Slack's four pricing tiers and what each one includes

Slack offers four subscription plans: Free, Pro, Business+, and Enterprise Grid. The Free plan costs nothing and includes unlimited messaging, 10,000 most recent messages searchable, and basic integrations. The Pro plan costs $8.75 per user per month (billed annually) or $12.50 per user per month (billed monthly). Business+ costs $12.50 per user per month (billed annually) or $15 per user per month (billed monthly). Enterprise Grid has custom pricing that you request directly from Slack's sales team.

Each paid tier builds on the one below it. Pro adds unlimited message history, priority support, and more integrations. Business+ adds advanced security features, compliance tools, and the ability to manage multiple workspaces from one admin panel. Enterprise Grid is designed for organizations with thousands of users and includes custom contracts, dedicated support, and features like advanced user provisioning.

Slack charges per active user, not per seat. An active user is someone who has posted a message, read a message, or used Slack in any way during the billing period. If a user is inactive for a full month, you are not charged for that month. This means your bill changes month to month based on actual usage.

Key Takeaways

  • Free Slack includes unlimited messaging but only shows your 10,000 most recent messages, while Pro and Business+ give you full message history.
  • Pro costs $8.75 to $12.50 per active user per month depending on how you pay, and Business+ costs $12.50 to $15 per active user per month.
  • You pay only for users who are active in a given month, so your bill fluctuates if team members take time off or leave.
  • Enterprise Grid pricing is custom and requires contacting Slack's sales team directly.

How to calculate your monthly bill

Your Slack bill is the number of active users multiplied by the monthly rate for your plan. If you have 10 active users on the Pro plan billed monthly, your bill is 10 × $12.50 = $125 per month. If you switch to annual billing, the same 10 users cost 10 × $8.75 × 12 = $1,050 per year, or $87.50 per month on average.

Annual billing saves you about 30 percent compared to month-to-month billing. However, you pay the full year upfront. If your team size is uncertain, monthly billing lets you adjust without penalty. Slack does not prorate refunds if you downgrade mid-month, so switching plans takes effect on your next billing date.

The number of active users can shift from month to month. If three team members are on vacation and do not use Slack that month, you are not charged for them. Conversely, if you add a contractor or consultant who uses Slack for one month, you pay for that month only. Check your workspace settings to see the current active user count before your billing date.

What features you lose on the Free plan

The Free plan is genuinely useful for small teams or temporary projects, but it has real limits. You can see only the 10,000 most recent messages in your workspace. Once you exceed that, older messages are still there but not searchable or visible in the interface. For a team of five people messaging daily, you hit this limit in roughly two to three weeks.

Free also limits integrations to a basic set and does not include Slack's workflow automation tools. You cannot set up single sign-on (SSO) or enforce security policies like requiring two-factor authentication. Guest accounts are not available on Free. If you need to bring in a contractor or client to a specific channel, you must upgrade to Pro or higher.

Free workspaces have slower support response times and no dedicated support contact. If something breaks, you are directed to Slack's help center and community forums. For a business that depends on Slack for daily operations, Free becomes expensive in lost productivity within the first month.

Pro plan features and when to choose it

Pro is the most common choice for small to medium teams. It includes unlimited message history, so you can search and reference conversations from years ago. You get priority support with a may provide response time, and you can set up single sign-on through Google, Microsoft, or other identity providers. Workflows—Slack's automation tool—are included, letting you create straightforward automations without writing code.

Pro also includes guest accounts, so you can invite external people to specific channels without giving them access to your entire workspace. You can set up up to 10 custom integrations and use Slack's app directory to connect tools like Salesforce, Jira, or Asana. Most small businesses and startups stop at Pro because the jump to Business+ adds features they do not need.

Choose Pro if your team is between 5 and 50 people, you need searchable message history, and you want to bring in occasional outside collaborators. If you have fewer than five people and message volume is light, Free may still work. If you have compliance requirements or manage multiple teams, Business+ is more practical.

Business+ plan features and when to choose it

Business+ adds compliance and security tools that matter for regulated industries or large organizations. It includes data loss prevention (DLP), which scans messages for sensitive information like credit card numbers or social security numbers and blocks them before they are sent. You get audit logs that record who accessed what and when, which is required for HIPAA, SOC 2, or PCI compliance.

Business+ also includes advanced permission controls, allowing you to restrict who can create channels, invite guests, or export data. You can manage multiple workspaces from a single admin panel, which is essential if you have separate Slack workspaces for different departments or clients. Slack Connect—which lets you share channels with other organizations—is included.

Choose Business+ if you are in healthcare, finance, legal, or another regulated field. Choose it if you have more than 100 active users and need centralized administration. Choose it if you regularly work with external partners and need to control what information leaves your workspace. If you are a small business with no compliance requirements, Pro is usually enough.

Enterprise Grid and custom pricing

Enterprise Grid is Slack's largest plan, designed for organizations with thousands of users across multiple teams. Pricing is not published because it is negotiated based on your organization's size, contract length, and feature needs. You contact Slack's sales team to request a quote.

Enterprise Grid includes everything in Business+ plus advanced features: custom data retention policies, advanced user provisioning and deprovisioning, dedicated technical support with a named account manager, and the ability to create unlimited workspaces under one organization. You also get priority access to new Slack features and the option to customize the platform for your specific needs.

Most organizations do not need Enterprise Grid until they have 500+ active users or complex multi-team governance requirements. If you are considering it, contact Slack's sales team directly—they can often negotiate better rates than the published per-user pricing for large commitments.

Free trials and switching between plans

Slack does not offer a free trial of paid plans. You start on Free and upgrade whenever you are ready. When you upgrade, your first billing cycle begins when ready. If you upgrade mid-month, you are charged a prorated amount for the remainder of that month, then the full monthly amount on your next billing date.

You can downgrade at any time. Downgrading takes effect on your next billing date. If you downgrade from Business+ to Pro, you keep all your messages and data—nothing is deleted. However, some features stop working when ready. For example, if you downgrade and lose access to Slack Connect, any shared channels are archived and no longer visible to external partners.

If you are unsure whether to upgrade, use Free for a few weeks and watch your message volume. If you regularly hit the 10,000-message limit or need to search old conversations, Pro is the right move. If you need compliance features, jump to Business+. Most teams know within a month whether Free is sustainable.

Frequently Asked Questions

Do I pay for inactive users?

No. Slack charges only for active users in a given month. An active user is someone who has used Slack at least once during the billing period. If a team member takes a month off or leaves the company, you are not charged for that month.

Can I switch plans mid-month?

Yes. When you upgrade, you are charged a prorated amount for the remainder of the current month, then the full monthly rate on your next billing date. When you downgrade, the change takes effect on your next billing date, and you are not refunded for the current month.

What happens to my messages if I downgrade to Free?

Your messages stay in Slack, but you can only see the 10,000 most recent ones. Older messages are still stored but not searchable. If you upgrade again later, your full message history becomes visible again.

Is there a discount for annual billing?

Yes. Annual billing costs about 30 percent less per month than month-to-month billing. You pay the full year upfront. If your team size is uncertain, monthly billing gives you more flexibility.

Can I use Slack for free permanently?

Yes. The Free plan has no expiration date. You can use it indefinitely, though you are limited to 10,000 searchable messages and basic features. Many small teams and open-source projects use Free long-term.