Team Chat and Messaging Software · Video Conferencing Software
Slack review
Channel-based team chat with huddles and Slack Connect, sold per user in Free, Pro, Business+ and Enterprise+ plans.
Slack at a glance
- Starting price
- $8.75/user/month monthly, about $7.25/user/month billed annually (Pro)
- Pricing model
- per user
- Public pricing
- Yes
- Free plan
- Yes
- Free trial
- No
- Contract
- monthly or annual; Enterprise+ via sales
- G2 rating
- 4.5 (37,812 reviews)
- Funding or owner
- Part of Salesforce
- Security
- SOC 2 Type II, SOC 3, ISO 27001, ISO 27017, ISO 27018, ISO 27701, ISO 42001, CSA STAR, FedRAMP Moderate (Enterprise/Enterprise+), GovSlack FedRAMP High, HIPAA configurable, ENS High, C5
- Integrations
- Salesforce
Buying Slack: security, admin and contract
- SAML SSO
- Business+ (SAML); Enterprise+ adds multiple SAML configurations.
- SCIM provisioning
- Business+ and Enterprise+.
- Audit logs
- Enterprise+ only (per pricing FAQ)
- Data residency
- Listed on Business+ and Enterprise+ on pricing page; help center says Enterprise plan required; regions not published.
- Contract
- Monthly billing available on Pro and Business+; Enterprise+ by contract.
- Support
- 24/7 support; Business+ with 4-hour first response; Enterprise+ 24/7 priority with 4-hour first response.
- Public DPA
- Yes, Slack offers Data Processing Addenda (see trust page)
Questions to ask Slack before you sign
- What will the price be at renewal, and is the increase capped?
Questions are listed where Slack's public pages leave the answer open.
Who Slack is for
Choose Slack if
- Teams wanting channel-based chat with a large app ecosystem.
- Companies already on Salesforce.
- Organizations needing SAML SSO plus SCIM on a self-serve plan (Business+)
Look elsewhere if
- Teams that need long free message history (Free keeps 90 days)
- Buyers wanting group video on the free plan (1:1 huddles only)
Slack pricing
| Plan | Price | Unit | Notes |
|---|---|---|---|
| Free | $0 | per workspace | 90-day message history, up to 10 apps, 1:1 huddles only; data deleted after 1 year |
| Pro | $8.75/user/mo monthly; $7.25/user/mo annual (annual price not confirmed on the vendor page) | per user | Group huddles/meetings |
| Business+ | $18/user/mo monthly; $15/user/mo annual (annual price not confirmed on the vendor page) | per user | SAML SSO, SCIM, data residency listed here; 24/7 support with 4-hour first response |
| Enterprise+ | Contact sales | per user | Audit logs, multiple SAML configurations, FedRAMP Moderate authorization |
Slack.com/pricing shows EUR in Germany (Pro 8.25/6.75, Business+ 18/15 EUR monthly/annual). USD monthly prices ($8.75, $18) are from the Salesforce-hosted salesforce.com/products/slack-pricing page; USD annual prices ($7.25, $15) are not directly confirmed on the vendor page. FAQ says annual billing saves about 16%. Intro offer: 50% off for 3 months on monthly online purchases within 7 days of creating a team.
Slack features by buying criteria
| Criterion | What we found |
|---|---|
| Channels and threading | Channels, threads and huddles; Slack Connect for external 1:1 messaging on Free. |
| Built-in video and huddles | Free: 1:1 huddles only; Pro and up: group huddles/meetings (limits not published on pricing page) |
| Search and message history limits | Free: 90-day visible history and data deleted after 1 year; paid plans longer (retention details not verified) |
| App integrations and bots | Free plan limited to 10 apps. |
| Guest and external access | Slack Connect external messaging; Free limited to 1:1. |
| Security and admin controls | SOC 2 Type II and SOC 3, ISO 27001/27017/27018/27701/42001, HIPAA configurable, FedRAMP Moderate (Enterprise/Enterprise+), GovSlack FedRAMP High, C5, ENS High. |
| Mobile app and frontline fit | Frontline teams is an Enterprise+ add-on. |
| Pricing model and transparency | Per user, monthly or annual; Free forever tier. |
| Target company size | Small teams to large enterprises (Enterprise Grid) |
What reviewers say about Slack
Praised for
- Very easy to use (G2 ease of use about 9.1)
- Strong app and integration ecosystem.
Common complaints
- Notification overload and channel sprawl.
- Limited message history on free plan.
Themes paraphrased from public reviews on G2 and similar sites, not quotes.
What most Slack reviews leave out
- Pricing page shows EUR to German visitors; USD monthly prices are $8.75 (Pro) and $18 (Business+)
- SAML SSO and SCIM start at Business+; audit logs are Enterprise+ only per FAQ.
- A help article footnote says SSO/SCIM are available on Free and Pro only for customers who connected a Salesforce org (single source, not verified)
- Enterprise Key Management (EKM) is a paid add-on; data residency per help center requires an Enterprise plan.
- Free plan data is deleted after 1 year and group calls need a paid plan.
Slack alternatives
Microsoft TeamsOrganizations already on Microsoft 365 and Entra ID.$4.00/user/month paid yearly (Teams Essentials)
Zoom WorkplaceTeams whose main need is reliable video meetings with chat attached.$14.16 per user/month billed annually (Pro); $16.99 billed monthly
Google ChatTeams already on Google Workspace that want chat without a second license.$7 per user/month (Workspace Starter, annual commitment billed monthly)
MattermostOrganizations that must self-host or run air-gapped chat.Contact sales
ChantySmall teams wanting cheap per-user chat with tasks.Free up to 5 members; Business 3 EUR per user/month billed annually (EUR only)
ConnecteamFrontline and deskless teams needing scheduling, forms and chat in one mobile app.Free for up to 10 users; paid from $29/month (Basic, first 30 users) per hub
Slack compared
Sources
Every fact on this page comes from Slack's own pricing, product or documentation pages, G2 and company records, checked on October 24, 2026. Unknown values are left out instead of estimated.