What's the best email marketing platform for welcome sequences and lead nurturing with strong deliverability?

If your main goals are welcome sequences + lead nurturing + strong deliverability, the best choice depends a bit on whether you want simplicity, advanced automation, or sales/CRM integration.

Best overall picks

1) ActiveCampaign — best for lead nurturing and automation

• Excellent automation builder for welcome sequences and behavior-based nurturing
• Strong tagging/segmentation
• Good deliverability reputation when set up properly
• Best if you want more than basic newsletters

2) ConvertKit — best for creators/simpler funnels

• Very easy to set up welcome sequences
• Good automation for lead magnets and onboarding
• Clean interface, strong deliverability
• Best if you want simplicity over deep CRM features

3) Klaviyo — best for ecommerce

• Excellent for welcome flows, abandoned cart, post-purchase, and segmentation
• Strong deliverability for ecommerce use cases
• Best if you sell products online

4) HubSpot — best if you want CRM + email in one

• Good nurturing sequences tied to a full CRM
• Great if sales and marketing need to work together
• More expensive, but powerful

My short recommendation

• Most businesses / B2B lead nurturing: ActiveCampaign
• Creators / newsletters / simple funnels: ConvertKit
• Ecommerce: Klaviyo
• Sales-team-heavy companies: HubSpot

Deliverability tips

No platform guarantees inboxing. Deliverability depends heavily on:

• authenticating your domain with SPF, DKIM, and DMARC
• warming up new domains/IPs
• sending engaged leads first
• keeping lists clean
• avoiding spammy wording and bad acquisition practices

If you want, I can also give you:

1. a side-by-side comparison table, or
2. the best platform for your exact business type and budget.