Sign it. Own it.

Credit-only document signing for your firm. Your keys, your audit trail, your signed copies — and no subscription tied to seats. You pay for what you send.

Download for Windows How it works

Windows installer — macOS later. The web Workspace works everywhere.

Why Solstice

A signing tool that belongs to the firm using it.

Most signing products rent you seats. Solstice sells you documents and leaves the rest yours.

Credit-only

No per-seat fees, no surprise overages. One pack of documents, spent on what you actually send.
White-label

Mounts under your brand: your accents, your type, your logo. Solstice disappears into the workflow.
Owner-controlled

Your keys, your data, your audit log. Bring your own AI key and the assist costs you less.

In the box

An audit trail

Every send, view and signature, stamped and kept.
Signed copies

Stored with their hash, served only if they match.
Passkeys

Your device signs you in; a passphrase is the fallback.
A Windows app

The same Workspace in its own window.
Live status

The page moves the moment a signer opens or signs.

How it works

Four steps, and the first three only happen once.

1. Upload a template

A PDF, the roles that sign it, the fields they fill. Reuse it for every send.
2. Add documents to your wallet

Buy a pack when you need one. Each document in it costs the same flat price.
3. Send it

Name the signers, prefill what you know, review the facts, send. A reminder is free.
4. Watch it get signed

Every open, sign and decline lands live in the Workspace. The signed copies land beside it.

Pricing

Fifty cents a document. That is the whole price list.

No seats, no subscription, no minimum. Buy a pack of documents when you need one and spend it as you send.

$0.50per document

Every signer on the document, however many
Reminders to anyone who has not signed
The signed copy and its audit certificate, stored with you
Live status, the audit trail, the Workspace and the Windows app
Cancel a draft before it goes out and the document comes back to your wallet.

Security

Built the way a firm that signs things for a living would want.

Passkeys first

Sign in with the passkey on your device; a passphrase is the fallback. Changing a key needs a fresh passkey check.
Keys you set, never see again

Provider keys are encrypted at rest and write-only: the Workspace shows when a key was set, never the key.
Copies that prove themselves

Every signed copy is stored with its SHA-256 and re-hashed on the way out. A changed byte is refused, not served.
Nothing from a third party

Fonts, icons and art ship with the app. No CDN, no tracker, no script you did not download from us.