I would like to gather information on how you migrate your HipChat instance to Mattermost (tools, roadblocks, suggestions). I came across these so far.
- Hipmost - https://github.com/orbitalimpact/hipmost
- HC2MM - https://github.com/herzum/HC2MM
- Migratemost - https://github.com/ergon/migratemost
Can you share any other tools that you may have tested successfully and your story / article here? For example, Normalize HipChat usernames article that was written by @jby is really helpful for admins who may run into issues with the usernames.