Contracts.io

Contracts made simple.

The simplest way to make a contract. Describe the deal and read the draft in plain language. One Send, and the other side replies and signs without making an account.

Together

You and the other side, on one contract.

A change lands once, on the document itself, with the answer beside it. Nobody is reading a copy and nobody is waiting on a forward.

The room, drawn in the product's own type — a design of the next surface, not a recording of one.

Create contract

The other side never pays and never makes an account.

How it works

Contracts are simple here. 

A simple place to create a contract. 

A simple place to review one. 

A simple place to agree it together. 

For any jurisdiction, or several at once. 

A simple place for an agent to read one. 

You shouldn’t need a law degree toknow what you’re signing.

Lex, counsel in every room

See it work

One sentence in. A contract out.

Thirteen seconds of the real door: one sentence typed into the field, the governing law picked, and the hand resting on Send.

Real footage of the door, captured 2026-09-02.

How it works

What this is for.

A simple place to create a contract, review one, and do it together — in any jurisdiction you like, or several, with your agents working alongside you.

Say the deal in one sentence, the way you would say it out loud. A whole contract comes back in plain language, with a blank wherever it needs an answer from you.

The field, with a sentence in it and send lit.

Redlines

Back and forth, without the back and forth.

Change one clause. Say why in a line. The other side answers on the same contract — not in a fourth attachment called final_v3.

3·Payment

The Client shall pay each undisputed invoice within thirty (30)fourteen (14) days of the invoice date. Amounts not paid when due carry interest at 1% per month, and no expense above $500 is billable without written approval in advance.

One change, proposed by the other side. Everything else in the clause stands.

The thread

  • You·sent the contract

    Thirty days to pay, the way we said it on the call.

  • The other side·proposed a change

    Thirty days doesn’t fit how we get paid. Can we make it fourteen?

Your answer

A still of the room: the answer to a proposed change is Accept or Propose a change.

Redlines go back and forth in the room. Each change is marked, each acceptance is recorded, and the version everyone is reading is the only version there is.

Together

They open the contract in a browser.

They read it, they reply, and they sign. No account and no fee — the same document you are looking at, at the same moment, from the other side of it.

Your view

Services agreement

3·Payment

The Client shall pay each undisputed invoice within thirty (30)fourteen (14) days of the invoice date.

The other side·proposed a change

Thirty days doesn’t fit how we get paid. Can we make it fourteen?

A still of your side of the contract: the answer to a proposed change is Accept or Propose a change.

Their view

Services agreement

3·Payment

The Client shall pay each undisputed invoice within thirty (30)fourteen (14) days of the invoice date.

No sign-in, no download, no fee. They answer in the contract you sent them.

A still of the other side of the same contract: the clause, and a box to answer in.

The same contract, at the same moment. Not two copies kept in step — one document, read from two sides.

The other side

The other side never pays and never makes an account.

They open a link, read the contract, answer a clause and put their name to it. No password, no software, no fee.

Agreeing to the terms and putting your name to them are two acts, and the contract holds them apart until each one has happened.

What is true here

What you can count on.

Four things that are true of this page right now, before you have done anything at all.

No AI at the door

Nobody is signed in on this page, so nothing you type into the field above reaches a model. Your sentence is read in your own browser, by wordlists and a handful of patterns. The model only ever reads your words once there is an account for the work to belong to.

The field is the real one

It is not a screenshot and not a demo of a control — it is the control the app mounts, with the same Governing law picker and the same jurisdictions in it. Every line on this page can be checked against it.

Nothing moves until you press it

Nothing is emailed. Nobody you name is told anything. Nothing is signed, and files stay with you. All of it waits for you to sign in and then send it yourself.

Accepting is not signing

Agreeing to the terms and putting your name to them are two separate acts. The contract always says which of the two has happened, and who did it.

The other side

The other side has it easy.

They get a link, open the contract in a browser and put their name to it. The rule is the same at every step: the other side never pays and never makes an account, and the redlines go back and forth in the room rather than around an inbox.

No account

They open the contract in a browser, read it, reply in their own words and put their name to it. There is nothing to sign up for and no password to invent.

No fee

We never charge the person you send a contract to. Paying for this is the sender's problem, and on this side of it there is nothing to pay for either yet.

Nothing to install

No app, no plug-in, no reader, no plan. A browser is the whole of what the other side needs, on a phone as much as on a desk.

Already have a contract? Bring it.

Drop the file here or press to choose. It becomes a chip at the door and goes nowhere until you send it.

What it costs

What it costs.

Free to make a contract. The other side never pays.

The room

One room. Everyone in it.

Both sides on one document, at one address, in one state. Nobody is reading a copy and nobody is waiting on a forward.

  • The other side never makes an account.

    They open the contract in a browser, reply to a clause and put their name to it. No account, no fee.

  • Redlines go back and forth in the room.

    Each change is marked and each acceptance is recorded, so the history is the document rather than a mailbox.

  • Accepting is not signing.

    Agreeing to the terms and putting your name to them are two acts, and the contract always records which of the two has happened.

The contract room

Opena room.