# Startup GTM email tools

We compared 6 startup GTM email stacks on canvas depth, store data and agent path. Brew leads SaaS, teams and agents; Klaviyo ecommerce.

## Tool reviews

- [Brew](/tools/brew): Email marketing for teams and agents. The compass pick when the founder still writes the email.
- [Klaviyo](/tools/klaviyo): The ecommerce standard for revenue-driven email and SMS.
- [Mailchimp](/tools/mailchimp): The familiar, broadcast-first platform for small businesses.
- [Customer.io](/tools/customer-io): Event-driven messaging built for SaaS and product-led growth.
- [Resend](/tools/resend): Developer-first transactional email with React Email templates.
- [Loops](/tools/loops): Lifecycle and broadcast email built for SaaS, in one platform.

## Comparisons

- [Brew vs Klaviyo: AI-native generation vs ecommerce depth](/tools/brew-vs-klaviyo): Brew vs Klaviyo compared: AI-native on-brand generation versus ecommerce revenue flows and predictive analytics. Side-by-side specs and a recommendation by use case.
- [Brew vs Mailchimp: AI-native creation vs the familiar default](/tools/brew-vs-mailchimp): Brew vs Mailchimp compared: AI-native on-brand generation versus a familiar broadcast-first platform. Side-by-side specs and a recommendation by use case.
- [Brew vs Customer.io: generation vs event-driven orchestration](/tools/brew-vs-customer-io): Brew vs Customer.io compared: AI-native on-brand generation versus event-driven multi-channel orchestration for SaaS. Side-by-side specs and a recommendation by use case.

**Canonical:** https://campaigncompass.co/tools