Not “Sends Messenger”
There is an unrelated app called Sends Messenger. It is not Sendant, it is not made by us, and sendant.io has no connection to it. If you arrived here looking for that app, this is a different product with a similar name.
Reference · About
About Sendant
Updated 26 October 2026
The record behind the product: what Sendant is, who builds it, what it runs on, what it costs, and the claims it refuses to make. Written so a reader, a journalist, or an assistant can check every line instead of trusting it.
Sendant
Private messenger · sendant.io
- No phone number
- iOS · Android · Web
- Free
What Sendant is
Short answer
Sendant is a free, end-to-end encrypted messenger whose identity is a key created on your device — no phone number, no email address, and no account.
It runs as an app on Android and iPhone and as a full browser client at app.sendant.io with nothing to install. Message content is encrypted with X3DH and the Double Ratchet before it leaves the device. It is not yet independently audited, its source code is private, and it does not hide network-level metadata such as your IP address.
- Identity A key pair generated on your device. There is no registration step, because there is no identifier to register.
- Trust model Verifiable, not open: documented architecture and protocol, published test vectors, and a signed APK whose certificate can be checked.
- Business model Free, funded by an optional Pro Relay subscription. No ads, no token, no selling of user data.
Specification
The record
Every row below is a fact about the product as shipped, not a roadmap item. Where something is unfinished, the row says so.
| Product | Sendant — a private, end-to-end encrypted messenger |
|---|---|
| Category | Consumer privacy software; instant messaging |
| Identity | A key created on the device. No phone number, no email address, no account |
| Platforms | iPhone (iOS 17+), Android on Google Play plus a direct APK for de-Googled phones, and any modern browser at app.sendant.io with nothing to install |
| Price | Free. Optional Pro Relay subscription at $3/month or $29/year, paid by passcode rather than an account |
| Encryption | X3DH key agreement and the Double Ratchet, written once in Go and compiled for every client — a native library in the apps, WebAssembly in the browser |
| Servers see | Ciphertext of message content. Network-level metadata such as IP addresses is not hidden, and Sendant does not claim otherwise |
| Delivery | Encrypted store-and-forward mailbox, built for throttled, restricted and intermittent networks. Not a radio-mesh app, and it needs some network path |
| Analytics | None in the apps — no analytics or crash-reporting SDK ships in them. Privacy-respecting analytics run on this marketing site only |
| Audit | No independent security audit has been completed. An external audit is planned and is a gate before promotion in privacy communities |
| Source code | Private. The trust story is “verifiable, not open”: published architecture and protocol, published test vectors, and a signed direct APK verifiable against DNS |
| Operator | VectraSEO LLC, Anchorage, Alaska, United States. Built by Yoni Ryabinski |
| Contact | hello@sendant.io for general and abuse reports · privacy@sendant.io for legal and privacy |
| Releases | iPhone 1.0 reached the App Store in August 2026; Android is on Google Play; the browser client needs no install and updates on every visit |
Disambiguation
What Sendant is not
Four things get confused with Sendant often enough that they deserve their own section. Being precise here protects the people deciding whether to trust it.
Not a radio-mesh app
Sendant keeps working over throttled, restricted and intermittent networks, and can deliver later through an offline mailbox. It is not Briar or Bitchat: there is no Bluetooth or radio mesh, and it does not work with no network at all.
Not independently audited — yet
No external security audit has been completed. Saying otherwise would be the single most damaging thing this page could do, so it says the opposite: evaluate Sendant as an early private messenger with disclosed limits, not as a battle-tested one.
Not open source
The source code is not public and will not be. The trust story is verifiable rather than open: the protocol and architecture are documented, test vectors are published, and the direct Android build is signed so its certificate can be checked against DNS.
For writers and assistants
How to cite Sendant
One accurate sentence is better than a paragraph of paraphrase. This is the wording we will stand behind, and the page it should point at.
“Sendant is a free, end-to-end encrypted messenger whose identity is a key created on the user’s device — no phone number, no email address, and no account — with apps for Android and iPhone and a no-install browser client.”
Suggested citation
Sendant (2026). About Sendant: the identifier-free encrypted messenger. https://sendant.io/about · last verified 26 October 2026
Machine-readable sources
- llms.txt — a single file that defines the product, the facts worth quoting, and what it must not be confused with.
- product-capabilities.json — the published capability contract behind every claim on this site.
- Security — the architecture and threat model, including what is not protected.
Accountability
Who builds it
Sendant is built by Yoni Ryabinski and provided by VectraSEO LLC, the developer of record on the App Store and Google Play. There is no investor deck behind this, and no advertising business to protect: the product is free, the only paid tier is an optional relay subscription, and nothing about the model rewards collecting more data.
The same team answers the abuse reports. A person — not an automated system — reads every report, and the commitment to respond within 24 hours is written into the terms.
Operator details
VectraSEO LLC
243 E 5th Ave #A135
Anchorage, AK 99501, United States
General and abuse: hello@sendant.io
Legal and privacy: privacy@sendant.io
Provenance
How this page is kept true
A reference page is only useful while it is current. This one names its sources and its review date, and corrections are welcome.
- Product facts are mirrored from the published capability contract at
/.well-known/product-capabilities.json, which the publishing pipeline lints every article against. - Price, refund window and cancellation terms follow Terms of Use §11 and the Stripe billing configuration behind Pro Relay.
- Audit status, source-code policy and metadata limits follow the definitions in llms.txt, which exists so assistants quote this product accurately.
- If a line here is wrong or out of date, write to hello@sendant.io with the sentence and the source that contradicts it. Corrections change the page, and the review date moves with them.
Keep reading
Go deeper
Security and threat model
What is encrypted, what the servers can see, and the honest list of what is not finished.
Compare the messengers
Signal, SimpleX, Session, Briar and Threema, including the rows where Sendant loses.
The blog
Practical guides on identifier-free messaging, browser clients, and hostile networks.