Open Source · AGPL-3.0 · Free Forever

OPENDCF

The open-source standard for real estate finance.
Transparent. Auditable. Unapologetically institutional.


Built on three non-negotiables

Every design decision in OpenDCF traces back to one of these principles.

Auditability

See every assumption, every calculation, every amendment. Know exactly why your returns changed — from IC baseline to exit.

Lifecycle Integrity

From IC assumptions to post-exit analysis. One source of truth. Every version immutably recorded — baseline can never be overwritten.

No Lock-in

Your data, your format, your control. AGPL guarantees it. No vendor can wrap this in a proprietary product without releasing their changes.


Select your mandate

OpenDCF is built for everyone in the investment chain. Find your position.

The Student
The Future Guard
Stop paying for proprietary certificates. Master the underlying logic of a £100M DCF for free.
Open Education
The Individual Advisor
The Rogue Operator
Ditch the fragile VBA spreadsheets. Deliver institutional-grade auditability without the £50k overhead.
Sovereign Modeller
The Investor
The Capital Allocator
Don't take the GP's word for it. Stress-test every assumption in-house with a transparent engine.
Alpha Verification
The Institution
The Incumbent
Replace the black box with an auditable source of truth. Scale your portfolio modelling without Excel.
Enterprise Integrity
The Fund Manager
The Portfolio Architect
Decompose performance from £1B down to the unit level. Track every amendment from IC to exit.
Lifecycle Attribution

Join the waitlist

OpenDCF is in active development. Leave your email and we'll reach out when access opens.

Open Education

Learn real estate finance the way it should be taught.

The traditional route: spend £5,000+ on proprietary certifications that teach you how to operate someone else's black box. You learn the buttons. You never learn the engine.

The OpenDCF route: master the underlying logic of a £100M discounted cash flow model — for free.

Study the same engine used by professionals. Understand every assumption, every calculation, every cash flow. Build your career on knowledge that cannot be taken away when the licence expires.

No vendor lock-in. No exam fees. No proprietary methodology obscuring the fundamentals. Just transparent, institutional-grade methodology — open for inspection, open for contribution.

Learn with Transparency
Open-source documentation · Community support · Real-world case studies · First principles

Sovereign Modeller

Independence without compromise.

You've built your practice on expertise, not software licences. But those Excel models are becoming increasingly fragile, and clients are demanding institutional-grade auditability.

The industry wants you to spend £50k on proprietary tools. We're offering something better: sovereignty.

Deliver transparent, auditable DCF models that stand up to due diligence scrutiny. No subscription fees. No vendor dependencies. No compromises on quality.

Run sophisticated sensitivity analyses, stress tests, and scenario modelling. Present your work with confidence, knowing every calculation can be traced, verified, and defended.

Independence Without Compromise
Institutional quality · No recurring costs · Full control · Portable methodology

Alpha Verification

Trust, but verify.

The GP presents you with a beautiful deck and promises of 18% IRR. The model? Locked away. The assumptions? "Proprietary."

With OpenDCF, you can rebuild their model from first principles and stress-test every single assumption yourself.

Don't rely on someone else's Excel black box. Run your own analysis. Test their rental growth assumptions. Challenge their exit cap rates. Model your own downside scenarios before capital is deployed.

Make allocation decisions based on transparent, reproducible analysis. When the deal goes south, you'll know exactly why — and more importantly, you'll have seen it coming.

Verify Everything
Independent analysis · Transparent assumptions · Reproducible results · No black boxes

Enterprise Integrity

Replace the black box with an auditable source of truth.

Your organisation manages £10B+ in real estate assets. Your modelling infrastructure? A patchwork of Excel spreadsheets, legacy systems, and proprietary black boxes that nobody fully understands.

Scale your portfolio modelling without Excel. Every calculation traceable. Every assumption documented. Every result reproducible.

OpenDCF provides enterprise-grade performance with complete transparency. The entire calculation engine is open for inspection, audit, and independent verification — by your team, your auditors, or your regulators.

Meet regulatory requirements with confidence. Pass audits without anxiety. Scale your operations without compromising rigour. AGPL licensing means no vendor can ever pull the product from under you.

Institutional Grade, Open Source
Audit-ready · Scalable · Standards-compliant · Regulator-transparent

Lifecycle Attribution

From IC to exit. Every assumption accounted for.

You manage a £1B portfolio across multiple assets, geographies, and vintage years. Your LPs want granular attribution. Your auditors want documentation. Your board wants answers.

Decompose performance from £1B down to the individual unit level. Track every amendment from Investment Committee to Exit.

OpenDCF's daily granularity means you can pinpoint exactly when and why performance diverged from underwriting. Was it rental growth? Void periods? Refinancing terms? Capex overruns? The answer is always in the model.

Provide your LPs with transparent, auditable reporting. Defend your management decisions with data, not narratives. Demonstrate value creation with forensic precision.

Complete Transparency
Daily granularity · Full attribution · Audit trail from IC to exit · LP-ready reporting