
Email Marketing
10 Ways to Grow Your Email List Beyond the Popup

By
Isabella Silva
10 advanced ways to grow your Klaviyo email list with high-intent subscribers using Instagram, paid ads, and conversion-led strategies.
A popup is a starting point, not a strategy.
The brands building strong, consistent email revenue aren't just collecting subscribers. They're creating deliberate entry points across every touchpoint, each one designed to attract the right person at the right moment.
Here's how to think about list growth more intentionally.
1. Instagram DM Capture → Klaviyo Sync
Most brands use DMs for customer service. The smarter move is treating them as acquisition.
Trigger DMs through comments or story replies, capture emails inside the conversation, and sync directly into Klaviyo. It works because it removes friction. You're meeting people where they already are, not redirecting them somewhere else.
This approach suits brands with an active organic presence. If your content is already driving comments and story engagement, you have an untapped acquisition channel sitting idle.
2. Waitlists and Early Access
Rather than opening to everyone at once, build anticipation first. Gate early access behind an email signup, then release in stages.
The result: stronger list growth, higher conversion rates, and a clean segment of high-intent subscribers before launch day even arrives.
Most effective ahead of new product launches, seasonal drops, or any campaign where demand can be shaped before it's met. It gives you a warm list ready to convert at exactly the right moment.
3. Lead Magnets Built Around Purchase Intent
Generic lead magnets — 10% off, newsletter signups — rarely perform because they attract the wrong people.
Better options: buying guides, product selection quizzes, exclusive drops or bundles. The distinction matters. Align the incentive with what someone would want before they buy, not just after.
Worth revisiting if your list is growing but conversion rates from welcome flows are underwhelming. Often the problem isn't the flow — it's the quality of who entered it.
4. Product-Level Entry Points
Let the product do the work.
Back-in-stock notifications, colour waitlists, bundle unlocks. These are small prompts that carry significant intent signals. A subscriber who raised their hand for a specific product is a fundamentally different subscriber to one who clicked a banner.
Prioritise this for products with a history of selling out, or new SKUs where early demand data would be valuable. The list you build here is easier to convert and more informative for planning.
5. Paid Campaigns Built for List Growth
Most brands run paid ads to drive direct sales. Fewer use them to grow the list first.
Driving traffic to lead capture pages, promoting early access, or building audiences ahead of major campaigns creates a more valuable pool to convert when it matters. Especially for higher-volume periods.
This is particularly relevant in the lead-up to Q4 or major sale events. Building the list in September means you're not relying solely on cold audiences when competition and CPMs peak.
6. Embedded Forms on High-Intent Pages
A popup only captures people it catches at the right moment. Embedded forms catch the ones who move past it.
Add them to collection pages, editorial content, product pages, and subtly, the cart. These placements reach users who are already browsing with intent, which matters for list quality.
If your site has strong organic traffic or a blog that drives consistent visits, embedded forms are low-effort, high-return. They work quietly in the background without disrupting the browsing experience.
7. Multi-Step Forms
Asking for everything upfront is the fastest way to lose the conversion.
Instead: capture the email, then ask for mobile, then reveal the incentive. Each micro-commitment increases the likelihood of the next. Inside Klaviyo, this also unlocks stronger lifecycle flows from the start.
Useful for brands looking to build both email and SMS lists simultaneously. Rather than running separate capture mechanisms, one well-structured form does both — without overwhelming the person filling it in.
8. Post-Purchase and Packaging
Your existing customers are your easiest acquisition opportunity.
Post-purchase pages, QR codes in packaging, and loyalty programs all create natural moments to deepen the relationship. Turning a one-time buyer into a long-term subscriber without any additional media spend.
Often overlooked because the sale is already done, but this is where retention starts. A subscriber acquired post-purchase already trusts the brand, which means they're more likely to open, click, and buy again.
9. Content That Converts
If you're investing in content, it should do more than drive awareness.
Blog articles with embedded opt-ins, guides promoted through paid or organic, education-led landing pages. These work particularly well for higher-consideration products or brands with a clear point of view. The content earns the email.
Best suited to brands where the purchase decision takes time — skincare, supplements, homewares, anything where customers research before they commit. Content builds trust at the top, and the opt-in captures them before they leave.
10. Incentives Tailored by Segment
Not every subscriber should receive the same offer.
Klaviyo allows you to adjust incentives based on behaviour, traffic source, location, or product interest. A new visitor and a returning high-value browser require different approaches. A discount for one. A value-add or exclusive access for the other. More relevance means better quality at the point of capture.
A worthwhile focus for brands that have been running the same welcome offer for more than 12 months. Over time, a blanket discount trains the wrong buying behaviour. Segmented incentives give you more control over who you attract and how they enter the list.
The Bigger Picture
List growth is a system, not a tactic.
The strongest email programmes build multiple entry points, align list growth with broader campaign timing, and stay focused on intent over volume. A smaller, genuinely engaged list will consistently outperform a larger, passive one — on revenue, on deliverability, and on long-term brand value.
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