These are entries that were almost up for being in the main readme but I've decided they are not developer-first or aren't as awesome as the other entries.
- Amplitude - Has good analytics APIs, directly measure KPIs. [Not developer-first enough]
- Scanbot SDK - Structured data extraction from images for applications. [Not developer-first enough]
- Dashbird - Serverless realtime monitoring. [Not developer-first enough]
- LogDNA - Log management and alerts. [Not developer-first enough]
- instatus - Minimalist Jamstack status page. [Not developer-first enough]
- Statuspal - Public/Private status pages for services with integrations. [Not developer-first enough]