AI for accounting firms.
We're Musho, an AI studio in Valencia working with firms that handle accounting, payroll and tax filings across Spain. We build AI agents, automations and tools around the way you work, from invoices recorded automatically to paperwork that arrives on time.
A typical day at your firm
- Every invoice for the month arrives by email and someone types it into the software by hand
- At the height of tax season, the phone and the inbox ask the same things at once and there is no keeping up
- Clients' documents arrive when the deadline is already close, after several rounds of messages that someone has to send by hand
- The same questions about deadlines and due dates get answered one by one, often by you
All of this happens because deadlines don't wait and neither does the paperwork. AI is there to take the repetitive work off your plate and give those hours back to the team you already have.
What can we build for your firm?
Every firm works its own way, so the diagnostic tells you what makes sense in yours and in what order.
- 01
Invoices recorded automatically
Every invoice that reaches your inbox is read, classified and entered in your software, with the original filed where it belongs. Your team checks in minutes what used to take hours of typing.
- 02
The phone always picked up
We set up a voice agent that answers the phone with your firm's real details, even at the height of tax season. It can take every call or only the ones nobody gets to, whichever you prefer. If a person is needed, it passes the call on with everything it has gathered.
- 03
Paperwork that arrives on time
We ask each client for the missing documents well ahead of the deadline and keep reminding them until they arrive, so the quarter closes on time.
- 04
Deadline questions answered straight away
An agent that answers the questions that keep coming back on WhatsApp, such as when a tax payment is due or which documents are needed, with each client's calendar and details in front of it. It always introduces itself as an AI, as the law requires.
- 05
We invite a review after every job
When a piece of work is finished, we invite your clients to leave a Google review. Reviews decide which firm people call when they are looking for an accountant for the first time.
- 06
Reports, automatically
Your firm's clients, deadlines and pending work, kept up to date on a dashboard without anyone having to prepare them. You arrive in the morning and everything is already current.
The agent prepares, organises and sends reminders. It never gives tax or employment advice. No decision goes out without a professional's sign-off, and queries that need judgement pass to your team with all the context gathered.
It fits the way you work
Tools should adapt to your firm, not the other way round. If you work with A3, Holded or other software, the diagnostic tells you how to connect AI to it. Your accounts, client files and deadlines stay where they have always been, and you never have to keep two sets of records.
What you already use
A3, Holded or other
What we build
AI agents, automations and tools built around your business
No software yet? In the diagnostic we choose your starting tool with you, either one that fits the way you work or one built for you. The AI is built on top of it from day one.
Your data
Your clients' data stays yours, including the payroll and tax records of every company that trusts you with them. We only work with tools that are contractually prohibited from training on it, we comply with GDPR and we put in writing how it is handled before we start.
How we work with you
The diagnostic puts numbers on what AI can save your firm. Everything else is decided on those numbers.
We analyse how your firm works and in 2 weeks you have a plan showing how much you can save and in what order.
We decide with you what to build and give it to you in writing, with a fixed price for the whole project. If you go ahead with the implementation within 30 days of receiving the plan, the full cost of the diagnostic is credited against it.
We hand it over working, connected to the tools you already use, and show your team how to use it. We stay with you for as long as you need.
Frequently asked questions
How much does it cost to bring AI into an accounting firm?
The first step is the AI Diagnostic, from €1,490. The exact figure depends on the size of your firm and is fixed before we start. We give you a plan made only for your firm, showing how much time and money you can save and where to start. If you go ahead with the implementation within 30 days, we take the full cost of the diagnostic off your implementation.
What results can I expect?
Every firm loses its hours in a different place. It might be typing up invoices, chasing documents or answering the same question 10 times. The diagnostic finds where your team's hours go and what AI can win back, with your firm's own figures in front of you.
Does the AI give tax or employment advice?
No. It prepares, organises and sends reminders, and everything it records stays visible for your team to check. The judgement and the signature always belong to a professional. When a query needs your team, it reaches them with the whole conversation in front of them.
Will this replace someone on my team?
No. What goes away is the work of typing up invoices and chasing documents. Your team can spend those hours on clients and on the matters that need judgement, which are what keep a firm going. The diagnostic tells you how many hours are freed up and from which tasks.
Does it work with A3 or Holded?
The diagnostic checks before we build anything. Holded offers a documented integration, and each case is looked at with your setup in front of us. With A3, Sage or other software, we first check what your version allows and decide the best route with you. If your firm has outgrown your software, the diagnostic will also tell you when a tool built for you makes sense.
What if I don't use any management software?
That's fine. If you keep client files in folders and spreadsheets, in the diagnostic we choose your starting tool with you, either one that fits the way you work or one built for you. The AI is built on top of it from day one.
What if a client would rather talk to a person?
They talk to a person as soon as they ask. The conversation passes to someone on your team with everything said so far in front of them. The agent also introduces itself as an AI from the start, as the law requires.
How long until it's up and running?
The diagnostic is ready in 2 weeks. Implementation depends on what we decide to build, with the timeline and the price fixed in the proposal before we start.
How much of my team's time does the diagnostic take?
It takes 2 weeks from the first conversation to the handover of the plan. From your team we need an initial form and conversations with the people who run each process, arranged around your firm's availability. We do the analysis.
Other sectors we work with

Contact
Shall we talk about your firm?
Tell us how your firm works and we'll tell you where to start.