Decide what fits. Build what matters.
Quillmark helps businesses decide whether to build, buy, adapt, or integrate, then take responsibility for the practical work that follows.
The issue is rarely just a missing tool.
Tools are easy to find. The harder question is who understands the workflow, names the tradeoffs, makes the decision, and stays responsible when the system changes.
The decision is unclear.
You are weighing custom software against existing tools, and either mistake can become expensive if the real constraints are not named early.
Some work sits between teams.
Your IT provider may be doing exactly what they are there to do: keeping the network up, managing accounts, securing devices, and supporting the tools you already have. Custom development, integrations, and niche third-party systems often need a different kind of owner.
The system needs care after launch.
A system launches, then slowly drifts away from the real workflow. By the time it breaks or needs to change, no one is sure who owns it.
The work starts before the build.
Clarify the problem.
We start with the workflow, constraints, risks, and ownership questions. A lot of the value comes before a line of code is written.
Build, adapt, or connect what fits.
The answer may be custom software, an existing product, an integration, or a simpler process change. The point is to choose what the business can actually use and maintain.
Stay responsible after launch.
We provide ongoing product ownership and support when the engagement calls for it, so the system is not left on its own once people start depending on it.
AI systems that can be audited.
Some of our work is AI-specific, and it follows one rule learned from years in payments and KYC: in consequential domains, AI output is a draft for a person to judge, not an answer to obey. We build AI tools that cite their sources, keep their evidence, and fit review workflows that compliance teams can defend.
That can mean an AI-assisted review or drafting tool, an MCP server or Claude skill, an integration inside an existing workflow, or an honest recommendation that AI is the wrong tool for the job.
One person by design, with help when the work needs it.
Quillmark was founded and is run by Matthew Ketter. When you hire us, you get one senior person who does the work, makes the tradeoffs explicit, and stays responsible for the result. You know who is accountable, and that responsibility does not disappear after the first conversation.
When a project needs more hands, we bring them in. We work with a trusted network of developers and IT specialists who deliver under the Quillmark name when the scope calls for it. You still have one contact and one line of responsibility.
Matthew has spent more than thirty years doing this as a developer, product manager, tech lead, and co-founder, including in places where small mistakes had real consequences. Experience matters, but judgment is usually what you are paying for.
More about Matthew Ketter ↗Some of the work is public.
Compliance Flag is a Quillmark open-source project: an AI-assisted tool that flags potential SEC Marketing Rule issues and preserves the exact content it reviewed. It was built to make risk easier to inspect while leaving the final judgment with qualified reviewers — and every design decision behind that boundary is documented in the open.
A few useful clarifications.
Does custom software include websites?
Yes. In this context, custom software can include website design and development, web applications, WordPress and Drupal work, plugin changes, integrations, and practical improvements to existing sites.
Can you fix or add features to existing software?
Yes. A lot of useful work happens inside systems that already exist: repairing fragile workflows, adding focused features, improving forms or dashboards, connecting tools, cleaning up technical debt, and making inherited software easier to maintain.
Do you replace our IT provider?
Usually, no. Good IT providers are often doing a different job: keeping infrastructure, devices, accounts, security, and everyday support healthy. Quillmark can work alongside them when a project crosses into custom development, integrations, workflow tools, or software ownership.
Can you partner with a marketing agency?
Yes. Quillmark can work quietly behind the scenes or appear directly with your client as a technical partner. The relationship stays yours: we are not there to solicit, replace, or poach your clients.
Can you partner with an IT support company?
Yes. When your client needs custom development, automation, integrations, or application work outside normal IT support, Quillmark can help under your brand or as a named specialist. We respect the account boundary and do not pursue your client relationship.
Do you only build things from scratch?
No. Sometimes the better answer is to buy, configure, connect, or simplify instead of building something new. We try to make that distinction early, before custom work becomes the default.
Can you help with AI projects?
Yes, when there is a clear business use for it. Our AI work leans toward regulated and high-stakes contexts: review and drafting tools that show their sources, MCP servers and integrations, and plugins or skills for tools like Claude, Codex, or ChatGPT. We are most useful when the output has to survive a compliance reviewer, an auditor, or a skeptical client — and we will say so if a simpler non-AI fix is the better answer.
Can you work with cloud platforms?
Yes. We work across AWS, Google Cloud, Azure, and Firebase. The work is usually application-focused: deployments, serverless functions, storage, databases, integrations, and the practical choices that keep a system maintainable.