Top Choice
SendGrid
4.1
•SCALE · APIEmail API and SMTP relay for developers
Free (up to 1,000 subs)
Free plan option available
SMTP relay & high-deliverability API
Customer.io
4.5
•BEHAVIOURAL · SAASBehavioral email automation for products
From $100/mo
Powerful behavioral triggers based on product events
Omnichannel outreach: Email, push, SMS & in-app
Brevo
4.5
•MARKETING + TRANSACTIONALAll-in-one platform with unlimited contacts and SMS marketing.
Free Plan Available
Free plan with unlimited contacts (300 emails/day)
All-in-one CRM, SMS marketing & web chat
Buttondown
4.7
•NEWSLETTER · CREATORSMinimalist, Markdown-first newsletter platform for writers and creators.
Free (up to 100 subs)
Free plan up to 100 contacts
Marketing automation & segmentation
Twilio SendGrid (Advanced)
4.2
•ENTERPRISE · APIEnterprise email API for high-volume senders
From $89.95/mo
Starting paid tiers from $89.95/mo
SMTP relay & high-deliverability API
Vero
4.2
•BEHAVIORAL · EVENT TRIGGEREDEvent-triggered email for product and data teams
From $99/mo
Starting paid tiers from $99/mo
SMTP relay & high-deliverability API
Netcore Email
4.1
•ENTERPRISE · DELIVERABILITYEmail API and marketing for enterprises
Contact Sales
SMTP relay & high-deliverability API
Elastic Email
3.9
•AFFORDABLE · BULKAffordable bulk email API and marketing
Free (up to 1,000 subs)
Free plan option available
SMTP relay & high-deliverability API