AGPLv3 versus MIT Expat + open core for one thing

https://github.com/openobserve/openobserve/blob/v0.12.1/LICE...

https://github.com/SigNoz/signoz/blob/v0.56.0/LICENSE

For one thing - From their website - Our powerful ingestion engine has a proven track record of handling 10TB+ data ingestion per day.

OpenObserve clusters can ingest PBs of data every day. While more can be discussed - I would rather focus on what are your needs when it comes to observability. Let's talk about them. I will be more excited to answer those questions.