Cosy vs TinyFast

Side-by-side comparison to help you choose the right product.

Cosy automates Slack member onboarding and introductions to save community managers time.

Last updated: February 28, 2026

Compress images, videos, and PDFs effortlessly on your Mac with TinyFast for fast, local, and private optimization.

Last updated: February 28, 2026

Visual Comparison

Cosy

Cosy screenshot

TinyFast

TinyFast screenshot

Feature Comparison

Cosy

Automated Onboarding Sequences

Cosy automates the initial welcome and integration process for new community members through fully customizable Direct Message (DM) sequences. Community managers can create up to ten distinct onboarding flows, which can be triggered immediately upon a member joining or on a configurable delay. Messages can be personalized with the member's name, include links and emojis, and are sent from either a human team member's account or the Cosy bot. This ensures every new member receives a consistent, warm welcome at any hour, significantly reducing the manual burden on community leaders and preventing any newcomer from being overlooked.

Automated Member Introductions

To foster connections and serendipitous networking, Cosy automatically introduces opted-in community members to each other via DMs on a regular, customizable schedule. Introductions occur in a three-person DM involving the two members and the Cosy bot, with a template message that can be tailored by the admin. The system intelligently pairs members randomly while avoiding recent matches, similar to platforms like Donut. Administrators control the frequency (every 1-4 weeks) and the specific weekday and time (in UTC) for these introductions, systematically driving engagement and relationship-building on autopilot.

Searchable Member Directory

Cosy provides a fully integrated, searchable member directory that operates entirely within Slack, requiring no external apps or logins. Admins can create custom profile fields (up to ten), including text entry and multiple-choice options. Members can be prompted to fill out their profiles via a one-click notification, and new joiners automatically receive a prompt 24 hours after entering the workspace. Members can then search this directory by keyword or filter for completed profiles using a slash command (/member-directory), making it easy to find relevant peers and expertise without leaving the Slack interface.

Content Highlights & Moderation Tools

This feature empowers community managers to surface valuable content and monitor conversations efficiently. Using slash commands, admins can instantly retrieve the top 10 most engaged posts within a specific channel (/most-engaged-messages) or across all public channels (/most-engaged-messages-all). Additionally, the tool can list public messages that have received no replies (/unreplied-messages), helping to identify discussions that may need a boost. Cosy also includes instant flagging for abusive or spam messages, providing essential moderation capabilities to maintain a healthy and respectful community environment.

About TinyFast

Batch & Drag-Drop Shrink

This feature allows users to compress entire folders of files simultaneously, streamlining the workflow significantly. With just a simple drag-and-drop action, users can quickly get optimized outputs in mere seconds, saving both time and effort.

Blazing-Fast Compression

TinyFast utilizes optimized native engines designed for speed, enabling users to shrink large files in seconds. This feature eliminates the waiting times typically associated with uploading and downloading files in online compression tools, providing users with instant results.

Resize Resolution

For image and video files, TinyFast offers an automatic resizing option that allows users to set preferred resolutions. This capability ensures that the output files are not just smaller, but also tailored to specific size requirements, enhancing usability across various platforms.

100% Local & Private

TinyFast is designed with user privacy as a top priority. All files remain on the user's device, ensuring that there are no uploads to cloud servers. This feature is particularly beneficial for professionals handling sensitive or confidential information, as it guarantees total privacy by design.

Use Cases

Cosy

Scaling Professional Networks and Alumni Groups

For professional networks or alumni associations hosted on Slack, Cosy automates the critical "first touch" and continuous networking that defines their value. Automated onboarding ensures new members feel immediately welcomed and informed. The automated introductions feature continuously fosters new professional connections among members, mimicking the serendipity of in-person events. The searchable member directory allows members to easily find colleagues by skills, industry, or location, turning the Slack community into a powerful, always-active networking hub without constant manual facilitation from organizers.

Managing Customer Success and Support Communities

Companies that host customer communities on Slack can use Cosy to enhance customer experience and product engagement. Automated onboarding DMs can guide new users to key resources, support channels, and best practices. The content highlights feature allows community managers to quickly identify and amplify successful case studies or helpful support answers posted by other customers. Furthermore, the ability to flag spam or abusive messages instantly helps maintain a professional and helpful environment, crucial for customer-facing spaces.

Running Membership-Based Organizations and Clubs

Membership organizations, such as paid clubs or subscription-based communities, require high engagement to justify their value. Cosy helps maintain this by ensuring no member joins unnoticed through its automated welcome sequences. The member directory builds a sense of belonging and helps members connect based on shared interests defined in custom profile fields. Regularly scheduled introductions keep the community dynamic and encourage ongoing dialogue, directly contributing to higher retention rates and perceived member value.

Facilitating Large-Scale Event or Cohort Engagement

For organizations running cohorts, bootcamps, or large virtual events, Cosy streamlines participant integration. Onboarding sequences can deliver crucial logistical information, schedules, and cohort-specific details to all participants simultaneously. As the event progresses, automated introductions can help break the ice among attendees, fostering peer learning and networking. After the event, the member directory serves as a lasting roster, allowing connections made during the event to continue and deepen, thereby extending the lifecycle and impact of the gathering.

TinyFast

Graphic Design Projects

Graphic designers can use TinyFast to compress high-resolution images and vector files before including them in their projects. This ensures that the final artwork is optimized for faster loading times on websites without sacrificing quality.

Video Production

For video editors, TinyFast provides an efficient way to compress large video files for easier sharing and uploading. By quickly resizing and optimizing these files, editors can streamline their workflow and enhance collaboration with team members.

Document Preparation

TinyFast is an excellent tool for professionals who frequently work with large PDF or document files. By compressing these documents, users can ensure that email attachments remain manageable in size and accessible for recipients without losing important content.

Web Development

Web developers can benefit from TinyFast by compressing images and other assets before deploying them to websites. This practice optimizes the performance of web pages, contributing to faster loading times and a better user experience.

Overview

About Cosy

Cosy is a sophisticated, Slack-native application engineered to transform standard Slack workspaces into dynamic, self-sustaining communities. It is specifically designed for community managers, leaders, and organizations that host their communities on Slack and seek to elevate member engagement without proportional increases in manual administrative effort. The core value proposition of Cosy lies in its automation of critical yet repetitive community management tasks, such as member onboarding, facilitating introductions, and content curation, thereby freeing leaders to focus on strategic relationship-building and fostering a collaborative culture. By operating seamlessly within the Slack environment, it eliminates the need for members to navigate external platforms, ensuring a smooth and integrated user experience. Cosy is particularly beneficial for professional networks, alumni groups, customer communities, and any organization that prioritizes creating a supportive, interconnected, and vibrant member ecosystem. Its comprehensive toolset addresses the full lifecycle of community interaction, from a new member's first welcome to ongoing engagement and content discovery, making it an indispensable platform for scaling community efforts efficiently.

About TinyFast

TinyFast is a cutting-edge macOS application designed for users who need to efficiently compress various file types including images, videos, and documents. This innovative tool is tailored for developers, designers, and content creators who value speed, privacy, and ease of use. Unlike online compression tools that require users to upload their files to external servers, TinyFast operates entirely on local machines, ensuring that sensitive data remains secure. The application's intuitive drag-and-drop interface allows users to quickly compress files; simply drag a file into the app to start the process and drag it out to retrieve the optimized version. With support for over 500 file types, TinyFast stands out in the market for its ability to deliver high-quality results in a fraction of the time typically required by traditional methods. By prioritizing user privacy and efficiency, TinyFast provides an essential solution for anyone working with large files on a regular basis.

Frequently Asked Questions

Cosy FAQ

How does the automated onboarding work?

When a new member joins your Slack workspace, Cosy triggers a pre-configured sequence of welcome DMs. You can create up to 10 unique sequences with fully customizable messages that can include the member's name, links, and emojis. These messages can be sent immediately or on a delay (minutes, hours, or even months later) and can appear to come from your account, a team member's account, or the Cosy bot. This ensures every new member is properly welcomed and onboarded without any manual effort, even outside of business hours.

Can members reply to automated messages?

Yes, but it depends on the sender configuration. If the onboarding or introduction messages are sent from a human team member's Slack account, recipients can reply directly as they would in a normal DM conversation. However, if the messages are configured to be sent from the Cosy bot, the bot is currently designed not to respond to replies. This allows for human-like interaction when desired while maintaining clarity when communication is purely automated.

How does the member directory get populated?

Community managers can notify all existing members to create their profiles with a single click, sending a DM prompt via the Cosy bot. Additionally, Cosy automatically sends a profile-editing prompt to every new member 24 hours after they join the Slack workspace. Members simply click 'Edit Profile' in the DM to fill out the custom fields you have set up, which can include text, single-select, or multi-select options. This dual-trigger system ensures high directory participation with minimal administrative effort.

Is there a free plan available?

Yes, Cosy offers a free plan that supports communities with up to 250 members. This allows smaller groups or teams to access core features and evaluate the tool's impact. For communities requiring unlimited members, Cosy provides a 30-day free trial of its paid plans, allowing full access to all features before any commitment is required. This tiered approach makes it accessible for communities of all sizes to begin enhancing their Slack engagement.

TinyFast FAQ

What types of files can I compress with TinyFast?

TinyFast supports a wide range of file types, including images (PNG, JPEG, GIF), videos (MP4, MOV), documents (PDF, DOCX), audio (MP3), and even code files (JS, CSS, JSON). This versatility makes it suitable for various professional needs.

Is TinyFast really free?

TinyFast offers a free plan that allows users to compress up to 5 files per day. This plan provides access to all features, making it a great option for casual users or those who need occasional file compression.

How does TinyFast ensure privacy?

TinyFast operates entirely on the user's local machine, meaning that files never leave the device. There are no uploads to external servers, which significantly reduces the risk of data breaches and ensures that confidential files remain secure.

Can I resize images and videos automatically?

Yes, TinyFast includes a resolution resizing feature that allows users to set preferred sizes for images and videos. This feature is particularly useful for optimizing media for specific platforms or applications where file dimensions matter.

Alternatives

Cosy Alternatives

Cosy is a specialized productivity and community management tool designed for Slack workspaces. It automates key administrative tasks like onboarding new members and facilitating introductions, aiming to enhance engagement and save time for community managers and team leaders. Users may explore alternatives to Cosy for various reasons, including budget constraints, the need for different feature sets, or a requirement for a platform that integrates with tools beyond Slack. Some may seek more advanced analytics, different automation capabilities, or a solution that serves a multi-platform community strategy. When evaluating an alternative, key considerations include the depth of automation for onboarding and engagement, the quality and scope of member directory features, and the flexibility of integration with your existing tech stack. It is also crucial to assess the tool's ability to scale with your community's growth and the overall value relative to its cost.

TinyFast Alternatives

TinyFast is an advanced macOS application that falls into the category of file compression tools. It specializes in efficiently compressing a variety of file types, including images, videos, and documents, directly on users' local machines. This ability to keep operations local ensures that sensitive files remain secure and private, making TinyFast a favored choice among developers, designers, and content creators. Users often seek alternatives to TinyFast for various reasons, including pricing, specific feature needs, or compatibility with different operating systems. When considering alternatives, it's essential to evaluate the features offered, ease of use, speed of compression, and privacy policies. Understanding your unique requirements will help in selecting the most suitable file optimization tool.

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