EMAIL MARKETING GUIDE

Choose email marketing software that fits your list size.

Most email tools price by subscriber count, so the right choice today can get expensive fast as your list grows.

Last checked: September 2026

Affiliate disclosure: This page contains affiliate links. If you purchase through one of these links, we may earn a commission at no additional cost to you. This does not affect our editorial recommendations.

1. Check the pricing curve

Look at pricing not just for your current list size, but for 2-3x that size. Some tools stay cheap early and become expensive fast at scale.

2. Check deliverability reputation

A cheap tool with poor deliverability means your emails land in spam. Look for providers with strong sender reputation and authentication support (SPF, DKIM, DMARC).

3. Check automation depth

4. Check your exit route

Verify you can export your full subscriber list and campaign history if you switch providers later.

Check an option

Recommended Email Marketing Tool

Kit (formerly ConvertKit) offers a generous free plan up to 10,000 subscribers, visual automation, and built-in landing pages — a strong starting point if you're building a list without wanting to overpay early.

Where the price changes: Kit is free for up to 10,000 subscribers. If you grow past that threshold, you automatically switch to a paid tier — so calculate your costs not just for your current list size, but for where you project to be in 12 months.

Check Kit's Current Pricing →

Growth cost calculator

Enter the price at your current list size and the expected price after growth to see the cost over time.

Real cost comparison (indicative)

Approximate pricing at a list of roughly 2,000-5,000 contacts. Always verify current pricing with the provider — it changes with list size.

Tool Free tier Entry paid tier Biggest hidden cost
Mailchimp Up to ±500 contacts ±$13-20/mo Price scales quickly per extra 500-1,000 contacts
ActiveCampaign None ±$15-29/mo Advanced automation requires a higher tier
Klaviyo Up to ±250-500 contacts ±$20-45/mo SMS features priced separately, cost rises with revenue tracking

Popular options compared

BEST FOR BEGINNERS

Mailchimp

Well-known, simple interface with a usable free tier for small lists.

  • Free plan for small lists
  • Large template library
  • Easy drag-and-drop editor
BEST FOR AUTOMATION

ActiveCampaign

Deep automation and CRM-style contact tracking built in.

  • Advanced automation builder
  • Built-in CRM features
  • Strong segmentation
BEST FOR ECOMMERCE

Klaviyo

Built specifically for online stores with revenue tracking.

  • Deep ecommerce integrations
  • Revenue attribution
  • Pre-built ecommerce flows

Frequently asked questions

Why did my email bill suddenly increase?

Most providers bill by subscriber count. Crossing a pricing tier threshold—even by one contact—can bump you to the next price bracket.