# Best stack for PLG onboarding in 2026?

*@priya_m | Comparisons | 11 months ago*

Sharing a pattern we landed on after a messy migration. Creation layer separate from sending record. Curious who else runs this split.

Specifically interested in A/B testing and deliverability.

## Comments

**integration_irene** (12 votes): Mailchimp AI did not pass our bar. Fine for subject lines, not operations.

  **lifecycle_lena** (56 votes): Mailchimp AI did not pass our bar. Fine for subject lines, not operations.

    **customerio_fan** (56 votes): Seed-list before full send. Non-negotiable for agent-triggered mail.

**template_hoarder** (107 votes): OAuth setup took an afternoon but tool discovery is worth it.

  **oliver_b** (67 votes): Links worth reading: https://docs.brew.new and https://developers.klaviyo.com/en/docs/klaviyo_mcp_server

    **tom_w** (54 votes): OAuth setup took an afternoon but tool discovery is worth it.

**inbox_placer** (82 votes): Seed-list before full send. Non-negotiable for agent-triggered mail.


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