blixtFail-closed identity
A malformed or mismatched fingerprint stops the connection before file data moves.
Windows 0.18.0 · Android 0.1.0 Preview
Big files, straight through.
Blixt tries the shortest secure path from your device to theirs. Choose one file or many, share a private code or QR, then follow progress, speed and time remaining while Blixt handles the route.
Free plan · No card required · Windows installer + portable zip · Android 10+ arm64 debug Preview
Send / Receive firstThe main actions stay visible from the first screen.
Automatic routeDirect first, encrypted relay only when needed.
Verified resumeContinue with authenticated blocks still missing.
Human verificationCompare the separate 6-digit SAS before data moves.
Android PreviewSend, receive, code, QR and live status.
01How it works
Choose, share, transfer.
Start in Blixt, Windows Explorer or the Android share sheet. The main flow stays the same on desktop and mobile.
- Choose one file or a batch. Photos, video, documents, archives and work materials can move together.
- Share one private invite. Copy the transfer code, send the link, or show the QR when the recipient is ready.
- Verify and watch it move. Compare the separate 6-digit SAS, then keep progress, speed and ETA in view.
Sending · 5 files
Files are moving64%
84 MB/s · 03:18 remaining
encrypted · verified blocks
02The shortest available route
Send it. Don’t upload it.
A live Blixt transfer is one end-to-end session. It tries a direct device-to-device path first; when a network blocks that path, an encrypted relay can carry ciphertext without becoming cloud storage. bCloud remains a separate store-and-share workflow.
Cloud storageupload, store, then download
2 moves
Blixt live transferdirect first, encrypted relay fallback
1 session
This diagram compares workflows, not benchmark timings. See the documented evidence and limitations at /benchmarks.
Direct first when both networks allow itEncrypted relay when peer-to-peer is blockedbCloud only when you choose storage and browser sharing
Multiconnect can use more than one available link
Desktop Blixt can coordinate multiple interfaces and continue when one path changes. Public raw direct-transfer benchmark data is still being prepared.Treat the current benchmark page as methodology and internal evidence, not an independent certification.
03Security
Verify it. Don’t take our word.
A human check
Matching digits let both people detect a man in the middle, including a compromised signaling server.
Every block accounted for
Chunks and the completed file are verified. Resume trusts authenticated state, not a guessed offset.
Direct, relay and cloud differ
Relay carries encrypted traffic; bCloud stores files; external Storages keep their own trust boundary.
“A direct transfer stays between the two devices.”When direct is unavailable, the relay carries encrypted traffic; bCloud storage is a separate choice.
No security theatre: Blixt does not claim SOC 2 or ISO 27001 today. The current Android APK is a debug Preview. Read the complete threat model →
04Connectivity
Gets through where others give up.
Automatic mode tries coordinated routes in order. Most people only need to see that Blixt is connecting; transport controls stay out of the main flow.
1stQUIC / ICE directUDP peer-to-peer path
2ndHTTPS directTCP+TLS when UDP is blocked
3rdHTTPS relayFast encrypted rendezvous relay
4thWSS relay · 443Most reachable encrypted fallback
the app shows connecting, reconnecting or complete in plain languageexplicit offline LAN mode is desktop-only todayAndroid Preview uses automatic online routing
05Who it’s for
Built for deadlines, datasets, and audits.
Video & photo pros
Move footage and photo batches without turning every live transfer into a cloud-storage job. Progress, speed and ETA stay visible.
Blixt for video editors →DevOps & engineers
blixt send works in scripts and controlled infrastructure workflows, with verified blocks and resumable active sessions.
Teams with sensitive data
Compare the SAS, understand whether the path is direct or relayed, and choose bCloud only when storage is actually required.
Read the security model →06One core, several ways in
Point-and-click or pipe it into cron.
The desktop app, local web UI and CLI share the same transfer core. Android Preview adds a native mobile Send and Receive flow.
$ blixt send dataset.tar
ocean-vivid-eager-… (code created)
peer connected · direct/ICE (QUIC)
verify (SAS): 055 437
■■■■■■■■■■■■■■ 100%
✓ complete · BLAKE3 verified
$ blixt recv --code "ocean-vivid-…"07Pricing
A flat subscription. Never a per-gigabyte surprise.
Free
$0
Try the full speed on real files.
Basic
$5/mo
Big files, no ceiling.
Most popular
Premium
$15/mo
For heavy media & datasets.
Max
$50/mo
No limits, priority support.
Direct transfer traffic is not billed per gigabyte. bCloud storage and plan limits are listed separately. Full pricing →
Available now · Preview
Blixt is on Android.
Choose one or several files, use the Android share sheet, share a code or QR, and follow speed, ETA and recovery while the transfer is active.
Android 10+ · arm64 · manual APK install
Download APK 0.1.0Read Preview limitations
Debug build: not for sensitive files and not yet distributed through Google Play.
08FAQ
Fair questions, straight answers.
Do both sides need Blixt installed?
For a live device-to-device transfer, yes. A bCloud share link is different: the recipient can download in a normal browser without installing Blixt.
Does every transfer go directly between devices?
Blixt tries the direct path first. If the network blocks peer-to-peer traffic, it can use an end-to-end encrypted relay fallback. The relay carries ciphertext and does not become cloud storage.
What happens if the connection drops?
Blixt reconnects during the active session and requests only the verified blocks still missing. Android Preview does not promise to reconstruct a transfer after the app is force-stopped or the phone reboots.
What are the two codes for?
The transfer code is the private invitation. The separate 6-digit SAS lets both people verify that the encrypted session has no one in the middle. Enforced verification can pause until it is confirmed.
Does it work without internet?
The desktop app has an explicit offline LAN mode. Android Preview currently uses automatic online routing and does not yet offer offline LAN transfer.
Is the Android app ready for everyday sensitive work?
Not yet. The available APK is a sideloaded, debuggable Preview for Android 10+ arm64 devices. Use the Windows release for production work and do not move sensitive files with the current Android build. See Android Preview details →
09Start
Ready to move something big?
Windows
Installer, portable zip, Explorer integration and user-approved verified updates.
Download 0.18.0