How to Choose the Right Email Marketing Platform

Key Takeaways

• MailerLite's free plan covers 1,000 subscribers and 12,000 monthly sends, enough runway to test whether email marketing earns a paid tool.
• One coaching client outgrew MailerLite the moment she needed to bill three membership tiers and track affiliates across regular webinar launches, the exact gap Keap closes.
• A client migrating off Ontraport kept her funnels intact by moving to Kit, cutting cost without losing the features her leaner business still needed.

Start With What You Need the Platform to Do

Before comparing features or pricing, get clear on three things: the size and stage of your list, the complexity of your sales process, and whether you're primarily running a service business, a content business, or a course and education business. The answers to those three questions will narrow the field faster than any feature comparison chart.

A service business with a 500-person list and a straightforward follow-up sequence has different needs than a course creator with 10,000 subscribers, three products at different price points, and a membership community to manage alongside all of it. The platform that serves one of those businesses well will frustrate the other. If you're still figuring out what "straightforward" actually looks like in practice, how often you should be emailing your list is usually the first thing to sort out, since it shapes which platform's sending limits and automation depth you'll actually need.

MailerLite: The Right Start for Most Businesses

MailerLite is where I point clients who are building their list from scratch or who have a list under a few thousand contacts and don't need complex automation. It's affordable, the interface is clean, and you can have a working welcome sequence and a basic opt-in page set up in an afternoon without needing any technical help.

The free plan is worth starting on. It covers up to 1,000 subscribers and 12,000 email sends per month, which is enough runway to find out whether email marketing is going to be part of how you grow before you commit to a paid platform.

Where MailerLite starts to show its limits is when your automation needs get more specific, or when you need to take payments at all. You can build sequences and set up basic triggers, but the logic available is straightforward rather than sophisticated, and there's no way to charge for anything inside the platform itself. If you need to segment contacts based on purchase history, trigger different sequences based on which product someone bought, or build a multi-branch automation that responds differently to different behaviors, you'll be looking at a migration within a year. That's what MailerLite is designed for, and knowing it up front means you can plan the move instead of scrambling for it once you've outgrown it. This is the same fork we talk through in behavior-based email campaigns: the moment you want an email to respond to what a subscriber actually did, you're past what MailerLite's logic can handle.

Best for: Early-stage businesses, small lists, tight budgets, straightforward sending needs.

Kit: Built for Content-Led Businesses

Kit (formerly ConvertKit) has found a strong following among bloggers, podcasters, newsletter writers, and online educators who built their audience through content and want their email platform to reflect that model. The visual automation builder is one of the clearest in this price range, and the tagging and segmentation system is flexible enough to handle a growing list without feeling like you're constantly fighting the platform.

What sets Kit apart from MailerLite is the depth of the automation logic and the way it handles subscribers who are in multiple sequences at once. If someone buys a product, downloads a lead magnet, and is also in a nurture sequence, Kit manages those overlapping states more cleanly than MailerLite does, closer to the layered approach we build out in email nurture campaigns for clients who need a subscriber moving through more than one track at once. It also has a growing commerce feature set that lets you sell digital products directly through the platform, which appeals to creators who want to keep their stack tight.

Kit also earns its place when a business is scaling down rather than up. One client migrated from Ontraport after realizing she was paying for a long list of features she'd stopped using, and her business itself had gotten smaller and simpler. She still needed working funnels, just not the full weight of what Ontraport charged for. Kit's team handled the migration, it moved fast, and she kept the funnel logic that mattered without carrying over the cost or the tools that no longer fit.

Where Kit falls short is on the CRM side. It's an email marketing platform with tagging, not a full customer relationship management system. If your sales process involves multiple touch points, pipeline management, or tracking where a lead is in a complex journey, you'll hit the ceiling of what Kit can do and find yourself managing the rest manually or in a separate tool.

Where Kit fits: Creators, bloggers, course builders, newsletter writers, content-led businesses with growing lists, and businesses downsizing from a heavier platform.

Keap: For Businesses That Have Outgrown Everything Else

Keap is the most powerful of the four platforms and the most complex. It combines CRM, email marketing, e-commerce, pipeline management, invoicing, and automation in one system, and it does all of those things at a depth the other platforms on this list don't come close to.

One client I moved from MailerLite to Keap runs a coaching business built around mindset and life-design work, helping people reshape where their life is headed. She had three membership tiers and a steady calendar of webinar launches, and MailerLite simply doesn't do payments or subscriptions. That's the gap only Keap closes among these four. Once she needed to charge across three tiers while running launches on a regular cadence, checkout, subscription billing, and affiliate tracking all needed to live in the same system as the email sequences driving people toward each webinar. That kind of behavior-triggered follow-up is exactly what we cover in creating a high-converting follow-up sequence, and it's usually the piece that finally pushes a client from Kit or MailerLite onto Keap. Keap handles all of that in one place, and when it's set up properly it runs without much intervention.

The catch is that "set up properly" is doing a lot of work in that sentence. Keap has a learning curve that's steeper than the other platforms on this list, and the number of clients I've met who signed up, poked around for a few weeks, and then stopped using it is significant. The platform rewards investment: learning it, setting up the foundation correctly, and ideally working with someone who knows it well enough to build in it confidently. That's not a sales pitch, it's just the reality of a tool with this much capability.

Who this suits: Established service businesses, complex sales processes, businesses that need CRM and email marketing in one place, clients who are ready to invest in getting the setup right.

Kajabi: The All-in-One for Course Creators and Coaches

Kajabi sits in a different category from the other three, and it's worth being clear about that up front. It's an all-in-one business platform for coaches and course creators, with email marketing bundled in alongside a website builder, course hosting, community features, checkout pages, and a podcast hosting tool.

The appeal is obvious. One login, one support team, one monthly bill instead of four, and everything connected out of the box. For a coach building a full education business who wants to keep the operational overhead low, Kajabi delivers on that promise. The email marketing functionality is solid enough for most use cases, and the fact that it talks natively to your courses, your checkout, and your community means you're not building integrations between tools that weren't designed to work together.

Where Kajabi makes less sense is when you only need part of what it offers. If you have a WordPress site you love, an existing course platform you've invested in, and you just need better email marketing, Kajabi is a more expensive and more complicated answer to a simpler problem. The monthly cost is higher than any of the other three platforms, and you're paying for features you may not use.

Best for: Coaches and course creators building a full education business who want one platform to run it all.

The Migration Question

If you're already on a platform and wondering whether to move, the short answer is this: migrate when your current platform can't do what your business needs anymore, not because a newer tool looks appealing or a colleague is excited about something different.

Migrations take time, carry risk, and almost always surface something unexpected. A list moved without a clean tag structure loses segmentation data that took years to build. Sequences rebuilt in a hurry miss the logic that made them work, and a rushed migration is one of the fastest ways to end up back in why your emails are going to spam territory, since sender reputation doesn't move with you automatically. The disruption is worth it when the current platform is holding you back. It's not worth it when the current platform is fine and you're just bored of it.

If you're not sure whether you've outgrown your current setup, that's exactly what the free Power Up Call is for. We look at what you have, what you're trying to do, and whether a migration makes sense before you commit to one.

If you want help deciding what CRM is best for you, a Power Up Strategy Call is the place to start. Book your free call here.