Planisware vs Slack: Complete Comparison (2026)
An in-depth comparison of Planisware and Slack to help you choose the right tool for your business.
Last updated: November 2026
Planisware
6.4/10
Enterprise project portfolio management platform from France for planning budgets, schedules, resources and portfolios across large, complex organizations.
Slack
7.1/10
Slack is a channel-based messaging platform from Salesforce, with Lists, canvases, huddles and Workflow Builder for team coordination and light task tracking.
Feature-by-Feature Comparison
| Feature | | |
|---|---|---|
| Scores | ||
| Overall Rating | 6.4/10 | 7.1/10 |
| Integration | 7/10 | 10/10 |
| Analytics | 8/10 | 3/10 |
| Customization | 9/10 | 7/10 |
| Ease of Use | 4/10 | 7/10 |
| Support | 5/10 | 6/10 |
| Cost | 3/10 | 5/10 |
| Scalability | 9/10 | 9/10 |
| Security | 9/10 | 9/10 |
| Pricing | ||
| Free plan | No | Yes |
| Cheapest paid plan | Contact for pricing | €8/user/mo Pro |
| Estimated cost for 10 users | Contact for pricing | Free Free |
| Features | ||
| Scheduling | Not listed | |
| App integrations | ||
| Gantt charts | ||
| Task management | ||
| Workflow automation | ||
| Dashboards | Not listed | |
| Collaboration tools | ||
| Reporting | Not listed | |
| Team messaging | Not listed | |
| Docs | Not listed | |
| Spreadsheet interface | Not listed | |
| File sharing | Not listed | |
| Client collaboration | Not listed | |
| Task lists | Not listed | |
| Time tracking | Not listed | |
| Kanban boards | Not listed | |
Planisware vs Slack cost by team size
| Team size | Planisware | Slack |
|---|---|---|
| 1 user | Contact for pricing | FreeFree |
| 5 users | Contact for pricing | FreeFree |
| 10 users | Contact for pricing | FreeFree |
| 25 users | Contact for pricing | FreeFree |
| 50 users | Contact for pricing | FreeFree |
The plan that fits each team size, billed monthly, before add-ons and usage charges. Each cost opens that tool's pricing calculator for the team size.
Which One Should You Choose?
Why choose Planisware
- Higher Analytics score (8/10 vs 3/10)
- Higher Customization score (9/10 vs 7/10)
- Includes Gantt charts, which Slack lacks
Why choose Slack
- Has a free plan (Planisware does not)
- Higher Integration score (10/10 vs 7/10)
- Higher Ease of Use score (7/10 vs 4/10)
- Better fit for startups (8/10 vs 1/10)
- Better fit for small business (8/10 vs 2/10)
Pros & Cons
Planisware
Pros
- Deep scheduling engine with Gantt, PERT, WBS, earned value and stage-gate support in one product
- Ties budgets, forecasts and actuals to schedules and resources, with links to ERP financials
- Strong security credentials, including ISO 27001, SOC 2 and a CSA STAR Level 2 listing, delivered on a single-tenant cloud
- Customers can start on the packaged Orchestra product and move up to Enterprise as needs grow
- Rated well on Gartner Peer Insights (about 4.5 to 4.6) and recognized by Gartner and Forrester
Cons
- No public pricing, and implementation, training and support add significant first-year cost
- Steep learning curve and admin-heavy configuration, especially for casual users
- Reviewers describe the interface as dated compared with modern SaaS tools
- Heavy customization can hurt performance and make upgrades harder
- Reviews on Software Advice give weak scores for support responsiveness
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.
Not sold on either?
Frequently Asked Questions
Slack scores higher on our AI Software criteria: 7.1/10 against 6.4/10 for Planisware. The largest gap is in Analytics: 8/10 for Planisware and 3/10 for Slack.
Slack has a free plan; Planisware does not list one.
Slack is the better fit for startups: we rate it 8/10 for them, against 1/10 for Planisware.
Planisware has Gantt charts, which Slack lacks.
