Cosy vs Perkoon
Side-by-side comparison to help you choose the right tool.
Effortlessly onboard and connect your Slack community with automated DMs, saving you hours each week.
Last updated: February 28, 2026
Perkoon offers free unlimited P2P file transfers with no signup and no data scanning.
Last updated: March 4, 2026
Visual Comparison
Cosy

Perkoon

Feature Comparison
Cosy
Automate Onboarding
Cosy allows you to create and automate up to 10 distinct onboarding welcome DM sequences. When a new member joins your Slack workspace, they receive tailored onboarding messages either immediately or after a specified delay. This feature is customizable, enabling you to include member names, links, and emojis, making each welcome feel personal. You can rest assured that every new member is greeted, even during odd hours, freeing up your time and ensuring no one is left out.
Connect Your Members
Enhance community engagement by automatically introducing members to each other via DMs. You can customize the frequency and timing of these introductions, making it easy for members to connect and interact. Opted-in members are randomly selected for introductions, promoting serendipitous conversations while avoiding repeated matches. This feature ensures that your community remains vibrant and connected, even when you are not actively managing it.
Member Directory
Create a simple and searchable member directory directly within Slack. Members can easily fill out their profiles with customized fields that you set up, allowing others to search for keywords and filter profiles. This feature encourages members to learn more about each other and facilitates meaningful connections. Members can access their profiles through the Cosy app or by using a quick slash command, making it effortless to engage with one another.
Content Highlights
Cosy instantly surfaces the top 10 most engaging posts in your community, along with a list of public messages that have gone unanswered. By using simple slash commands, community managers can quickly view the most engaging content or identify posts that require attention. This feature keeps the community active and ensures that important discussions are not overlooked, fostering ongoing engagement.
Perkoon
Unlimited Free P2P Transfers
This is the game-changer. Perkoon's core technology uses WebRTC to establish a direct, encrypted peer-to-peer connection between two browsers. Files stream from sender to recipient without ever passing through Perkoon's servers. This means there are absolutely no file size limits, no mandatory accounts, and complete privacy. The service is free because the infrastructure cost is virtually zero. It's file transfer in its purest, most efficient form, available to anyone with a modern browser.
Honest Encrypted Cloud Storage
For when your recipient is offline, Perkoon provides a straightforward cloud holding service. Files are encrypted on their servers before storage. This is the paid part of the service, and Perkoon is transparent about it: you pay for the real cost of server space and bandwidth. No hidden fees, no freemium tricks. It's an honest solution for asynchronous transfers, clearly separated from the free, real-time P2P system.
Native AI & Automation API
Perkoon is built for the future. Instead of forcing AI agents to clumsily scrape a website, Perkoon exposes a direct JavaScript API (window.__perkoon). This allows automation scripts, bots, and AI assistants to programmatically initiate and manage file transfers directly within the browser environment. It's a foundational feature that treats automation as a first-class citizen, not an afterthought.
Privacy-First Architecture
Your data is not the product. P2P transfers are inherently private as data is never intercepted. For cloud storage, files are encrypted. Perkoon does not scan, analyze, or sell your data. The entire service is built on the principle of minimal data handling, with clear explanations of what happens to your files in each transfer mode, putting user privacy and control front and center.
Use Cases
Cosy
Enhance New Member Experience
With Cosy, newly joined members receive immediate, personalized onboarding messages. This ensures they feel welcomed and informed about community norms and resources. The automated nature of this feature means community managers can focus on other priorities while new members receive the attention they need to integrate smoothly.
Facilitate Networking Opportunities
Cosy’s automatic member introductions create networking opportunities within the community. By connecting members based on their interests or roles, you foster collaboration and encourage meaningful conversations. This leads to stronger relationships and a more cohesive community.
Simplify Member Management
Community managers can utilize Cosy’s member directory to simplify the process of managing member information. With customizable fields and easy search functionality, members can find others with shared interests or skills, enhancing the overall community experience without extensive manual effort.
Keep Content Engaging
By leveraging Cosy’s content highlights feature, community managers can ensure that the most engaging discussions are brought to the forefront. This encourages participation and helps keep conversations lively, allowing members to stay informed and involved without missing out on important interactions.
Perkoon
Sending Massive Creative Files
Video editors, 3D artists, and photographers can finally breathe easy. Need to send a raw 80GB project file to a client or collaborator? With Perkoon's P2P transfer, you can do it instantly and for free. No more splitting archives, battling upload limits, or paying for expensive "pro" tiers just to do your job. It's unlimited transfer for unlimited creativity.
Secure Document Exchange for Professionals
Lawyers, journalists, and consultants handling sensitive documents require confidentiality. Perkoon's direct P2P channel ensures documents move from point A to point B without being stored on or scanned by an intermediary server. For offline delivery, the encrypted cloud storage provides a secure holding pen, all without the data-harvesting practices of mainstream cloud services.
Automated Workflow & AI Agent Integration
Developers and power users can integrate Perkoon directly into their automated pipelines. An AI agent that generates weekly reports can use the native API to send them directly to a team. Backup scripts can offload large logs via the CLI tool. Perkoon acts as a programmable transfer layer, seamlessly connecting automated processes with human recipients.
Referral-Powered Storage Growth
Users who need more cloud storage can earn it organically through Perkoon's transparent affiliate program. By sharing a unique referral link, you and your contacts both receive bonus storage, with potential for chain rewards. It's a community-driven model that rewards active users instead of just charging them more, aligning platform growth with user benefit.
Overview
About Cosy
Cosy is an innovative tool designed specifically for Slack, revolutionizing the way communities engage and interact. With its suite of automation and smart features, Cosy streamlines the onboarding process, fosters connections among members, and enhances overall community dynamics. It enables community managers to automate welcome messages and personal introductions, ensuring that every new member feels valued and connected from the moment they join. Cosy features a user-friendly member directory, allowing members to easily find and connect with each other without leaving Slack. Additionally, it highlights the most engaging content within the community, maintaining a lively atmosphere. By detecting spam and abusive language, Cosy creates a safe environment for all users. Whether you are a community leader, a team manager, or a facilitator, Cosy is tailored to meet your needs, saving you time and enhancing engagement in your Slack workspace. With Cosy, transform your Slack into a thriving community that fosters meaningful interactions and relationships.
About Perkoon
Forget everything you know about file transfer. In an era of surveillance capitalism, artificial limits, and mandatory sign-ups, Perkoon is the radical return to sanity. This isn't just another WeTransfer clone; it's a foundational protocol built for the next generation of users and machines. Perkoon cuts through the corporate nonsense with a brutally honest, two-pronged approach. Its flagship service is unlimited, free, peer-to-peer (P2P) transfer that beams files directly between browsers. No accounts, no size caps, and because the data never touches a central server, it's private and costs Perkoon nothing—so it's free for you, forever. For sending to offline recipients, Perkoon offers transparently priced, encrypted cloud storage. But the real alert? Perkoon is natively designed for the age of AI, with built-in APIs so your agents can interact directly, no screen-scraping required. It's the privacy-focused, automation-ready file transfer solution for real people, developers, and the intelligent agents that work for them.
Frequently Asked Questions
Cosy FAQ
How does Cosy automate onboarding?
Cosy automates onboarding by allowing you to create up to 10 distinct welcome DM sequences that are sent automatically when a new member joins your Slack workspace. You can customize the messages and set timing preferences for delivery.
Can I customize member introductions?
Yes, Cosy enables you to customize the frequency and timing of member introductions. You can set intervals for how often introductions occur, ensuring that members are connected regularly in a way that suits your community’s needs.
What features are included in the member directory?
The member directory allows members to create profiles with customizable fields, making it easy to find others based on keywords and specific criteria. Members can access their profiles and search the directory directly within Slack.
How does Cosy handle spam and abusive language?
Cosy is equipped with features that detect spam and abusive language, ensuring a safe and enjoyable environment for all community members. This proactive approach helps maintain a positive atmosphere and encourages healthy interactions.
Perkoon FAQ
Is the free P2P transfer really unlimited and free forever?
Yes. The P2P technology streams data directly between browsers (like a video call for files). Since Perkoon's servers are not involved in the data transfer, they incur no bandwidth or storage costs. Therefore, they can offer this specific service as unlimited and free indefinitely. It's free as in beer, because it costs them nothing to provide.
What happens if the person I'm sending to is offline?
If the recipient is not online to accept the direct P2P connection, Perkoon offers encrypted cloud storage as a fallback. This is a paid feature because it involves Perkoon's servers storing your file until the recipient is ready to download it. You can initiate a cloud transfer instead, or the recipient can be notified to come online for a free P2P transfer.
How does Perkoon work with AI agents and automation?
Perkoon is built with automation in mind. It provides a native JavaScript API (window.__perkoon) accessible in the browser. This allows AI agents and scripts to control the transfer process programmatically without needing to simulate human clicks or scrape the website's HTML, making it a reliable and official integration point for machines.
Which web browsers are supported?
For the full, unlimited P2P experience, Chromium-based browsers like Chrome, Edge, and Brave are recommended. Firefox and Safari have inherent browser restrictions that can limit certain aspects of P2P functionality or file sizes. It's always best to use a modern, updated browser for optimal performance.
Alternatives
Cosy Alternatives
Cosy is an innovative tool designed for Slack that enhances community engagement and streamlines onboarding processes. By automating welcome messages and member introductions, Cosy transforms how communities interact and connect within the platform. Users commonly seek alternatives to Cosy for various reasons, including pricing, feature sets, and specific platform needs that may not be met by Cosy. When looking for an alternative, consider the ease of use, customization options, automation capabilities, and integration with your existing tools to ensure it aligns with your community's unique requirements.
Perkoon Alternatives
Perkoon is a trending file transfer service in the productivity space, known for its no-signup, peer-to-peer approach that prioritizes user privacy and simplicity. Users often explore alternatives for various reasons, including needing different pricing models, specific platform integrations, or advanced collaboration features that go beyond core file transfer. When evaluating other options, key considerations include the transfer method—whether it's cloud-based or direct P2P—the true cost structure, and the depth of privacy guarantees. It's also crucial to assess if the service can handle your typical file sizes and workflows, especially in automated or AI-driven environments.