@janat08, sorry, I can’t get, what are you talking about. Do you mean that every online IDE is not good for Meteor? Or just C9? Please clarify.
I have never used Codenvy for my work, just evaluated it and found that C9 better fits my needs. I used both free and paid tiers, both in Chrome and in Meteor - work perfectly with Meteor projects, has node debugger, eslint and git support (which look nice). VMs that they provide withing free tier are enough to run full featured Meteor app - one app, if you want to run several apps simultaneously you should consider to switch to SSH attached server or to the paid tier.
After some time I have realized that I can use C9 installed locally (or on my server) keeping most of the features (all, but c9.io auth) and switch to the local installation. I have even ran C9/Meteor/Mongo all locally installed on my Android ARM tablet (proof) - IDE runs fine, but Meteor is rather slow for sure, but it was completely usable with external keyboard/mouse paired.