Email is still the highest-ROI marketing channel for founders. Social media algorithms change, SEO takes months, paid ads burn cash. But an email list is yours. No algorithm sits between you and your audience. The tool you pick for email marketing matters less than actually sending emails, but the right tool makes it dramatically easier to stay consistent.
I have used six email tools over the past three years. Here is what I recommend depending on where you are and what you need.
The quick verdict
Best overall: Kit (formerly ConvertKit) - built for creators and founders. Clean automations, good deliverability, and a free plan for up to 10,000 subscribers.
Best for newsletters: Beehiiv - the best tool for running a newsletter as a product, with built-in monetization and growth features.
Best for developers: Resend - modern API, beautiful email templates with React Email, and the best developer experience in the category.
Best for SaaS: Loops - purpose-built for SaaS companies. Onboarding sequences, product updates, and lifecycle emails done right.
Kit (ConvertKit) - the creator's choice
Kit has been the go-to email tool for creators and solo founders since 2020, and the reputation is deserved. The visual automation builder is intuitive. The subscriber tagging system is flexible without being overwhelming. The landing pages and forms are good enough that you do not need a separate tool for lead capture.
Kit's free plan supports up to 10,000 subscribers, which is genuinely generous. You get email broadcasts, landing pages, and forms at no cost. The paid plan at $25/month adds automations, sequences, and advanced analytics. For most founders, the free plan covers the first year of list building.
The email editor is simple by design. You write text, add images, and send. There are no complex drag-and-drop layout builders. This is intentional. Plain text and simple formatted emails consistently outperform heavily designed ones for open rates and click-through rates. Kit encourages you to write good emails rather than design pretty ones.
Deliverability is strong. Kit focuses on permission-based marketing and actively discourages spammy practices. Your emails land in inboxes, not spam folders.
Pricing: Free for up to 10,000 subscribers. Creator plan at $25/month. Creator Pro at $50/month.
Beehiiv - best for newsletter businesses
Beehiiv was built specifically for newsletter operators, and it shows. The platform includes everything you need to run a newsletter as a business: subscriber management, a web publication, SEO-optimized archives, referral programs, paid subscriptions, and ad network integration.
The referral program feature is particularly powerful. Subscribers earn rewards for referring new readers, which creates organic growth without paid ads. Several newsletters have grown from zero to 50,000+ subscribers using Beehiiv's referral system alone.
The writing experience is excellent. The editor is clean and fast, with good formatting options and easy image handling. You can schedule posts, set up welcome sequences, and segment your audience based on behavior.
If your goal is to build a newsletter that eventually generates revenue through ads, sponsorships, or paid subscriptions, Beehiiv is purpose-built for that journey.
Pricing: Free for up to 2,500 subscribers. Scale at $39/month with full features.
Resend - best for developers
Resend is the email tool built by developers for developers. The API is clean and well-documented. The email templates use React Email, which means you build emails with the same technology you use for your web app. For a technical founder, this is a natural workflow.
Resend handles both transactional email (password resets, order confirmations) and marketing email (newsletters, announcements). Having both in one tool simplifies your stack. You do not need SendGrid for transactional and Mailchimp for marketing. Resend does both.
The analytics are developer-friendly too. Delivery rates, open rates, click rates, and bounce rates with filtering and API access. You can build custom dashboards or pipe the data into your analytics system.
The tradeoff is that Resend has no visual email builder for non-technical users. If you or your team cannot write code (or use React Email templates), the email creation process is harder than Kit or Beehiiv.
Pricing: Free for 3,000 emails/month. Pro at $20/month for 50,000 emails/month.
Loops - best for SaaS companies
Loops is built specifically for SaaS businesses. The focus is on lifecycle emails: onboarding sequences, feature announcements, trial expiration reminders, and churn prevention campaigns. If you run a SaaS product, these are the emails that directly impact revenue.
Loops integrates with your product data to trigger emails based on user behavior. When a user completes onboarding, send a tips email. When they have not logged in for a week, send a re-engagement email. When their trial is about to expire, send a conversion email. This event-based approach is more effective than time-based sequences.
The interface is clean and focused. You will not find a bloated feature list here. Loops does SaaS email well and does not try to be a newsletter platform or a full marketing suite.
Pricing: Free for up to 1,000 contacts. Starter at $25/month.
Mailchimp - the legacy option
Mailchimp is the most well-known email marketing tool, and it still works fine for basic needs. The free plan supports 500 contacts and 1,000 sends per month. The drag-and-drop editor is easy to use. The template library is large.
The problem with Mailchimp in 2026 is pricing. Once you outgrow the free plan, costs escalate quickly. At 5,000 subscribers, you are paying $75/month for Mailchimp Standard versus $25/month for Kit. The feature gap does not justify the price difference for most founders.
Mailchimp also suffers from feature bloat. It has added a website builder, social media scheduling, CRM features, and more. Each addition makes the core email product harder to navigate. For a founder who just wants to send great emails, simpler tools are better.
Pricing: Free for 500 contacts. Essentials at $13/month. Standard at $20/month.
Buttondown - the minimal option
Buttondown is the simplest email tool on this list. Write in Markdown, hit send. No complex automation builder, no elaborate template system, no feature bloat. Just you and your words reaching your subscribers.
Buttondown is perfect for founders who want a weekly newsletter without any friction. The paid plan adds subscriber tagging, analytics, and custom domains. But even the free tier is enough to build and maintain a quality newsletter.
Pricing: Free for up to 100 subscribers. Basic at $9/month.
Bottom line
For most founders, start with Kit. The free plan is generous, the tool is easy to learn, and it scales from zero to hundreds of thousands of subscribers. If you are building a newsletter business, use Beehiiv. If you are a developer who wants API-first email, use Resend. If you run a SaaS product, use Loops.
The best email tool is the one you will actually use consistently. A weekly email from a simple tool beats a sophisticated automation system that you set up once and never touch again.
Compare these tools feature by feature with our comparison tool, or see our newsletter tools deep dive for more detail.