Your Bridge to Kaufman & Company
BridgeStar is Kaufman & Company's own platform, built for its family of operating companies. Vendors and contractors, residents and prospective tenants, employers and institutions, municipal and community organizations, and our own asset management team all work here, from first contact through the life of the relationship.
10 operating companies · one portal from first inquiry to delivery
Contractors
General contractors, subcontractors, architects, engineers, and suppliers working on Kaufman & Company's own projects, run through our platform operating companies.
Land Owners & Brokers
Selling land or an existing asset? Use Submit a Site on thekaufmanco.com for an instant fit score and a call with our team if it qualifies.
Employers & Institutions
Workforce housing programs for health systems, school districts, and large employers: a housing market assessment, employee housing burden index, and development solution.
Municipalities & Community
Entitlement officials, planning authorities, and nonprofit and community organizations working with our development companies on a specific site or project.
Contact form, no account required
Residents
Live in a Kaufman & Company community, Convivium Living, DK Homes, or workforce housing? Log in to pay rent, request a lease renewal, and submit maintenance requests, or apply if you're interested in a unit.
Asset Management Team
Internal: track and manage Kaufman & Company's own portfolio of properties here, from occupancy and operations to capital projects across every platform operating company.
Click any of the above to get started.
Vendors
Recruiting firms, consultants, contractors and suppliers: download the Vendor Onboarding Packet for the step by step process, expected timeline, required documents and contacts. Then create your BridgeStar account to start.
How BridgeStar Works
The same four steps, whoever you are:
Reach Out
Pick the role that fits above, or use Contact if you're not sure yet. Tell us what you're bringing to Kaufman & Company: a vendor relationship, a project, a site, a trade, or a tenancy.
Get Matched
We route you to the right team and the right track. Your BridgeStar workspace is set up around how that engagement actually works, not a one-size-fits-all intake form.
Work Inside Your Workspace
Documents, conditions, signatures, and progress, all tracked in one place with a clear next step at every stage, from first call through completion, signed agreement, or move-in.
Stay Connected
Your workspace doesn't end at project completion. Track record, help desk, and updates carry forward, so the next engagement with Kaufman & Company starts from a relationship, not a cold start.
Inside Your BridgeStar Workspace
Live today, across every track:
Documents
Vendor contracts, construction documents, leases, and land submissions organized by project, with a live field-completeness check before anything is signed.
Checklist
Every onboarding step, project milestone, or maintenance request tracked in one place, with status and the party responsible for closing it out.
Sign & Notarize
Capture signatures on each document and track notarization sessions for the ones that require them.
Payments & Budgets
Resident rent payments, vendor invoicing, and construction draw and budget tracking, all tracked in one place.
A Look Inside Your Workspace
Illustrative preview, not a live account:
One Portal, a Full Family of Companies
Real estate development, construction, consulting, venture, and workforce housing, under one roof:
Frequently Asked Questions
What is BridgeStar?
BridgeStar is Kaufman & Company's own operating platform, the single place where vendors, contractors, residents, prospective tenants, employers, municipalities, and our own asset management team work with Kaufman & Company and its family of companies, from a first inquiry through the life of the engagement.
Do I need an account to reach out?
No. Municipalities and community organizations can reach us through Contact with no account at all. Everyone else creates a free account tied to their specific engagement, so their workspace, documents, and status are private to them and Kaufman & Company.
Which track is right for me?
If you're not sure, that's fine, pick the closest role card above or use Contact and tell us what you're bringing us. Our team routes every inquiry to the right track and the right people inside Kaufman & Company.
Is my information secure?
Yes. Every account requires a password plus a one-time verification code, documents and financial details are encrypted, and access to any single deal or engagement is restricted to that client and authorized Kaufman & Company staff only.
What happens after my project or engagement ends?
Your BridgeStar account stays active. Track record, documents, and history remain available, and our team can reach you directly for the next project or lease, this is meant to be an ongoing relationship, not a one-time transaction.
Ready to get started?
Log in to your existing BridgeStar workspace, or create a new account in a few minutes.
About BridgeStar
BridgeStar is Kaufman & Company's own operating platform, the single place where vendors, contractors, residents, prospective tenants, employers, municipalities, and our own asset management team work with Kaufman & Company. Today that means vendor onboarding, project and construction management, resident and tenant services, and payments and budgets, organized by project, with more of how each track works moving onto the platform over time.
Kaufman & Company
Kaufman & Company is a vertically integrated holding company that buys land and existing assets, funds them with its own capital, and builds, manages and holds them for the long term across its family of operating companies, with day-to-day vendor, project, land, resident, and asset management work managed end to end through BridgeStar, its own operating platform. Through centralized capital allocation, rigorous governance, and strategic oversight, it empowers its operating companies to pursue disciplined, long-term growth, building durable businesses and compounding returns across market cycles.
Its family of companies includes Convivium Living, DanReDev, DEK Builds, Design Build Affordable, DK Homes, Forge Development Partners, Kaufman Development, Kaufman Real Estate & Consulting, Kaufman Ventures, and Lonestar Kaufman.
BridgeStar also powers the live AI assistant on thekaufmanco.com and across every one of its operating companies’ and brand sites, answering visitor questions directly from each site’s own content.
Kaufman Ventures
Kaufman Ventures is the venture arm of Kaufman & Company, backing early-stage startups and building technology-driven platforms that extend the firm’s real estate and investment expertise, including LandBriefing, Spreadsight, and Foundcheck.
Ventures: LandBriefingSpreadsightFoundcheck
Our Family of Companies
Real estate development and platform technology, under one holding platform.
Convivium Living
A vertically integrated platform building tech-forward housing, co-living, co-working, and hospitality environments.
liveconvivium.com →DanReDev
Texas-based investment and development platform: build-to-rent, workforce housing, mixed-use, and luxury residential.
danredevllc.com →DEK Builds
Design, build, develop, and invest under one roof, custom mountain homes, resorts, and master-planned communities.
dekbuilds.com →Design Build Affordable
Mission-driven affordable housing developer proving safe, beautiful, sustainable housing at accessible price points.
designbuildaffordable.com →DK Homes
Custom home building and land acquisition for owners who want a home built around how they live.
d-k-homes.com →Forge Development Partners
Acquires underutilized urban land and delivers quality rental housing in Philadelphia and Orlando.
forgellc.net →Kaufman Development
AI-ready data centers, workforce housing communities, and mixed-use developments, $1B+ in value created.
Learn more →Kaufman Real Estate & Consulting
Principal-side development strategy, feasibility, and land advisory, $2B+ project value.
kaufmanrealestateandconsulting.com →Kaufman Ventures
Backs early-stage innovation across AI infrastructure, robotics, data centers, modular construction, and 3D printing.
dkaufmanventures.com →BridgeStar AI
BridgeStar AI is the artificial intelligence layer behind the BridgeStar platform. It already answers questions for everyone who works with Kaufman & Company, here on bridgestar.ai and now across www.thekaufmanco.com and its family of companies and brands. Kaufman Labs is building what comes next.
Today: BridgeStar Assistant
BridgeStar AI already powers BridgeStar Assistant, the concierge built into the chat widget here on bridgestar.ai. Ask it about BridgeStar, Kaufman & Company, or how to get started, and it will help point you to the right place. The same BridgeStar Assistant now also runs the chat widget across www.thekaufmanco.com and every one of its operating companies and brands, so the same help is available everywhere on the platform, not just here.
What's Next: Keystone
Kaufman Labs, our incubation and testing arm, is building the next generation of BridgeStar AI in house. We call it Keystone: Kaufman Labs' own proprietary large language models, trained and run on ZeroPoint's Project Zero micro data centers instead of a third party's. Keystone is built to power everything on the Kaufman & Company platform, not just one chat widget, starting with BridgeStar Assistant.
What the models can do
Long-running work
Keystone can stay on a task for as long as it takes, carrying it from a first ask to a finished result without needing to be re-prompted at every step.
Computer use
It can operate a computer the way a person would, moving through applications and interfaces to actually get something done, not just describe how to.
Specialized domains
It works across the domains the platform touches every day: architecture, real estate, construction management, asset management, law, finance, and research.
Complex coding projects
It can take on real software projects, not just snippets, writing and maintaining working code across a whole codebase.
Delegating to smaller agents
On a large job, it can break off pieces of the work and hand them to smaller AI agents, then bring their results back together.
Recovering from errors
When something goes wrong partway through, it works through the problem rather than abandoning the task and starting over.
Built to remember, and built to persist
Memory across conversations
Keystone can hold on to what matters about a person across separate conversations, and bring it back when it is relevant later, so no one has to re-explain themselves every time.
Persistence through difficulty
When it hits a wall, Keystone tries another approach, adapts to what it has just learned, and asks a clarifying question when it genuinely needs one, rather than giving up on the original goal.
What that looks like in practice
In practice, that is one model that can walk someone through a financial model line by line, help a tenant understand and navigate an insurance claim, or build a working application from a plain description of what it should do.
How we're building it
Building Keystone is itself a Kaufman Labs engineering project, run in four phases.
Data Engineering & Pipeline
We start with the raw data: extracting it, removing near-duplicate content with MinHash, and tokenizing it with a custom byte-pair-encoding (BPE) tokenizer built on Hugging Face's tokenizer library. From there the data is shuffled and packed into fixed-length blocks, between 4,096 and 8,192 tokens each, ready to train on.
Compute Infrastructure & Cluster Setup
Training runs on clusters of NVIDIA H100, H200, and B200 GPUs, connected with NVIDIA InfiniBand and RoCE networking so the cluster can move data between GPUs fast enough to keep them fed. We distribute the training itself with PyTorch's FSDP or Megatron-LM, and store the data on Lustre and WekaIO parallel file systems built for that kind of throughput.
The Pre-Training Loop
Each model is pre-trained the standard way: a forward pass to compute the loss, then backpropagation with the AdamW optimizer to update it. We watch training stability and the loss curves closely, and roll back to an earlier checkpoint whenever a run drifts.
Post-Training
After pre-training, each model goes through supervised fine-tuning (SFT) and then preference alignment, using reinforcement learning from human feedback (RLHF) and direct preference optimization (DPO), to get it to the point where it is actually ready to help with real work.