Klient PSA vs Mattermost: Complete Comparison (2026)
An in-depth comparison of Klient PSA and Mattermost to help you choose the right tool for your business.
Last updated: November 2026
Klient PSA
6.8/10
Klient PSA is a professional services automation app built natively on Salesforce. It covers projects, resources, time, billing and revenue recognition for services firms.
Mattermost
6.7/10
Self-hostable, open-source team messaging and workflow platform with playbooks, kanban boards and AI agents, built for security-conscious and regulated organizations.
Feature-by-Feature Comparison
| Feature | | |
|---|---|---|
| Scores | ||
| Overall Rating | 6.8/10 | 6.7/10 |
| Integration | 7/10 | 7/10 |
| Analytics | 7/10 | 3/10 |
| Customization | 8/10 | 8/10 |
| Ease of Use | 6/10 | 6/10 |
| Support | 7/10 | 6/10 |
| Cost | 5/10 | 5/10 |
| Scalability | 7/10 | 9/10 |
| Security | 8/10 | 10/10 |
| Pricing | ||
| Free plan | No | Yes |
| Cheapest paid plan | $39/user/mo Klient PSA | $10/user/mo Professional |
| Estimated cost for 10 users | $390/mo Klient PSA | Free Team Edition |
| Features | ||
| Scheduling | Not listed | |
| Client collaboration | ||
| App integrations | ||
| Task lists | ||
| Gantt charts | Not listed | |
| Task management | Not listed | |
| Time tracking | Not listed | |
| Workflow automation | ||
| Dashboards | Not listed | |
| Collaboration tools | ||
| Reporting | Not listed | |
| Team messaging | Not listed | |
| File sharing | Not listed | |
| Kanban boards | Not listed | |
Klient PSA vs Mattermost cost by team size
Mattermost costs less at every team size we checked.
| Team size | Klient PSA | Mattermost |
|---|---|---|
| 1 user | $39/moKlient PSA | FreeTeam Edition |
| 5 users | $195/moKlient PSA | FreeTeam Edition |
| 10 users | $390/moKlient PSA | FreeTeam Edition |
| 25 users | $975/moKlient PSA | FreeTeam Edition |
| 50 users | $1,950/moKlient PSA | FreeTeam Edition |
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 Klient PSA
- Higher Analytics score (7/10 vs 3/10)
- Higher Support score (7/10 vs 6/10)
Why choose Mattermost
- Has a free plan (Klient PSA does not)
- Lower estimated cost for 10 users: Free vs $390/mo
- Higher Scalability score (9/10 vs 7/10)
- Higher Security score (10/10 vs 8/10)
- Better fit for enterprise (9/10 vs 6/10)
Pros & Cons
Klient PSA
Pros
- It runs natively in Salesforce, so project, resource and billing data sit next to CRM opportunities and use the existing Salesforce permissions.
- Reviewers say time tracking, project profitability and forecasting work well together in one system.
- The base edition includes the Salesforce Platform license and connectors for QuickBooks, Xero and AccountingSeed.
- Klient lists SOC 2 Type 2 compliance, and its agents inherit Salesforce's Einstein Trust Layer.
- Enterprise includes a branded client portal with approvals and five community users per internal user.
Cons
- It only makes sense for firms already on Salesforce.
- Reviewers mention a steep learning curve and thin documentation.
- Some users call the project management weaker than in dedicated PM tools, and one finds revenue recognition weaker than competitors'.
- Jira Sync, the Sage Intacct connector, AI agents and guided onboarding are all extra costs, and guided onboarding can reach $18,000.
- Reviewers say there is no customizable PDF generation for proposals.
Mattermost
Pros
- Can be fully self-hosted or air-gapped, which suits defense, government and regulated industries
- Enterprise tiers include strong compliance tooling: FIPS 140-3 builds, legal hold, compliance export and granular RBAC
- Playbooks give incident and DevOps teams repeatable checklists with automated triggers inside chat
- Built-in Jira, GitHub and GitLab integrations, plus an open API for custom bots
- Open-source core under MIT and AGPL licenses avoids full vendor lock-in
Cons
- The Boards kanban plugin is in maintenance mode and has been removed from the in-product marketplace
- Since v11 the free Entry plan shows only the last 10,000 messages and Team Edition is capped at 250 users, which drew community criticism
- The vendor publishes no prices, licenses are annual prepaid only, and every server needs its own license
- No Gantt charts, time tracking or project reporting, so it cannot replace a dedicated project management tool
- Self-hosting requires admin time and server upkeep
Not sold on either?
Frequently Asked Questions
Klient PSA scores higher on our AI Software criteria: 6.8/10 against 6.7/10 for Mattermost. The largest gap is in Analytics: 7/10 for Klient PSA and 3/10 for Mattermost.
Mattermost costs less for 10 users: free on its Team Edition plan, against about $390/mo on its Klient PSA plan for Klient PSA, billed monthly.
Mattermost has a free plan; Klient PSA does not list one.
Mattermost is the better fit for enterprise: we rate it 9/10 for them, against 6/10 for Klient PSA.
