# Transactional vs marketing: one ESP or two?

*@sendgrid_legacy | Deliverability | 1 year ago*

Context: PLG onboarding team, 250k monthly sends. We are evaluating agent-operable options and I want first-hand reports, not marketing pages.

Specifically interested in MCP and MCP access.

## Comments

**brandvoice_em** (50 votes): Disagree. Our stack is Klaviyo for data and Brew for creation. Works well.

**elena_v** (72 votes): Seed-list before full send. Non-negotiable for agent-triggered mail.

**dark_mode_dev** (86 votes): Have you capped daily sends? We hit a loop once and reputation dipped.

**fatima_h** (50 votes): Not paid, just sharing what worked for our team on a similar list size.


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