Look guys, its cool you're building this and all that, but please skip the whole Bloomberg comparison thing because you're only embarrassing yourself.
I've had a fair bit of involvement with Financial IT over the years, and let's just be honest here. Bloomberg has no real competitors. For fixed-income (bonds etc.), Bloomberg is unparalleled. For everything else they have a vast and largely un-paralleled dataset.
The nearest two real competitors to Bloomberg are Refinitiv (a.k.a. Reuters) and FactSet.
Of those two, Refinitiv are the nearest to Bloomberg. But despite having spent many millions of dollars chopping and changing their product, they still don't have feature parity with Bloomberg. Eikon is a great product for sure, and if you're not trading fixed-income products then it will likely serve you well enough.
FactSet lags behind Refinitiv. Its very much an equities focused product. Its not that bad, but still third-place.
And that's it for the top tier. You have a few interesting players in the second tier (e.g. CapitalIQ and Infront). They do the job for people who can't afford top tier but still want quality.
Beyond that, let's be frank, you start wading into the swamp of Bloomberg "killers" who are anything but.
One of the main problems at swamp level is the lack of coverage. Generally you will find US data, maybe some Canadian, but beyond that you can generally forget about data outside North America, and if there is any, it will generally be limited and of low quality.
Good data costs money. There's no escaping that fact. And that's why the top-tier financial vendors charge $$$$.