21 Solutions
How We Work

We solve operational problems. We do not sell a services menu.

Your future business is not buying custom software or AI projects. It is buying ownership, judgment, and technical leverage from a senior team that stays.

Most engagements start at $30K/month. We partner with a small number of companies at a time.

01 / Growth

Your internal tools are breaking under growth

Spreadsheets, disconnected SaaS tools, and duct-taped workflows worked when you were smaller. Now they are bottlenecks, error sources, and scaling limits.

We rebuild the operational foundation — internal platforms, workflow engines, and integrations — so your team can grow without the systems falling apart.

Operational software architecture

What this looks like

Unified dashboards, internal tools that replace manual processes, and systems designed for the way your operators actually work.

What we own

Architecture decisions, build quality, ongoing maintenance, and the judgment to prioritize what matters as you scale.

At Link Biosciences, we replaced a patchwork of Access databases, spreadsheets, and manual workflows with Sigma — a custom platform integrated with production hardware that helped scale a highly custom nutrition operation.

See the full Link Biosciences case study →
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Person Should Not Hold Everything
97%
Repeat Client Rate
02 / Risk

Your software depends on one overloaded person

When one engineer, contractor, or "the person who knows the system" holds everything together, the business is exposed. Turnover, burnout, or a bad week becomes an operational crisis.

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Durable ownership

A senior team that documents, maintains, and evolves systems — not a revolving door of contractors.

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No single point of failure

Knowledge lives in the team and the systems, not in one person's head.

03 / Healthcare

Your healthcare workflows are too manual

Intake, clinical review, coding, billing, and physician orders still run on people doing work software should handle. This is our deepest area of proof.

schedule

10-Day Reduction

At Excelin Health, we cut average 485 completion time by 10 days across a multi-site home health network.

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Zero New FTEs

Automated clinical QA, coding, and order management without adding operational headcount.

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Live Visibility

Unified multi-site dashboards that care operators can actually run — not dashboards nobody uses.

04 / Leadership

You need senior technical ownership without hiring a CTO/team

You need someone who owns outcomes — prioritizing what to build, making architectural decisions, and maintaining what exists. Not a team you manage. Not tickets you triage.

"We are incentivized to build systems that last. Our clients stay because we own the outcome, not just the deliverable."
— 21 Solutions engagement model
Senior technical leadership

Under the Hood

What we actually build

These are capabilities, not products. The work varies by engagement — the model is always ownership.

code

Internal Platforms

Operational tools, workflow engines, and business logic systems built for how you actually work.

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Practical AI

LLM workflows and automation where they create measurable operational value — not AI for its own sake.

hub

Integrations

Connecting SaaS, APIs, and legacy systems into a cohesive operational engine.

devices

Field & Device Tools

Mobile apps, hardware connectivity, and IoT where operations extend beyond the office.

Ready for a technical owner?

If your software has outgrown casual management, let's talk about fit. Most engagements start at $30K/month.