Slack

Name: Slack
Brand: Salesforce
Rating: 4.6 (78994 reviews)

Leader

We're the #1 AI CRM—where humans with agents drive customer success together.

Est 1999|Valuation $204.6B|Raised $43.2B|504 Ref Customers

LinkedIn 6.7M|Website|Web traffic 78.5M|FTEs 83,334|HQ San Francisco, California, US

MarketsCustomer Service CRM (CSM)Productivity & Collaboration Suite

Platform CoversKnowledge Management AI Assistant

01Competitive Landscape

| Aspect | Slack | Microsoft Teams | Mattermost | |--------|-------|-----------------|------------| | Starting Price | Free; published per-seat pricing available from the vendor for Pro and Business tiers | Varies by Microsoft licensing; Teams Premium add-on available at published per-user pricing requiring eligible licensing | Contact sales for paid self-hosted tiers; positioning emphasizes self-hosted/enterprise offerings (sales-led pricing) | | Primary Use Cases | High-velocity channel-based collaboration with broad integrations; cross-company channels (Slack Connect) | Organizations standardized on Microsoft 365 needing suite consolidation (meetings, files, calling) | Regulated / sovereign / air-gapped deployments and mission-critical environments needing self-hosted control | | Key Strength | Mature channel model, broad integrations, searchable conversation history patterns | Suite consolidation, Office co-authoring, telephony/meetings integration | Deployment control (self-host, government cloud, air-gapped), tailored security posture | | Key Weakness | Potentially higher cost at scale; notification management and governance overhead; not a single-vendor suite for meetings/files/telephony | Feature and UX trade-offs; cost-effectiveness often depends on existing Microsoft licensing | Less mainstream for general business chat; may require more IT operations effort to run | - Narrative analysis - Microsoft Teams - Offers a competitive advantage when a company already procures Microsoft 365 and prefers to reduce the number of vendors. - Community commentary frequently highlights cost advantages when Teams is included with enterprise Microsoft agreements; such comparisons are often anecdotal and should be validated with total-cost calculations. - Google Chat - Often sufficient for organizations standardized on Google Workspace due to integrated identity and admin flows. - Zoom Team Chat - Positioned as integrated with Zoom meetings in Zoom Workplace plans; vendor materials emphasize meeting-centric continuity and bundled economics. - Vendor-authored positioning should be validated against buyer requirements. - Mattermost - Differentiates on sovereign/self-hosted deployment models and mission-critical operations, with detailed deployment and security information for high-assurance use cases. - Market share and adoption trends - Not quantified with independent analyst market-share reports in this research run. Indicators of broad adoption include review volumes on major product review sites.

01Competitive Landscape

Aspect	Slack	Microsoft Teams	Mattermost
Starting Price	Free; published per-seat pricing available from the vendor for Pro and Business tiers	Varies by Microsoft licensing; Teams Premium add-on available at published per-user pricing requiring eligible licensing	Contact sales for paid self-hosted tiers; positioning emphasizes self-hosted/enterprise offerings (sales-led pricing)
Primary Use Cases	High-velocity channel-based collaboration with broad integrations; cross-company channels (Slack Connect)	Organizations standardized on Microsoft 365 needing suite consolidation (meetings, files, calling)	Regulated / sovereign / air-gapped deployments and mission-critical environments needing self-hosted control
Key Strength	Mature channel model, broad integrations, searchable conversation history patterns	Suite consolidation, Office co-authoring, telephony/meetings integration	Deployment control (self-host, government cloud, air-gapped), tailored security posture
Key Weakness	Potentially higher cost at scale; notification management and governance overhead; not a single-vendor suite for meetings/files/telephony	Feature and UX trade-offs; cost-effectiveness often depends on existing Microsoft licensing	Less mainstream for general business chat; may require more IT operations effort to run

Narrative analysis
- Microsoft Teams
  - Offers a competitive advantage when a company already procures Microsoft 365 and prefers to reduce the number of vendors.
  - Community commentary frequently highlights cost advantages when Teams is included with enterprise Microsoft agreements; such comparisons are often anecdotal and should be validated with total-cost calculations.
- Google Chat
  - Often sufficient for organizations standardized on Google Workspace due to integrated identity and admin flows.
- Zoom Team Chat
  - Positioned as integrated with Zoom meetings in Zoom Workplace plans; vendor materials emphasize meeting-centric continuity and bundled economics.
  - Vendor-authored positioning should be validated against buyer requirements.
- Mattermost
  - Differentiates on sovereign/self-hosted deployment models and mission-critical operations, with detailed deployment and security information for high-assurance use cases.
Market share and adoption trends
- Not quantified with independent analyst market-share reports in this research run. Indicators of broad adoption include review volumes on major product review sites.

Aspect

Slack

Microsoft Teams

Mattermost

Starting Price

Free; published per-seat pricing available from the vendor for Pro and Business tiers

Varies by Microsoft licensing; Teams Premium add-on available at published per-user pricing requiring eligible licensing

Contact sales for paid self-hosted tiers; positioning emphasizes self-hosted/enterprise offerings (sales-led pricing)

Primary Use Cases

High-velocity channel-based collaboration with broad integrations; cross-company channels (Slack Connect)

Organizations standardized on Microsoft 365 needing suite consolidation (meetings, files, calling)

Regulated / sovereign / air-gapped deployments and mission-critical environments needing self-hosted control

Key Strength

Mature channel model, broad integrations, searchable conversation history patterns

Suite consolidation, Office co-authoring, telephony/meetings integration

Deployment control (self-host, government cloud, air-gapped), tailored security posture

Key Weakness

Potentially higher cost at scale; notification management and governance overhead; not a single-vendor suite for meetings/files/telephony

Feature and UX trade-offs; cost-effectiveness often depends on existing Microsoft licensing

Less mainstream for general business chat; may require more IT operations effort to run