Secure S3 File Sharing & Transfer Portal (Self-Hosted & Serverless)

S3ndless File Sharing is a self-hosted, serverless file sharing solution designed for organizations that cannot use external SaaS services for exchanging files. Many companies are restricted from using tools like WeTransfer, Dropbox, or Google Drive due to compliance, security, or data residency requirements. S3ndless addresses this by providing a modern file sharing experience that runs entirely inside your AWS account, using only AWS-managed services. Once deployed via CloudFormation, S3ndless operates without servers to manage. Files are stored in your own Amazon S3 bucket and distributed through your CloudFront distribution. Access to files is controlled using expiring links, optional password protection, and configurable upload restrictions. The included web interface allows users to upload files through a simple drag-and-drop UI and immediately generate secure download links. Expiration rules can be defined based on time or number of downloads. The interface can be customized using a configuration file stored in S3, allowing organizations to apply their own branding, text, and domain. S3ndless is intended for production use in security-sensitive environments where full ownership of infrastructure, data, and access control is required.

• Runs 100% inside your AWS account
• No external APIs, services, or third-party storage
• Files, logs, and encryption remain under your control
• AWS-native security model using IAM, S3, and CloudFront
• Simple CloudFormation deployment and removal

• Sharing files with customers or partners without using SaaS
• Internal file drop or pickup portals
• Temporary file exchange with expiring download links
• Lightweight alternative to managed file transfer portals
• Organizations with strict compliance or audit requirements Typical users include legal teams, financial institutions, insurance companies, healthcare organizations, and enterprises with internal security policies that prohibit external file sharing services.

• Fully serverless architecture using Amazon S3, Lambda, DynamoDB, and CloudFront
• Web-based drag-and-drop file uploads
• ZIP packaging when uploading multiple files
• Download link expiration by time or download count
• Optional password protection for download links
• Optional password protection for the upload page
• Customizable interface (logos, colors, text) via S3 configuration
• Support for custom domains and company-branded URLs
• Deployed entirely in your AWS account with pay-as-you-go AWS billing

S3ndless does not operate as a SaaS platform. After deployment, all components run within your AWS account and are fully visible and manageable through the AWS Console.

• Data stored only in your S3 bucket
• Access controlled via IAM and application-level rules
• Compatible with VPC-based environments
• No vendor access to your files or infrastructure

The solution is deployed using an AWS CloudFormation template. No long-running servers are required, and the entire stack can be removed cleanly at any time.

A live instance of S3ndless is available for evaluation at: https://send.silverlining.cloud  This environment is deployed in our AWS account and allows you to test the user interface, upload workflow, expiration settings, and password-protected downloads. The demo is provided solely for functional evaluation. In production, S3ndless is deployed into your own AWS account using CloudFormation, where all storage, access control, and configuration remain under your control.

S3ndless File Sharing provides a simple and secure way to share files without relying on external services. It is designed for teams that require AWS-native deployment, full data ownership, and a controlled security model while still offering a modern file sharing experience.