The "best email tool" question is one of the most common I get. The honest answer is: it depends on what you're doing. But the decision isn't as complicated as 30 SEO listicles make it seem. There are really only four questions that matter.
The four questions that decide everything
1. Is email your primary business, or is it supporting a different business?
This is the single biggest factor. The tools that are best for "email is the business" (newsletter, paid newsletter, creator email) are different from the tools best for "email is supporting" (e-commerce, course sales, lead nurture).
If email is the business: You want a tool built for creators — ConvertKit, Beehiiv, Ghost. These are designed around the workflow of: write, send, grow. They make the deliverability and growth mechanics effortless. The trade-off: more expensive, less automation.
If email is supporting a different business: You want a tool built for marketers — Moosend, MailerLite, ActiveCampaign, Systeme. These are designed around the workflow of: capture → segment → automate → measure. The trade-off: less creator-friendly, but more powerful and cheaper.
2. How big is your list, and how fast is it growing?
List size and growth rate dictate pricing tier. A 1,000-subscriber list is cheap on every tool. A 10,000-subscriber list is 3-5x more expensive on some tools than others.
Rule of thumb: if you're under 5,000 subscribers, price differences are small enough that features matter more. If you're over 10,000, pricing tiers diverge significantly — Moosend is 40-60% cheaper than ConvertKit at every tier.
3. Do you need automation, or just broadcasts?
This sounds obvious but it changes the answer dramatically. Most beginners think they need "automation" when they actually need a "welcome sequence" (which is 3-5 emails, triggered by signup, with no logic). That's a 30-minute setup in any tool.
Real automation — branching logic, behavior-based triggers, lead scoring, multi-channel orchestration — is a different beast. You only need it if you have a real funnel with multiple touchpoints and need to react to behavior.
If you just need welcome + 2-3 sequences: MailerLite, Moosend, or the free tier of almost any tool is fine.
If you need real automation: Moosend, ActiveCampaign, or HubSpot.
4. How technical are you?
Be honest. "I can copy-paste an HTML snippet" is a different technical level from "I can build a custom integration with webhooks."
Most email tools have similar UX for the basics. The differentiation shows up in advanced use cases: custom integrations, API, webhooks, advanced segmentation, conditional content. If you're not technical, the difference between ConvertKit and ActiveCampaign is irrelevant — pick whichever is more intuitive.
Tool-by-tool recommendation
Moosend — best for: small businesses, e-commerce, lean marketers
- Free plan: up to 1,000 subscribers, no automation
- Paid: $9-129/mo by list size
- Best feature: abandoned cart automation + landing pages, included free
- Skip if: you're a newsletter-first creator (use ConvertKit or Beehiiv)
Read our full Moosend review for the deep dive.
MailerLite — best for: designers, visual-first brands, creators
- Free plan: up to 1,000 subscribers, no automation
- Paid: $10-330/mo by list size
- Best feature: the most beautiful email editor, great templates, website builder included
- Skip if: you need deep automation (the platform is more visual-first than power-user)
ConvertKit (now "Kit") — best for: creators, course sellers, solopreneurs
- Free plan: up to 1,000 subscribers, no automation
- Paid: $9-279/mo by list size
- Best feature: visual automations + creator commerce (sell products, courses, paid newsletters) in one tool
- Skip if: you're a B2B / e-commerce (overkill)
Beehiiv — best for: newsletter publishers (free + paid newsletters)
- Free plan: up to 2,500 subscribers, no custom branding
- Paid: $0-99/mo by list size (Launch, Scale, Max tiers)
- Best feature: built-in ad network (you can monetize your newsletter with their ad placements), SEO-friendly web versions
- Skip if: you don't want a newsletter-first workflow
Systeme.io — best for: all-in-one beginners on a budget
- Free plan: up to 2,000 contacts, 1 funnel, 1 course, 1 workflow
- Paid: $27-97/mo
- Best feature: bundles email + funnels + courses + affiliate program in one tool
- Skip if: you want best-in-class for each piece (use Moosend + ClickFunnels + Teachable separately)
Read our full Systeme.io review.
ActiveCampaign — best for: marketers who need real automation
- Free plan: none
- Paid: $29-149/mo by list size + features
- Best feature: most powerful automation builder on the market, deep CRM
- Skip if: you're a beginner (overkill, steep learning curve)
The decision tree (TL;DR)
Read down the questions until you hit a "use this":
- Is email your entire business? → ConvertKit / Beehiiv
- Is your list under 1,000 and you're not sure you'll keep using email? → Moosend free / MailerLite free / Systeme free (any of them)
- Are you running an e-commerce shop? → Moosend (abandoned cart is best-in-class for the price)
- Are you selling a course or coaching? → Systeme.io (bundled with course hosting) or ConvertKit
- Do you need complex automations and you have the budget? → ActiveCampaign
- Are you on a tight budget and need everything in one tool? → Systeme.io ($27/mo Startup plan)
- Is your list over 5,000 and growing? → Moosend (cheapest at scale)
Common mistakes to avoid
Mistake 1: Choosing based on what someone with a 100k list uses
ConvertKit is great for someone with 50,000 subscribers. It's overkill for someone with 200. The features that matter for the former don't matter for the latter.
Mistake 2: Paying for a tool that does what your free plan already does
Moosend's free plan, MailerLite's free plan, Systeme.io's free plan, ConvertKit's free plan, and Beehiiv's free plan all cover 80% of beginner use cases. Don't pay until you actually need to.
Mistake 3: Switching tools every 3 months
Every migration costs you 2-4 weeks of "did I get the segments right, did I get the automations right." Pick a tool that fits your current stage, use it for 12+ months, and only switch when you've outgrown a real feature (not when a new tool has a shiny new feature you might not even need).
Mistake 4: Optimizing for "what if I grow" instead of "what works now"
"What if I grow to 50,000 subscribers" is a real concern for maybe 1% of people reading this. For the other 99%, the right question is "what works for me today" — which is usually the free plan or the cheapest paid plan.
The honest verdict
If I had to pick one tool for someone starting from zero with $0 to spend: Systeme.io's free plan. You get email + 1 funnel + 1 course + 1 blog. Use it for 3-6 months. If you outgrow it, you'll know what specific feature is missing — and that tells you which tool to upgrade to.
If I had to pick one for someone with a small business doing $1-10k/mo: Moosend. The automation + landing pages + deliverability are best-in-class for the price, and the scaling math is friendlier than the alternatives.
If I had to pick one for a creator building a newsletter-first business: ConvertKit or Beehiiv. The creator-first workflows are worth the price premium.
The rest is just details. The biggest email mistake is overthinking the tool — your first 1,000 subscribers and your first $1k MRR will come from writing and sending, not from picking the perfect tool.