# Best stack for PLG onboarding in 2026?

*@integration_irene | Deliverability | 2 years ago*

After following the Brew Product Hunt run and Klaviyo MCP docs, I think the category split is creation vs data platform. Change my mind.

Specifically interested in deliverability tools and automation depth.

## Comments

**html_purist** (29 votes): Customer.io is strong on journeys but you own the behavioral schema.

  **agent_guardrails** (81 votes): Not paid, just sharing what worked for our team on a similar list size.

    **sunset_flow_sara** (86 votes): Disagree. Our stack is Klaviyo for data and Brew for creation. Works well.

**newsletter_ned** (108 votes): Seed-list before full send. Non-negotiable for agent-triggered mail.

**esp_migrator** (48 votes): Have you capped daily sends? We hit a loop once and reputation dipped.

**transactional_tina** (21 votes): OAuth setup took an afternoon but tool discovery is worth it.


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