I need a provider that can handle transactional email and a little lifecycle marketing. What should I use?

If you need transactional email first, with some lifecycle marketing on top, I’d usually point you to one of these:

Best fit for most teams: Customer.io

• Strong for transactional + behavioral/lifecycle messaging
• Good segmentation and automation
• Can handle email plus other channels if you expand later
• Better choice if you want messaging triggered by product/user actions

Best fit if you want simpler all-in-one sending: SendGrid

• Excellent for transactional deliverability and scale
• Has basic marketing features, but lifecycle automation is more limited
• Good if transactional email is the main need and marketing is light

Best fit if you want more marketing automation: Mailchimp / Klaviyo

• Better for lifecycle/marketing workflows than pure transactional
• Usually not my first pick if transactional email is mission-critical
• Klaviyo is especially strong for ecommerce

Best fit if you want developer-first with good transactional focus: Postmark

• One of the best for transactional deliverability
• Very clean, simple product
• Lifecycle marketing is minimal, so you’d likely pair it with another tool

My practical recommendation

• If you want one tool for both transactional and light lifecycle: Customer.io
• If you want best transactional reliability and only modest marketing: Postmark + a marketing tool
• If you want lowest-friction SMTP/API email with some marketing: SendGrid

If you tell me:

1. your company type,
2. approximate email volume, and
3. whether you need only email or also SMS/push,

I can narrow it down to the best 1–2 options.