Skype vs Slack

Skype is a software application that allows users to make voice and video calls and chats over the Internet. Calls to other users within the Skype service are free, while calls to both traditional landline telephones and mobile phones can be made for a fee using a debit-based user account system. Skype has also become popular for its additional features which include instant messaging, file transfer, and videoconferencing. Skype alternative for enterprise is called Skype for Business. Secure Skype alternatives are Signal and Telegram.
Slack brings all your communication together in one place. It's real-time messaging, archiving and search for modern teams. Create open channels for the projects, groups and topics that the whole team shares. Slack searches whole conversations, not just individual messages, so you can find what you’re looking for no matter who said what or when they said it. Slack free open-source (self-hosted) alternatives are: Mattermost, Rocket.Chat, Zulip
Comparing Skype vs Slack is like comparing apples to oranges. Because your business is unique and nobody except you can decide, which is better for your company. But we can add some fun to your research and suggest some new comparison parameters.

Let's start with videos. We think that Skype has better video than Slack

Ok, now let's compare the UI. Looks like Skype has more user-friendly interface than Slack because it's bigger. At least on our screenshots

To compare the popularity of the solutions we counted how many alternatives people search for each of them on the Internet. And it turns out that Skype is more popular than Slack

Now let's look at the recent activities of our competitors:

- Skype radically redesigned mobile and desktop apps (in 2017)
- Slack raised $250 million at $5 billion valuation (in 2017)
- Slack adds screen sharing (in 2017)
- Slack launched Enterprise version of its group chat (in 2017)
- Slack now allows to add comments to particular message (in 2017)
- Skype adds real-time translation to all VoIP calls (in 2016)
- Slack adds video calls (in 2016)
- Google and Slack team up against Microsoft and Facebook (in 2016)
- Skype now allows to make calls without registration (in 2016)
- Slack to be powered by IBM Watson AI (in 2016)

Looks like Slack was recently more active than Skype (at least in our news). We also found some news, in which Skype and Slack meet head to head:

2017 - Slack launched Enterprise version of its group chat. Skype is in panic

Slack has launched Enterprise Grid — a new product aimed at large enterprises. It comes with a range of features that are essentially table stakes in the enterprise software market. IT administrators are now be able to manage and provision multiple large teams; and, in addition to the encryption that Slack already offers, add in new layers of security and identity management; set new security and compliance controls; and new HIPAA & FINRA compliance and data loss prevention integration. The initial customers include Capital One, Paypal and IBM. IBM is a particularly interesting name to see here, given that it sells its own collaboration product for large enterprises, IBM Connections, and it is also working on what appears to be its own AI business intelligence product, Watson Workspace. Other would be competitors include Workplace from Facebook, Microsoft’s Teams, Jive and Spark from Cisco. Pricing for Enterprise Grid — unlike normal Slack, where pricing starts at $8 and $15 per month for two tiers.

2016 - Skype now allows to make calls without registration to defeate Slack

Last year Skype enabled to invite to chat or video call people that don't have Skype account. Now it's possible to start chat and calls without registration also. All you have to do is go to and click "Start a Conversation." You type in your name, it creates the chat with its own unique link that you can send to friends or colleagues. They don't need to use an account either. You can invite up to 300 people in a text chat or up to 25 on voice or video calls. The conversation only lasts for 24 hours, so you won't be able to go through your post history afterwards. You also won't be able to use Skype Translator or call phone numbers with the service; those still require you to have a Skype account.

2016 - Skype integrated with Slack

The new Slack integration allows team members using Slack’s real-time communication software a way to quickly start Skype voice or video call from within the Slack application. Once installed, kicking off a Skype call is as simple as just typing in “/skype” into the Slack chat interface, which will then display a join link. On the desktop, you’ll only need a web browser plugin, while on mobile, you’ll need to download the Skype mobile application onto your smartphone. Slack team members can also join as guests on a computer, or they can sign in using their Skype name or Microsoft account information.