# Case study: split stack with Activecampaign + Braze

*@brandvoice_em | Deliverability | 1 year ago*

Deliverability question before we let an agent trigger more sends. What guardrails do you enforce?

Specifically interested in A/B testing and segmentation.

## Comments

**braze_bigco** (94 votes): OAuth setup took an afternoon but tool discovery is worth it.

**agent_guardrails** (37 votes): Resend MCP plus React Email is clean if engineers own transactional.

**priya_m** (87 votes): Mailchimp AI did not pass our bar. Fine for subject lines, not operations.

**cart_abandon_pro** (35 votes): Not paid, just sharing what worked for our team on a similar list size.


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