01
AI Applications
AI agents, assistants, LLM integrations and workflow automation, built with permissions, approval steps and traces.
Comtau · Software studio
We build the software your business runs on, and the technical leadership behind it.
Comtau is a software development company. Eight specialist practices, from MVPs and customer portals to ERP, CRM integrations, AI applications and fractional CTO leadership, share one architecture-first way of working.
- Comtau Inc.
- Registered in Delaware, USA
- Eight service families
01 Direct the technology
- Fractional CTO and technical leadership
02 Build products
- Web applications and portals
- Mobile applications
- MVP development
- Corporate websites
03 Connect and run the business
- AI applications
- Business systems
- CRM and integrations
01 What we build
Products, the systems behind them, and the leadership that connects both
Most companies do not need one more vendor. They need products that work, systems that agree with each other, and someone accountable for the technical decisions.
Build products
Startups, SaaS companies, product teams
MVPs, web applications, mobile apps and corporate websites, from first release to scale.
Connect and run the business
SMEs and established companies
Business systems, CRM and integrations, and AI applied to real workflows, so records, data and processes agree.
Direct the technology
Founders, executives, investors
Fractional and interim CTO leadership, architecture review, technical debt and due diligence, whoever builds the software.
02 Service ecosystem
Eight specialist service families
Each family is run as its own specialist practice with its own pages. Choose the closest one; the overview explains how they connect.
02
Web Applications & Customer Portals
SaaS products, customer, partner and supplier portals, booking systems and marketplaces, with roles, workflows and integrations.
03
Business Systems
Internal tools, ERP, inventory, manufacturing and process-automation software built around how the work actually moves.
04
CRM Integrations
Custom CRM development, customization, migration and the API and systems integrations that keep your tools in sync.
05
Mobile Applications
iOS, Android, Flutter and React Native apps, from first release through enterprise rollout and maintenance.
06
MVP Development
Scoped first versions of SaaS, web and mobile products: discovery, a release that tests the risky assumption, and what comes after.
07
Corporate Websites
B2B, SaaS, professional-services and landing-page websites that explain complex offers and capture qualified leads.
08
Fractional CTO / Technical Leadership
Fractional, interim and advisory CTO leadership, architecture review, technical debt and due diligence.
03 Selected capabilities
Specific problems we are asked to solve
Customer and partner portals
Web applications and portals
Secure self-service for the people outside your company, with roles, records and integrations.
Process automation
Business systems
Workflows, approvals and handovers moved out of email and spreadsheets into software.
CRM and system integration
CRM and integrations
Data that stays consistent across the CRM, ERP and every tool around them.
AI agents and assistants
AI applications
Agents that use your tools and data, with permissions, human approval and a full trace.
iOS, Android and cross-platform apps
Mobile applications
Native and cross-platform mobile applications, including enterprise rollouts.
SaaS from first release to scale
MVP development
Multi-tenant products, starting with an MVP that tests the risky assumption.
Legacy modernization
Business systems
A staged way off ageing software without stopping the business that runs on it.
Architecture review and due diligence
Fractional CTO and technical leadership
Independent assessment of a system, its debt and its risks, before you commit or invest.
04 How we work
Each stage hands a written output to the next
- 01
Assess
Understand the situation, the system and the constraint before proposing anything.
- 02
Architect
Make the significant decisions explicitly and write them down with context, options and consequences.
- 03
Decompose
Split the work into bounded units, each stating what it may change and the checks that prove it.
- 04
Execute
Build in small, observable steps, AI-assisted where it helps and always under human control.
- 05
Verify
Close each unit with the checks that were run, their results and an independent review.
- 06
Hand over
Decision records, plans and handoff notes stay with your company, not with us.
05 Engineering practice
Credibility comes from how the work is run
- 01
Architecture before code
Significant decisions are written down with their context, options and consequences before implementation depends on them.
- 02
AI-assisted, human-controlled
Comtau builds its own software with AI coding agents inside bounded units of work. People own architecture changes, new dependencies and releases.
Read the internal build case - 03
Independent verification
Every unit of work closes with the checks that were run and an independent review. Whoever built it does not sign it off.
- 04
Platform coverage
iOS, Android, Flutter and React Native for mobile; multi-tenant SaaS, portals and API integrations for the web; CRM and systems integration behind both.
See mobile app development - 05
Context stays with you
Decision records, plans and handoff notes are produced throughout, so your team can continue without a dependency on us.
06 Project proof
What we can show today, and what we do not claim
Case study
Building software with AI coding agents without handing them control
An internal build, shown with its decisions and evidence: how bounded units of work, independent review and human approval keep AI-assisted delivery accountable.
More work is listed in the case study library.
Not claimed, or not published yet
- Client case studies are published only with client approval. Today the library holds one internal build.
- No client logos, testimonials, headcount or results figures appear on this site.
- Autonomous agents are not claimed: agents work one bounded unit at a time, under a person's control.
07 Insights and expertise
Guides for the decisions that come first
The drivers behind a budget (roles, workflows, integrations, data migration) and how to compare quotes.
Entities, workflows, integrations, migration and permissions, with scope tiers and how to compare quotes.
Guides, frameworks and comparisons on leadership, architecture, technical debt, due diligence and AI systems.
Next step
Not sure which service fits? Describe the situation.
Start with what is happening, not with a service name. We will point you to the right specialist team, or tell you plainly if Comtau is not the right fit.
Useful to have, not required
- The situation. What is happening and why now.
- The systems. Roughly what exists today.
- The decision. What has to be decided, and by when.