First of all I had no idea tf2metrics existed, but it looks really cool!
There seem to be a few differences though.

• TF2metrics gives rankings for individual players as well as teams. I only give rankings for teams.
  
• TF2metrics' match predictions give an expected score for each team while I give a probability of each team winning. This is sort of a nitpick point though...
  
• Also TF2metrics doesn't seem to give weekly playoff chance predictions, while TF2Elo will.

It will be interesting to see how the different ranking/prediction systems perform over the season.

Awesome, thanks! I updated the site to reflect TFCrew's score from last season.

I found an issue with how I was handling ties in the simulation, which lead to teams with the same elo having wildly different chances of making playoffs. That has been fixed.

A couple questions though:
Is TFCrew the same(ish) roster as The Sparkle Gang from last season?
And is the Feint gaming roster completely new?

Thanks! I got the idea from 538's sports predictions (https://projects.fivethirtyeight.com/2018-nba-predictions/)

I created a project for predicting the outcomes of ESEA Invite matches. For each team in Invite I calculate an Elo score. This lets me get a probability of a team winning a given match. Additionally I simulate out the rest of the season to get the chances of each team making the playoffs.

The project can be found here: https://tf2elo.com
I will update it weekly with predictions for the next week's matches.

To get the starting Elo scores I used the results of last season. New teams start with a score of 1500.
Currently the ELO scores have not stabilized yet, as the season hasn't started yet. As such the probabilities are fairly conservative, being closer to a 50/50 outcome.