Software and systems for modern cannabis operators.
Dub Haven designs, builds, and operates the technology that runs dispensaries, cultivations, and brands. From our flagship POS — Dub Ledger — to custom compliance plumbing and fractional CTO work, we ship what operators actually need.
Founded by Sam Leibowitz
Operational consulting & SLI experience
Dub Ledger live in production
See it at dubledger.com
Native state system integrations
METRC, BioTrack, Leaf Data
Mike builds the systems
Technical co-founder & advisor
Our flagship product, Dub Ledger, is a cannabis-native point-of-sale built for compliance and retail operations. Live now.
View Dub LedgerWhat we do
Services
We build and operate technology for every layer of a cannabis business — from the customer-facing point of sale to the back-office pipelines that keep regulators happy.
POS & Retail Systems
Point-of-sale, inventory, and checkout tuned for regulated retail. Includes Dub Ledger and custom builds.
Custom Software
Internal tools, mobile apps, and integrations that your off-the-shelf stack cannot handle.
Web & Search
Fast, compliant websites and content systems that rank and convert in a restricted ad market.
Data & Analytics
Dashboards, METRC pipelines, and reporting layers that turn compliance data into operational insight.
Integrations
METRC, payment processors, delivery platforms, and ERP connections — built to stay current as APIs shift.
Fractional CTO
Embedded technical leadership for operators scaling past spreadsheets and whiteboards.
Free Tool
Dispensary Website Audit
Run a free, automated scan of your dispensary website. We check SEO, speed, compliance signals, e-commerce readiness, and AI search visibility — then send you a graded report with exactly what to fix.
Comparison
Why operators choose us over off-the-shelf POS
Off-the-shelf POS
Infrastructure
Retrofitted from mainstream retail
Dub Haven
Infrastructure
Built for cannabis from day one
Off-the-shelf POS
Data ownership
Locked into the vendor's platform
Dub Haven
Data ownership
You own the code and data on final payment
Off-the-shelf POS
Exit terms
Exit fees and migration friction
Dub Haven
Exit terms
No exit fees, portable open-source stack
Off-the-shelf POS
Support
Ticket queues, generic CSMs
Dub Haven
Support
Direct engineer access, the people who built it
Flagship Product
Dub Ledger
A point-of-sale and retail operations platform built specifically for cannabis dispensaries. Inventory, compliance, customer accounts, delivery logistics, and real-time analytics — without the bloat of legacy systems.
- METRC-ready state reporting
- Native delivery driver tracking
- Customer loyalty and order history
- Real-time sales dashboards
Selected Work
Case Studies
A selection of projects we have shipped or are actively building. Every project listed here is real, documented, and tracked in our internal systems.
Dub Ledger
End-to-end cannabis POS and retail platform. Built from scratch for compliance-first operators handling thousands of transactions per day across multiple states.
View product IntegrationMulti-State METRC Pipeline
Automated batch upload and discrepancy reporting for a multi-state operator. Reduces manual METRC reconciliation from hours to minutes.
Read more MobileDelivery Dispatch Mobile Suite
Native driver apps with route optimization, real-time compliance checks, and customer ETA notifications. Built for a California delivery operator.
Read moreWho we serve
Industries
Cannabis is not a single market. Dispensaries, cultivators, processors, delivery operators, multi-state operators, and consumer brands each face distinct technical and regulatory challenges.
Leadership
Meet the founders
Sam Leibowitz
Founder & CEO
Sam founded Dub Haven after years of operational consulting in complex regulated industries. He sets strategic direction and makes sure everything we build aligns with what operators actually need.
Mike Berardi
Technical Co-Founder
Mike is the technical co-founder and advisor. He builds the systems, platforms, and infrastructure that power our work. Everything else is a spec — Mike makes it real.
How we work
Process
We do not believe in black-box development. Every engagement follows a four-phase process designed to surface problems early, keep stakeholders informed, and deliver working software on a predictable schedule.
Discovery
We map your current stack, compliance posture, and bottlenecks in a single structured session. No generic pitch deck — just a clear picture of what is working and what is not.
Systems Design
Architecture, data flow, and integration plan tailored to your state regulations and operational model. We document every API connection before we write production code.
Build
Sprints with working demos every two weeks. You see progress, not promises. We deploy to staging early so your team can test real workflows.
Launch & Support
Production deploy, staff training, and a support window that actually responds. We monitor error logs and performance metrics for the first 30 days.
100%
Compliance-native
< 4hrs
Response time
30d
Post-launch support
6
Industries served
Common questions
FAQ
What is Dub Ledger?
Dub Ledger is our flagship point-of-sale and retail operations platform built specifically for regulated cannabis dispensaries. It handles inventory, compliance, customer accounts, delivery logistics, and real-time analytics.
Who does Dub Haven work with?
We work with dispensaries, cultivators, processors, delivery operators, multi-state operators, and consumer brands across the United States.
What does your process look like?
Every engagement follows four phases: Discovery, Systems Design, Build, and Launch & Support. We start with a structured session to map your stack, then design architecture, ship working demos every two weeks, and provide 30-day post-launch support.
Do you only sell Dub Ledger, or do you build custom software too?
Both. Dub Ledger is our turnkey POS product. We also design and build custom software — internal tools, mobile apps, API integrations, and workflow automation.
How quickly can we get started?
Most operators who reach out get a response within four hours and a concrete roadmap within a week. A typical POS engagement begins with a two-week discovery phase.
Ready to stop fighting your tech stack?
Tell us what you are running today and what is breaking. We will tell you honestly whether we can help. Most operators get a response within four hours.
Book a consult