Intranet
Internet is something that is wide spread and but what if it contracts and has information only about you and your firm and is accessible to only authorized members of your organization this is where an intranet comes into existence. An Intranet looks and acts like a website but the difference arise at point that there exists a firewall that fends off unauthorized access. Their main use arises for sharing of information and is much less expensive to build and manage than private networks based on proprietary protocols.

An intranet is a private network that is contained within an enterprise. It may consist of many interlinked local area networks and also use leased lines in the wide area network. Typically, an intranet includes connections through one or more gateway computers to the outside Internet. The main purpose of an intranet is to share company information and computing resources among employees. An intranet can also be used to facilitate working in groups and for teleconferences.
An intranet uses TCP/IP, HTTP, and other Internet protocols and in general looks like a private version of the Internet. With tunneling, companies can send private messages through the public network, using the public network with special encryption/decryption and other security safeguards to connect one part of their intranet to another.Typically, larger enterprises allow users within their intranet to access the public Internet through firewall servers that have the ability to screen messages in both directions so that company security is maintained. When part of an intranet is made accessible to customers, partners, suppliers, or others outside the company, that part becomes part of an extranet.
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Advantages of Intranet

Ease of Publication: Intranet is very useful for publishing information in the organization internally.
Cost: In comparison to other Software packages Intranet is not expensive
Usability: Many users already have Web Browsers and have the ability to access the internal web sites easily.
Maintainability: The maintenance factor in intranet plays a very important role as all the data is placed right there at one place and it does not create a hassle to update the existing information or to add new.

Extranet
Intranet is useful only for the members of one single organizations but if the reach of intranet extends to members outside then that refers to extranet. But ‘outside’ we mean an extranet provides various levels of accessibility to outsiders (suppliers, vendors, partners, customers). An extranet is accessible only if the user has a valid username and password. His identity determines which parts of the extranet he can view. Extranets can be viewed as a very popular means for business partners to exchange information.

Webtech Softwares Web-based collaboration service provides a low cost, user-friendly intranet and extranet solution with added enhancements to traditional intranets and extranets.
Integrated Intranet and Extranet. HyperOffice's intranet and extranet functionality is integrated into a comprehensive product suite.
Unlimited Intranet and Extranet Portals. Create unlimited portals within your intranet or extranet. Great for departments, remote offices, customers, and distributed workforces!
No Servers or VPNs Needed. Our intranet and extranet solution is completely Web-based and hosted so there's nothing to install, configure or maintain. Collaborate with just an Internet connection.
Completely Secure. We guarantee 99.9% uptime through our secure, offsite data center facilities equipped with redundant servers.

An Intranet Can Enhance Productivity and Keep IT Costs Low
Webtech Softwares is an intranet application service provider, commonly known as an "ASP intranet" or "hosted intranet". With an ASP intranet there's no software to install, no servers to maintain...ever! Webtech Softwares allows your company to setup your intranet at a fraction of the time and cost of traditional intranet software. Plus, each intranet comes standard with free technical support and hassle-free Web-accessibility so you can focus on your core business.
Webtech Softwares Powerful Intranet Features:
Business Email Service:- Get anytime, anywhere access to professional email with just an Internet connection. Our Web-based email is integrated with other collaborative features such as global address books, online document management and offers POP3 and IMAP functionality plus complete virus and spam protection. You can continue using Outlook as an email client and even keep your current email address!
Online Document Management:- Streamline document management with our online document sharing and file storage solution. Manage your document review process with version control, overwrite protection, commenting and document locking. Or, use our convenient Web folders to access documents virtually. A quick and secure way to backup data in real-time.
Online Calendar:- View and manage your calendars over the Internet, using any Web browser. Web calendars are an easy way to share calendars seamlessly with teams, customers, and business partners. Manage meetings and events by checking schedules and sending invitations through an easy-to-use, online interface.
Online Contact Management:- Share and store critical business contacts online with a convenient online address book and internal directory.
Task Manager. Manage tasks and projects via the Web. Delegate tasks and get access to project status, milestones, and incomplete tasks with online project management.
Services & Upgrades:- We offer free support, training, & upgrades for life! Optional upgrades include SSL Encryption, disk storage, and data imports.