If you’re building an online income stream in 2026, your email list is your most valuable asset. Social media platforms change their algorithms overnight — your list is yours forever. But with so many platforms to choose from, picking the right one as a beginner can feel paralysing.
This comparison cuts through the noise. We’re looking at three platforms that come up most often: Beehiiv, Kit (formerly ConvertKit), and Mailchimp — specifically for UK beginners building an affiliate marketing or content business.
The Short Answer
- Beehiiv → best for newsletter-first creators who want to grow fast and eventually monetise directly
- Kit → best if you’re selling digital products or courses alongside your content
- Mailchimp → best avoided if you’re just starting out (more on why below)
What Each Platform Actually Is
Beehiiv
Beehiiv launched in 2021 and was built by ex-Morning Brew employees who knew exactly what a growth-focused newsletter needed. It’s newsletter-native — everything is designed around writing, growing, and eventually monetising your subscriber base.
Key features:
- Free plan up to 2,500 subscribers (no credit card required)
- Built-in referral programme to grow your list faster
- Ad network access on paid plans (sponsors pay to appear in your newsletter)
- 0% revenue cut on paid subscriptions (on paid plans)
- Clean, readable newsletter design out of the box
- Solid analytics showing open rates, click rates, and subscriber growth
Pricing (2026):
- Free — up to 2,500 subscribers, unlimited sends
- Lite — from ~$59/month (approx. £47/month)
- Pro — from ~$109/month (approx. £86/month)
The free plan is genuinely generous. Most beginners will stay on it for their first 6–12 months.
Kit (formerly ConvertKit)
Kit rebranded from ConvertKit in 2024 and has positioned itself as the platform for creators who sell things — courses, digital downloads, coaching. It’s more of a full marketing tool than a pure newsletter platform.
Key features:
- Free plan up to 10,000 subscribers (the most generous free tier of the three)
- Landing pages and forms included free
- Automation sequences (limited on free plan — one automation only)
- Commerce features for selling digital products directly
- Integrations with tools like Teachable, Gumroad, and Stripe
Pricing (2026):
- Free — up to 10,000 subscribers, but limited to one automation
- Creator — from $25/month (approx. £20/month) for up to 1,000 subscribers
- Creator Pro — from $50/month (approx. £40/month)
The catch: Kit’s free plan removed automations recently, which means you can’t run a proper welcome sequence without paying. For affiliate marketers who rely on drip email sequences, this matters.
Mailchimp
Mailchimp is the oldest of the three and was originally built for e-commerce businesses sending promotional emails. It’s evolved a lot, but that legacy shapes how it works — and it shows.
Key features:
- Free plan up to 500 contacts (500 sends/month on free)
- Drag-and-drop email builder
- Basic automation
- E-commerce integrations
Pricing (2026):
- Free — 500 contacts, 500 sends/month (very limited)
- Essentials — from $13/month
- Standard — from $20/month
The honest assessment: Mailchimp’s free plan is the most restrictive of the three, the interface is cluttered compared to Beehiiv, and it wasn’t designed for creator-style newsletters. Unless you’re already embedded in the Mailchimp ecosystem, there’s little reason to start here in 2026.
Head-to-Head Comparison
| Feature | Beehiiv | Kit | Mailchimp |
|---|---|---|---|
| Free subscribers | 2,500 | 10,000 | 500 |
| Free automations | ✅ Yes | ❌ One only | ⚠️ Basic |
| Newsletter-first design | ✅ Yes | ⚠️ Partial | ❌ No |
| Built-in referral growth | ✅ Yes | ❌ No | ❌ No |
| Sell digital products | ⚠️ Paid plans | ✅ Yes | ⚠️ Limited |
| Ad monetisation | ✅ Yes | ❌ No | ❌ No |
| UK pricing (approx.) | Free → £47/mo | Free → £20/mo | Free → £10/mo |
| Best for | Newsletter growth | Product sellers | E-commerce teams |
Which Is Right for UK Affiliate Marketers?
If you’re building an affiliate marketing business in the UK — like the model we cover here at Incomekit — the answer is almost always Beehiiv, for three reasons:
1. The referral growth tool is a genuine differentiator. Beehiiv lets your existing subscribers refer friends in exchange for rewards. This is organic list growth you don’t have to pay for. No other platform at this price point does this as well.
2. The newsletter format suits affiliate content. Affiliate marketing works through trust. A regular newsletter — with genuinely useful content and occasional recommendations — builds that trust over time. Beehiiv’s clean reading experience supports that. Mailchimp’s template-heavy approach looks like a marketing email. There’s a difference.
3. The free plan is actually usable. 2,500 subscribers with unlimited sends and basic automations means you can build a real business before spending a penny. Kit’s 10,000 subscriber limit looks better on paper, but without automation sequences on the free plan, you lose one of the key tools that make email lists valuable.
The one scenario where Kit wins: if you’re planning to sell your own digital products (courses, ebooks, coaching) as a core revenue stream alongside affiliate income, Kit’s commerce features are stronger. You can do both on Beehiiv, but Kit is built for it.
A Note on UK-Specific Considerations
All three platforms are priced in USD. At current exchange rates (October 2026), that adds roughly 20–25% to any advertised price when you’re paying in GBP. Factor this into your planning — the “free tier as long as possible” strategy makes even more sense when upgrading means a meaningful monthly commitment in pounds.
Also worth noting: UK GDPR requires clear consent for marketing emails. All three platforms include double opt-in options (where subscribers confirm their address before joining your list). We’d recommend enabling this — it keeps your list clean and you legally protected.
Getting Started With Beehiiv
If you’re ready to start building your list, Beehiiv’s free plan is the lowest-risk entry point. No credit card needed, no artificial time limits.
👉 Start your free Beehiiv newsletter here — this is our affiliate link, which means we earn a small commission if you sign up (at no extra cost to you). We only recommend tools we actually use.
Once you’ve set up your Beehiiv account, the next step is building a lead magnet — a free resource people actually want in exchange for their email address. We cover exactly how to do that in our free UK Affiliate Starter Kit.
Bottom Line
For UK beginners starting from scratch in 2026:
- Start with Beehiiv if your goal is growing a newsletter audience and monetising through affiliate recommendations
- Consider Kit if selling your own digital products is a core part of your plan
- Skip Mailchimp unless you have a specific reason (existing account, e-commerce integration, team workflow)
The best platform is the one you’ll actually use consistently. Pick one, commit to it, and focus your energy on writing useful content — that matters far more than which tool you chose.