Hey @mouse77,
you’re asking great questions – it’s clear you’re genuinely interested in how everything fits together, and that’s the best mindset to have 
Yes – Full Nextcloud suite on a VPS
If you install Nextcloud (either with Nextcloud AIO or a manual Docker setup), you’ll get access to the full suite:
- File syncing and sharing
- Calendar, Notes, Tasks, Mail
- Nextcloud Office (Collabora or OnlyOffice integration)
- Audio/video chat via Talk
- Automation workflows, team collaboration tools, mobile apps – everything you’d expect from a modern cloud solution, but open-source and under your control.
VOIP / phone numbers?
Nextcloud doesn’t offer virtual phone numbers or traditional VoIP services like Twilio or Google Voice.
However, it does include Talk, which supports team chat, audio/video calls, and screen sharing – great for internal communication or small team meetings.
Automated workflows (Nextcloud Flow)
This is like an “if-this-then-that” system:
- For example: “If someone uploads a file into folder X, tag it and move it to folder Y.”
- Or: “If a file is older than 7 days, notify someone.”
It’s a super handy feature when combined with other apps like Tags, Group folders, or PDF converters.
CRM?
Nextcloud offers some basic CRM-like tools such as Contacts, Notes, Deck (kanban board), Forms, and Collectives (wiki-style docs).
It’s not a full-fledged CRM, but it can work for smaller workflows or minimal setups. Since you’ve already purchased a dedicated CRM, you’re covered – but it’s still interesting what’s possible with open source.
What about Docker?
Docker is a way to run applications in isolated containers that include all their dependencies.
Nextcloud AIO uses Docker and is currently one of the most convenient ways to get a full-featured Nextcloud up and running.
But it’s not as plug-and-play as some claim – it still requires learning:
- How containers work
- How networking and volumes are managed
- How to handle updates and backups
It’s not overly complex, but it does require some technical curiosity and time investment. Definitely worth it if you enjoy learning new things.
My own setup – self-hosted at home
Personally, I went with a self-hosted setup at home.
Yes, the initial hardware cost was higher (for a mini server and storage),
but now my monthly cost is basically just electricity.
I don’t count my internet connection, since I’d be paying for that anyway.
What I gained: complete control over everything. And I use the same machine to run several other open-source services, like Paperless-ngx (document management), Rocket.Chat, and MeshCentral (remote access).
It’s a great way to build your own private cloud ecosystem.
VPS vs Cloud hosting?
- VPS gives you dedicated CPU, RAM, and storage – you manage the system yourself. Perfect for Nextcloud.
- Cloud hosting (like AWS or Google Cloud) is more abstracted, scalable, and powerful – but also more expensive and complex. Often used in corporate or high-availability environments.
Nextcloud is a brilliant solution if you like the idea of having everything in one place – files, office tools, collaboration – without depending on the big tech giants.