Unfortunately, while I prefer apps like EyeEm (and I'm curious to check out Steller), the real reason that Instagram works for marketing is that it's also used by people who aren't photographers. So while you might be building a decent following on flickr or 500px, it's other photographers, who probably won't be looking to hire you to shoot their campaign/wedding. If on the other hand you're looking to make a name for yourself doing workshops/training for other photographers then maybe they're a perfect place to market yourself.
Users can upload images and videos and use them to tell a story using various layout templates. If you want to tell a story with a series of images, you can then add new videos or images before sharing them. These images can then be seen in the ‘storyline’ feed along with any other stories that a particular user follows. Other users can like and comment on posts in the exact same way as on Instagram, and can also share them to other social media platforms: as can you.
Although Vero is similar in many respects to competitors such as Facebook and Instagram (profile, structure, timeline, news feed), the platform offers some interesting unique selling points: The messages in the timeline are not pre-filtered by an algorithm, but appear in chronological order. Contacts can also be divided into four categories: 'followers', 'acquaintances', 'friends', and 'close friends'. These groups can then be selected or deselected as the target group when a post is published, so that only the desired audience is informed.
The two main ones I see are Micro.blog and Mastodon. Micro.blog is the more popular one right now, it seems, but Mastodon has its fair share of loyal fans. I personally have accounts with both other services, but I don’t really use them reliably. Mastodon because I can’t find anyone on there, and Micro.blog because I don’t like any of the iOS apps available for it.
A simple chat (slack style) it's enough. Just having the possibility to send messages either single user or team (#channel). But please don't forgive to give an useful appeal to mobile app (worst error of competitors is, have a good app but totally no mobile friendly!) i would expect to have a similar whatsapp or slack app for messaging within the slack mobile app!