AI in a law firm: changes across contract versions
The app lines up each version of a contract: the parties' proposals, the lawyers' comments and the client's decisions next to the right passages. The lead lawyer checks the summary.
AI app, paid once
from €3,000 net
Test on your process: €0
You pay 50% after acceptance
How much does an AI app for comparing contract versions cost, and when does it pay back?
Short answer
An AI app for comparing contract versions costs from €3,000 net. In our scenario it pays back in 2 months. Today, checking 50 contracts by hand costs €1,745 a month. With the system, the same work costs €265. The firm and the client assess what the clauses mean and prepare the position for the other side. The test on your process is free.
Statistics
Contracts, data and AI: statistics 2025
−87%
According to Anthropic (2025), work on invoices, memos and other documents takes an estimated 87% less time with AI.
According to Eurostat (2025), 48.8% of EU enterprises that considered AI and did not use it named concerns about data protection and privacy as a reason.
The team gets back about 42 hours of work a month, or 5 working days, and the company €17,755 a year. We count after the time a person spends checking and after the model cost.
50 × 60 min = 50 h × €34.90 = €1,745 a month. With the system, a person checks the output in 15% of the old time (€262) and the model costs €4. That leaves €265. The saving is €1,480 a month, so €3,000 pays back in 2 months.
Assumptions: 60 minutes for a lawyer to list the changes across versions and checking in 15% of the old time are our assumptions. €34.90 an hour is the EU average hourly labour cost for 2025 according to Eurostat, for companies with 10 or more employees. Model cost: Claude Sonnet 5.5, about 30,000 + 2,000 tokens per comparison of a contract with the template, at the ECB rate of 1.1205 USD per euro on 22 October 2026.
foap.com customer service: 95% of replies are sent automatically.
Users from several countries write to foap.com, in several languages. The system reads the entire conversation and the terms of that person, and then sends a response in that person's language. Questions about money and exceptions go to the team with a ready draft, so they have to check and send them.
the system sends the answers itself, without human typing
95%
the system sends the answers itself, without human typing
time from the arrival of the e-mail to the ready response (median)
30 s
time from the arrival of the e-mail to the ready response (median)
e-mails that require a response receive a ready-made draft
100%
e-mails that require a response receive a ready-made draft
less work for every 1000 answers (estimate)
47 h
less work for every 1000 answers (estimate)
Data from foap.com production, October 20-21, 2026. Estimate: 3 minutes for handwritten response.
We built search across a collection of court rulings for lawyers: every claim leads to the exact passage of its source, and a claim without a quote fails validation. The system refuses requests for legal advice. A recorded run of 10 questions cost €0 in external API fees.
“We started with my own AI agent. During the training that followed, I learned to build new applications myself. Today I am bringing this way of working with AI into my business. Working with Syntalith gave me exactly the skills and tools I needed.”
A quote and its place in the document for every change
Permissions by matter and by team
What happens to your data
You choose the test cases. We anonymise them on request.
They stay in the EU and we delete them after the test.
We sign the NDA and the data processing agreement before we receive anything.
After acceptance you keep the code, the test set and the documentation. You pay for licences and model usage directly to the provider.
Questions
How much does an AI contract app cost?
From €3,000 net, paid once. After the 5-day test the build takes 4 to 10 weeks. You get a fixed price before the contract: 50% on signing and 50% after acceptance on your own contracts.
What about professional secrecy?
The firm decides where we process documents and who sees them. We can run the model on the firm's own infrastructure, without sending contracts to an external API.
When does it not pay off?
Below 9 contracts a month the payback takes more than a year. Then it is better to start with ChatGPT or Claude for the team, from €1,150 net, with a project that holds your contract templates.
What do we need to prepare?
3 to 5 finished negotiations with their contract versions and comments, anonymised, and the firm's rules for documents.
What our OpenAI and Anthropic partnerships mean for you.
OpenAI makes ChatGPT and Anthropic makes Claude. We belong to the partnership programs of both companies, so we work with their tools every day and learn from the creators themselves.
Claude Partner Network
01We will select a tool for the task
We implement both ChatGPT and Claude. We check both on your documents, and you choose the one that makes fewer corrections and saves more time.
02Knowledge straight from the creators
We learn from official OpenAI and Anthropic courses and materials. Your team learns about the features and settings that work today.
03Licenses without our margin
You buy accounts directly from OpenAI or Anthropic and receive an invoice from them. We do not add anything to the license.
04Certified engineers
On the team, we have an AWS certification in machine learning and an Anthropic certification in systems architecture on Claude.
Participation in programs does not mean that OpenAI or Anthropic endorses our services.
customer service
