Best Vetted Alternatives to Slack

Microsoft Teams

Alternative to Slack

SecurityB

8.7/10

Rep Score: 920 Saves

SubscriptionProfessionalCloud-Native / SaaSProprietary

Plays nice with

GitHubJiraSlackGoogleAzureOkta

Best forMicrosoft 365–standardized enterprises

Included with some Microsoft 365 business and enterprise plans; standalone paid plans available. Advanced compliance, calling, and webinar features may require higher-tier licenses.

Summary

Enterprise collaboration and chat platform tightly integrated with Microsoft 365, offering persistent channels, meetings, calling, file sharing, and workflow automation for organizations already standardized on Microsoft tools.

Why Switch

Often chosen over Slack when teams need native Microsoft 365 integration, enterprise compliance controls, and bundled E5 licensing economics.

Pros

Cons

0 builders switched

Go to Microsoft Teams

Microsoft Teams

Alternative to Slack

SecurityB

8.7/10

Rep Score: 920 Saves

SubscriptionProfessionalCloud-Native / SaaSProprietary

Plays nice with

GitHubJiraSlackGoogleAzureOkta

Best for

Microsoft 365–standardized enterprises

Cost

Included with some Microsoft 365 business and enterprise plans; standalone paid plans available. Advanced compliance, calling, and webinar features may require higher-tier licenses.

Summary

Enterprise collaboration and chat platform tightly integrated with Microsoft 365, offering persistent channels, meetings, calling, file sharing, and workflow automation for organizations already standardized on Microsoft tools.

Why Switch

Often chosen over Slack when teams need native Microsoft 365 integration, enterprise compliance controls, and bundled E5 licensing economics.

Pros

Cons

0 builders switched

Go to Microsoft Teams

Mattermost

Alternative to Slack

SecurityB

8.4/10

Rep Score: 840 Saves

On-Premises / HybridOpen-Source (Apache 2.0)

Plays nice with

GitHubGitLabJiraSlackOkta

Best forSelf-hosting and regulated environments

Open-source self-hosted edition available; commercial cloud and enterprise plans add advanced security, compliance, and support.

Summary

Open-source team messaging and collaboration platform designed for secure, self-hosted, and regulated environments, with channels, playbooks, integrations, and strong control over data residency.

Why Switch

Often chosen over Slack when security teams require data residency, air-gapped deployment, or full control over messaging infrastructure.

Pros

🟢Self-hosting and data control for regulated deployments
🟢Good fit for security-conscious and technical teams

Cons

🔴Requires more operational effort if self-hosted
🔴Smaller ecosystem and mindshare than Slack

0 builders switched

Go to Mattermost

Mattermost

Alternative to Slack

SecurityB

8.4/10

Rep Score: 840 Saves

On-Premises / HybridOpen-Source (Apache 2.0)

Plays nice with

GitHubGitLabJiraSlackOkta

Best for

Self-hosting and regulated environments

Cost

Open-source self-hosted edition available; commercial cloud and enterprise plans add advanced security, compliance, and support.

Summary

Open-source team messaging and collaboration platform designed for secure, self-hosted, and regulated environments, with channels, playbooks, integrations, and strong control over data residency.

Why Switch

Often chosen over Slack when security teams require data residency, air-gapped deployment, or full control over messaging infrastructure.

Pros

🟢Self-hosting and data control for regulated deployments
🟢Good fit for security-conscious and technical teams
🟢Extensible integrations and automation options

Cons

🔴Requires more operational effort if self-hosted
🔴Smaller ecosystem and mindshare than Slack
🔴User experience can be less polished for casual adoption

0 builders switched

Go to Mattermost

GC

Google Chat

Alternative to Slack

SecurityB

7.4/10

Rep Score: 780 Saves

SubscriptionEnterpriseCloud-Native / SaaSProprietary

Plays nice with

Google

Best forGoogle Workspace-centric organizations

Included with Google Workspace plans; pricing depends on Workspace edition and admin/security requirements.

Summary

Business messaging and collaboration tool integrated with Google Workspace, offering spaces, direct messaging, and Meet integration for organizations already using Google apps.

Why Switch

Teams switch from Slack to Google Chat when they already rely on Google Workspace and want messaging that is bundled into their existing collaboration stack.

Pros

🟢Tight integration with Gmail, Drive, Docs, and Meet
🟢Simple deployment for Google Workspace customers

Cons

🔴Smaller app ecosystem than Slack or Teams
🔴Less feature-rich for complex enterprise workflows

0 builders switched

Go to Google Chat

GC

Google Chat

Alternative to Slack

SecurityB

7.4/10

Rep Score: 780 Saves

SubscriptionEnterpriseCloud-Native / SaaSProprietary

Plays nice with

Google

Best for

Google Workspace-centric organizations

Cost

Included with Google Workspace plans; pricing depends on Workspace edition and admin/security requirements.

Summary

Business messaging and collaboration tool integrated with Google Workspace, offering spaces, direct messaging, and Meet integration for organizations already using Google apps.

Why Switch

Teams switch from Slack to Google Chat when they already rely on Google Workspace and want messaging that is bundled into their existing collaboration stack.

Pros

🟢Tight integration with Gmail, Drive, Docs, and Meet
🟢Simple deployment for Google Workspace customers
🟢Good fit for organizations standardized on Google cloud tools

Cons

🔴Smaller app ecosystem than Slack or Teams
🔴Less feature-rich for complex enterprise workflows
🔴Adoption can be limited outside Google-centric environments

0 builders switched

Go to Google Chat

Rocket.Chat

Alternative to Slack

SecurityB

8/10

Rep Score: 780 Saves

HybridOpen-Source (Community) with Proprietary Enterprise options

Plays nice with

GitHubGitLabJiraSlackOkta

Best forRegulated teams and self-hosting organizations

Community/open-source edition available; paid cloud and enterprise offerings provide additional features, support, and governance controls.

Summary

Open-source communications platform for team chat, customer messaging, and internal collaboration, with self-hosting options and customization for organizations needing control over infrastructure and data.

Why Switch

Teams switch from Slack to Rocket.Chat when they need more control over data, infrastructure, and customization than Slack typically offers.

Pros

🟢Flexible self-hosted deployment options
🟢Supports both internal chat and customer-facing messaging use cases

Cons

🔴Administration and upgrades can be more involved than SaaS-only tools
🔴Smaller default user base and integration catalog than Slack

0 builders switched

Go to Rocket.Chat

Rocket.Chat

Alternative to Slack

SecurityB

8/10

Rep Score: 780 Saves

HybridOpen-Source (Community) with Proprietary Enterprise options

Plays nice with

GitHubGitLabJiraSlackOkta

Best for

Regulated teams and self-hosting organizations

Cost

Community/open-source edition available; paid cloud and enterprise offerings provide additional features, support, and governance controls.

Summary

Open-source communications platform for team chat, customer messaging, and internal collaboration, with self-hosting options and customization for organizations needing control over infrastructure and data.

Why Switch

Teams switch from Slack to Rocket.Chat when they need more control over data, infrastructure, and customization than Slack typically offers.

Pros

🟢Flexible self-hosted deployment options
🟢Supports both internal chat and customer-facing messaging use cases
🟢Highly customizable and extensible

Cons

🔴Administration and upgrades can be more involved than SaaS-only tools
🔴Smaller default user base and integration catalog than Slack
🔴Advanced capabilities may require paid tiers

0 builders switched

Go to Rocket.Chat

Discord

Alternative to Slack

SecurityD

4.2/10

Rep Score: 670 Saves

SubscriptionProfessionalCloud-Native / SaaSFreemium

Plays nice with

GitHubGitLabJiraSlackZapier

Best forStartups, communities, and informal distributed teams

Free tier available; paid Nitro and server features are primarily consumer/community oriented, with limited formal enterprise controls compared with Slack.

Summary

Real-time messaging and voice platform originally popular with communities and gaming, now used by startups and distributed teams for lightweight chat, voice channels, and informal collaboration.

Why Switch

Teams switch from Slack to Discord when they want a lighter-weight, low-friction chat and voice experience with a generous free tier, even if it means giving up some of Slack's business governance features.

Pros

Cons

0 builders switched

Go to Discord

Discord

Alternative to Slack

SecurityD

4.2/10

Rep Score: 670 Saves

SubscriptionProfessionalCloud-Native / SaaSFreemium

Plays nice with

GitHubGitLabJiraSlackZapier

Best for

Startups, communities, and informal distributed teams

Cost

Free tier available; paid Nitro and server features are primarily consumer/community oriented, with limited formal enterprise controls compared with Slack.

Summary

Real-time messaging and voice platform originally popular with communities and gaming, now used by startups and distributed teams for lightweight chat, voice channels, and informal collaboration.

Why Switch

Teams switch from Slack to Discord when they want a lighter-weight, low-friction chat and voice experience with a generous free tier, even if it means giving up some of Slack's business governance features.

Pros

Cons

0 builders switched

Go to Discord