Is it really unlimited?

Yes. There is no cap on requests and no count of hours. The limits are the two rules: one product, and one queue worked in the order you set.

How do we talk to you?

In writing, in a shared Slack or Teams channel. That is how requests arrive, how we ask questions and how we tell you what has shipped.

Senior engineers at Mercury Labs, the same people who build and run the Company Twin. They direct AI coding agents and review everything those agents produce.

What do you need from us?

Access to the product's code and environments, and someone who can answer questions and approve changes in the channel.

What we offer

Subscription · £15,000 a month

Unlimited developmentA senior engineering team for one product, at one monthly price.

Billing by the hour stopped making sense when AI began doing much of the building. So we charge one price for one product. Send every request it needs, and our engineers build, review and ship them.

Ask about unlimited development

# your-productYour queue

An illustration of a queue at work.

How a request movesFrom a message in your channel to a change in your product.

# your-product

YouMonday

Customers keep asking to export their invoices. Can we add a CSV export to the invoices screen?

Mercury LabsMonday

Yes. One question first: every invoice, or only the ones in the current filter?

YouMonday

Only the current filter.

Mercury LabsTuesday

Built, reviewed and tested. There is a preview on staging for you to try. Say the word and it goes live.

YouTuesday

Looks right. Ship it.

Mercury LabsTuesday

Live. Next in your queue is the fix to the accounts sync.

An illustration of one request in Slack or Teams, from ask to live.

01
Agree the product
We look at the product and its code with you, agree what the subscription covers and open a shared channel.
02
Send requests
Post each request in the channel as it comes up, and put them in the order you want them done.
03
We build and ship
Each request is built, reviewed and delivered to your product, with a written update when it lands.

What you get

As many requests as you need
Features, fixes, integrations and upgrades. Add to the queue whenever you like, and we work through it in the order you set.
A team that knows your product
The same senior engineers stay on it, so nothing has to be explained twice.
Every change reviewed
Engineers direct AI coding agents to build each request, then review and test the result before it reaches you.
A price that does not move
£15,000 a month, whether the month holds five requests or fifty.

Two rules keep the price fixedThey are what let us offer unlimited requests at one price.

One product

The subscription covers one product or system: its code, its data and the tools around it.
The team comes to know it deeply, which is what makes the work fast.
A second product is a second subscription.

In writing

Requests, questions and updates happen in your Slack or Teams, in writing.
You write when it suits you and we reply as we work, so nothing waits for a meeting.
There are no standing calls, and the thread keeps a record of every decision.

How it comparesThree ways to get software built.

Hiring a team

What you pay: Salaries, recruitment and management
When priorities change: Your managers re-plan the team
How you work together: You manage the team day to day

An agency by the day

What you pay: A day rate against an estimate
When priorities change: A change request and a new quote
How you work together: Meetings and status reports