When comparing Stride (previously HipChat) vs TeamSpeak 3, the Slant community recommends Stride (previously HipChat) for most people. In the question“What is the best team chat software?” Stride (previously HipChat) is ranked 5th while TeamSpeak 3 is ranked 18th. The most important reason people chose Stride (previously HipChat) is:
You can access HipChat from pretty much every common platform. HipChat even allows chatting via SMS.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Available on Web, Mac, Windows, Linux, iOS, Android
You can access HipChat from pretty much every common platform. HipChat even allows chatting via SMS.
Pro Powerful @mentions
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.
Pro Huge list of integrations
Including Asana, Github, Zendesk, WordPress, MongoDB, TeamCity, JIRA, Confluence, PowerShell and more that 40 others.

Pro Cheap
Free with unlimited users, $2/user/month for voice + video calls, screencasts, full history retention and management. (Even enterprise feature like SAML)
Pro Simple, easy to use
An intuitive, easy to overview interface listing both online and offline users.
Pro Embeds files
Things like photos get automatically embedded in the chat thread once you upload them.
Pro Guest access
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.
Pro Desktop client
HipChat has an optional desktop client powered by Adobe AIR.
Pro Good audio and video support
HipChat audio and video works on mobile platforms and web browsers.

Pro "Rooms" for persistent group chat
Participate and keep tabs on ongoing discussions on particular topics or amongst certain groups of people.
Pro Self-Hosting available
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.
Pro Plentiful GIFs and custom Emoticons
Pro Syntax coloring
Pasted code can be colored based on syntax.
Pro Will be updated to have more functions in the future
A big company with experience will bring in more options like Google Apps One Time Login.
Pro Reliability has been great
Pro Powerful command system
E.g. part, away, all, here etc.
Pro A lot of features
Pro Fine-grained administration options
Allows for complex administrative structures, with lots of roles and many other features related to server administration.
Pro Advanced permissions
It has an advanced system to manage channel/server permissions.
Pro Works on all main PC OS platforms
Available on Windows, Linux and OS X allows for a user to choose what best OS suits them and not have to worry if their game chat software will work.
Pro Supports audio and text chat
TeamSpeak allows for both voice and text chat. this adds flexibility, and can clarify information if somebody has a very poor connection, or a very thick accent. It also allows players without a mic to communicate with the other players.
Pro Widely used
Among most MMOs (massive multiplayer online games such as Guild Wars 2, or World of Warcraft) Teamspeak is widely used so it's likely other players already use it and won't need to download a new program. There are also many knowledge and help articles available online.
Pro Voice Activation Detection while using Push-To-Talk
Pro Echo reduction
Pro Free for non-commercial use
As long as one is not using TeamSpeak for commercial services the app is free to use. This is great as most users will not be using it for commercial purposes (as long as you aren't making money off it you don't need to pay for it) such as gaming.
Pro Unlimited nesting of channels
This allows for very granular organization.
Pro Sound level tuning
You can tune everyone's sound output levels to meet your own personal preference in inbound volume. So to your ears nobody is too loud or too quiet.
Pro Supports Encryption
Under "Edit Channel" --> "Advanced" --> theres a toggle button called "Voice Data Encrypted". Everything but file transfers is encrypted.
Pro Plugin support
A wide range of plugins are available for those that want extra functionality, ranging from soundboards and overlays, to peripheral and application hooks.
Pro Private hosting
You can host your own server.
Pro TeamSpeak Sync
Signing up for a MyTeamSpeak account will allow you to synchronize your bookmarks, identities, hotkeys, whisper lists and channel subscriptions across all devices. MyTeamSpeak features will include addons synchronization, addons update management, and more.
Pro Clean theme
Pro No privacy nightmare
Cons
Con Will be discontinued Feb 2019
Slack acquired Stride / Hip Chat. Both Stride and Hip Chat will cease to exist. Sad since they were quite usable.
Con Prioprietary (non-free/libre)
Con Reliability of service has been weak
The reliability of the hosted HipChat service, particularly in the early days of version 4.x, has not been a strong suit.

Con Free plan has limited storage
Free plan comes with 5GB of storage, where as paid plan has "Unlimited".
Con Only one-on-one video calls in free version
There is no option for multi-user conference calls.

Con No emoji
There's no emoji support. Instead there are some strange custom emoticons which only make sense for people steeped in internet subculture and never get updated.
Con API calls are limited even on paid plan to 500 calls in 5min by default
This will force you to contact them when you need more calls.
Con Non-synced notifications
Messages read on one client don't sync their status to another client.
Con Mobile app costs money
TeamSpeak for mobile platforms costs $1.99 for Android devices in Google play store or $4.99 for devices that run iOS.
Con Requires to self-host, rent or use a public server
TeamSpeak cannot be used without a private server (meaning TeamSpeak themselves do not provide servers). This adds complexity to the setup and may simply be out of reach for many users. There are, however, several free public servers available, Teamspeak offers to rent one, and many games have dedicated servers available through their respective websites.
Con Outdated UI
The client itself feels really old, and even though there are custom huds, most of them don't feel modern.
Con Proprietary software
It's not free.
Con No video communication
Currently there is no video chat for the app. While not essential for in-game communication, outside of the game it would help to strengthen online relationships with your gaming pals.
Con Too easy to hack
Your server may become vulnerable if you give admin away and do not configure your server properly.
Keeping a record of backups is important, if you broke something while editing the configuration or your server has become compromised due to negligence. You will then be able to spin up a new instance.
