If your company want Microsoft Access, or Self Services Business Intelligence like Powerpivot etc, or Hybrid deployment. Then, your company can upgrade to Office 365 Enterprise E3 Plan
Alternatively, your company can add other standalone online plan. Like Microsoft Project Online, Visio Online or Dynamics CRM Online etc.
Exchange Online Plan 1
What if you intend to subscribed for or currently using Exchange Online Plan 1?
By adding additional USD1 per user per month. You can upgrade to Office 365 Business Premium, which you have SharePoint Online, Lync online, Yammer and you have 1TB of One Drive for Business per user
Or if your company want to included Microsoft Office. Then, your company can upgrade to Office 365 Business premium. Then your company can add stanalone plan like Microsoft Project Online, Visio Online and Dynamics CRM online.
A comparison of all Office 365 plan with Exchange Online Plan 1 and Plan 2 as follow :