Laudspeaker looks very useful but also a bit underbaked. For enterprise settings, you may want to consider its segmentation and journey capabilities in the context of orchestrating a suite of other tools that already are available. In our case, I’d love to use both of those features but would need native Snowflake integration and would want the Laudspeaker tools to integrate with Dagster/Airflow for deployment purposes. We have hundreds of millions of active users and send tens of billions of messages annually, across 17 or so channels, many of which are custom. The docs leave me wondering how I could integrate the tool with our existing infra.

Another open source marketing automation product is Mautic: https://www.mautic.org/

Not sure how they compare though

I wish that companies who use these tools would be more honest about them - i.e. I'd be much happier if the emails acknowledged that they are automated, and not a personal email from the CEO...