CRM, Marketing & Scheduling
Top 1 Self-Hosted Open-Source Alternatives to SendGrid / Customer.io (2026)
SendGrid / Customer.io costs Pro ($90–$150/mo transactional & drip journeys) ($90/mo or $1,080/year for 10 seats). Switch to one of the verified open-source Docker replacements below.
★ 2.9k Stars • MIT
512MB RAM / 1.0 vCPU
Dittofeed / Postal
Open-source omnichannel customer engagement (Customer.io alternative) + self-hosted mail delivery server
- ✓Visual event-triggered user journeys
- ✓Connects to Amazon SES ($0.10 per 1,000 emails)
- ✓100% MIT licensed
dittofeed/dittofeed-lite:latest
TCO & Docker Compose →