Software Alternatives, Accelerators & Startups

Cal.com VS Slack

Compare Cal.com VS Slack and see what are their differences

Cal.com logo Cal.com

Cal.com (formerly Calendso) is the open source Calendly alternative.

Slack logo Slack

A messaging app for teams who see through the Earth!
  • Cal.com Landing page
    Landing page //
    2023-10-08
  • Slack Landing page
    Landing page //
    2023-07-18

Cal.com videos

What can you do with Cal? | Cal.com Version 1.1 Launch | 10 new languages

More videos:

  • Review - Cal.com Version 1.0 Launch Event

Slack videos

Review: How & Why We Use Slack At Our Office

More videos:

  • Review - What is Slack?
  • Tutorial - Slack App Tutorial: How & Why We Use SLACK For Our Remote Team

Category Popularity

0-100% (relative to Cal.com and Slack)
Productivity
33 33%
67% 67
Communication
0 0%
100% 100
Appointments and Scheduling
Project Management
0 0%
100% 100

User comments

Share your experience with using Cal.com and Slack. For example, how are they different and which one is better?
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Reviews

These are some of the external sources and on-site user reviews we've used to compare Cal.com and Slack

Cal.com Reviews

I've poked around a while ago at some Calendly alternatives (specifically was lo... | Hacker News
I tried using https://cal.com for a bit but ended up just switching over to https://zcal.co and it has been great so far. All these other scheduling tools end up trying to do too much and always seem to end up a bit clunky and charge absurd amounts for it

Slack Reviews

  1. Best app for getting in touch with my colleagues

    Slack is best platform to be used for professional purposes. It helps me keep my professional and personal life separate.

    🏁 Competitors: Microsoft Teams
    👍 Pros:    Bulk messaging
    👎 Cons:    Sometimes the download is slow
  2. Best tool for messaging to business.

    Slack helps business to get their teams in touch with each other. The interface is very user friendly and easy to use.

    🏁 Competitors: Microsoft Teams
    👍 Pros:    Easy to use|User friendly interface
    👎 Cons:    Costly
  3. great tool for teamwork

    i have been using slack for my work and it is truly amazing. provides great effeciency and helps to manage a large number of team and stay connected throughout. reccomended for businesses with big teams

    👍 Pros:    High quality|User-friendly|Good support
    👎 Cons:    Notifications|Notification and alert

20 Telegram Alternatives to Chat With in 2024
Slack works more like a forum than Teams does – falling somewhere in between a forum and a chat software. It lets you organize discussions into different channels, as well as by thread. You can invite others into a thread by @mentioning them, and it lets you add lots of different types of content. Slack works really well for 1:1 audio meetings, “huddles,” that give you the...
Why we switched to Mattermost
Now, obviously core messaging functionality is critical. Mattermost is great there, but so is Slack. In fact, Slack features like third-party integrations and threaded messaging were missed greatly (thank you, Mattermost, for recently adding threaded messaging). So the relative parity between the solutions from a ‘speeds and feeds’ perspective was table stakes, but we...
Source: netfoundry.io
Microsoft Teams Vs Clariti: Which one should you choose?
The main reason behind the sudden rise of Teams is it is being offered at no added cost to Office 365 users. This strategy paid for Teams as it was able to increase its market share and overtake its potential rival Slack in no time. Though Microsoft is not earning any revenue (they may actually be losing money in selling Teams), they are able to sustain due to their deep...
Source: clariti.app
15 Best Instant Messaging Apps for Business
Clariti is a relatively new instant messaging app that has been gaining in popularity among small businesses and the startup community especially in the technology and media markets. A key reason for its success has been its ability to address issues that other long-standing tools like Slack and Teams have perpetuated with their chat-focused communication paradigm. Clariti...
Source: clariti.app
14 of the Best Slack Alternatives for 2022
Luckily, when it comes to choosing the right communication tool for your team, you have a variety of options. I’ve briefly covered the best apps your team might enjoy, but if you need more in-depth information on team chat tools like Slack, check out Chanty’s Slack alternatives review. It shares Chanty's experience and feedback from testing seven different team chat software...

Social recommendations and mentions

Based on our record, Slack should be more popular than Cal.com. It has been mentiond 208 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

Cal.com mentions (53)

  • Start your own (side) business with open-source in mind
    Cal.com is an open-source event-juggling scheduler for everyone, and is free for individuals. - Source: dev.to / 3 months ago
  • Fellow HSP entrepreneurs, how do you manage your energy and stress?
    I force clients who want to talk to me to book a call. I use cal.com (free) and my Google Calendar (which its linked to) only allows calls on specific days/times. I have a few "Call Blocks" where they can book. That let's me do calls in a small section of my week, with ample downtime to recover the rest of the week. I'm still learning how many calls a day I can handle. Currently anything more than 2 is too much. Source: 6 months ago
  • 🔥🔥 Our awesome OSS friends 😍
    Cal.com- Cal.com is a scheduling tool that helps you schedule meetings without the back-and-forth emails. - Source: dev.to / 6 months ago
  • Cal.com Selfhost Issue: Deploying cal.com on selfhost environment gives prisma is not defined issue.
    Has any one deployed cal.com with selfhosted environment. Is yes how would have configured prisma for the same. Source: 7 months ago
  • Open Source, EVERYTHING??
    Recently I came across a company called cal.com, it's a Calendly alternative, but the catch is the entire software is open source: https://github.com/calcom/cal.com. Source: 8 months ago
View more

Slack mentions (208)

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What are some alternatives?

When comparing Cal.com and Slack, you can also consider the following products

Calendly - Say goodbye to phone and email tag for finding the perfect meeting time with Calendly. It's 100% free, super easy to use and you'll love our customer service.

Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.

SavvyCal - A scheduling tool both the sender and the recipient will love.

Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.

zcal - zcal is the fastest way to schedule every meeting for Free and make it personal.

Asana - Asana project management is an effort to re-imagine how we work together, through modern productivity software. Fast and versatile, Asana helps individuals and groups get more done.