SendInBlue is a very budget-conscious email marketing service and it has a very generous free plan.
They have pretty decent automation options, but their integrations are limited. There is also a sending limit on the free plan.
SendInBlue is best for small businesses and agencies.
Their pricing is based on how many emails you're sending, not amount of subscribers:
- 300 emails/day: Free!
- 40,000 emails/day: $25/month
- 60,000 emails/day: $39/month
- 120,000 emails/day: $66/month