Open source messaging and team collaboration platform — deployed on enterprise servers, globally Messages and files do not leave the internal system. Chat channel, direct messaging, file sharing, video calling and developer tool integration — without paying per user per month.
✓ No license / user fees · ✓ Messages & files saved in Vietnam · ✓ 24/7 Vietnamese support
The team is collaborating at
The entire solution is built entirely on the company's infrastructure (On-premise) and can operate with an independent storage system (Air-gapped). This is the optimal model to ensure data sovereignty, privacy and eliminate dependence on third-party Cloud providers thanks to 100% autonomy from hardware to software.
Most Vietnamese SME businesses are using personal chat tools or foreign SaaS for internal work — business data is out of your control.
Contracts, quotes, and customer information exchanged through personal apps mean that business data is located on foreign servers and on employees' personal phones. When an employee leaves, the entire exchange history is lost on their device.
Slack Pro costs ~ 180,000 VND/user/month. A 50-person business costs more than 9 million/month — more than 108 million/year just for a chat tool. Costs increase linearly as additional staff is hired — there is no stopping.
Free Slack only saves the last 90 days of messages. Important documents exchanged 6 months ago disappeared forever. Paid plans keep unlimited history — but you have to pay each month to "rent" your own data.
From channel messaging, file sharing, video calling to integration with GitLab, Jira and CI/CD pipelines — no need to pair multiple products from different vendors.
Organize conversations by topic channels — no more mixed messages in a single group. Public channels, private channels, direct messaging, and small groups — all in one interface.
Share files directly in the chat channel — images, documents, videos displayed inline. Instantly search through your entire message and file history — without time limits.
Make audio and video calls directly from chat channels or private messages — no need to switch to another app. Share your screen during a call for demos, support, and quick meetings.
Control exactly which notifications you receive — don't be inundated with irrelevant messages. Set a custom status to let colleagues know if you're busy or available.
Connect to all your workflow tools — get notifications from GitLab, GitHub, Jira, CI/CD pipeline right in the chat channel, no need to constantly switch tabs.
Complete control over your data — TLS encryption in transit, encryption at rest, full audit log, and data export for legal compliance requirements. LDAP/SSO integration for centralized access management.
All the power of an enterprise chat platform — no add-ons, no subscriptions to individual features.
Same group messaging feature — cost difference of hundreds of millions each year as the business grows larger. The data is here for you to judge for yourself.
| Comparison criteria | 🟦 NAD Chat ✦ Our recommendation | Slack | Microsoft Teams | Google Chat | Zoom Team Chat |
|---|---|---|---|---|---|
| 💰 License fee (50 users / month) | 0 ₫ | ~9.000.000 ₫ ~$7.25/user (Pro) | ~7.500.000 ₫ ~$6/user (M365 Basic) | ~7.500.000 ₫ ~$6/user (Workspace) | ~18.750.000 ₫ ~$15/user (+ Phone) |
| 💰 Cost / year (50 users) | ~0 ₫ ✦ Free license | ~109 million VND | ~90 million VND | ~90 million VND | ~225 million VND |
| 📍 Self-hosted / Internal data | ✓ Server at the enterprise | ✗ SaaS, US server | ✗ SaaS, Microsoft cloud | ✗ SaaS, Google cloud | ✗ SaaS, Zoom cloud |
| 📜 Unlimited message history | ✓ Unlimited, free | ✗ 90 days (free), paid to get enough | ✓ Yes (by package) | ✓ Have | ✓ Have |
| 📢 Public & private channels | ✓ Unlimited | ✓ Unlimited | ✓ Unlimited | ✓ Unlimited | ✓ Have |
| 🧵 Threaded conversations | ✓ Full | ✓ Full | ✓ Full | ◐ Limitations | ◐ Limitations |
| 🎥 Video calling & screen sharing | ✓ Built-in, free | ✓ Huddles (Pro and above) | ✓ Completeness (strength) | ✓ Google Meet integrated | ✓ Zoom Meetings integration |
| 🔌 Webhooks & Custom bots | ✓ Complete, free | ✓ Full | ✓ Power Automate | ◐ Limitations | ◐ Limitations |
| 🏢 Integrated LDAP/SSO | ✓ Built-in, free | ✓ Enterprise plan only ($) | ✓ Azure AD integration | ✓ Google Workspace | ◐ Basic SSO |
| 📝 Audit Log & Compliance Export | ✓ Complete, free | ✓ Enterprise plan only ($) | ✓ Enterprise plan only | ✓ Google Vault (additional fee) | ◐ Limitations |
| 📱 App Desktop & Mobile | ✓ Windows, Mac, Linux, iOS, Android | ✓ Full | ✓ Full | ✓ Full | ✓ Full |
| 🔓 Open source / No vendor lock-in | ✓ MIT License, self-hosted | ✗ Proprietary | ✗ Proprietary (Microsoft) | ✗ Proprietary (Google) | ✗ Proprietary (Zoom) |
| ∞ Unlimited number of users | ✓ Free of all sizes | ✗ Charge per user | ✗ Charge per user | ✗ Charge per user | ✗ Charge per user |
| 🇻🇳 Vietnamese language & Vietnamese legal support | ✓ Powered by NAD Solutions | ✗ English, different time zone | ✗ English | ✗ English | ✗ English |
| 🏆 Total rating for Vietnamese SME | ★★★★★ Most optimal for SMEs | ★★★★☆ Good but expensive, data on US server | ★★★★☆ Good in the Microsoft ecosystem | ★★★☆☆ Need the entire Google Workspace | ★★☆☆☆ Most expensive, focuses on video calls |
Our chat platform is MIT licensed — completely free for commercial use. You only pay for the deployment service once.
The MIT open source license allows any business to use it for commercial purposes completely free of charge — no limit on the number of users, no time limit, no strings attached.
Slack charges an additional ~180,000 VND/person/month each time you recruit. With the self-hosted system, even though the team increases from 10 to 1,000 people - the license bill is still 0 VND.
Messages, files, communication history are saved on your server — never deleted because the free package expires. Don't worry about data leaking out or depending on Slack/Teams uptime.
The API and webhook format are compatible with Slack — most of your existing integrations run out of the box without needing to modify code. Migrate to self-hosted without interruption to the development team.
Compare license costs for 50 employees / year
* Calculated for 50 users, exchange rate ~25,000 VND/USD. One-time implementation costs are calculated separately and are usually paid back in 3–6 months.
"We are paying Slack Pro for 60 people — over 10 million/month. After switching to an internal chat system deployed by NAD, the cost went to zero and the entire integration with GitLab CI/CD still runs normally because the API is Slack compatible. ROI was achieved in the first month."
"The board of directors' request is not to use Zalo or personal apps for internal communication because of the risk of leaking contracts and customer information. The self-hosted chat system allows us to control all data, fully audit log and not worry about messages being accessed from outside."
"Previously used Telegram for the entire production team of 200 people - mixed messages, couldn't find history, couldn't manage which channel was internal or customer. The new chat system with hierarchical channels by factory and line, instant full-text search, set up in 1 day and can be used immediately."
Standardized, transparent process — all employees switch without interruption, message history is fully migrated if necessary.
Survey the team, determine the channel structure by department and project, make a list of necessary integrations (GitLab, Jira, CI/CD...) and plan the migration from Slack/Zalo/Teams.
Deploy on internal server or Private Cloud, configure SSL/TLS, LDAP/AD connection, set default channel, notification policy and group permissions.
Connect webhooks to GitLab, GitHub, Jira, CI/CD pipeline. Migrate message history from Slack if needed. Test all integrations before going live.
Instruct employees to install apps on computers and phones, set up personal notifications, hand over operational documents to IT admin and support the transition period.
Pay once for deployment & integration services. After that, the entire chat system is yours — no subscriptions, no monthly licenses.
Suitable for teams of up to 50 people who want to leave Zalo/Telegram and switch to an internal professional chat platform.
Full enterprise features — LDAP/AD integration, video calling, developer tool webhooks, and compliance export.
High availability, migrate from Slack/Teams with full history, long-term managed operations and complex system integration.
✦ Committed to transparency: No hidden license fees. No monthly subscription. No annual renewal. After deployment, the entire chat system belongs to you — royalty-free forever.
Receive free advice on implementing an internal chat system. We analyze your current workflow, recommend the optimal channel structure, and provide a detailed quote — completely free, with no obligations.