Keys originate on device
The server does not generate the encryption key or receive it in plain text.
Thursday, September 10 · Confirmed launch
Local today.
Encrypted sync tomorrow.
Local SELFLEX will not go away. The planned SELFLEX Sync feature will ship off by default and will work only when you explicitly enable it.
Offdefault state
E2EEencryption target
0records readable by the server
Your choicedata that syncs
THURSDAY, SEPTEMBER 10 · SELFLEX SYNCYour devices talk.
Your devices talk.
The server cannot listen.
Under the target model, data is encrypted before it leaves your device. The transport and storage layer handles ciphertext only; SELFLEX cannot read its contents.
- Optional: Nothing is uploaded until you enable Sync.
- Granular: You approve each data group separately.
- Reversible: You can disable Sync and delete the cloud copy.
- Transparent: The protocol and permission scope will be documented before release.
SELFLEX SyncEnd-to-end encrypted synchronization
OffEncrypted synchronizationNothing happens until you enable it.
Settings and appearanceOptional
Custom categoriesOptional
Excluded websitesOptional
Daily usage summariesOff by default
Visit recordsOff by default
Page titlesOff by default
Search queriesOff by default
This preview communicates a product target; the feature is not available yet.
ZERO-KNOWLEDGE TARGET
What does “the server cannot read it” mean?
This will not be treated as a marketing phrase. A release must satisfy the technical boundaries below.
Encryption happens before upload
Your selected records become unreadable on-device before a network request begins.
Only your devices decrypt
Only devices you authorize can open the ciphertext. The server cannot search its contents.
Recovery limits are explicit
If a recovery key is lost, SELFLEX may be unable to restore the data. Setup will explain this clearly.
PRODUCT ROADMAP
What we are exploring next
Dates will remain uncommitted until the security model and store reviews are complete.
NOWAvailable
Local-first SELFLEX
Safari, Chrome, and Firefox dashboards with detailed analysis, categories, privacy controls, and local backup.
SEPTEMBER 2026In review
SELFLEX Sync for Apple devices
Optional, application-layer end-to-end encrypted sync across iPhone, iPad, macOS, and Safari. The release is in App Store review; it will be announced here once approved.
LATERResearch
Encrypted cross-browser Sync
A device-pairing model that keeps the same zero-knowledge boundary across Chrome, Firefox, and Apple devices.
FUTUREEvaluation
Android experience
SELFLEX already runs on Android through Firefox: add the extension to Firefox for Android and you get the full dashboard. Firefox is the only mainstream Android browser that runs extensions, so reaching the others requires a separate SELFLEX app; a local dashboard and optional encrypted Sync are being evaluated against platform constraints.
THE PRINCIPLE THAT WILL NOT CHANGE
The cloud will never be mandatory.
You will continue to use SELFLEX without an account or synchronization. Enabling Sync will not automatically upload existing local records; you will still choose each data group.