Map email service providers (ESPs), newsletter platforms, transactional delivery, and self-hosted newsletter tools — then dig into the Newsletter Info Blog.
| Role | Examples | You are buying |
|---|---|---|
| Marketing email service provider (ESP) | Mailchimp, Klaviyo, ActiveCampaign, Brevo | Lists, campaigns, automation UI |
| Newsletter platform | Substack, Beehiiv, Kit, Ghost(Pro) | Publishing + growth/monetization |
| Transactional / delivery | SendGrid, Amazon SES, Mailgun, Postmark | API/SMTP delivery |
| Self-hosted | Listmonk, Keila, Mautic, Sendy | Software + your infra + SMTP |
| Enterprise MAP | SFMC, Braze, Iterable, Marketo | Journeys at enterprise scale |
Products: Mailchimp,Beehiiv,SendGrid,Amazon SES
Mailchimp is a full ESP for campaigns/automation; Beehiiv is a newsletter media business platform; SendGrid/SES are delivery APIs (transactional/bulk) that power other tools.
When to use: Use ESP for marketing lists; newsletter platform for publisher growth/monetization; SES/SendGrid when you bring your own app (Sendy, Listmonk, custom).
Products: Listmonk,Keila,Mautic,Mailchimp,MailerLite
Self-hosted (Listmonk/Keila/Mautic) give data control and lower marginal cost but need SMTP/ops; SaaS is faster to launch with deliverability support.
When to use: Self-host when privacy/cost at scale matters; SaaS when team wants managed deliverability and support.
Products: Substack,Beehiiv,Ghost(Pro),Kit
Substack takes ~10% of paid revenue; Beehiiv emphasizes ads/referrals with lower take rates; Ghost offers memberships on your brand; Kit focuses on creator funnels/courses.
When to use: Substack for fastest paid audience; Beehiiv for growth ops; Ghost for owned brand; Kit for digital products.
Products: Klaviyo,Omnisend,Drip,Shopify Email
Klaviyo is the ecommerce standard for flows/SMS; Omnisend is strong omnichannel value; Drip is DTC CRM; Shopify Email is native but limited.
When to use: Klaviyo at serious GMV; Omnisend for value; Shopify Email for simplest store sends.
Products: Salesforce Marketing Cloud,Braze,Iterable,Adobe Campaign,Marketo Engage
Enterprise marketing automation / engagement clouds with journeys, CDP-like data, and high contract prices.
When to use: Large orgs needing journeys across email/push/SMS with existing CRM stacks.
Products: Litmus,Email on Acid,MJML,Stripo,Unlayer
Builders (Stripo/Unlayer/MJML) create HTML; Litmus/EOA validate rendering and accessibility across clients.
When to use: Always pair design tools with client preview QA before major sends.
Products: Mailchimp,SendGrid,Amazon SES
Mailchimp = marketing UI + list management; SendGrid = API + some marketing; SES = raw cheap delivery requiring reputation management.
When to use: Don't confuse SES cost with total cost of ownership — self-hosted tools + SES still need bounce handling and compliance.