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Slack vs Teams

Slack vs Teams : Which Tool To Choose In 2025

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Choosing the right communication platform for your business is essential to improving collaboration and efficiency. Among the most widely used tools are Slack and Microsoft Teams, both offering unique features that aim to streamline team communication. However, businesses often find it challenging to decide which one best suits their specific needs. The decision hinges on several factors, such as team size, integration capabilities, and desired features.

This blog will provide an in-depth comparison between Slack and Microsoft Teams, breaking down their key features and differences and how they align with the needs of modern businesses in 2025. Whether your team needs robust integration with Office 365, enhanced collaboration features, or a highly customizable workspace, understanding what each tool offers will help you make an informed choice.

In this guide, we'll highlight the most important aspects to consider when selecting a platform, such as user interface, communication tools, integrations, security, and more. By understanding the strengths and weaknesses of both Slack and Teams, you'll be able to determine which tool is better suited to your company's goals and workflow. Whether you're a startup or a large enterprise, this comparison will provide the clarity you need to choose the platform that enhances your team's productivity and communication.

Understanding Slack And Microsoft Teams

Slack and Microsoft Teams are both powerful communication platforms, but they cater to different business needs. Slack is known for its user-friendly interface and emphasis on seamless collaboration through channels and integrations with third-party apps. It focuses on providing a flexible and customizable workspace, making it a favorite for startups and teams looking for versatility and speed in communication.

Microsoft Teams, on the other hand, is deeply integrated with Microsoft 365, offering a more structured approach to communication within larger organizations. Teams excel in handling video meetings, file sharing, and real-time collaboration, making it ideal for companies already using Microsoft tools. Understanding the core differences between the two platforms will help you decide which is best for your business environment.

Key Differences Between Slack vs Teams

When choosing between Slack and Microsoft Teams, it's essential to understand the key differences that set them apart. Both platforms are designed to improve team collaboration, but they vary in terms of features, integrations, and user experience. These differences can significantly influence how your team communicates and works together, depending on your business needs.

In this section, we'll explore the major factors that differentiate Slack from Microsoft Teams, including participant capacity, call features, and app integrations. Understanding these key features will help you make a more informed decision about which platform best suits your organization's workflow.

Key features Slack Teams
Participant capacity Slack supports up to 15,000 users in a workspace. This is ideal for larger teams but might be limited to very large enterprises. Teams support up to 25,000 participants in a meeting, making it suitable for large organizations with vast communication needs.
Call features Slack offers voice and video calls with up to 15 participants, providing basic collaboration tools for smaller teams. Teams offer robust video conferencing features, including support for webinars and large meetings with up to 1,000 participants.
App integration Slack integrates with over 2,000 third-party apps, allowing for extensive customization and flexibility in workflow management. Teams integrates mainly with Microsoft 365 tools but also supports a variety of external apps, making it best for businesses already using Microsoft products.
Chat history Slack stores chat history indefinitely with a search function, allowing teams to easily reference past conversations. Teams store chat history as long as your organization keeps the data and integrates closely with SharePoint for file storage.
Customization Slack offers high customization, from theme adjustments to custom workflows and app integrations, making it highly adaptable. Teams provide limited customization options but allow for structured team channels and integrations with Office 365 tools for consistency.
Ease of use Slack is known for its simple and intuitive interface, making it easy for teams to get started quickly. Teams have a more complex interface due to its deeper integration with Microsoft tools, which can be overwhelming for new users.
Ease of setup and guest access Slack provides a straightforward setup and allows for easy guest access with restricted permissions. Teams require a bit more configuration but offer more granular control over guest access and permissions, especially for larger organizations.
Security Slack provides robust security features, including two-factor authentication (2FA) and data encryption. Teams benefit from Microsoft's enterprise-level security, including advanced threat protection and compliance with industry standards like HIPAA.
AI features Slack has limited AI-powered features, focusing more on integrations and bots to assist with workflow. Teams incorporate more AI features like automatic transcription during meetings and smart scheduling through Microsoft’s AI capabilities.

Top Slack Features

Top Slack Features

Slack has become one of the most popular communication tools for businesses thanks to its user-friendly interface and powerful features. It allows teams to collaborate effortlessly, whether they're working remotely or in the office. With a wide range of tools, integrations, and customizations, Slack helps streamline workflows and improves overall team productivity. These features make it a top choice for businesses seeking flexible communication solutions.

In this section, we'll explore some of the standout features that make Slack an attractive option for businesses looking to enhance their collaboration and communication. Let's dive into what Slack offers.

Advanced Search Modifiers

Slack's search function allows users to use advanced modifiers to filter results based on specific criteria such as date, file type, or keywords. This feature helps users find important messages, files, or channels quickly, even in a large volume of data. The ability to narrow down search results improves efficiency and ensures no critical information is lost in busy workspaces, helping teams stay organized.

Streamline Sidebar

The sidebar in Slack can be customized to display only the most relevant channels and direct messages. This streamlined approach minimizes clutter and makes it easier for users to navigate their workspace. By removing unnecessary items and organizing the sidebar based on priorities, teams can focus on key conversations and activities, making communication more efficient and improving the overall user experience.

Automated Reminders

Slack's automated reminder feature allows users to set reminders for tasks, meetings, or deadlines directly within the platform. This helps team members stay on track and ensures that important actions or follow-ups are not overlooked. By automating this process, Slack reduces the need for external reminder tools, streamlining task management and improving productivity across teams.

Integration With Third-Party Tools

Slack offers seamless integration with over 2,000 third-party apps, such as Google Drive, Trello, and Asana. These integrations allow businesses to bring all their essential tools into one central platform, reducing the need to switch between different apps. This streamlined approach enhances workflow efficiency and ensures teams can collaborate effectively without losing context or functionality.

Task List Management

Slack provides users with the ability to create and manage task lists within channels or direct messages. This feature helps teams stay organized by tracking tasks and deadlines in a shared space. With task lists easily accessible in Slack, team members can collaborate, update progress, and ensure everyone is aligned without needing to use external project management tools.

Project Management

Slack enables teams to organize and manage projects by creating dedicated channels for each initiative. These channels serve as central hubs where team members can discuss updates, share files, and track progress. By keeping all project-related communication in one place, Slack simplifies project management, fostering better collaboration and ensuring a transparent workflow across teams.

Useful Bots

Slack includes a range of bots that automate tasks such as scheduling meetings, setting reminders, and gathering information. These bots reduce manual work, making communication more efficient. For example, bots can automatically notify team members of important updates or perform routine actions like adding tasks to a to-do list, allowing teams to focus on more strategic activities and improving overall productivity.

Slack Latest Additions

Slack Latest Additions

Slack continues to evolve and introduce new features to enhance collaboration and streamline communication. These updates aim to improve user experience, simplify workflows, and boost productivity within teams. With its constant improvements, Slack ensures that businesses have access to the most modern tools to support seamless communication and collaboration in real-time.

In this section, we'll explore some of the latest additions to Slack that enhance its functionality. These updates provide new ways for teams to collaborate effectively and integrate tools to support remote and hybrid work environments.

Screen Sharing

Slack's screen-sharing feature allows users to share their screens with team members during calls. This update is especially useful for remote teams, as it enhances communication and collaboration during presentations, brainstorming sessions, and troubleshooting. Team members can follow along in real time, making discussions clearer and reducing misunderstandings, thereby improving productivity and problem-solving.

Automated Approval

With automated approval workflows, Slack simplifies processes like requesting and granting approvals. Teams can set up automated approval chains, reducing the need for manual intervention. This feature streamlines approval workflows for documents, tasks, and other business processes, saving time and ensuring consistency in decision-making. It helps teams stay organized while speeding up workflows.

Manage Emoji Preferences

Slack now allows users to manage their emoji preferences, offering greater customization options for teams. Users can choose which emojis appear in their workspace or set up custom emojis for specific teams or projects. This fun yet practical feature helps create a more personalized and engaging workspace, encouraging team interaction and making communication more enjoyable.

Share Conversation History While Adding New Members To The Channel

Slack has introduced the ability to share the conversation history when adding new members to a channel. This feature ensures that new team members are quickly brought up to speed on past discussions, making it easier for them to contribute. It helps maintain continuity and reduces the time spent onboarding new members, improving overall team collaboration.

Top Microsoft Teams Features

Top Microsoft Teams Features

Microsoft Teams has become an essential tool for collaboration in businesses of all sizes, particularly those using the Microsoft 365 ecosystem. Known for its robust communication features, Teams offers seamless integration with Office apps and innovative tools for chat, meetings, and project management. These features help streamline team collaboration, enhance productivity, and provide a unified platform for managing work from any location.

In this section, we will explore some of the top features that make Microsoft Teams a powerful tool for business communication and collaboration. Whether you're working in-person or remotely, these features aim to simplify how teams communicate and collaborate effectively.

Seamless Office 365 Integration

Teams are deeply integrated with Office 365, allowing users to seamlessly work with Word, Excel, PowerPoint, and other Office apps within the platform. This integration enhances productivity by enabling real-time collaboration on documents without needing to switch between apps. Teams keep all project-related files and communication in one place, simplifying workflows and ensuring team members are always on the same page.

Conversation Threads

Microsoft Teams allows users to keep discussions organized through threaded conversations. This feature makes it easier to follow specific topics or replies within a conversation. By avoiding a continuous, scrolling chat feed, conversation threads keep discussions focused and organized, ensuring that important information doesn't get lost and that everyone in the team can contribute efficiently to ongoing discussions.

Slash Commands

Slash commands in Teams provide a quick way to execute actions without navigating through menus. By typing a simple command (e.g., /files to search for files), users can instantly access key features, improving efficiency. This time-saving feature helps users interact with the platform more effectively, ensuring they can complete tasks or find information without unnecessary clicks.

Grid View

Teams offer a grid view during video calls, which displays all participants on one screen. This feature is ideal for meetings with multiple attendees, as it allows everyone to be visible, making the conversation more interactive and engaging. Grid view helps foster a sense of connection, even during large meetings, ensuring no participant feels overlooked.

Advanced Cyber Security

Microsoft Teams provides advanced security features to protect data and maintain compliance with industry standards. Teams use encryption for all data in transit and at rest, along with multi-factor authentication (MFA) to enhance account security. These robust security measures make Teams a reliable platform for businesses handling sensitive information, offering peace of mind when using the app for communication and collaboration.

Teams Latest Additions

Teams Latest Additions

Microsoft Teams consistently updates its features to meet the evolving needs of modern workplaces, particularly as remote and hybrid work environments become more common. These new additions not only improve the overall user experience but also enhance collaboration and communication across teams. Teams' ongoing updates demonstrate Microsoft's commitment to providing tools that adapt to the challenges of today's business world.

In this section, we will explore the latest features in Microsoft Teams, which further elevate its capabilities. From enhanced meeting tools to new ways of interacting during virtual workspaces, these updates ensure that Teams remains a powerful and efficient platform for businesses.

Enhanced Webinar Management Experience With Customized Options

Microsoft Teams now offers improved webinar features, giving users more control over their virtual events. Organizers can customize registration forms, create branded event pages, and manage attendee settings. These improvements help businesses host professional and organized webinars with ease, allowing for a more seamless experience for both hosts and participants, ensuring a high-quality virtual event.

Federated Group Calling

Federated group calling allows Teams users to connect with people outside their organization for group calls. This feature enhances cross-company collaboration by enabling calls with external partners or clients without needing to switch to another platform. It simplifies communication with broader networks, improving collaboration across organizational boundaries and enhancing workflow in multi-company projects.

Start Whiteboard From A Teams Meeting

Teams have introduced the ability to launch a whiteboard directly during meetings. This feature makes brainstorming sessions and collaborative work easier by providing a shared space for visual interaction. Team members can write, draw, and annotate on the whiteboard in real-time, facilitating more effective discussions, problem-solving, and decision-making, which is especially valuable during remote or hybrid meetings.

View The Full Chat Conversation Thread

With this latest update, Microsoft Teams allows users to view the full conversation thread in a chat, even after it has been scrolled past. This feature ensures that team members can easily catch up on any missed messages and stay informed. It helps maintain continuity in conversations, making it easier to follow discussions and ensuring that no important information is overlooked during ongoing chats.

Slack vs Teams : Feature Comparison

Slack vs Teams : Feature Comparison

When comparing Slack and Microsoft Teams, it's important to consider the key features that each platform offers. Both tools are designed to enhance team collaboration, but they approach it in different ways. Teams excel with its Office 365 integration, making it a great option for businesses already using Microsoft's suite of products. On the other hand, Slack focuses on user experience, offering a more customizable and flexible workspace for teams.

In this section, we'll break down the key feature comparisons between Slack and Microsoft Teams. Each platform has strengths that make it ideal for certain business needs, and understanding these differences will help you determine which tool is best suited for your organization.

User Interface

Slack is known for its clean and intuitive user interface, making it easy to navigate and organize channels. It features a streamlined sidebar, simple chat layouts, and visually appealing options. The interface is designed to be user-friendly, which makes it easier for new users to adopt and engage with the platform, giving Slack an edge over Teams in this area.

Navigation

Both Slack and Teams offer a straightforward navigation experience, but their layouts differ. Slack's sidebar is customizable, allowing users to easily switch between channels, direct messages, and apps. Teams, however, integrates tightly with the Office 365 suite, making it easy to access files and meetings within the platform. While both tools are efficient, the choice depends on personal preference and business requirements.

Communication

Microsoft Teams offers a more robust communication experience, particularly when it comes to video conferencing and voice calls. With its integration of Office 365, Teams allows for seamless communication during meetings, live events, and team chats. The video calling features are more comprehensive, and they support larger group calls, making it a superior choice for organizations that prioritize real-time communication.

In-App Help

Slack offers superior in-app help, with access to a variety of support options, tutorials, and a detailed help center. Its extensive library of resources ensures that users can find answers to their questions or resolve issues quickly. Teams, while offering in-app help, tend to have a steeper learning curve, which can sometimes make it harder for users to get immediate assistance.

Notifications

Slack provides highly customizable notification settings, allowing users to manage how and when they receive alerts. Whether it's for new messages, mentions, or keywords, users can set preferences to avoid distractions. Teams also offer notification management but lack the same level of granularity and flexibility that Slack provides, giving Slack a noticeable advantage in this area.

Search

Slack's search function is one of its standout features, allowing users to find messages, files, and discussions with incredible ease. It includes advanced search modifiers that help users filter results by channel, date, or type of content. This makes it easy to retrieve important information quickly, something that Teams' search feature struggles to match in terms of depth and speed.

Security And Privacy

Microsoft Teams takes the lead when it comes to security and privacy. As part of the Microsoft ecosystem, it benefits from enterprise-level security features, including data encryption, multi-factor authentication, and compliance with regulatory standards. For businesses handling sensitive data, Teams offers a higher level of security compared to Slack, making it the preferred choice for larger organizations or those with strict privacy requirements.

Integration With Other Tools

Slack excels at integrating with a wide variety of third-party apps and services, including tools like Google Drive, Trello, and Asana. Its flexibility in supporting various integrations makes it highly adaptable for different workflows. While Teams also integrates with Microsoft apps and some third-party tools, Slack's extensive app directory provides greater variety and more options for customization, making it the better choice for teams that rely on a variety of external tools.

Conclusion

So, both Slack and Microsoft Teams have their unique strengths, catering to different business needs. Slack excels in user experience, customization, and integration with third-party tools, while Teams shines with its deep integration into the Office 365 ecosystem and robust security features. Ultimately, your choice depends on the specific needs of your team. For an added productivity boost, Copilot.Live can enhance both platforms with AI-driven assistance, streamlining workflows and boosting collaboration.

FAQs

Slack is often more suitable for smaller businesses due to its user-friendly interface and flexibility with third-party integrations.

While Slack and Teams are separate platforms, third-party apps allow limited integration between them for improved collaboration.

Yes, Teams supports third-party apps, but its integration is primarily optimized for Microsoft services.

Teams offer superior security features, particularly for businesses with strict compliance and privacy requirements.

Teams have more advanced webinar features, while Slack integrates with third-party apps for webinar hosting.

Copilot.Live integrates with both platforms to enhance communication, automate tasks, and offer AI-driven insights, improving productivity and collaboration.

Full documentation in Finsweet's Attributes docs.

Slack is often more suitable for smaller businesses due to its user-friendly interface and flexibility with third-party integrations.

While Slack and Teams are separate platforms, third-party apps allow limited integration between them for improved collaboration.

Yes, Teams supports third-party apps, but its integration is primarily optimized for Microsoft services.

Teams offer superior security features, particularly for businesses with strict compliance and privacy requirements.

Teams have more advanced webinar features, while Slack integrates with third-party apps for webinar hosting.

Copilot.Live integrates with both platforms to enhance communication, automate tasks, and offer AI-driven insights, improving productivity and collaboration.

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