Stop reading rankings. Trial Slack against its alternatives on your own team.

Third-party comparisons cannot see your integrations, your habits or your constraints. A structured two-week pilot in 2026 tells you more than any listicle. Print this, or just tick the boxes as you go.

Before the pilot

Write down what you actually use.Channels, huddles, integrations, external partner channels, search. If a feature is not on this list, it cannot count against a candidate later.

Pick two candidates, not five.One from the ecosystem you already pay for, one from outside it. More than two pilots at once produces noise, not signal.

Recruit one real team, five to ten people.Volunteers who volunteer to like new tools will skew the result. Take a team with normal levels of scepticism.

Ask your admin and security people for their veto list first.Identity, retention, export and access requirements kill candidates faster than any usability complaint. Learn the vetoes before the pilot, not after.

During the two weeks

Move real work, not test chatter.One live project must run entirely in the candidate tool. Sandboxes full of "testing 123" messages measure nothing.

Rebuild your single most-used integration.The effort this takes is your best preview of full migration cost.

Run one call or huddle equivalent per day.Audio quirks show up under daily use, not in a one-off demo.

On day ten, search for something from day two.Retrieval is the feature people rate last and depend on most.

Note every time someone falls back to the old tool.Each fallback is a datapoint about a gap. Collect them without judgement.

An illustrative pilot schedule, not a measurement of anything. Adjust the checkpoints to your team's rhythm.

After the pilot: the pass or fail questions

Did the team keep using it without reminders in week two?Voluntary continued use is the strongest single signal a pilot produces.

Can you get your data back out?Run an actual export before deciding, and open the file. A tool you cannot leave is a tool you should hesitate to enter.

Does every alternative's weak spot matter to you?Teams stops paying off outside Microsoft 365. Google Chat is thin outside Workspace. Discord lacks workplace compliance controls. Mattermost hands you the operations burden. Zulip demands onboarding effort. Each limit is fatal for some teams and irrelevant for others.

Is the total cost of moving smaller than the problem you are solving?If you cannot name the problem Slack is causing, the pilot's honest verdict may be to stay.

If your pilot touches personal data: real messages contain personal information about colleagues and customers. Rules on processing, exporting and retaining it vary by country and sector, and this checklist is not legal advice. Clear the pilot with whoever owns data protection in your organisation, and rely on official regulator guidance and vendor documentation, not this page.

No winner is printed at the bottom of this clipboard on purpose. The pilot exists because the answer depends on your integrations, your existing licences, your operations capacity and your team's tolerance for change. Two teams running this same checklist in 2026 can reach opposite conclusions, and both can be right.

Disclosure. This checklist is published independently and exists only to inform. It carries no affiliation, endorsement, sponsorship or authorisation from Slack Technologies, Salesforce, Microsoft, Google, Discord, Mattermost or Kandra Labs, and none of those companies reviewed or approved it. Trademarks stay with their owners and are used solely to name the products discussed. No payment or compensation was received from anyone, and no testimonial, review, rating or endorsement appears here. Products change faster than pages like this one; verify every detail with the vendor before acting on it. Completing this checklist promises nothing, and no particular result or outcome is implied.