>More and more large companies and startups are adopting Nim.

Ineresting.

Are there any stats / data on this, or is it anecdotal?

Even if anecdotal, can you name some names?

For startups, you can count us in[1]. Our backend, across all services, is using Nim. [1] https://cxplanner.com

What's the experience of writing web backend with Nim ? Did you use existing libraries / framework ? How good is the concurrency compared to something like Go ?

One of the reasons for choosing Nim was the ease of getting a production ready web backend. For the core part of managing the backend we are using existing Nim libraries [1], and they are easy to expand and work with. I cannot give you a comparison with Go since I haven't managed that large Go projects - but for Nim we are all into the async and threading. I think the channels within the threading is hardest part in Nim, but work is being done it.

[1] https://nimble.directory [1a] https://github.com/dom96/jester/ [1b] https://github.com/planety/Prologue [1c] https://github.com/guzba/mummy

Thanks