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Calendar & Time Management · head to head

OmniFocus vs Slack

OmniFocus logo

OmniFocus

Calendar & Time Management

Professional-grade task management for power users

From
$99.99/year
Rated
-
Full reviewWebsite
Slack logo

Slack

All industries

Where work happens

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Slack has a free tier, so it costs nothing to try first.
  • Each has a real cost: OmniFocus exclusive to Apple ecosystem with no Windows or Android support; Slack 90-day message history limit on free plan results in important conversations disappearing
  • They diverge on capability: OmniFocus covers Custom perspectives, Slack covers Channels.

Where they differ

Only the attributes on which OmniFocus and Slack actually diverge.

Attributes where OmniFocus and Slack differ
AttributeOmniFocusSlack
Starting price$99.99/yearFree
Free tierNoYes
PlatformsmacOS, iOS, iPadOS, watchOS, visionOS, WebWeb, iOS, Android, macOS, Windows, Linux
CategoryCalendar & Time ManagementAll industries
Founded19892009

Identical on both: pricing model (Unknown), user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in OmniFocus

  • Custom perspectives
  • Review mode
  • Forecast view
  • Tags
  • Automation
  • Apple Calendar
  • Siri
  • Shortcuts

Only in Slack

  • Channels
  • Direct messaging
  • Voice & video calls
  • Screen sharing
  • File sharing
  • Search
  • Workflow builder
  • Slack Connect

What people use each for

The jobs each tool is most often brought in to do.

OmniFocus

  • Schedulingnot Slack
  • Appointment bookingnot Slack
  • Time trackingnot Slack
  • Resource managementnot Slack
  • Team coordinationnot Slack

Slack

  • Team communicationnot OmniFocus
  • Project coordinationnot OmniFocus
  • Customer supportnot OmniFocus
  • Remote worknot OmniFocus
  • Cross-functional collaborationnot OmniFocus

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

OmniFocus

  • Exclusive to Apple ecosystem with no Windows or Android support
  • No collaboration features make it unsuitable for team task management or delegation
  • Setting up repeating tasks is cumbersome with multiple configuration options
  • Lacks AI-powered features for advanced project management, load balancing, or contextual awareness

Slack

  • 90-day message history limit on free plan results in important conversations disappearing
  • Per-user pricing becomes expensive quickly for larger teams
  • Notification overload with 78% of employees feeling overwhelmed by notifications
  • Mobile app performance issues including lag and slow syncing
  • Huddles limited to 50 people and cannot be recorded
  • Requires dedicated video conferencing service for formal meetings and webinars

Pricing, plan by plan

OmniFocus

$99.99/year
  • Subscription$99.99/year
    • All Pro features
    • Web access
    • Cloud sync
  • Standard (Perpetual)$74.99/one-time
    • Basic task management
    • Projects and contexts
    • Perspectives
  • Pro (Perpetual)$149.99/one-time
    • Custom perspectives
    • Advanced automation
    • Plugins support

Slack

Free

No published plan breakdown. See the Slack review.

Which should you pick?

Choose OmniFocus if

  • You need custom perspectives.
  • You work on macOS, iOS, iPadOS, watchOS, visionOS, Web.
  • You also want review mode.
OmniFocus review

Choose Slack if

  • You need channels.
  • You want to start without paying.
  • You work on Web, iOS, Android, macOS, Windows, Linux.
  • You also want direct messaging.
Slack review

Questions people ask

Is OmniFocus or Slack better?
Neither clearly leads. OmniFocus starts at $99.99/year and Slack at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, OmniFocus or Slack?
Slack has a free tier; the other does not. Paid plans start at $99.99/year for OmniFocus and Free for Slack.
Does OmniFocus or Slack run on more platforms?
OmniFocus runs on macOS, iOS, iPadOS, watchOS, visionOS, Web. Slack runs on Web, iOS, Android, macOS, Windows, Linux.
Can I use Slack for free?
Yes. Slack has a free tier, so you can try it without paying. OmniFocus starts at $99.99/year.
What is OmniFocus best used for?
OmniFocus is most often used for scheduling, appointment booking, time tracking, resource management. Of those, scheduling and appointment booking are not what Slack is typically brought in for.
What can OmniFocus do that Slack cannot?
OmniFocus covers Custom perspectives, Review mode, Forecast view, Tags. Slack covers Channels, Direct messaging, Voice & video calls, Screen sharing.

Answered from the vendors’ own pages

OmniFocus: Does OmniFocus offer a free tier?

No, OmniFocus does not offer a free tier. It requires purchase or subscription: $99.99/year subscription or one-time perpetual licenses at $74.99 (Standard) or $149.99 (Pro).

Source
Slack: Does Slack have a free plan?

Yes, Slack offers a free plan indefinitely with no credit card required. Free users get 90-day message history, up to 10 app integrations, and 1:1 huddles.

Source
OmniFocus: What is the free trial period for OmniFocus?

OmniFocus offers a 14-day free trial allowing full access to all features before requiring payment.

Source
Slack: What are Slack's pricing plans?

Slack offers Free, Pro ($7.25/user/month with annual billing), Business+ ($12.50/user/month), and Enterprise Grid (custom pricing). Monthly billing costs approximately 20% more than annual.

Source
OmniFocus: What platforms does OmniFocus support?

OmniFocus is exclusive to Apple ecosystem: Mac, iPhone, iPad, Apple Watch, Apple Vision Pro, and web access. Not available on Windows or Android.

Source
Slack: Does Slack support offline use?

Slack is a cloud-based platform and does not support robust offline work. Internet connectivity is required to access messages and collaborate.

Source
OmniFocus: Can teams collaborate in OmniFocus?

No, OmniFocus lacks collaboration features and is designed as a solo task management tool. Users cannot delegate tasks, share projects, or assign work to team members.

Source
Slack: What integrations does Slack support?

Slack integrates with 43+ apps on average per team, including Google Drive, ChatGPT, Vercel, Asana, GitHub, and many others through their app marketplace.

Source
OmniFocus: Does OmniFocus support Getting Things Done (GTD) methodology?

Yes, OmniFocus is built specifically to support GTD with projects, contexts (tags), folders, perspectives, and a focus view for prioritization. It includes weekly review support and automation features.

Source
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