Send large files with expiring links and receive files from anyone, serverless in your own AWS account. One-click deploy, open-source core.
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Serverless, self-hosted file transfer for AWS: expiring links, password protection, file requests. One-click CloudFormation.
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Taken from the repository README
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Read the full README ↗Secure, serverless file transfer that runs in your own AWS account. Send files with expiring, password-protected links. Collect files from people who have no account. No servers to run, nothing leaves your account, and one click to deploy.
| Community (Apache-2.0) | Pro | |
|---|---|---|
| Send files with expiring links (time and/or number of opens) | ✓ | ✓ |
| Password protection with brute-force lockout | ✓ | ✓ |
| Large files: resumable multipart uploads straight to S3, up to 5 TB per file | ✓ | ✓ |
| File requests: let anyone upload files to you, without an account | ✓ | ✓ |
| Email the link and get notified on download (Amazon SES) | ✓ | ✓ |
| Activity log per transfer (who opened, which file, IP, country) | ✓ | ✓ |
| Privacy and imprint links | ✓ | ✓ |
| User management, invitations, optional self sign-up by email domain, two-factor authentication with an authenticator app | ✓ | ✓ |
| Guaranteed deletion: sweeper plus an S3 lifecycle hard limit | ✓ | ✓ |
| English and German UI, light and dark theme | ✓ | ✓ |
| Single sign-on (SAML / OIDC: Entra ID, Okta, Google, …) | ✓ | |
| Malware scanning with GuardDuty, downloads blocked until clean | ✓ | |
| Audit log for the whole installation with CSV export | ✓ | |
| Policies: mandatory passwords, maximum lifetime, blocked file types, allowed recipient domains | ✓ | |
| Branding: your name, logo, colors, welcome and footer texts | ✓ |
sendless.yaml in the CloudFormation console. Choose any Region.AppUrl from the stack outputs and sign in.To remove Sendless, delete the stack. The buckets are emptied first, so nothing is left behind.
See docs/deployment.md for parameters, custom domains, email, upgrades and publishing your own release.
Browser ──HTTPS──▶ CloudFront ─┬─▶ S3 (web app, via OAC)
│ └─▶ Lambda function URL (/api/*, via OAC + IAM)
│ ├─ DynamoDB (transfers, requests, audit)
│ ├─ Cognito (senders, admins, SSO)
│ └─ SES (optional email)
└──presigned PUT/GET──▶ S3 (files, private, encrypted, lifecycle-limited)
EventBridge ──every 15 min──▶ sweeper Lambda (deletes expired files)
File bytes never pass through Lambda: browsers upload parts straight to S3 with presigned URLs and download the same way. The API function can only be reached through this CloudFront distribution. The full reasoning is in docs/architecture.md.
npm install
npm run dev # http://localhost:5173 — runs the real API with in-memory adapters, no AWS account needed
npm run dev:pro # same, with Pro features unlocked by a throwaway development license
npm test # unit, service and store contract tests
npm run typecheck
npm run release -- --base-url https://<bucket>.s3.amazonaws.com/sendless
Sign in locally as [email protected] or [email protected] (no password in dev mode). See docs/development.md.
template/sendless.yaml CloudFormation template (the one-click deployable)
packages/shared API types and validation shared by backend and frontend
packages/api Lambda handlers, services, AWS and in-memory adapters, dev server
packages/web React single-page app
ee/ Pro features, under the Sendless Enterprise License
scripts/ dev, build, release, publish
docs/ architecture, deployment, development, selling
Everything outside ee/ is licensed under the Apache License 2.0.
The ee/ directory contains the Pro features and is licensed under the Sendless Enterprise License: you may read and modify it, but using Pro features in production requires a valid license key.
Copyright © 2026 SilverLining.Cloud GmbH.