When comparing Campfire vs Gitter.im, the Slant community recommends Gitter.im for most people. In the question“What is the best team chat software?” Gitter.im is ranked 11th while Campfire is ranked 30th. The most important reason people chose Gitter.im is:
Integrations for Trello, Jenkins, Travis CI, Heroku, Sentry, BitBucket, HuBoard, Logentries, Pagerduty & Sprintly are available.
Specs
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Pros
Pro Supports optional 128-bit SSL encryption
Pro Guest access
You can invite people to join conversations even if they don't have a Campfire account. Campfire will generate a link to share and the guest will only need to enter their name to join the conversation.
Pro Easy conferencing
When you need to make a conference call, all you need to click is "Start A New Call" and Campfire instantly embeds a phone number and password code in the message thread.
Pro Mobile apps
Campfire supports only iOS, but third party apps can be used for Android. There are also other third party apps that build upon Campfire and extend its functionality.
Pro Embeds images
Images that are uploaded in the GIF, PNG, or JPEG formats are represented as thumbnails in the chat room.
Pro Has many developer-friendly integrations
Integrations for Trello, Jenkins, Travis CI, Heroku, Sentry, BitBucket, HuBoard, Logentries, Pagerduty & Sprintly are available.
Pro Unlimited public and private rooms for free
Pro Has full Markdown support
Pro Has an IRC bridge
Pro Has apps for OSX, iOS and Chrome
Pro Has a Windows 8 app
Unofficial app for Gitter.im is currently available.
Pro Open source
Cons
Con Future of Campfire is uncertain
37signals have "changed direction" away from Campfire, focusing on Basecamp. They've ruled out shutting it down, but at this stage it's uncertain whether it'll be spun off as a separate company, sold off, or run in maintenance mode without any new features.