What are some alternatives?
When comparing sales-i and TopOPPS, you can also consider the following products
Clari - Clari is a predictive analytics platform for sales people.
Yesware - Sell smarter with email tracking and more
InsightSquared - #1 for Salesforce.com Pipeline forecasting, profitability analysis, activity tracking: all the small business intelligence you need. Works using CRM data and automatic syncing.
Aviso - Aviso provides predictive analytics software to help sales organizations optimize their performance and exceed revenue goals using machine learning algorithms and portfolio management techniques.
Looker - Looker makes it easy for analysts to create and curate custom data experiences—so everyone in the business can explore the data that matters to them, in the context that makes it truly meaningful.
Salesforce Sales Analytics - Salesforce analytics gives you the business intelligence tools you need to make smarter decisions.