AI Consulting + Custom Software

We build AI and Custom Software Systems to solve business problems with lean solutions

Practical AI consulting and custom software — built lean, end to end, and owned by you.

AI ConsultingCustom SoftwareFixed PriceYou Own the Code

Trusted by businesses we've launched

Esquivel Wealth Strategies
R-Voice

Two ways we help.

Most problems come down to either a missing process or a missing tool. We handle both.

01Flagship

AI Consulting & Transformation

Engagements from $8K

Our 4-pillar framework. We audit where AI would actually move the numbers, build the roadmap, guide your team through adoption, and stay on until the metrics move. Strategy, Implementation, Adoption, Monitoring.

See the 4-pillar framework
02

Custom Software

Projects from $1.5K

Fixed-price builds from small internal tools to full platforms. We scope it, quote it, ship it, and hand you the code. No hourly surprises. No SaaS lock-in.

See how we build

Why Build Lean

We're a small team of engineers and operators selling outcomes. AI and custom software are just how we get you there.

Engineers and operators.

1 teamno handoffs

We've run businesses and shipped production systems. We use AI when it's the right tool for the job and skip it when it isn't. Your results come first. Whatever tech gets us there comes second.

Fixed price, honest scope.

0hourly surprises

We scope it, we quote it, we ship it. The number on the proposal is the number on the invoice. Changes get a new quote. Never a silent timer.

You own the code.

100%yours to keep

Every line we write goes into a repo you control. No per-seat licensing. No renewals. No vendor lock-in. If we disappear tomorrow, your business keeps running.

How it works.

The process looks a little different depending on what you need. Pick one.

01

Strategy

Readiness Audit

  • Workflow and data audit
  • High-impact, low-risk targets
  • SOPs and process gaps
  • Business outcomes mapped to KPIs
02

Implementation

Workflows & Agents

  • Connect the tools you already own
  • Off-the-shelf AI where it fits
  • Custom agents where it doesn't
  • Meets your team in Slack, email, dashboards
03

Adoption

Human-First Rollout

  • Tech-curious pilot group
  • Internal case studies from early wins
  • Workshops that kill "AI fear"
  • Ongoing feedback loops with your team
04

Monitoring

Reasoning & Friction

  • Model reasoning checks
  • UX friction and drop-off tracking
  • Business metrics from Pillar 1
  • Pivot if the numbers aren't moving
Integrations

Custom Integrations. Zero Duct Tape.

Stop copy-pasting between apps and exporting CSVs. We build a single custom layer that connects your tools through their public APIs so your data flows automatically.

Real-time data sync. Bi-directional integrations. Webhook support. Event-driven automation.

QuickBooks
QuickBooks
Stripe
Stripe
Salesforce
Salesforce
HubSpot
HubSpot
Procore
Procore
Google Workspace
Google Workspace
Microsoft 365
Microsoft 365
Slack
Slack
DocuSign
DocuSign
Twilio
Twilio
Airtable
Airtable
Notion
Notion
Shopify
Shopify
ServiceTitan
ServiceTitan
Jobber
Jobber
Zapier
Zapier
QuickBooks
QuickBooks
Stripe
Stripe
Salesforce
Salesforce
HubSpot
HubSpot
Procore
Procore
Google Workspace
Google Workspace
Microsoft 365
Microsoft 365
Slack
Slack
DocuSign
DocuSign
Twilio
Twilio
Airtable
Airtable
Notion
Notion
Shopify
Shopify
ServiceTitan
ServiceTitan
Jobber
Jobber
Zapier
Zapier

Book a Discovery Call

30 minutes to discuss your project. No commitment, just a conversation.

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Select a Date

Or email us directly at hello@buildlean.dev

Get a quick software estimate.

Describe what you're thinking. Our AI will give you a realistic scope and price range in about 30 seconds.

Looking for AI consulting instead? Book a discovery call below.

Free instant estimate • No commitment required

Prefer email? Reach us at hello@buildlean.dev