The best alternatives to GreptimeDB are Appwrite, NocoDB, and Coolify. If these 3 options don't work for you, we've listed a few more alternatives below.
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A secure open-source backend server provides the core APIs required to build web and mobile applications. Appwrite provides authentication, database, storage, functions, messaging, and advanced realtime capabilities.
NocoDB is an open source Airtable alternative. It transforms your relational databases into a smart spreadsheet. Our app store allows you to connect to any cloud services like S3 for file storage and 3rd party apps like Slack, Twilio for business workflows
Coolify is an open-source and self-hostable all-in-one (IaaS) solution to host your applications, databases, or other open-source services. It's an alternative software to Heroku and Netlify and other similar software out there.