- It's pretty much what I was looking for. Nice find, me! 😼Available as a Chrome extension or a bookmarklet for other browsers, Hypothes.is allows you to highlight and annotate parts of a web page, and either share your annotations publicly, in a private group, or keep them to yourself. The web pages annotated are ordered by date in the interface, and can be filtered with the tags used in the annotations themselves. It doesn’t provide a way to notify your team when you annotate a web page, as far as I know, so you’d still have to use Slack for that. I haven’t used it a lot yet, but it seems to do the job. It’s not a perfect fit for your need, but probably one of the closest right now.
- Slack has grown into a behemoth of a company. It has a very good web based view that allows you to collaborate with your team(s) and add/share files, as you request. You can then comment on them in private as the Slack conversations work on an invite only basis. Primarily a messaging platform, but can work well for your scenario. You noted in your question details that you are already using Slack, so why not use that the whole way?
As a remote designer, this is a must have. I'm always contactable and available. Super easy way to also have quick calls and communicate with other team members on different teams.
I'm a part of a ton of Slack communities but I'm active in only a handful.
Slack works to its fullest only when it is implemented in a team and everyone's supposed to use it for communication. Slack could/should improve on making the communities on it better by adding relevant features.
- For serious privacy features and, to use your own actual server for the platform being hosted, I would suggest Mastodon.social ; It's served over private servers.. can't get any more security than that.. I mean.. You could literally start your own Mastodon instance and then only invite people you want and have all the features of Mastodon baked-in by forking @ https://github.com/tootsuite/mas... From what I see you can't get anymore private than that - communication happening on a server you physically own... However, if you aren't familiar with how to secure your own private server, then this is not an option for you... But, you could essentially just pay https://www.ionic.com/ to secure your own private physical server in your home/elsewhere if you're trying to be serious about your security.
- If you're happy to pay, try Declara. We had it earlier to organise content to be posted categorically and discuss specific issues in hand related to a topic. Later, we found it expensive for us and moved to an in-house (not-that-featureful, but private) solution.
- We used this when I was a finalist in The Startup Games in London. It allowed us to have access to a social network that only we could see. We could share documents, and it was pretty similar to Facebook in terms of functionality. You could then create sub groups so that particular teams could work together. It worked very well and was on an invite basis.
- I highly suggest you look into BoostHQ. Share any content by uploading or by shareable link and share it into specific channels that have specific team members invited to the channels. Channels can be private (only people in that channel can view the content) or public. Comment, bookmark, like or even create a poll or checklist on the content piece!