Technology has always played a big role in business and managing resources more efficiently. Team communication and messaging is one area in particular where we've seen a ton of action lately, with apps such as Slack becoming the ultimate tool for workgroup collaboration.

Because messaging is such a broad category, we're going to focus on software that facilitates team communication and within this group, the free to use options. In short, this app roundup is for startups, small businesses, and anyone looking to optimize team communication without spending any money.

There are a couple of standout apps and services: Slack and HipChat, which are followed by a group of very similar featured programs with a lot smaller user bases: Btrix24, Rocket.Chat, Ryver, and Fleep. Most of these use the freemium model, that is, offer a free working version with subscription-based plans that add features - with the exception of Rocket.Chat which is free and open source.

We'll compare core app features offered before you need to pay, and highlight pros and cons for each program, so you can choose which one suits your team's needs the best.

To better visualize what's on offer free of charge, here's a feature overview comparing the different apps. It hit us while preparing this feature how generous the starter free tiers have become, particularly for the more renown alternatives:

  Slack HipChat Ryver Spark Btrix24 Fleep Rocket.Chat
Number of Users Unlimited Unlimited Unlimited Unlimited Unlimited Unlimited Unlimited
Free Online Storage 5GB 5GB Unlimited 5GB 5GB 5GB Up to you
Guest Access No Unlimited Unlimited Yes No Yes Unlimited
Apps for Win/Mac/
Yes Yes Yes+Linux Yes Yes+Linux Yes Yes+Linux
Searchable Content 10K most recent messages 25K most recent messages Unlimited Unlimited Unlimited Unlimited Unlimited
Custom or App Integrations 10 Unlimited Unlimited 10 Unlimited Unlimited Unlimited
Voice and Video Calls Yes (only 2-person calling) No No Yes (video up to 3 people) Yes No Yes
Self Host No No No No No No Yes
Standard Tier
per Month
$8 per user $2 per user N/A All free $12 per user $99 flat fee €1 per user N/A All free


Slack is the heavy hitter of the group with a valuation of over $3 billion. Their main clients are big companies that used to rely on the previous generation of SaaS solutions from Oracle and others. That said, Slack is very polished and great for any team regardless of their size.

Thanks to its sheer popularity, Slack can be integrated with nearly every service you can think of. The free tier will let you use up to 10 of these, but for small teams it should be plenty.

The two main cons of Slack's free version is lack of guest access which is essential for firms who want clients or providers to participate actively with their teams, and the 10K limit for searchable messages. To give you an idea, internally our team communication app with approximately 12 members has gone through 50,000 messages in about 3 years.


This is TechSpot's app of choice, not because it's necessarily better than the others but it's the second solution we tried a few years ago and we've stuck with it. It's pretty good, too. Search is efficient. Interface is clean and integrations work well. It's multi-platform, though some of its apps could use improvement, particularly in Windows (interface and updates) and Android (speed).

HipChat improves on Slack's free tier by including unlimited guest access, expanding the searchable messages to 25,000 and the integrations to unlimited. The 5GB of online storage seems generous and pretty standard across the board if your not sharing huge files. If you do, then coupling this with some cloud storage provider would be the way to go.

Slack and Hipchat should be your first two choices unless you foresee the limitation in searchable messages will cause you trouble down the line. It's by far their biggest con, and why we are expanding the list to include the next four apps.


Ryver is a startup that was conceived as a free messaging option from its inception. It offers unlimited users, unlimited online storage, unlimited guest access and unlimited integrations.

The only major feature not present is voice call and video conference, but it makes up for it with a user friendly interface. Most everyone agree that Ryver on current form is a great alternative to Slack, but notifications could use some work.

If you are just getting aboard with this new generation of team communication apps and want a solution that can grow with you without having to migrate to a paid plan, this might be the one for you.

Cisco Spark

The networking and telecommunications giant is well known for its collaboration portfolio, facilitating over 5 million meetings around the world every month, their audio and video conferencing solutions come second to none. With this kind of background, it's no surprise Cisco Spark has become a hit. What was surprising though, was the company's aggressive move into Slack's territory and what's on offer free of charge.

Spark's interface is clean, minimalist and modern. The strong suit for the free version of Spark has to be the unlimited audio and video calls, plus integration to current Cisco equipment. Although VoIP calls have no limit on the number of participants, video calls are limited to 3 people per call. Their end-to-end encryption is also worth a mention.


Btrix24 is on the list because its free version offers unlimited searchable messages, unlimited voice and video calls, and it's found itself a niche as a communication platform that also provides built-in task and project management, as well as CRM and sales automation.

The standard version with a flat fee of $99 /mo regardless the number of users can be a great deal for larger organizations, too.

Conversely, the biggest downside if you don't need all the extra features is a somewhat cramped interface. Because I use our team communication app to send messages, share screenshots and the occasional file, the calendar, tasks, projects, scheduling and streams seem a lot to process, but it might be just what you need if you want to consolidate all those in one place.


Fleep separates itself from the group by offering an open approach when it comes to bringing people in. Instead of having to register, sign-up, download, install and learn how to use a given program, you can integrate people outside the app through email.

The users in Fleep see the guest or outside collaborators as regular users, but they receive the messages as email threads. As for features, Fleep is quite well rounded. You can manage tasks, pin important messages, and keep a drawer with important files and photos for easy access. It's also got a deep built-in integration with Google Hangouts for audio and video calls. 


One for developers and power users that can handle a little more trouble that can pay off in the long run. Rocket.Chat had to be on the list because it's open source and can be self-hosted. The community backing this project is quite committed and continuously improving features. It's also one of the few to provide a good native app for Linux. For a company with a capable IT department, this is a great choice.

The list of key features is just as good as any of the other programs mentioned above. Although some open source products lack proper support, for affordable rates you can receive full support, customization and integrations.