
Trello
Asana
Microsoft Teams
Discord
Telegram
Basecamp
Mattermost
A messaging app for teams who see through the Earth!

Time Flies
Happen
Timer and Stopwatch
Stoic Life Journal
intnt
Your Life In Weeks
Hacker News Stack
FailFlow is a free online resource providing practical date, calendar, countdown and time-related tools designed to make everyday planning and date calculations easier.

Which is more popular?
Based on our record, Slack seems to be more popular. It has been mentioned 239 times since March 2021.
Website, pricing, platforms and company facts side by side.
|
|
|
|
|---|---|---|
| Website | slack.com | failflow.net |
| Pricing | ||
| Company | Startup from the United States | — |
| Listed in |
What each product offers, as listed by its team.


Possible disadvantages
No features have been listed yet.
Walkthroughs and reviews on video.
Review: How & Why We Use Slack At Our Office
More videos
No FailFlow videos yet. You could help us improve this page by suggesting one.
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Slack and FailFlow.
FailFlow's answer:
FailFlow (failflow.net) is a free, web-based collection of date & time tools that works entirely in the browser - no download, no signup, no account required. It bundles many handy tools in one place: age calculator, days-between-dates calculator, date-duration calculator, countdown timer creator, countdown to 2027, weekday-of-date and birthday-weekday finder, holiday lists, and week numbers. Everything is 100% free, with no paid tiers.
FailFlow's answer:
FailFlow is completely free - every tool is free forever with no paid tiers, no signup and no account required. It runs entirely in the browser, so there is nothing to download. Instead of a single calculator, it bundles many date & time tools in one place: age calculator, days-between-dates, date-duration calculator, countdown timer creator, weekday and birthday-weekday finder, holiday lists and week numbers.
FailFlow's answer:
Anyone who needs to do date math or track time to an event: event planners counting down to occasions, couples counting down to weddings, birthday trackers, and HR or leave-planning use cases like calculating age or days between dates. The tools are free, require no signup and work entirely in the browser, so they suit casual everyday users as well.
Share your experience with using Slack and FailFlow. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


i use it at my job it has really helped me keep myself updated with team news and updates. i would prefer it over teams and discord
Slack has transformed how we communicate at Polar Credit, making collaboration faster and more organized. The channel-based messaging, direct integrations with essential tools, and real-time notifications keep our...
Slack has completely transformed how our team works together. The channels keep conversations organized, and we never lose track of important discussions. It integrates with tools like Google Drive and Zoom, making...
We have no reviews of FailFlow yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


Electron, React Native, and more recently Tauri came out of that. They gave teams a dynamic runtime, hot reloading, and the whole ecosystem of web libraries, so one team could ship to several platforms at once. And it worked: Slack,... - Source: dev.to / 3 days ago
The problem is that the URL has to be reachable from the public internet. During development, your application runs on localhost:3000, behind a home router or an office NAT. GitHub, Stripe, and Slack cannot reach that address. To test... - Source: dev.to / 4 days ago
Slack is where most work starts and answers land. It gives Pipa the message, requester, workspace, thread, and delivery target. - Source: dev.to / 5 months ago
Tracking FailFlow since Oct 2026.
When comparing Slack and FailFlow, you can also consider the following products.

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.
Compare Trello to Slack or FailFlow:


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.
Compare Asana to Slack or FailFlow:

Stop guessing what customers want, start making things happen
Compare Happen to Slack or FailFlow:

Microsoft Teams provides the enterprise-level security, compliance and management features you expect from Office 365, including broad support for compliance standards, and eDiscovery and legal hold for channels, chats, and files.
Compare Microsoft Teams to Slack or FailFlow:

Online Stopwatch, with start alerts, lap times and sounds. Save details of your timings in a text file.
Compare Timer and Stopwatch to Slack or FailFlow: