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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.
Aside from BlueSky's eloquently put advice, there are certainly things you can do. I have built many amazing sites using only free plugins (when I first started out and was poor) You just have to search for what you need. Google is your friend. Search for "free elementor header" and you will find this https://wordpress.org/plugins/header-footer-elementor/
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.