Zioan vs Slack: Self-Hosted Workspace vs Cloud Chat
Cloud-based team messaging with channels, DMs, and integrations. Owned by Salesforce.
What this comparison covers
Slack is the default team chat app for thousands of companies. It handles messaging, channels, and integrations well. But it's only chat — you still need separate tools for documents, project management, and CRM.
Zioan is a self-hosted workspace that combines chat, documents, kanban boards, CRM, calendars, code snippets, and guest portals in one application. Everything runs on your server, with a one-time license fee instead of per-seat monthly billing.
This page compares the two across features, pricing, data ownership, and team fit so you can decide which makes sense for your situation.
Feature Comparison
| Feature | Slack | Zioan |
|---|---|---|
| Real-time chat | Yes — channels, DMs, threads | Yes — channels, DMs, threads, forwarding |
| Audio/video calls | Huddles (no screen sharing on Free) | Yes — calls with screen sharing, self-hosted media |
| Message history | 90 days on Free, unlimited on paid | Unlimited on all plans |
| File sharing in chat | Yes (storage limits per plan) | Yes — unlimited, stored on your server |
| Documents / Wiki | No — requires Notion, Google Docs, etc. | Yes — rich-text editor, version history, import from MD/PDF/DOCX |
| Kanban boards / Tasks | No — requires Asana, Jira, etc. | Yes — boards, time tracking, checklists, labels, story points |
| CRM | No — requires HubSpot, Salesforce, etc. | Yes — contacts, follow-ups, custom fields, email templates |
| Calendar | No — relies on Google/Outlook Calendar | Yes — events, task deadlines, reminders, space-level views |
| Code snippets | Code blocks in messages (no editor) | Monaco editor, 18 languages, version history, visual diff |
| Guest portals | Guest accounts (count as paid seats on some plans) | Branded portal, granular permissions, unlimited guests at no cost |
| Global search | Chat messages only | Cross-platform: chat, docs, tasks, boards, snippets |
| AI integration | Slack AI (included in Business+ and above) | MCP server — works with Claude, ChatGPT, Gemini across entire workspace |
| Self-hosted option | No — cloud only | Yes — Docker on any Linux server |
| Data ownership | Salesforce controls your data | 100% on your server, zero vendor access |
| GDPR compliance | Shared responsibility model | Full control — host in EU, your data never leaves your server |
| SSO / SAML | Business+ and above ($15/user/month) | Not currently available |
| Integrations ecosystem | 2,600+ third-party apps | Git (GitHub, GitLab, Bitbucket), Sentry, MCP for AI tools |
Chat: both strong, different models
Slack's chat is mature and polished. Channels, threads, emoji reactions, message pinning, and app integrations all work well. The ecosystem of third-party integrations is massive — over 2,600 apps connect to Slack.
Zioan's chat covers the same ground: channels, DMs, threads, reactions, pins, file sharing, and mentions. It also adds audio and video calls with screen sharing, where all media stays on your infrastructure. The key difference is that Zioan's chat is connected to everything else — reference a task in a message, link a document to a channel, or forward a thread to another conversation. There's no switching between apps.
Beyond chat: where Zioan goes further
Slack is a communication tool. It does messaging well, but your team still needs separate apps for documents (Notion, Google Docs), project management (Asana, Jira), CRM (HubSpot, Salesforce), and calendars (Google Calendar). That means multiple logins, multiple billing dashboards, and context scattered across tools.
Zioan bundles chat, documents, kanban boards, CRM, calendars, code snippets, and guest portals into one application. Everything shares one database, one search (Cmd+K), and one permission system. When someone mentions a task in chat, you can click through to the board. When you write a document, you can link it to related tasks and discussions.
Data ownership and hosting
Slack is cloud-only, operated by Salesforce. Your messages, files, and workspace data live on Salesforce's infrastructure. You can export data, but you can't run Slack on your own servers.
Zioan runs on your server via Docker. Your data never leaves your infrastructure. For teams that need GDPR compliance, you can host in the EU (Zioan offers managed hosting in Germany) and maintain full control over data access, retention, and deletion.
Integrations: ecosystem vs. depth
Slack wins on breadth — 2,600+ integrations cover almost every SaaS tool. If your workflow depends on connecting dozens of specialized apps, Slack's marketplace is hard to beat.
Zioan takes a different approach. Instead of connecting to external tools, it replaces them. Git integration (GitHub, GitLab, Bitbucket) and Sentry integration are built in for development teams. The MCP server gives AI assistants (Claude, ChatGPT, Gemini) full context across your workspace — not just chat, but tasks, documents, and CRM data.
Who Slack is better for
Slack is a better fit if your team relies heavily on third-party app integrations, needs SAML SSO on the chat layer, or has already built workflows around Slack's automation tools. Large organizations with established Salesforce contracts may also benefit from the tighter Salesforce-Slack integration.
Who Zioan is better for
Zioan makes more sense if you want one app instead of five, need to own your data, prefer a one-time payment over per-seat monthly fees, or work with clients who need a branded guest portal. Development teams especially benefit from built-in code snippets, Git integration, and AI-native workspace access via MCP.
Pricing
Slack
Free plan with 90-day message history. Pro: $7.25/user/month (annual). Business+: $15/user/month (annual). Enterprise: custom pricing.
Zioan
€999 one-time payment. Unlimited users and guests. All features included.
The bottom line
Slack is excellent at what it does — team messaging. But it's only one piece of the puzzle. Most teams using Slack also pay for Notion ($10/user/month), Asana or ClickUp ($7-13/user/month), and possibly a CRM. A 10-person team can easily spend $300/month or more across these tools.
Zioan replaces all of them with a single self-hosted application for a one-time payment of €999. Your data stays on your server, your team gets one search and one login, and you stop paying monthly rent on tools you depend on every day.
If you need the app ecosystem Slack offers, Slack is the right choice. If you want fewer tools, full data ownership, and a predictable cost, try Zioan's 30-day free trial.