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privacytools.io
Discontinued 🛡🛠 You are being watched. Protect your privacy against global mass surveillance.
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
Have a look at privacytools.io where you can find recommended email services and many more.
mailbox.org, protonmail.com, or self-hosted.
If you like self-hosting and want full control over everything, Mailcow is great, although you'll need to use a third-party service like SMTP2Go to get good delivery of outbound emails.
NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a more popular project.