Klaviyo
klaviyo.com
Email and SMS built around e-commerce data
from $20/moFree plan
Brevo
Email, SMS and chat on one affordable plan
Free plan availableEmail MarketingSince 2012
from $9/moVisit brevo.com
What Brevo is
Formerly Sendinblue. Combines marketing email, transactional sending, SMS, live chat and a light CRM. Pricing is send-volume based rather than contact based.
People use it to
Current offers
Free plan
Free plan, no card required
Ongoing free tier published by the vendor. Limits vary by plan.
Brevo alternatives
Other tools in email marketing that cover similar ground. Full comparison.