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It's interesting to compare Slack's tech stack vs Discord. The tech stack of slack is pretty common, while the tech stack of Discord is very geeky: Elixir/Rust

It's interesting to compare Slack's tech stack vs Discord. The tech stack of slack is pretty common, while the tech stack of Discord is very geeky: Elixir/Rust + Cassandra for crazy high concurrency, and React/React Native for fast developing and consistent experience. Like LAMP for Slack, Discord also used MongoDB prototyping in the first few years, but while they prototyping they prototype in a manner they can easily migrate to Cassandra later. Then they successfully migrated to Cassandra. This is brilliant. I remember the React community migrated from Slack to Discord[0], I guess one of the reason could be the performance. According to the blog, at that time the team only have "14 people full time", which means they've got a very high velocity, amazing. I didn't find any summary of their whole tech stack but there are several insightful articles from their blog like[1]. [0] https://reactjs.org/blog/2015/10/19/reactiflux-is-moving-to-discord.html https://reactjs.org/blog/2015/10/19/reactiflux-is-moving-to-... [1] https://blog.discordapp.com/how-discord-stores-billions-of-messages-7fa6ec7ee4c7 https://blog.discordapp.com/how-discord-stores-billions-of-m...

MuffinFlavored 7y ago
How many more users/how much more traffic does Slack have than Discord...?
- namelosw 7y ago
  Probably the hard part is not about overall traffic. If Slack have a billion channels, while every channel only has 10 to 1k users, it's much easier than say, if Discord having a million channels while some channel having 100k users. If you thinking in algorithmic complexity. I'm pretty sure the Reactiflux channel exceeded 50k long time ago.
  - acemarke 7y ago
    We've done a few purges of inactive users over time, so the number of "total members" has done the usual garbage-collection sawtooth graph shape. Looking at the server right this second, I see 2800 online, and 72.5K total members.
ec109685 7y ago
Slack uses Elixir for their auto and video conferencing as well.
acemarke 7y ago
I'm an admin on Reactiflux (although at the time of the switch from Slack to Discord, I had just joined as a newbie). We got kicked off Slack because we got up towards 10K users signed up, and Slack locked us from having any more people join. Clearly, we weren't a good fit for their business model. Worked out well for us - we've loved Discord ever since we switched over!
- namelosw 7y ago
  This is So cool! Reatiflux is one of the most energetic community I have ever seen. Every time I use Slack I found the business model is not as generous as Elixir - there are too many constraints for free users/organizations.

MuffinFlavored 7y ago

How many more users/how much more traffic does Slack have than Discord...?

namelosw 7y ago
Probably the hard part is not about overall traffic. If Slack have a billion channels, while every channel only has 10 to 1k users, it's much easier than say, if Discord having a million channels while some channel having 100k users. If you thinking in algorithmic complexity. I'm pretty sure the Reactiflux channel exceeded 50k long time ago.
- acemarke 7y ago
  We've done a few purges of inactive users over time, so the number of "total members" has done the usual garbage-collection sawtooth graph shape. Looking at the server right this second, I see 2800 online, and 72.5K total members.

ec109685 7y ago

Slack uses Elixir for their auto and video conferencing as well.

acemarke 7y ago

I'm an admin on Reactiflux (although at the time of the switch from Slack to Discord, I had just joined as a newbie). We got kicked off Slack because we got up towards 10K users signed up, and Slack locked us from having any more people join. Clearly, we weren't a good fit for their business model. Worked out well for us - we've loved Discord ever since we switched over!

namelosw 7y ago
This is So cool! Reatiflux is one of the most energetic community I have ever seen. Every time I use Slack I found the business model is not as generous as Elixir - there are too many constraints for free users/organizations.