I have been a loyal digikey customer for past 7 years and there's nothing to complaint given the vast catalog including everything one can think of or not.
Being in Mumbai, a quick alternative is sometimes Lamington market but finding specific passive parts is difficult many times.
Recently I came across LCSC Electronics (seems like an Asian version/competitor of Digikey) which sells a lot of components at a great value specially passive components.
Here is a quick link to explore it: https://lcsc.com/en
Do let me know in comments if there are any more direct alternatives like this. Please spare local resellers, as using components regularly from them is not economically viable.