All providers

Simple send-to-test-address spam score checks.

Free weekly DMARC digests, plus a paid DMARC Digests upgrade.

DMARC management from one of the category specialists.

DMARC, SPF, DKIM, BIMI, and deliverability monitoring.

Inbox placement testing plus DMARC analytics.

Email warmup plus spam testing for outbound teams.

Warmup priced by daily emails instead of connected accounts.

Blacklist, DNS, DMARC, and delivery monitoring tools.

Email warmup and deliverability monitoring for sender reputation.

Free routing, programmable inbound via Workers, sending in beta.

Email-to-webhook with TypeScript-first DX.

Long-running inbound email to HTTP service.

Inbound email to schema-validated JSON.

EU-hosted inbound email to webhook service.

Programmable inboxes for testing, inbound workflows, and email automation.

Behavior-driven lifecycle messaging.

Modern lifecycle and broadcast email for SaaS.

SaaS lifecycle email with account-level data.

SaaS-focused marketing automation with behavior-based flows.

Broad marketing automation and CRM for growing businesses.

Ecommerce-focused marketing automation.

Ecommerce marketing automation with behavior-based segmentation.

All-in-one with a generous daily free tier.

Budget-friendly email marketing with a generous free plan.

Legacy marketing giant, transactional via Mandrill.

Low-cost email API and SMTP relay with marketing features nearby.

Open-source unified email platform.

Creator-focused newsletter platform (formerly ConvertKit).

European-focused, GDPR-friendly all-in-one.

Twilio-owned veteran with broad SDK coverage.

Marketing suite with a generous transactional SMTP tier.

Minimalist, indie-built newsletter platform.

Open-source publishing with built-in memberships and email.

Modern lifecycle and broadcast email for SaaS.

Creator-focused newsletter platform (formerly ConvertKit).

Self-hosted newsletter and mailing list manager.

Hosted newsletter platform with social network features.

Notification infrastructure with workflow engine.

Open-source notification infrastructure.

Notification workflow API with preferences, batching, and multi-tenant options.

Notification infrastructure with visual journeys.

Multi-channel notification infrastructure with predictable event pricing.

Notification inbox and multi-channel delivery platform.

Open-source mail delivery platform.

Dockerized groupware and email server suite.

Composable all-in-one mail server.

Open-source unified email platform.

Self-hosted newsletter and mailing list manager.

Open-source transactional email server with a web UI.

Open-source notification infrastructure.

Open-source publishing with built-in memberships and email.

Build emails with React components.

Code-first email editor with live previews across major clients.

Minimal logic template language used across email systems.

Tailwind-based email framework.

Markup language for responsive email.

Responsive email framework with Inky markup and Sass tooling.

Safe template language created by Shopify.

Modern local SMTP catcher.

Originally a staging inbox, now a sender too.

Throwaway SMTP accounts on demand.

Node-based local SMTP catcher.

Tiny Ruby-based local SMTP catcher.

Classic local SMTP catcher (unmaintained since 2020).

Code-first email editor with live previews across major clients.

Email client previews and pre-send QA across 100+ inbox environments.

Programmable inboxes for testing, inbound workflows, and email automation.

Email previews and pre-deployment QA across 90+ clients.

Cheapest at scale, most setup work.

Transactional-only, fast and well-delivered.

Developer-leaning email infra, owned by Sinch.

Reliable SMTP relay with strong deliverability.

Originally a staging inbox, now a sender too.

Modern lifecycle and broadcast email for SaaS.

Twilio-owned veteran with broad SDK coverage.

Modern transactional API with a clean UI.

Low-cost email API and SMTP relay with marketing features nearby.

Marketing suite with a generous transactional SMTP tier.

Transactional email delivery with simple annual plans.

Email API tightly coupled to React Email.

Legacy SMTP relay and email delivery service.

Free routing, programmable inbound via Workers, sending in beta.

All-in-one with a generous daily free tier.

Behavior-driven lifecycle messaging.

Open-source unified email platform.

Open-source transactional email server with a web UI.

European-focused, GDPR-friendly all-in-one.

Open-source mail delivery platform.

High-volume sender with deep analytics.

Legacy marketing giant, transactional via Mandrill.