Slack vs Smartsheet: Complete Comparison (2026)

Why choose Slack

• Has a free plan (Smartsheet does not)
• Higher Integration score (10/10 vs 7/10)
• Higher Cost score (5/10 vs 4/10)
• Better fit for startups (8/10 vs 4/10)
• Better fit for small business (8/10 vs 5/10)

Why choose Smartsheet

• Higher Analytics score (7/10 vs 3/10)
• Higher Customization score (8/10 vs 7/10)
• Better fit for government (8/10 vs 6/10)
• Better fit for healthcare (7/10 vs 5/10)
• Includes Gantt charts, which Slack lacks

Slack

Pros

• The app ecosystem is very large, and tools such as ClickUp, Notion, HubSpot and Clockify can post updates into channels.
• Slack Connect lets teams work in shared channels with up to 250 outside organizations on paid plans.
• Compliance coverage is broad, including ISO 27001, SOC 2 Type II, FedRAMP Moderate and HIPAA configurability.
• Lists add table and board layouts with assignees, due dates and subtasks, without leaving chat.
• Workflow Builder automates routine requests and approvals without code.

Cons

• There are no native Gantt charts, dependencies, time tracking or portfolio reporting, so Slack doesn't replace a dedicated PM tool.
• Frequent notifications and busy channels can interrupt focus, a common complaint in reviews.
• The free plan keeps only 90 days of message history and allows 10 apps.
• Advanced AI features require Business+ or above, and per-user costs add up as teams grow.
• Reviewers report that finding older messages through search can be difficult.

Smartsheet

Pros

• The spreadsheet grid feels familiar to Excel users and supports strong formulas across sheets.
• One sheet can be viewed as a grid, Gantt chart, board or calendar.
• Its compliance record is strong, including SOC 2, ISO 27001, ISO 42001, FedRAMP and HIPAA support under a BAA on Enterprise.
• Dashboards can be shared with stakeholders who cannot open the underlying sheets.
• Bi-directional Jira and Salesforce connectors plus a well-documented API suit larger IT estates.

Cons

• There is no free plan, and reviewers on Capterra repeatedly call pricing high and restrictive for small teams.
• The 2024 to 2025 move to paid Member licensing ended free collaborators and raised costs for many existing customers.
• Advanced automations are complex to set up, according to reviewers.
• Key capabilities such as Dynamic View, Data Shuttle and Resource Management are sold as extra-cost add-ons or held for top tiers.
• Some users report slow dashboards and performance problems on large sheets.
• Pro allows 250 automations per month and caps teams at 10 Members.