Best for Transactional Email
Reliable APIs and SMTP for sending receipts, password resets, and one-to-one notifications.
Last updated: July 28, 2026 · Real-time pricing data
#1
🐝
BeeHiiv
Professional newsletter platform for creators
Free plan
3.9★
· 12 plans
Top features: Segmentation · Email Builder · AI Support · Analytics
#2
🪶
Mailer Lite
Easy email marketing with affordable pricing
Free plan
3.8★
· 4 plans
Top features: Automation · Segmentation · Analytics · GDPR
#3
📩
Brevo
Email, SMS & WhatsApp marketing in one platform
Free plan
3.8★
· 5 plans
Top features: Automation · Segmentation · AI Support · Analytics
#4
🚀
Active Campaign
Marketing automation platform with built-in CRM
From $391/mo
3.8★
· 4 plans
Top features: API · Automation · A/B Testing · Segmentation
#5
🛍️
Klaviyo
Revenue-focused marketing for e-commerce brands
Free plan
3.6★
· 52 plans
Top features: Automation · Email Builder · SMTP · A/B Testing
#6
💧
Drip
E-commerce email marketing with revenue attribution
From $39/mo
3.6★
· 47 plans
Top features: SMTP · A/B Testing · AI Support · SPF/DKIM
#7
📨
AWeber
Email marketing for entrepreneurs and small businesses
From $15/mo
3.6★
· 25 plans
Top features: API · SMTP · SPF/DKIM · Dedicated IP
#8
📧
Elasticemail
Affordable transactional and marketing email API
Free plan
3.5★
· 46 plans
Top features: Email Builder · Dedicated IP · A/B Testing · Segmentation
#9
📧
Mail250
Cost-effective email marketing for small businesses
From $20/mo
3.5★
· 4 plans
Top features: SMTP · Automation · Email Builder · AI Support
#10
🎯
Constant Contact
Email marketing for small businesses with rich templates
From $12/mo
3.5★
· 39 plans
Top features: API · SMTP · A/B Testing · Segmentation