transaction is clearer, it has spot sourcing contract management that offers a flat retail rate for each item sold. Time is also different as B2B has a slower process than B2C which is concluded in shorter periods (that could be minutes or days). Business-to-business generally requires an upfront investment whereas business-to-customers do not need a business to spend money on infrastructure. The last difference mentioned here is that in B2B, lagging behind in the digital transformation, have to deal with back-office connectivity and invoicing a number of different partners and suppliers, while B2C results in more seamless transactions as options, such as cyber-cash, allows the business to accept a wider variety of payment options. B2B typically only allows payment via credit card or invoice, making the purchasing process longer and more expensive than with B2C. B2B, as there are normally bigger amounts involved over longer periods of time, usually have higher costs than B2C, which consists of quick, daily transactions. Businesses typically want to buy on net terms, meaning that B2B merchants have to wait weeks, if not months to get paid for their goods or services. As a result, smaller businesses with less capital often struggle to stay afloat. In B2B, brand reputations greatly depend on the personal relationship between businesses. On the other hand, in B2C, the business's reputation is often fueled by publicity through the media. In many cases, the overall volume of B2B (business-to-business) transactions is much higher than the volume of B2C transactions. The primary reason for this is that in a typical supply chain there will be many B2B transactions involving subcomponents or raw materials, and only one B2C transaction, specifically the sale of the finished product to the end customer. For example, an automobile manufacturer makes several B2B transactions such as buying tires, glass for windows, and rubber hoses for its vehicles. The final transaction, a finished vehicle sold to the consumer, is a single (B2C) transaction. Organization B2B involves specific challenges at different stages. At their formation, organizations should be careful to rely on an appropriate combination of contractual and relational mechanisms. Specific combinations of contracts and relational norms may influence the nature and dynamics of the negotiations between firms. Business to business model Vertical B2B model Vertical B2B is generally oriented to manufacturing or business. It can be divided into two directions: upstream and downstream. Producers or commercial retailers can have