Slack Pricing in 2026: What Free, Pro and Business+ Cost a Small Team

Slack costs $0 on the free plan, $7.25 per user per month for Pro on annual billing, and $15 for Business+. Monthly billing raises those to $8.75 and $18. The free plan keeps only 90 days of message history, so most teams that rely on Slack for records end up paying.

This guide prices Slack for teams of 5, 10 and 25 people, shows where the free plan runs out, and explains when Business+ earns its extra cost. It is written for owners and managers who are deciding whether to stay on free, upgrade or look at a rival. Little iApps tests business software against the question of what a tool costs at your size, not at the headline rate.

What Does Slack Cost in 2026?

Slack lists four tiers in US dollars: Free, Pro, Business+ and Enterprise+. Pro is $7.25 per user per month on annual billing or $8.75 on monthly billing. Business+ is $15 on annual billing or $18 monthly. Enterprise+ is quote-only. The figures come straight from Slack's pricing page.

Slack also runs a promotion. New teams that buy online within seven days of creating a workspace can get 50% off for three months, but only on monthly billing. The offer is described as limited-time and may change. It does not apply to annual plans.

The price is per person on a paid plan. Review your member list before each renewal and remove people who have left, or you keep paying for seats nobody uses.

How Much Does Slack Cost for 5, 10 and 25 People?

Here is what the list prices add up to each year. The math multiplies the per-user rate by the head count and by 12 months. It leaves out taxes and any add-ons.

The gap between annual and monthly billing is real money. For 10 people on Pro, monthly billing costs $180 more per year. For 25 people, it costs $450 more. That is the price of flexibility, and it is worth paying only if your head count is likely to change.

Business+ roughly doubles the Pro bill. For 25 people, the extra $2,325 a year has to buy something you need. The next sections cover what that is.

What Does the Free Plan Actually Limit?

The free plan limits history, apps and huddles. Slack's help center says free workspaces see only the most recent 90 days of message and file history, and they are limited to 10 third-party or custom app installations. Group huddles are not available either, only one-on-one huddles in direct messages.

The 90-day window is the one that bites. Messages older than that are hidden, and Slack's help center says content older than one year is deleted. Upgrading restores access to the previous 12 months, according to the pricing page, as long as the data still exists. You can read the full list in Slack's article on feature limits on the free version of Slack.

There is one wrinkle. Slack's retention table lists "90-day access" while a footnote says one year of storage. In practice, treat 90 days as what you can see and one year as the outer limit of what survives. Do not use the free plan as an archive.

Retention rules matter here too. Slack's help article on message and file retention says custom retention is available on Pro, Business+ and Enterprise+, while free workspaces cannot set it. That means a paid plan lets you decide how long messages live, which matters for client work, HR conversations and anything you may need to produce later.

It also protects you from accidents. Without a rule, a busy channel can bury the one decision you needed. With one, you choose whether to keep everything or clear out chatter on a schedule.

Is Slack Pro Worth It for a Small Team?

Yes, for most teams that use Slack daily. Pro removes the history cap, which is the main reason people upgrade. It also adds custom retention rules, and the app and huddle limits above apply to the free version only.

A simple test helps. Ask whether anyone has searched for a message older than three months in the past quarter. If so, you are already losing value. A customer decision, a vendor quote or an approval often sits in an old thread.

The app limit is the other trigger on the free plan. A team that connects a calendar, a help desk, a file tool, a form builder and a CRM can hit 10 installs quickly. If you also automate work between those apps, see our comparison of Zapier and Make pricing for a small business, because automation costs can add up beside your chat bill.

When Does Business+ Pay Off?

Business+ pays off when you need advanced AI, data exports or stronger controls. Slack's pricing page says Business+ includes advanced AI and ongoing access to Slackbot, subject to plan limits. Slack's retention article adds that Business+ includes data exports for all messages.

AI is where plans differ. Free and Pro get basic AI, such as conversation summaries, workflow generation, AI search, daily recaps and file summaries. Business+ adds the advanced tier and continued Slackbot access. Free users get Slackbot only as a limited trial.

Weigh that against the cost. If your team will not use AI summaries or exports, you are paying $7.75 per user per month extra for features that sit idle. Teams of five or fewer rarely need it. Teams that must keep compliance records often do.

AI pricing is a theme across business tools right now. We broke down a similar credit model in what Notion AI credits cost a small team. Check whether a chat tool's AI is included or metered before you assume it is free.

One more cost belongs in the budget: time. A paid plan with unlimited history saves the hunt for a file link someone pasted in March. If each person loses even 15 minutes a month to that hunt, ten people lose 30 hours a year. At a modest $25 an hour, that is $750, which covers most of the Pro bill for the same team.

Should You Pay Monthly or Annually?

Pay annually if your team size is stable, and pay monthly if you expect to change by more than about 20% in the next year. Monthly billing costs roughly 21% more on Pro. That premium equals about two and a half months of the annual rate.

Annual billing locks in your seat count in a way that matters. If you hire five people in month two, you add seats at the current rate. If you lose five people in month two, you may not get money back. Read the renewal terms before you commit.

The 50% promotion changes the math only for the first three months. After that, the full monthly price applies. A new team that wants to try Pro cheaply can use the promotion, then move to annual billing once the head count settles.

What Are the Alternatives to Paying for Slack?

The main alternatives are Microsoft Teams, Google Chat and a leaner stack of email plus a shared document. If you already pay for Microsoft 365 or Google Workspace, chat may already be included in your bill. Our guide to Microsoft 365 versus Google Workspace pricing shows what each bundle contains.

That can make Slack look like a duplicate cost. It is not always one. Teams that work with outside clients, use many integrations or want a cleaner search often prefer Slack's interface. The decision is about habit as much as price.

Before you switch, count the cost of moving. Channel history, integrations and training all take time. A saving of a few hundred dollars a year can disappear in a week of lost focus.

How Should You Decide?

Start free, upgrade to Pro when history or app limits start to hurt, and consider Business+ only for a named need such as exports or advanced AI. Audit seats at every renewal. Choose annual billing once the team is stable.

A short checklist keeps the decision honest:

At Little iApps, we put the per-user math first because headline prices hide seat creep. A tool that costs $7.25 for one person can cost $2,175 a year for 25. Run the numbers for your own head count, and confirm the current rates on Slack's page before you buy, since prices and promotions can change.