Zero‑Knowledge Encryption
Files and metadata are encrypted at rest & in transit. Even we can't access them without your keys.
Massive File
Support
Send files up to 4 TB effortlessly using chunked AWS S3 uploads.
Multi-Factor Recipient Identity
Choose from email code, SMS OTP, passkeys, password, or public key verification.
Cryptographic Delivery Logs
Get tamper-proof, signed receipts for every transfer.
Real-World Use Cases for Secure, Verifiable File Transfer
Legal & E‑Discovery
Securely send contracts, case files, or evidence with full cryptographic tracking.
Healthcare
Transfer sensitive patient data, imaging files, and lab results in compliance with HIPAA.
Finance & Accounting
Transfer tax docs, portfolios, and client data with proof of delivery.
Professional Services
Secure one-off or intermittent document, diagram, or video transfers.
Why It Matters
Unlike email or cloud file-sharing apps, secure‑transmit is purpose-built for confidential, regulated, and high-risk transfers—providing audit trails, auto-expiry, and full metadata privacy.
Every Feature Designed for Security, Compliance, and Ease
Zero-Knowledge Encryption
Data and metadata is encrypted at rest and in transit.
Multi-Factor Recipient Verification
Choose passkey, email OTP, SMS code, password, or public key per recipient.
Massive File Support
Uses AWS multi-part transfers to handle large files by securely transferring them in manageable segments.
Auto-Expiry & Privacy Enforcement
Set files to self-destruct; data and logs auto-delete, no residual footprint.
Tamper-Proof Audit Logs
Each upload/download event is logged – and the audit log is cryptographically signed.
Per-Recipient Notes & Instructions
Attach private messages tailored to each recipient.
Flexible Account Models
Anonymous small transfers, prepaid pay-as-you-go, or pre-funded team accounts (with proxy access).
Integrity Verification
MD5/SHA-256 hashing ensures no file corruption or tampering.
Browser-Based – No Install
Works across devices—no plugins, no setup.
Open a Tab!
Pay what works for you and send securely until it’s used.
Think of secure-transmit like opening a Tab at a bar — in a professional, enterprise-safe way.
When you open a Tab, you prepay a set amount upfront. That balance is then used as you securely send or receive files. Each transmission deducts from your Tab until it’s used up — with no subscriptions, no recurring billing, and no account juggling. Your whole team can send transmissions against the same Tab. You can add funds to that Tab anytime, or simply open a new one whenever you need.
No Subscriptions
Fund a Tab once and use it as needed. There are no monthly plans, automatic renewals, or recurring charges — when the balance runs out, you can add more funds or open a new Tab.
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Privacy Focused
Built to minimize stored customer data. By avoiding subscription and account-based billing, secure-transmit limits retained personal and financial information.
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Flexible Sharing
Use one Tab across multiple transmissions and users. Securely share access with colleagues or partners without managing individual accounts or licenses.
Built for Scale
Works just as well for one-time transmissions as it does for ongoing workflows. Use it occasionally or regularly — without changing plans or managing users.
How secure-transmit Works
From Upload to Proof of Delivery
1
Set up your Transmission
Choose your Sender and Recipient(s) – and input your transmission information.
2
Upload
Sender uploads the data – at least one file – across a secure AWS channel without needing any software or account.
3
Download
Only Recipients that you named can access the files – after they have verified their identity.
4
Auto-Delete and Audit Logs
Files auto-delete as per the expiration time that you set (but no longer than 30 days). You can view the audit logs at any time during the process – and depending on your payment selection, you can receive cryptographically signed receipts and access logs.
