An identity of your own
Choose a Blink handle. No phone number or email address is required for signup.
PUBLIC ALPHA · EXPERIMENTAL
Keep in touch.
Your conversations disappear.
Blink is a private, ephemeral messenger. Send messages and files that expire 24 hours after acceptance — without a phone number or email address.
No phone numberNo emailEnd-to-end encrypted
Your keys stay here
Your private keys live in a locally encrypted vault on your device.
Messages that expire
New messages and files expire 24 hours after the server accepts the send. Reading them does not shorten or extend this time.
Your PIN, when needed
Blink locks after 2 hours of inactivity. An active call keeps the session open; manual lock and Panic PIN remain available. Restarting the browser may require your PIN sooner.
Transfers that resume
Encrypted file transfers resume after a connection interruption, while their saved encrypted data remains available. Progress stays in the conversation so your message field stays in place.
Clear messages, keep the contact
Use Delete All Messages in the conversation menu to clear known messages on this device. Your contact and their copies are kept; messages not yet received may still arrive.
A PROJECT TO TRY, STILL IN PROGRESS
Welcome to the alpha.
You can join publicly on proto.blinkisp.com. This is an experimental version, with no availability or data-retention guarantee.
An evolving service
Messages, calls and notifications may have bugs or be interrupted. Features can change as development progresses.
Use it for testing
Accounts, messages and files may become unavailable or be reset. Keep anything irreplaceable elsewhere and use another service for urgent communication.
A separate alpha account
The app now lives on proto.blinkisp.com. Accounts from the former blinkisp.com app have not been transferred automatically. Create an alpha account to try this version.
Join the alpha ↗
Public access · Experimental service
SIMPLE BY DESIGN
Three steps. You're in.
No phone-based account, no address book to upload. Just you and your contacts.
Create your identity
Choose an @handle and a six-digit PIN for your local vault. This device’s private keys are generated and protected locally.
Find your contacts
Invite contacts by @handle or find public profiles by display name in Discover. Comparing the security code over an independent channel remains optional.
Chat without archives
Send messages, share files and make calls. New messages expire 24 hours after acceptance; earlier messages keep their original expiration policy.
YOUR PROFILE, YOUR CHOICE
Public or private, you decide.
Manage your display name, photo and bio in Settings → Profile, then choose your visibility in Settings → Privacy. Conversations remain end-to-end encrypted.
A private profile by default
Your profile is visible only to your contacts and does not appear in Discover. You can still exchange invitations by @handle.
Discover public profiles
Making your profile public lets other Blink users find you by display name and write to you. Discover also lets you browse their public profiles. Your published name, photo and bio are visible to Blink users.
Pulse — Coming soon
The Pulse tab in Discover is a placeholder for an upcoming feature. Publishing and viewing public stories are not available yet.
PRIVACY BY DESIGN
Less to keep. More room to talk.
Blink aims to reduce retained data without impossible promises. Here is what it protects — and its limits.
✓What Blink offers
- No phone number or email. Neither is required to create your account.
- Private conversations. Your messages and files are end-to-end encrypted.
- Disappearing messages. Your conversations automatically expire according to their lifetime.
- Each device has its own identity keys and encryption sessions. Encrypted history keys are shared only with authorized devices. Blink stores the account identifier, profile and encrypted history on the server.
iWhat you should know
- Contact verification is optional. Blink automatically accepts valid directory key changes and clears previous verified status. Without an independent security-code comparison, a malicious directory could substitute an identity.
- One identity on up to three devices. Link a new device from an existing one; each device keeps its own PIN and encryption sessions.
- Set up encrypted account backup in Settings and keep your recovery key outside Blink. Recovery preserves your identity and saved contacts, and revokes previous devices.
- Recovery can retrieve unexpired messages when the encrypted backup contains the required history keys. Expired messages cannot be restored. Without a previously configured backup and its recovery key, losing all devices can still mean losing the account.
WHEREVER THERE IS A BROWSER
An app without the app store.
Blink works in modern browsers and can be installed as a Progressive Web App (PWA). One account supports up to three devices. Revoke a lost device in Settings → My Devices.
On the new device, choose “I already have an account” and enter your Blink @handle. Open the request on an existing linked device through the notification or Settings → My Devices → Connection Requests, then approve it. Enter the six-digit code shown on the existing device into the new one. Only approve a connection you initiated.
The new device creates its own private keys and encryption sessions. Then choose its local PIN and a different Panic PIN. The temporary connection code does not replace the PIN. The new device retrieves unexpired sent and received messages from the encrypted journal, even while the original device is closed.
Enable Messages and calls in Settings → Notifications to receive message and call alerts. On iPhone, install Blink on your Home Screen first.
Go to Blink ↗GET STARTED ON YOUR DEVICE
Install Blink. Stay connected.
Install Blink before creating your account, then allow notifications when the app asks. Follow the steps for your device.
APPLE
iPhone & iPad
- Open proto.blinkisp.com in Safari.
- Tap Share, then Add to Home Screen. If shown, enable Open as Web App.
- Tap Add and open Blink using its new Home Screen icon.
- Create your Blink account in the installed app.
GOOGLE
Android
- Open proto.blinkisp.com in Chrome.
- Open the ⋮ menu, then choose Install app or Add to Home Screen.
- Confirm and launch Blink from its new icon.
- Create your Blink account in the installed app.
On a computer: use Install app in Chrome or Edge, or File → Add to Dock in Safari on Mac.
NOTIFICATIONS
Turn on alerts in Blink
01
Allow notifications
Open your installed Blink app. Go to Settings → Notifications → Enable, then accept the device’s permission request.
02
If they are blocked
On iPhone: check Settings → Notifications → Blink. On Android: check the notification permissions for Blink or Chrome in system settings.
After activation, Web Push can alert you in the background or on the lock screen. Delivery and sound depend on your phone, network, permissions and Focus settings. Open Blink to verify and answer the call; this is not a continuous native ringtone or an automatic answer.
FAQ
A few things worth knowing.
Is Blink ready for everyday use?
Blink is a public alpha. You can try it, but bugs, downtime and data resets are possible. It is not yet a stable service. The app is available on proto.blinkisp.com; blinkisp.com is its presentation website.
Is Blink free?
Blink is a public prototype that is free to use at this stage. No subscription is required.
Can expired messages be recovered?
Blink does not keep a permanent message history or offer recovery of expired messages.
What happens if I lose my phone or clear my browser?
If another linked device is available, use it to add a replacement and revoke the lost device. If all devices are lost, use your recovery key and previously configured backup. Recovery keeps your identity and saved contacts and revokes previous devices. It can also retrieve unexpired messages if the required history keys were backed up. Your handle and PIN alone cannot recover the account.
Does deleting a conversation delete it for everyone?
No. Delete All Messages clears messages already known on this device and cancels its pending sends, while keeping your draft and contact. Sync does not restore those deleted messages. Other copies are kept, an in-flight send may still arrive, and messages not yet received may arrive later. This does not promise physical erasure of backups or exported copies.
What does my six-digit PIN protect?
The PIN protects the encrypted local vault, which holds this device’s private keys. Someone who steals a copy of the encrypted vault can try to guess the PIN offline: locking the interface does not prevent those attempts. A six-digit PIN offers limited protection against this risk. Protect access to your device as well.
Does Blink know your real identity?
No. Blink does not ask for your real identity, phone number or email address. You create your account with a pseudonym, without civil identity verification.
The server retains only the information needed to operate the service, including technical account and device identifiers, profiles and routing metadata. This information does not automatically reveal your real identity to Blink.
Blink protects your privacy.
Will calls ring when the app is closed?
Enable Messages and calls in Blink Settings → Notifications. Web Push can alert you on iPhone and Android, including in the background and on the lock screen. On iPhone, Blink must be installed on the Home Screen. Sound depends on phone settings; this is not a continuous native ringtone.
PUBLIC ALPHA · STILL EVOLVING
Conversations fade. Stay in touch.
Blink is an experiment in simpler, more private and more ephemeral messaging. To recover your contacts after losing a device, keep another linked device available or set up an encrypted backup beforehand and keep its recovery key.
Join the alpha ↗