Klaviyo
klaviyo.com
Email and SMS built around e-commerce data
from $20/moFree plan
Loops
Simple email for software companies
Free plan availableEmail MarketingSince 2022
from $49/moVisit loops.so
What Loops is
Marketing and transactional email in one place with a deliberately small surface area — campaigns, loops (sequences) and an API, without the enterprise sprawl.
People use it to
Current offers
Free plan
Free plan, no card required
Ongoing free tier published by the vendor. Limits vary by plan.
Loops alternatives
Other tools in email marketing that cover similar ground. Full comparison.