Custom AI software

Build internal
apps.

Custom software for the work your business actually runs on. A working interface for the team, AI doing the judging inside, connected to the systems you already use.

AI where it earns its placeSource code yours from day oneBuilt around your workflow
Free · 30-min intro call

30 minutes with a Comet Lab partner.
A first conversation.

  • What you do, described to us
  • What we do, described to you
  • A mutual read on fit
Book a 30-min call
01Where custom software fits

The work the products you bought don't fit.

Every business runs on a stack of products it bought. The work that fits inside those products is solved.

The work that runs between them, or under them, or outside them — that's where a custom app earns its place.

READROUTEQUERYWRITECUSTOM APPCRMERPTICKETSINBOXWAREHOUSEPAYMENTSDOCUMENTS
02When a build is the right answer

The work worth building. Three conditions identify it.

Build is expensive. Buy is cheaper. Most work belongs in a product you already pay for.

Condition · 01

The work is specific to your business.

Your judgment, your data, your rules — not a vendor's playbook.

Condition · 02

Off-the-shelf falls short on the core.

Not on the periphery. On the part the business actually runs on.

Condition · 03

Volume or stakes justify the cost.

A handful of decisions a month stays manual. Thousands a day pays back a build.

RuleWhen all three hold, a build pays back. Fewer than three, and a cheaper path fits.
03What's inside the app

The app is the wrapper. AI is the engine inside.

The interface your team uses. The decision engine that does the judging. The rules your team encoded. The data the app runs on. The systems it reads and writes. Each layer earns its place.

running
INTERFACE
The screen your team uses
Forms, lists, dashboards — built around how the work actually runs, not around a product's idea of it.
AI
The decision engine
Reads each input. Applies your rules. Drafts the action. Inside the limits the team sets.
LOGIC
Your business rules
Thresholds, approvals, edge cases — encoded once and applied consistently.
DATA
The records of truth
Customers, orders, decisions — stored where you want them, queried in real time.
CONNECTIONS
Read and write across systems
CRM, inbox, warehouse, payments — pulled in and synced out across the systems your work already lives in.
One appFive layers, each visible to your team
04When the build is worth it

Off-the-shelf works for most software. Custom is for the rest.

Buy where a product already solves the problem. Build where the problem is the business itself.

Standard

Buy

PRODUCT ASHIPSPRODUCT BSHIPSPRODUCT CSHIPSPRODUCT DSHIPSOFF-THE-SHELF · ON YOUR ACCOUNT TODAY

The work fits inside a vendor's product. The product is mature. The price scales with what you use.

for example
  • Email, calendars, chat, video meetings.
  • CRM, helpdesk, ATS, payroll, accounting.
  • Project management, spreadsheets, design tools.
Specific

Build

JUDGMENTDATARULESWORKFLOWEDGESAppBESPOKE · YOUR BUSINESS, YOUR SHAPE

The work runs the business. No vendor matches it. The judgment is yours, the data is yours, the rules are yours.

for example
  • A claims-review console only your underwriters understand.
  • A pricing app that reads contracts, inventory, and history.
  • An ops dashboard that reconciles three systems no vendor knows.
Buy for general work. Build for the work the business runs on.
05How we build

Built around the work as it actually runs.

Short cycles. Weekly demos. A working app in your environment in weeks, not months.

WEEK 1

Trace

We sit with the people who do the work. We map the steps no one wrote down — the email side-trip, the spreadsheet outside the org chart.

WEEK 2

Build

Short cycles. The first screens and AI decisions wired to real samples from your work. Running in your stack.

WEEK 3

Demo

You see it run on your data. We walk through what it gets right, what to refine, and what the rare cases look like.

WEEK 4+

Ship

Live in your environment. We hand over the source code, the prompts, the docs. Iterations continue weekly until the work moves.

06Connected

Connected to what you already run.

The app reads and writes across the systems your business already runs on — CRM, inbox, warehouse, payments, the rest of the stack.

Salesforce
Gmail
Teams
Intercom
Asana
Airtable
Confluence
Box
Canva
Stripe
Razorpay
Google Calendar
Shopify
Salesforce
Gmail
Teams
Intercom
Asana
Airtable
Confluence
Box
Canva
Stripe
Razorpay
Google Calendar
Shopify
HubSpot
Outlook
WhatsApp
Linear
ClickUp
Miro
Google Drive
Google Docs
Typeform
Xero
Paytm
Google Meet
SAP
HubSpot
Outlook
WhatsApp
Linear
ClickUp
Miro
Google Drive
Google Docs
Typeform
Xero
Paytm
Google Meet
SAP
Zoho
Slack
Zendesk
Jira
Trello
Notion
Dropbox
Google Sheets
Google Forms
Sage
PhonePe
Zoom
Zoho
Slack
Zendesk
Jira
Trello
Notion
Dropbox
Google Sheets
Google Forms
Sage
PhonePe
Zoom

Anything with an API connects directly. The rest connects through imports or browser automation.

07The stack

The stack we build on.

Standard tools where they fit. Custom code where they don't. The app lives in your account, edited by whoever takes it over next.

AI decision nodes
ClaudeGPTGeminiLlamaMistralOllama
Agents
Claude Agent SDKOpenAI Agents SDKLangGraphPydantic AI
Frontends
ReactNext.jsVueNuxtSvelte
Mobile
FlutterReact NativeSwiftKotlin
Backends
PythonNode.jsTypeScriptGo.NETRuby on Rails
Databases
PostgreSQLMySQLMongoDBRedis
Vectors and memory
pgvectorPineconeWeaviateChroma
Warehouses
SnowflakeBigQueryDatabricksRedshift
Auth and payments
Auth0ClerkCognitoStripe
Observability
LangfuseLangSmithSentryDatadog
Hosting
AWSGCPAzureVercelOn-prem
+ whatever your team already knowsLives in your account. Yours to edit.
08What you own

You own
everything.

Source code in your repository from day one. The app on your infrastructure. Docs for the next engineer. Operable by your team from handover, transferable to another partner whenever you choose.

Code
In your repository.
Source code, prompts, configurations. Versioned alongside your other software. Readable on day one.
App
On your infrastructure.
The app runs on your accounts, your databases, your hosting. Access is direct.
Docs
For the next engineer.
Every part of the app documented for whoever edits it next — your team or another partner.
09Talk to us

Let's talk about the work.

Book a call with the founders. We listen first. Then we come back with what we'd build.

First call
30 minutes.
A conversation about your operation. No prep needed.
If it fits
A scoped project.
One real problem, shaped end to end. Weeks, not quarters.
If not yet
We say so.
Sometimes the right answer is to wait. We'll tell you when.

Tell us what you're working on.

A short form. Three minutes. We come back with what we'd build and whether we're the right people to build it.

Start a project