ONLYOFFICE vs Office 365

ONLYOFFICE is a cloud business service that enables you to manage projects, customer relations and documents in one place. In other words, you don't need to switch back and forth between multiple applications to perform different tasks. Here you obtain a single multi-featured system to organize every step of your work improving your productivity and optimizing efforts for success.
Office 365
Microsoft Office 365 is commercial software plus services offering a set of products from Microsoft. Office 365 includes the Microsoft Office suite of desktop applications and hosted versions of Microsoft's Server products (including Exchange Server, SharePoint Server, and Lync Server), delivered and accessed over the Internet, in effect, the next version of Business Productivity Online Suite (BPOS). Office 365 free alternatives are Zoho, Google Apps.
Face to face in the news:

2015 - Online office suite ONLYOFFICE launched free cloud version to challenge Office 365

On the occasion of its 5th birthday ONLYOFFICE announced the launch of the free SaaS version ONLYOFFICE Free Cloud. It includes mail server to create corporate mailboxes, 2 GB of Amazon cloud storage space, online editors for text, spreadsheets and presentations, Calendar, Chat, Feed and Mail Aggregator, and 5 full-featured modules: Documents, Projects, CRM, People and Community. ONLYOFFICE Free Cloud is listed on our new website – - where you will find the information about all the solutions provided by ONLYOFFICE at no cost.

2011 - TeamLab adds CRM module to fight Office 365

TeamLab CRM
Freemium online collaboration service TeamLab continues to impress us with the new functionality. At this time TeamLab adds CRM-module. It's a pretty nice and easy-to-use CRM system that includes contacts, tasks, opportunities and cases. You can quickly import your contacts from CSV. For each contact you can add notes, tasks, attach files, opportunities and even link a Twitter-blog. The tasks provide email notifications, so you can create tasks for follow-up calls. In opportunities, you can plan the budget, success probability and track the stage, but there no financial reports like sales funnel. Cases section allows for example to organize different marketing events (see in one place all related tasks, contacts, documents). You can control access rights to all the records. In general, TeamLab CRM is pretty nice, and only lacks email integration. But the TeamLab developers promise to add Email-module soon as well as mobile version of the CRM system. For now the CRM module is in Beta stage and nothing is said about whether it will be paid or join the broad free functional of TeamLab.