What Slack is
Slack is made by Salesforce. It sits in our Team communication category, alongside the other options listed at the end of this page.
Best suited to: Teams that want fast messaging that replaces internal email.
What it does
- Channels and direct messages
- Huddles for audio and video
- App integrations and workflows
- Connect channels with outside companies
Which business sizes it fits
How Slack lines up with the four business sizes we use across USA24.
Solo
Good fit
Freelancers and one-person businesses
Main Street
Good fit
2–20 employees
Growth
Good fit
20–200 employees
Global
Good fit
Teams across borders
What to check before you buy
Questions to answer, ideally during a free trial or a demo, before you commit:
- Message history limits on the free plan.
- Per-user cost.
- Compliance and retention needs.
- Overlap with tools you already pay for.
- US tax and compliance. Software doesn't replace professional advice on payroll, sales tax or industry rules.
- Getting your data out. Ask how you would export your data if you ever switch.
Pricing
Slack pricing depends on the plan, number of users and add-ons, and vendors change it often. We don't list prices on overview pages; check the current plans on the official Slack website. Our full review will break down the real cost.
Other options in Team communication
Next step
Shortlist it, then test it on real work.
Read our five-step guide to choosing business software, then run Slack through one real week of your work before you decide.