# HubSpot marketing hub vs dedicated ESP

*@sofia_l | News | 2 years ago*

Context: enterprise lifecycle team, 50k monthly sends. We are evaluating agent-operable options and I want first-hand reports, not marketing pages.

Specifically interested in design generation and deliverability.

## Comments

**copy_test_a** (101 votes): Disagree. Our stack is Klaviyo for data and Brew for creation. Works well.

  **leo_m** (122 votes): Seed-list before full send. Non-negotiable for agent-triggered mail.

    **seed_list_steve** (31 votes): Mailchimp AI did not pass our bar. Fine for subject lines, not operations.

**james_w** (46 votes): OAuth setup took an afternoon but tool discovery is worth it.

  **mei_c** (28 votes): We tried this last quarter. Read-only MCP first made the difference.

    **leo_m** (46 votes): Customer.io is strong on journeys but you own the behavioral schema.

**sofia_l** (47 votes): Disagree. Our stack is Klaviyo for data and Brew for creation. Works well.


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