Slack Pricing 2026: Full Guide to Selecting the Right Plan

Slack pricing starts at $0, but the number that decides your budget is $7.25 per active user per month on Pro, billed annually. That is the plan most 5-to-100-person operating teams land on.

The gotcha sits below the sticker price. Slack bills active members rather than purchased seats, and one multi-channel guest costs exactly the same as a full-time employee.

I treat Slack the way a finance team treats a renewal line item. This guide calculates total cost at 5, 10, 25, 50, and 100 active members, ranks the hidden costs by how much they move the invoice, maps every plan gate that forces an upgrade, and names the buyers who should not pay for Slack at all.

If Slack is still one name on a longer shortlist, start with the wider roundup of best team collaboration tools and come back here once Slack survives the first cut.

All figures below are US list prices in USD, checked against Slack’s official pricing and help documentation on July 11, 2026. This analysis is documentation-based, not a hands-on workspace test.

Quick Pricing Verdict

Here is the whole Slack pricing decision in one table, before the detail.

Executive Summary: Slack TCO at 5 to 100 Users

Annual billing is the only sane starting point for a budget, so every figure here assumes an annual commitment at the standard list rate.

The Business+ premium works out to $93 per user per year at annual rates. That single number is the whole upgrade decision, and I would not spend it on AI alone.

At 100 people the same choice is a $9,300 annual swing, which is enough to fund a headcount conversation. Buy Business+ when SAML, SCIM, data residency, conditional workflows, or private-channel exports are hard requirements, not when someone liked the AI demo.

Slack Pricing Plans Compared in 2026

Slack sells four plans on its official pricing page. Two carry public US list prices, one is free, and one is quote-only.

The gap that matters is not Free to Pro. It is Pro to Business+, because that is where identity, compliance, and automation stop being optional and start being billable.

Two of these plans have a price you can plan against. Enterprise+ does not, and any article quoting a per-seat Enterprise+ figure is guessing.

Line-Item Cost Breakdown: Every Billable Item on a Slack Invoice

Slack pricing is not a normal seat contract, and the difference shows up on the first invoice. Most SaaS subscription models bill the seats you purchase, while Slack bills the people who show up.

Slack bills active members, not purchased seats

Under Slack’s Fair Billing Policy, you pay for members who are active in the workspace. An invited person starts generating a charge once they accept and become active, prorated for the remainder of the billing period.

When a paid member goes inactive, Slack can issue a prorated credit toward future charges rather than leaving the seat billing forever. If every member in a workspace goes inactive, the billing floor is the equivalent of one paid member.

For a 40-person agency with seasonal contractors, that model is materially cheaper than a fixed-seat contract. For a workspace where everyone logs in daily, it behaves exactly like per-seat pricing and offers no relief.

Fair Billing rewards teams that deactivate people promptly. It does nothing for teams that leave dormant accounts alive out of habit.

Guests are the largest controllable line item

This is where agencies and client-service teams either save thousands or quietly double their bill. Slack’s guest-role documentation draws a hard line between the two guest types.

A multi-channel guest is billed at the regular active-member rate. A single-channel guest is free, up to five single-channel guests per paid active member.

Run the math on a 10-person agency on Pro annual billing. The base cost is $870 per year, and the five-to-one allowance gives that agency up to 50 free single-channel guests.

Give twelve clients a single channel each and the incremental cost is $0. Give the same twelve clients multi-channel access and you add twelve billable seats at $87 per year, which is $1,044 more, taking the invoice to $1,914.

The channel architecture, not the headcount, sets the price. I would design guest roles before I negotiate anything.

There is no general three-seat minimum

Several widely read pricing guides claim Slack requires three paid users. That claim does not survive contact with Slack’s own billing documentation.

Fair Billing describes a floor equivalent to one paid member when everyone else goes inactive. The three-active-member rule that keeps getting repeated is an invoice-payment condition, not a subscription minimum.

A solo consultant can buy one Pro seat. A two-person studio can buy two.

Invoice payment carries its own thresholds

Slack’s supported-payment-methods documentation sets separate rules for paying by invoice instead of card: annual billing, at least three active members, and a minimum account size. The published examples are at least 58 Pro members or 28 Business+ members, with a roughly $5,000-equivalent threshold applied to many discounted plans.

Run those member counts against the annual rates and the pattern is obvious. 58 Pro members at $87 per year is $5,046, and 28 Business+ members at $180 per year is $5,040.

The seat thresholds are a $5,000 annual-spend floor wearing a costume. Slack also discloses that a remittance fee applies to invoice payments, though it does not publish the amount.

If your finance team refuses to pay software by credit card, that $5,000 floor is a real constraint on a 20-person Pro workspace.

Slack Connect can move cost onto the other company

Shared channels are not free collaboration for everyone. Slack Connect channels generally require each participating organization to be on an eligible paid plan, while external direct messages are available more broadly.

A client on the Free plan may be unable to join your shared channel. Budget for the possibility that your side pays and your partner still cannot participate the way you planned.

What Each Slack Plan Includes

Slack Free: $0

Free gives you channels, direct messages, one-to-one huddles, and 10 app integrations. That is enough to find out whether your team adopts channel-based work at all.

The limits are aggressive and widely misreported. Slack’s Free plan documentation sets 90 days of accessible message and file history, and separately states that data older than one year is permanently deleted.

Those are two different limits, and the difference is worth real money. Between day 91 and the one-year mark, your history is hidden rather than destroyed, so upgrading can restore access.

After one year, it is gone and no upgrade brings it back.

Missing: full history, group huddles, Slack Connect channels, unlimited apps, guest roles, Workflow Builder, custom retention, and paid AI.

Avoid Free if: you need to find a decision made four months ago, you invoice clients from Slack threads, or you run any process where the message record is the record.

Verdict: Free is a 60-day adoption test, not a plan. Treat the one-year deletion clock as the deadline to decide.

Slack also offers a paid trial rather than only the Free plan. Eligible workspaces can request a Pro or Business+ trial without a credit card, and the workspace reverts to Free if nobody upgrades.

Slack does not publish one universal trial length that applies to every workspace. Check the duration shown when you request it, and build the evaluation schedule around that number rather than a figure quoted on a third-party blog.

Slack Pro: $7.25 annual, $8.75 monthly

Pro is the practical tier and the plan I recommend for most buyers reading this. It adds full message history, unlimited app integrations, group huddles, Slack Connect channels, Workflow Builder, custom retention, 24/7 support, conversation summaries, and huddle notes.

Missing: standard SAML SSO, SCIM provisioning, data residency, all-message exports covering private channels and DMs, conditional workflow branching, and the advanced AI set.

Avoid Pro if: your security team has already written SAML into the requirements, or legal needs to export private channels and direct messages.

Verdict: at $87 per active user per year, Pro is the only Slack plan whose price and value line up cleanly for a 5-to-100 person team.

Slack Business+: $15 annual, $18 monthly

Business+ is the compliance and identity tier, and the price reflects that at $180 per active user per year. It adds standard SAML SSO, SCIM provisioning, data residency, broader exports, administrative analytics, and a support target of four hours to first response.

It also adds the advanced AI set: recaps, translations, file summaries, search answers, workflow generation, and Slackbot.

Here is the catch buyers keep missing. Slackbot on Business+ is limited to 15 messages per user per week, resetting Monday at midnight in the user’s time zone, according to Slack’s Slackbot documentation.

Fifteen messages a week is a ceiling of 780 per user per year. A team upgrading purely for Slackbot pays the $93 per-user annual premium for at most 780 messages.

That is about $0.12 per message at full use, and worse than that for every user who never reaches the cap.

Missing: native DLP, audit logs, legal holds, HIPAA support, EMM, enterprise search, single-user exports, and multi-workspace administration.

Avoid Business+ if: AI is the only reason on the business case. The weekly cap will not survive contact with an enthusiastic 50-person team.

Verdict: Business+ earns its price on identity, provisioning, residency, and export scope. It does not earn its price on Slackbot.

Slack Enterprise+: custom pricing

Enterprise+ is quote-only, and I will not estimate it. Slack’s pricing page routes it to sales, and the third-party figures floating around the search results are not Slack list prices.

What it adds is a control set, not a seat discount: enterprise search, multi-workspace administration, native DLP, audit logs, legal holds, HIPAA support, EMM, single-user exports, and Discovery API access.

Avoid Enterprise+ if: you are considering it because you have 800 employees rather than because you have a named control requirement. Headcount alone is a bad reason to enter a custom sales process.

Verdict: ask for the quote only when you can name the specific control that Business+ cannot provide. Then ask what it costs to keep that control at renewal.

Feature Gates: What You Actually Get by Plan

Read that table as an upgrade-trigger list rather than a feature inventory. Only four rows realistically force a paid upgrade for a normal team: history, SAML, export scope, and enterprise compliance controls.

Slack AI: what Pro gets and what Business+ adds

Slack repackaged AI in 2025, and a lot of the search results have not caught up. The standalone Slack AI add-on is no longer sold for new website purchases, and advanced AI now sits inside the Business+ and Enterprise+ plans.

Pro is not AI-free. It includes conversation summaries and huddle notes, which covers the two things most teams asked for.

Business+ adds recaps, translations, file summaries, search answers, workflow generation, and Slackbot at the 15-message weekly cap. Enterprise+ is the only plan with enterprise search.

Legacy customers who bought the old AI add-on may keep their arrangement until the relevant renewal transition. If a vendor quote still contains a standalone AI line item, ask what happens to it at renewal before you sign.

Single sign-on: the SAML gate and the Salesforce exception

SSO is the most common reason a team pays $93 more per user per year, and it is also the most commonly misdescribed. Work through it in this order.

Do you only need Google sign-in? Google authentication and Google SAML are different configurations in Slack, and they do not sit at the same plan level. Confirm which one your identity policy requires before you assume Business+.

Is your Slack workspace connected to Salesforce? Slack’s SAML documentation describes an exception that can put SAML in reach of qualifying Free or Pro workspaces.

For a revenue-operations team already standardized on Salesforce, that exception is worth a direct question to Slack before you upgrade for identity alone.

Neither applies? Standard SAML SSO sits on Business+ and Enterprise+, and SCIM provisioning sits at the same gate. That is the upgrade, and it is a real one.

The cost of getting this wrong is not theoretical. A 60-person team that upgrades to Business+ purely for SAML spends $5,580 more per year than it would on Pro.

Exports, retention, and the compliance trigger

Feature tables say “data export” and stop. Slack’s export documentation is far more specific, and legal buyers need the specifics.

Business+ does not hand you private-channel exports at checkout. Slack requires an application, and approval depends on qualifying, so I would not sign a Business+ contract on the assumption that the export you need is guaranteed.

Paid plans keep workspace data for the life of the workspace by default and allow custom retention. That default is generous, and it is also a discovery liability if nobody sets a policy.

The Business+ versus Enterprise+ compliance trigger

Do not pick Enterprise+ by company size. Pick it by control requirement.

If none of the Enterprise+ rows appear in your security questionnaire, you are shopping in the wrong tier. A 400-person software company with no HIPAA exposure and no legal-hold obligation can run on Business+ without apology.

Automation and API limits

Slack sells “unlimited integrations” on paid plans, and that phrase is doing a lot of work. The installation allowance is unlimited.

The data access is not.

Workflow Builder is available on paid plans, but conditional branching requires Business+ or Enterprise+. Webhook-triggered workflows are limited to one request per second, which is a hard ceiling for anyone routing alerts from a monitoring system.

The bigger trap is on the API side. Under Slack’s 2025 rate-limit changelog, affected commercially distributed non-Marketplace apps face one request per minute on conversations.history and conversations.replies, with a 15-message maximum response size.

That is roughly 900 messages an hour for an archiving or analytics tool built outside the Marketplace. If your compliance vendor needs to backfill two years of channel history, model that limit before you commit, because no Slack plan buys your way out of it.

Internal custom apps and Marketplace apps are treated differently, so what an API is rated to do matters more here than the plan you bought.

Annual vs Monthly: The Real Savings Math

Slack’s annual discount is real, consistent, and worth taking.

Applied to a real team, the premium for staying flexible adds up fast. A 50-person Business+ workspace pays $1,800 more per year on monthly billing, and a 100-person one pays $3,600 more.

There is one reason to accept that premium. If you are inside the first 90 days of rollout and adoption is genuinely uncertain, monthly billing is cheap insurance against a 12-month commitment to a tool nobody opened.

One warning on promotions. Slack’s live pricing page can display time-limited introductory discounts, and a promotional acquisition price is not a renewal price.

Build your budget from the standard list rate. Then check the checkout screen and the renewal terms before you sign anything.

Add-Ons, Overages, and Surprise Costs

These are the Slack pricing items that never appear on a plan card, ranked by how much each one moves a real invoice.

Two of these have no public number at all. Enterprise Key Management and Slack Atlas are add-ons, not included features, and any enterprise TCO that ignores them is fiction.

“Unlimited integrations” is a Slack entitlement, not a software budget. The connected vendors bill you separately, and the connected app stack can easily cost more than the Slack subscription itself.

Real Cost Scenarios: 5, 10, 25, 50, and 100 Users

Every figure assumes all listed people are active paid members for the full year, at standard US list rates, before tax, promotions, negotiated discounts, third-party apps, and custom add-ons.

The 25-person row is the one I would frame and hang on the wall. Pro costs $2,175 and Business+ costs $4,500, so the AI demo has to be worth $2,325 a year before it wins the argument.

At 100 people, Business+ at $18,000 is the last number Slack will publish. Anything past that is a negotiation, and you should walk into it with a control requirement rather than a headcount.

Which Slack Plan Should You Choose?

Solo consultants and 2-to-4 person studios: Pro. There is no three-seat minimum, so buy the seats you have. At $87 per person per year, Pro removes the 90-day history limit that makes Free unusable for client work.

5-to-25 person operating teams: Pro. This is the plan Slack is priced for, and almost nothing in Business+ changes a 15-person team’s daily work. Spend the difference on the integrations your team opens every day.

Agencies and client-service teams: Pro, with a guest-role plan written down first. Single-channel guests are free within the five-per-paid-member allowance, and multi-channel guests are not. Decide the channel structure before you send the first client invite.

Teams with an identity provider and a compliance owner: Business+. SAML, SCIM, data residency, and broader export scope all sit at the same gate, and buying them separately is not an option. Confirm the Salesforce-connected SAML exception does not already cover you.

Regulated and multi-workspace organizations: Enterprise+. Enter that conversation with a written list of the controls Business+ cannot provide, and ask for the price of keeping them at renewal.

Nonprofits and schools: check eligibility before you do any of the above. The discounts are large enough to change the answer entirely.

Which Slack Plan Should You Avoid?

Avoid Free for any team where the message record is the record. The 90-day visibility limit hides your history, and the one-year rule deletes it. A design agency that loses the thread where a client approved a scope change has lost something worth more than $435 a year.

Avoid Business+ when AI is the only line on the business case. Slackbot is capped at 15 messages per user per week, and a 50-person team that upgrades for AI is paying $4,650 a year for an allowance a heavy user can exhaust in a single day.

Avoid Enterprise+ when the only argument is headcount. A custom sales process with no named control requirement produces a quote you cannot evaluate and a renewal you cannot defend.

The exception on Free is real, though. A 4-person team in month one, still deciding whether channels beat group chat, should not pay Slack anything yet.

Who Should Not Buy Slack at All

Per-active-member pricing scales beautifully for employee teams and badly for everyone else.

Large open communities. A 3,000-member community where participation is intermittent is exactly the shape that per-active-member billing punishes. Community operators keep asking about this on public forums, and the pricing model has no answer that makes it affordable.

Passive-reader networks. If most participants read and rarely post, you are paying full member rates for an audience, not a team.

Slack does not publish a read-only seat option, so there is no cheap tier to demote those people into.

Long-running projects with many occasional participants. Contractors who touch the workspace once a month still count as active members in the months they show up. The bill tracks activity, not value delivered.

Teams already paying for Microsoft 365. If Microsoft Teams is already bundled and adoption is fine, adding Slack means paying twice for the same job.

That is a duplicate-tooling argument rather than a pricing one, and finance usually wins it at renewal.

Slack Pricing vs Competitors

Prices below are standard US list rates checked on each vendor’s official pricing page on July 11, 2026. This is not a like-for-like table, and the warning matters more than the numbers.

The headline finding is uncomfortable for Slack. Microsoft 365 Business Basic costs $840 a year for 10 people and Slack Pro costs $870, and the Microsoft price includes an entire productivity bundle while Slack’s includes messaging.

That does not make Slack overpriced. It makes Slack a specialist purchase you justify on adoption, integration depth, and how much of the work happens in channels rather than email.

Microsoft Teams and Microsoft 365

Microsoft Teams Essentials at $4 per user per month paid yearly is the cheapest line in this table, at $480 a year for 10 people. That is 45% below Slack Pro for chat and meetings.

The sharper comparison is Microsoft 365 Business Basic at $7 per user per month paid yearly. At $840 a year for 10 people it undercuts Slack Pro while carrying Teams inside a bundle many buyers already pay for.

The switching question is rarely about features. It is about whether your team will move its daily conversation into a tool the company bought for email.

Slack has to win on channel adoption, integration depth, and Slack Connect, because it will not win on price. The Microsoft Teams review sets out where the bundled option is good enough and where it breaks.

Google Workspace

Google Workspace Business Starter lists at $7 per user per month on an annual commitment, or $840 a year for 10 people. Google can also run temporary new-customer promotions, so confirm the renewal rate rather than the acquisition rate.

For a Google-native team, chat already arrives inside a suite bought for mail, meetings, and files. Slack then has to justify $870 a year on top of that.

It clears that bar when work genuinely lives in channels. It does not clear it when Slack is a second inbox people check out of guilt.

The honest test is whether the team would notice if Slack went dark for a week. If the answer is no, the bundled chat layer is already enough.

Our Google Workspace review covers how far that layer carries a 10-person team before it starts to hurt.

Zoom Workplace

Zoom Workplace Pro starts at $14.16 per user per month, which is about $1,699 a year for 10 people at the starting rate. That is nearly double Slack Pro.

Zoom is meetings-first with chat attached, and Slack is chat-first with huddles attached. A team whose day is built around scheduled calls will get more from Zoom than from a second messaging bill.

The overlap between them is real but shallow. Slack huddles do not replace a webinar platform, and Zoom Team Chat does not replace channel-based operations at 50 people.

Plenty of organizations end up running both, and the budget should assume that rather than hope for consolidation. The Zoom Workplace review covers where its chat layer holds up and where it does not.

Asana

Asana Starter costs $10.99 per user per month billed annually or $13.49 billed monthly, which is $1,318.80 a year for 10 people. That is the second most expensive row in this table, for a product that does a different job.

Asana is work management. It tracks tasks, owners, and due dates, and it does not carry the conversation layer Slack owns.

Teams that run both are buying two tools, not choosing between them. A 25-person team on Slack Pro and Asana Starter is at $5,472 a year before a single other app is added.

The failure mode I see most often is a team buying a project tool as a chat replacement, then wondering why nobody posts in it. The Asana review is the place to check that boundary before you commit.

If the real problem is invisible work rather than scattered conversation, a cheaper Slack plan will not fix it. Downgrading Slack to Free to fund Asana is the worst of both outcomes, because you lose the history and the work is still not legible.

A 10-person agency running Slack Pro and Asana Starter pays $2,188.80 a year for the pair. That is a defensible number, and it is easier to defend when each tool owns a distinct job.

Budget for both, or pick the one that solves the problem you have today. The Asana pricing tiers show what the work-management side costs before you commit to two subscriptions.

Slack Discounts for Nonprofits and Education

These two programs are ignored by nearly every pricing guide, and they can reverse the entire recommendation.

Qualified nonprofits can receive Slack Pro free for up to 250 members, with 85% discounts available in specified cases for larger Pro or Business+ deployments. A 200-person nonprofit that would otherwise budget $17,400 a year for Pro may pay nothing.

Qualified educational organizations can receive an 85% discount on eligible Pro or Business+ subscriptions. At 85% off the $15 annual rate, Business+ works out to about $2.25 per active user per month, which is well under the standard Pro price and changes which tier is rational.

Eligibility is not automatic and Slack reviews applications. Verify your status before you build a budget around it, because the gap between list price and discounted price is too large to guess at.

What Changed in Slack Pricing, and What Is Still Wrong Online

Slack restructured plans and AI packaging in 2025, which is why so many current-looking pricing pages are quietly wrong. Four corrections are worth making explicitly.

Pro annual is $7.25, not $8.75. The official Slack Pro pricing page shows $7.25 on annual billing and $8.75 on monthly billing.

Several pages, including an earlier version of this one, presented $8.75 as the annual price.

Enterprise+ has no published price. A $45 per-user figure circulating in procurement content is not a Slack list price, and Slack routes Enterprise+ to sales.

Free data is not deleted at day 90. It becomes inaccessible at day 90 and is permanently deleted after one year, which are different problems with different remedies.

The standalone Slack AI add-on is no longer sold for new website purchases. Advanced AI is packaged into Business+ and Enterprise+, and legacy add-on arrangements transition at renewal.

If a pricing page you are reading still contains any of those four errors, the rest of its math is downstream of a wrong number. That is also why every figure in this guide carries a checked date rather than the word “latest”.

Is Slack Worth the Price?

Worth it if your team already routes work through channels, your integration stack is deep, and searchable history is part of how decisions get made. At $87 per active user per year, Pro is cheap against a single rehashed decision.

The product case, as opposed to the price case, is set out in the Slack review.

Worth it if you collaborate with clients or partners and can structure most of them as single-channel guests. The free guest allowance is the strongest cost lever in Slack’s pricing model, and it is easy to lose by defaulting new external people to multi-channel access.

Not worth it if Microsoft 365 or Google Workspace is already paid for, adoption of the bundled chat tool is acceptable, and nobody is complaining. Paying $870 a year for 10 people to duplicate a tool you already own is a hard sell at renewal.

Compare the suite tiers against the standalone bill before you argue for Slack. The Google Workspace pricing guide shows what each Business plan already covers.

Not worth it if your workspace is a community rather than a team. Per-active-member pricing was not built for audiences.

The Buyer Risk Ledger

The 30/90-Day Adoption Test

At 30 days, channel count should be growing slower than message volume. If people are creating channels faster than they are talking in them, you bought a filing cabinet.

At 90 days, three things must be true. Search is where people look first, at least two integrations are used daily, and nobody has asked to move a recurring decision back to email.

If those are not true by day 90, cancel before the Free plan’s one-year deletion clock removes the option to leave cleanly.

The Renewal Question

Before you renew, answer one thing: how many billable members opened Slack in the last 30 days? If the answer is under 70% of your paid count, you are not renewing a tool, you are renewing a habit.

How to Avoid Overpaying for Slack

Each tip below attacks a specific line on the invoice rather than the headline Slack pricing number.

1. Pay annually. The premium for monthly billing is $1.50 per user per month on Pro and $3.00 on Business+, which is roughly a 17% surcharge for flexibility you probably will not use after day 90.
2. Default external people to single-channel guest. Every paid member buys five free single-channel guests. A 10-person team has room for 50 of them at no cost, and one careless multi-channel invite costs $87 a year.
3. Deactivate leavers on their last day. Slack bills active members and can credit the account when a paid member goes inactive, so offboarding discipline is a direct line-item saving.
4. Do not buy Business+ for AI. The Slackbot cap of 15 messages per user per week is the whole answer to that business case.
5. Test the SAML exception before you upgrade. If your workspace is connected to Salesforce, ask Slack directly whether the documented Free or Pro exception applies to you. That question is worth $93 per user per year.
6. Check nonprofit and education eligibility first. Qualified nonprofits can get Pro free up to 250 members, and qualified schools can get 85% off, which makes every other tip on this list irrelevant.
7. Budget the app stack, not just the seats. Unlimited integrations means unlimited installs, not free software, and the connected vendors bill you separately.
8. Verify the renewal price, not the promo price. Any introductory discount on the pricing page is an acquisition rate. Ask what year two costs before you commit to year one.

FAQ

How much does Slack cost per month?

Slack Pro costs $7.25 per active user per month when billed annually, or $8.75 when billed monthly. Business+ costs $15 annually or $18 monthly per active user. Free is $0, and Enterprise+ is a custom quote with no published US list price. All prices were checked on Slack’s official pricing pages on July 11, 2026.

Is Slack free for business use?

Yes, but with limits that break most real businesses. The Free plan gives you 90 days of accessible message and file history, 10 app integrations, and one-to-one huddles only. Data older than one year is permanently deleted. Free works as an adoption test, not as the system of record for client work or decisions.

Does Slack charge for inactive users?

No. Under the Fair Billing Policy, Slack bills active members rather than purchased seats, and it can issue a prorated credit toward future charges when a paid member becomes inactive. New members start generating charges once they accept the invitation and become active. If everyone goes inactive, the billing floor is the equivalent of one paid member.

Does Slack charge for guest accounts?

It depends entirely on the guest type. A multi-channel guest is billed at the regular active-member rate, which is $87 per year on Pro annual billing. A single-channel guest is free, up to five single-channel guests for every paid active member. A 10-person Pro workspace can host 50 single-channel guests at no extra cost.

Which Slack plan includes SSO?

Standard SAML single sign-on sits on Business+ and Enterprise+, alongside SCIM provisioning. Slack documents an exception that can extend SAML to qualifying Free or Pro workspaces connected to Salesforce. Google authentication and Google SAML are separate configurations, so confirm which one your identity policy requires before you upgrade for it.

How long does Slack keep messages on the Free plan?

Two different limits apply, and they are often confused. Message and file history stays accessible for 90 days, after which it is hidden from search and scrollback. Data older than one year is permanently deleted under the current Free plan policy. Upgrading can restore hidden history, but nothing restores data that has already passed the one-year deletion point.

Is Slack AI included in the subscription price?

Yes, in the current packaging. Pro includes conversation summaries and huddle notes. Business+ and Enterprise+ include the advanced set, though Slackbot on Business+ is limited to 15 messages per user per week, resetting Monday. Enterprise search is Enterprise+ only. The standalone Slack AI add-on is no longer sold for new website purchases.

How much is Slack Enterprise+?

Slack does not publish a US list price for Enterprise+. The plan routes to sales, and pricing depends on seats, term, and contract scope. Third-party estimates circulating online, including a $45 per-user figure, are not Slack list prices. Ask for a written quote that names the included controls, allowances, support terms, and renewal conditions.

Does Slack have a minimum number of users?

No general three-seat self-service minimum applies. Slack’s Fair Billing documentation describes a floor equivalent to one paid member. The three-active-member rule that appears in other guides is one condition for paying by invoice rather than card, alongside annual billing and a minimum account size of roughly $5,000 in annual value.

Is Slack cheaper than Microsoft Teams?

No. Microsoft Teams Essentials is $4 per user per month paid yearly, and Microsoft 365 Business Basic with Teams is $7, compared with $7.25 for Slack Pro on annual billing. For 10 people that is $480, $840, and $870 per year respectively. Slack is a specialist purchase, and it wins on channel adoption and integration depth, not on price.

Final Verdict

Buy Slack Pro on annual billing if you are a 5-to-100 person operating team, and treat $7.25 per active user per month as the real Slack pricing baseline. Move to Business+ only when SAML, SCIM, data residency, conditional workflows, or private-channel exports become requirements someone has written down.

Do not buy Slack for a community, do not buy Business+ for Slackbot, and do not enter an Enterprise+ sales process without a named control requirement.

If channels are not where your work happens, no Slack tier will fix that, and a project management platform is the better place to spend the budget.

Prices verified against Slack’s official US pricing and help documentation on July 11, 2026, by Macedona for SaaS CRM Review. Slack can change prices, promotions, and AI allowances at any time, so confirm the rate at checkout before you commit.

About the author

Macedona

Macedona is the founder and lead reviewer at SaaS CRM Review, where he has published 175+ in-depth reviews, pricing guides, and comparisons of CRM and SaaS tools. Each review is based on hands-on testing or verified documentation, and every article states clearly which method was used. Pricing and features are checked against official vendor sources, with the verification date noted in the article. Macedona follows a published review methodology and editorial policy. SaaS CRM Review earns affiliate commissions from some links, which never influence ratings or rankings. Read the full affiliate disclosure.

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