Highrise vs Zoho CRM

Highrise CRM allows to save and organize notes and email conversations for up to 30,000 customers and contacts, keep track of proposals and deals, share status with your company, department, or team.
Zoho CRM
Zoho CRM is an alternative online software for SMB that empowers organizations with a complete customer relationship lifecycle management software for managing organization-wide Sales, Marketing, Customer Support & Service and Inventory Management in a single business system.
Face to face in the news:

2017 - Zoho CRM gets AI assistant to defeate Highrise

Zoho has introduced Zia - the Artificial Intelligence-powered Sales Assistant for Zoho CRM. Zia lets you know when something is going extraordinarily well –or wrong- in your sales operation, knows what you want to do – and helps you do it faster and bring the end of voicemails and unread emails. Zia is capable of learning, over time, the most frequent actions a particular user takes on Zoho CRM. Besides, Zoho introduced Blueprint, a sales process automation platform and upgraded two features to platforms: Zoho PhoneBridge, which connects a customer's PBX system to the Zoho CRM system, and SalesSignals, which provides real-time information about the activities of customers and prospects.

2015 - Highrise 2.0 for the iPhone is ready. Zoho CRM is in panic

Highrise 2.0 for the iPhone is now available to everyone on the App Store. It had been over 4 years since Basecamp's CRM tool was released, and it hadn't kept up with changes to iOS. The original iPhone app was built using an iOS framework that wasn't supported any longer, and hence, Apple was no longer approving apps built using that old technology. So the new Highrise owners decided to pull the Highrise iPhone app from the store because of the bugs people were facing. And then they built the new iPhone app from the scratch. It has your Activity Feed, Contacts, Tasks, and Custom Fields. And all sorts of helpful extras. For example, adding a task from anywhere in the app assigns that context to the task (just like it does in the web app). On a contact, add a task, the task is now Re: your contact. On an email, add a task, the task is Re: that specific email. The Current Location help when editing an address, making it a ton easier to add new Contacts when you are mobile.