Stride (previously HipChat) vs Missive

You can access HipChat from pretty much every common platform. HipChat even allows chatting via SMS.

You can ping people to get their attention even if they are not online by @mentioning them. Depending on how the person has set their account up it can be by notifications via in-app sounds, visual alerts, and even email, SMS, or mobile app push notifications.

Including Asana, Github, Zendesk, WordPress, MongoDB, TeamCity, JIRA, Confluence, PowerShell and more that 40 others.

Free with unlimited users, $2/user/month for voice + video calls, screencasts, full history retention and management. (Even enterprise feature like SAML)

An intuitive, easy to overview interface listing both online and offline users.

Things like photos get automatically embedded in the chat thread once you upload them.

You can invite people to join conversations even if they don't have a HipChat account. HipChat will generate a link to share and the guest will only need to enter their name to join the conversation.

HipChat has an optional desktop client powered by Adobe AIR.

HipChat audio and video works on mobile platforms and web browsers.

Participate and keep tabs on ongoing discussions on particular topics or amongst certain groups of people.

If you are worried about third-parties getting access to your data you should consider self-hosting. With self-hosting you are in control over where your data is stored, who has access to it. You will also not be vulnerable to exploits of a third-party provider.

Pasted code can be colored based on syntax.

A big company with experience will bring in more options like Google Apps One Time Login.

E.g. part, away, all, here etc.

In Missive you can live edit an email draft with your teammates, the draft composer acts exactly like a Google doc. Each team member has a different color cursor.

The email section allows for consuming all of your email accounts in it, utilizing shared addresses (help@acme.com), personal work inbox (philippe@acme.com) and personal inbox (phil@gmail.com).

It’s important because the collaborative part of Missive becomes useful when users consume all of their emails within the app. You not only want to collaborate around emails sent to your company help@address, but also around the really important emails you most likely receive at your personal company address, like that really important email you received from a potential high profile partner.

Missive is also a team chat app. When using Missive you can ditch your email client, chat app and help desk.

Merge all email accounts in one unified inbox.

You can create multiple tasks per conversation all assignable to a single or a group of persons.

Nicely written software. Always works as you'd expect, beautifully designed, a classy piece of software.

Supports multiple organizations with one user login.

Know exactly if and when the recipients read your important email.

Supports Gmail shortcuts.