Telemarketers and inside sales representatives might seem similar, but they are not. Telemarketers use scripts, dial hundreds of numbers to get a few customers, have an aggressive approach, deal with business-to-consumer products. Whereas, inside sales representatives generate their leads instead of dialing a purchased list. They do not have a script as their conversations depend on the research they've put into their prospects. They ask for the challenges and suggestions from prospects. Their sales opportunities target business-to-business or business-to-consumer transactions.