on each customer's local laws.

10. Give subscribers something that only subscribers get

Members-only sales, early access to new products and subscriber-only content all give people a reason to join and a reason to stay. Treat your newsletter as a product in its own right: decide what a reader gets from each issue, and say so on your sign-up page.

Growth only counts if subscribers stay and read. A few habits protect the list you build:

Use double opt-in, where new subscribers click a link to confirm. It keeps out typos and fake addresses, and gives you a record of consent.
Send a welcome email straight away, while people still remember signing up, and tell them how often you will write.
Make unsubscribing easy. Gmail expects bulk senders to support one-click unsubscribe and handle requests within 48 hours, and Yahoo asks for unsubscribes to be honored within 2 days. A clear unsubscribe link also keeps people from pressing the spam button instead.
Keep spam complaints low. Gmail wants the rate reported in its Postmaster Tools under 0.30%, and advises staying below 0.10%.
Send on a regular schedule. How often depends on what you sell, but a gap of several months makes people forget who you are.

Never buy an email list

Bought lists are full of people who never asked to hear from you, which leads to spam complaints, bounces and blocked sending. Most email platforms ban them outright. Mailchimp's acceptable use policy, for example, forbids sending to purchased, rented or third-party lists, and to publicly available data. A small list of people who chose to join is worth far more.

Which tools to use

You need two things: an email platform that hosts your forms and sends your mail, and, if you want pop-ups beyond the basic ones, an on-site form tool. For the first, start with our guide to email marketing software; Kit and MailerLite both have free plans that include forms and landing pages. For pop-ups, Convertful is a strong fit when you want offers that change with each visitor's tags in your email platform. Platformly is the one to look at if you want to know what each sign-up source earns: its forms and landing pages use double opt-in and keep consent records, and it traces each sale back to the email, link or source that brought the customer in.