Open-Source Alternatives to SendGrid / Customer.io
Based on our dataset, the self-hostable open-source alternatives to SendGrid / Customer.io are Dittofeed / Postal. The SendGrid / Customer.io plan we benchmark is Pro ($90-$150/mo transactional & drip journeys).
Data last updated . How we check.
Quick comparison
| Alternative | License | RAM in starter config | Needs Postgres / Redis | Migration |
|---|---|---|---|---|
| Dittofeed / Postal | MIT | 512 MB | Yes / No | Easy |
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
Docker image dittofeed/dittofeed-lite:latest. GitHub: dittofeed/dittofeed (2.9k stars when our data was last updated). Website: https://www.dittofeed.com
Switching from SendGrid / Customer.io
- Pick an alternative above and open its comparison page for the cost breakdown.
- Generate a free starter
docker-compose.ymlin the stack builder. - Test it on a small server with a copy of your data before moving the team over.
- Check the migration notes in the table, and the official docs of the tool you pick.
More detail: Replace SendGrid / Customer.io guide.
FAQ
What are the open-source alternatives to SendGrid / Customer.io?
In the StackSwitcher dataset, the self-hostable open-source alternatives to SendGrid / Customer.io are Dittofeed / Postal.
Which SendGrid / Customer.io plan does StackSwitcher compare against?
We benchmark SendGrid / Customer.io Pro ($90-$150/mo transactional & drip journeys). The main pain point we note: Steep monthly minimums for behavioural email automation and multi-channel push/SMS workflows.
How much RAM does Dittofeed / Postal need when self-hosted?
Our starter Docker config budgets 512 MB of RAM for Dittofeed / Postal plus Postgres. Real needs depend on your usage.
Config templates are MIT licensed and provided "AS IS", with no warranty of any kind and no liability. Prices and specs are informational estimates from our dataset, so check the vendor and project sites before you decide. See the Terms & No Warranty disclaimer.