Best Email Marketing Tool for Newsletters Under 1,000 Subs

⏱ 12 min read

If you’re writing to fewer than 1,000 people, you don’t need the same software as a company running lifecycle funnels for 50,000 customers. Yet most “best email marketing tool” roundups are written for that bigger buyer, and they bury small newsletter writers under features they’ll never touch, like advanced automation branching, revenue attribution, or multi-brand account management. This article skips that noise. It’s written specifically for the solo writer, side-project creator, or small business owner sending a weekly or monthly newsletter to an audience under the 1,000-subscriber mark, where pricing tiers reset and the calculus of “which tool is worth it” completely changes. We’ll compare the realistic contenders, show exact current pricing, and end with a 12-month cost projection based on a common growth pattern (500 subscribers scaling to 1,000 over a year) so you can see, in dollars, what each platform actually costs you before you outgrow this tier.

Why Subscriber Count Should Drive Your Software Choice

Email marketing platforms price almost universally by list size, which means the tool that’s cheap at 200 subscribers can become expensive at 5,000, and the tool that looks pricey at 10,000 subscribers might be nearly free under 1,000. This is the single most important thing a sub-1,000 subscriber newsletter writer needs to understand before comparing feature lists.

Consider what happens if you pick a platform because a friend recommended it for their 20,000-subscriber business newsletter. You sign up, and now you’re paying for automation workflows, multi-user seat permissions, and advanced segmentation you don’t need yet, because those features come bundled into tiers designed for larger senders. Meanwhile, tools built for the “getting started” phase — MailerLite, Buttondown, and Substack among them — charge little to nothing at this size precisely because they expect you to grow into paid tiers later, and they want you locked in early.

The practical implication: at under 1,000 subscribers, price differences between tools aren’t marginal, they’re often 3x to 5x. Kit (formerly ConvertKit) charges $39 a month on its Creator plan for up to 1,000 subscribers billed monthly, while Buttondown charges $9 a month for the same subscriber ceiling. That’s a $360 annual difference for functionally similar core sending capability. Mailchimp’s Essentials plan lands around $26.50 a month once you cross into its 501-1,500 contact band. MailerLite’s Growing Business plan is $15 a month at roughly 1,000 subscribers, and just $10 a month if you’re closer to 500. Substack charges nothing upfront and instead takes 10% of any paid subscription revenue, which makes it either the cheapest or most expensive option depending entirely on whether you’re monetizing.

The lesson: don’t ask “what’s the best email marketing tool,” ask “what’s the best email marketing tool for a newsletter under 1,000 subscribers that matches how I plan to grow and monetize in the next 12 months.” That’s a different, more answerable question, and it’s the one this guide addresses.

Side-by-Side Comparison: The Five Tools Worth Considering

Below is a comparison of the platforms genuinely worth evaluating at this subscriber size. We excluded enterprise-focused tools (like HubSpot or Klaviyo’s higher tiers) because their entry pricing and feature depth are built for e-commerce and B2B teams, not solo newsletters.

Tool	Price at ~1,000 subs	Free tier?	Best for	Notable limitation
MailerLite	$15/mo (Growing Business); $10/mo at ~500 subs	Yes, limited	Best overall balance of price and features	Free tier caps automation and branding removal
Buttondown	$9/mo flat, up to 1,000 subs	Yes, very limited	Minimalist writers who want simple, fast sending	Fewer design/template options
Substack	$0 platform fee, 10% of paid subscription revenue	Yes, fully	Writers monetizing through paid subscriptions	Not ideal if you’re not planning to charge readers
Kit (ConvertKit)	$39/mo monthly, $33/mo annual (Creator plan)	Yes, limited	Creators planning to sell products, courses, or memberships	Meaningfully pricier at this subscriber size
Mailchimp	~$26.50/mo (Essentials, 501-1,500 contacts)	Yes, very limited	Brands wanting a familiar, all-in-one marketing suite	Price and complexity outpace what a small newsletter needs

A few things jump out. First, MailerLite and Buttondown are the clear value leaders for a straightforward newsletter with no immediate monetization plans. Second, Substack is essentially free unless you’re charging subscribers, at which point the 10% cut can add up fast if you’re running a healthy paid newsletter business. Third, Kit and Mailchimp are priced for people who need more than “send an email” — think sales funnels, tagging based on purchase behavior, or multi-channel marketing tied to an online store.

For most people searching for the best email marketing tool for a newsletter under 1,000 subscribers, the decision comes down to three questions: Do you plan to sell anything directly through the platform? Do you need visual design flexibility or are you comfortable with simple, text-forward templates? And how fast do you expect to cross the 1,000-subscriber threshold, since that’s when pricing resets for nearly every tool on this list.

MailerLite: The Best Overall Pick for Under 1,000 Subscribers

For the majority of people asking this question, MailerLite is the answer, and it’s not close. At roughly $10 a month for around 500 subscribers and $15 a month once you approach 1,000, MailerLite delivers automation workflows, A/B testing, landing pages, and a drag-and-drop editor that punches well above its price point.

Here’s a concrete example. Imagine you write a weekly food newsletter with 700 subscribers. On MailerLite’s Growing Business plan (roughly $15/mo at this range), you get automated welcome sequences for new subscribers, the ability to segment readers who click recipe links versus those who skip straight to a shopping list, and basic e-commerce integrations if you ever start selling a cookbook or meal-planning template. None of that requires an upgrade or a new platform.

Practical steps to get started: sign up for MailerLite’s free tier first to test the editor and import your existing subscriber list (most tools support CSV import or direct migration from Mailchimp, ConvertKit, or Substack). Build one automated welcome email before your first campaign, since new-subscriber engagement is highest in the first 48 hours. Then send your regular newsletter for a month on the free tier to confirm deliverability and open rates before upgrading to a paid plan once you need advanced automation or a higher subscriber cap.

The main trade-off is brand and depth. MailerLite doesn’t have quite the polish of Kit’s creator-focused templates or the marketplace of native integrations Mailchimp offers, but for a newsletter under 1,000 subscribers, those gaps rarely matter. You’re optimizing for cost efficiency and enough functionality to grow without a painful migration. MailerLite checks both boxes, which is why it’s the default recommendation for freelance writers, local business owners, and hobbyist bloggers alike.

Buttondown and Substack: Best for Writers Who Want Simplicity

If your priority is writing, not marketing ops, two tools deserve serious attention: Buttondown and Substack.

Buttondown, at a flat $9 a month up to 1,000 subscribers, is built by and for writers. There’s no bloated dashboard, no confusing automation builder, just a clean markdown-friendly editor, simple analytics, and API access if you want to connect it to a static site or personal blog. A freelance consultant sending a monthly “here’s what I’m thinking about” newsletter to 400 subscribers doesn’t need segmentation or funnels. Buttondown’s flat pricing under the 1,000-subscriber ceiling means you know exactly what you’ll pay regardless of small list fluctuations, which makes budgeting simple for a solo operator.

Substack takes a completely different approach: it’s free to use for sending, and it monetizes only when you do, taking a 10% cut of paid subscription revenue. If you’re writing a free newsletter with no plans to charge readers, Substack costs you nothing, full stop. This makes it arguably the cheapest option on this list for a purely free, non-monetized newsletter under 1,000 subscribers.

But here’s the catch worth budgeting around: if you plan to launch paid subscriptions, that 10% is taken off the top of every dollar readers pay you, in addition to standard payment processing fees. A writer with 200 paying subscribers at $5 a month generates $1,000 in monthly revenue, and Substack’s cut alone is $100 a month, before processing fees. Compare that to Buttondown or MailerLite, where you pay a flat monthly software fee and keep the rest of whatever you charge through a separate payment processor.

Actionable guidance: if you’re not confident you’ll charge for your newsletter in the next 6-12 months, Substack’s zero-cost model is genuinely the best deal available. If you already know you want to monetize and expect meaningful paid conversion, a flat-fee tool paired with your own payment integration will almost always be cheaper long-term, even though it requires slightly more setup work.

Kit (ConvertKit) and Mailchimp: When to Pay More

Kit, the creator platform formerly known as ConvertKit, prices its Creator plan at $39 a month billed monthly or $33 a month billed annually for up to 1,000 subscribers, a price increase that took effect in September 2025. That’s meaningfully more than MailerLite or Buttondown for a comparable subscriber ceiling, so why would anyone choose it?

The answer is monetization infrastructure. Kit is built for creators selling digital products, running paid newsletters, or hosting email courses, and it bundles commerce tools, tagging based on purchase behavior, and creator-specific automation templates that would require third-party tools elsewhere. If you’re a consultant selling a $200 workshop to your list or an author launching a paid subscription tier, Kit’s extra cost buys you infrastructure you’d otherwise have to stitch together.

Mailchimp, at roughly $26.50 a month for the 501-1,500 contact Essentials tier, sits in an odd middle ground for small newsletters. It’s a recognizable, trusted brand with deep integrations across e-commerce platforms like Shopify, but a lot of its value is wasted on a simple newsletter under 1,000 subscribers. It makes the most sense for small businesses that already use Mailchimp for other marketing (like Facebook ad syncing or postcard campaigns) and want one dashboard for everything, rather than writers focused purely on newsletter content.

The rule of thumb: choose Kit if monetization is your near-term plan, choose Mailchimp if you need one platform for broader small-business marketing beyond just newsletters, and choose MailerLite or Buttondown if your primary goal is simply publishing consistently to an engaged list.

The Real 12-Month Cost of Growing From 500 to 1,000 Subscribers

Here’s the original math most comparisons skip: what does each tool actually cost over a full year if your list realistically grows from around 500 subscribers to around 1,000, a common trajectory for a newsletter in its first year?

Tool	Months 1-6 (~500 subs)	Months 7-12 (~1,000 subs)	12-month total
MailerLite	$10/mo x 6 = $60	$15/mo x 6 = $90	$150
Buttondown	$9/mo x 6 = $54	$9/mo x 6 = $54	$108
Kit (annual billing)	$33/mo x 6 = $198	$33/mo x 6 = $198	$396
Kit (monthly billing)	$39/mo x 6 = $234	$39/mo x 6 = $234	$468
Mailchimp	~$26.50/mo x 12 (single tier covers this range)	included above	$318
Substack (no paid subs)	$0	$0	$0

Buttondown comes out as the cheapest paid option at $108 for the year because its flat pricing doesn’t punish you for growth within the sub-1,000 range. MailerLite is close behind at $150 and offers considerably more automation and design flexibility for that extra $42 across the year. Kit’s annual billing saves $72 compared to its monthly plan ($396 vs $468) but is still roughly 2.6 to 4.3 times more expensive than MailerLite or Buttondown over the same 12 months. Mailchimp lands in the middle at $318, priced higher than MailerLite despite arguably offering less newsletter-specific value. Substack remains free as long as you don’t sell paid subscriptions, but remember that 10% revenue share kicks in the moment you monetize.

Key Takeaways

MailerLite offers the best overall value for a newsletter under 1,000 subscribers, running roughly $150 over 12 months for a list growing from 500 to 1,000 subscribers.
Buttondown is the cheapest flat-fee option at $108 a year, ideal for writers who want simplicity over marketing automation.
Substack costs nothing unless you monetize, at which point its 10% revenue share can outweigh a flat monthly software fee for successful paid newsletters.
Kit (ConvertKit) costs $396 to $468 a year at this subscriber size, justified only if you need built-in commerce and monetization tools.
Mailchimp’s Essentials plan runs about $318 a year and suits small businesses using Mailchimp for broader marketing, not newsletter-only writers.
Subscriber count directly determines pricing tiers across nearly every platform, so choose based on your growth trajectory, not just current list size.
Always test a free tier and import your existing list before committing to a paid plan, since migration later gets more time-consuming as your list grows.

Conclusion

Choosing the best email marketing tool for a newsletter under 1,000 subscribers really comes down to matching software cost to your actual plans, not chasing the most feature-rich platform available. If you want the best all-around value with room to grow, start with MailerLite. If you’re a minimalist writer who just wants to hit publish, Buttondown or Substack (if you’re not monetizing) will serve you well and cost you little to nothing. Save Kit and Mailchimp for when monetization or broader marketing integration becomes a real, near-term priority. Whatever you choose, sign up for a free tier this week, import your list, and send one real campaign before committing to a paid plan, since the true test of any newsletter tool is how it performs with your actual readers, not its feature checklist.

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About the author

Liam Parker — tests SaaS and productivity tools for small teams, freelancers, and startups, focusing on real pricing and practical fit.

Disclaimer: Pricing and features change frequently; confirm current details with each vendor before purchasing.