AI · Developers · Infrastructure

Capital, crystallized
around the next
generation of AI
developer platforms.

BlackDiamondAI.Fund backs founders building AI software platforms, middleware, and the tooling that the world's developers will use to ship intelligent systems for the next decade.

Begin a conversation→Read the thesis

150+

Years collective experience

75+

Years building MS dev tools

30+

Years operating together

01The Thesis

Every transformative compute era is won by the people who give developers a better surface to build on.

The PC era was won by IDEs and frameworks. The web era by runtimes, package managers, and clouds. The mobile era by SDKs and stores. AI is no different — its long-run value accrues to the platforms, middleware, and tools that let millions of engineers ship reliable intelligent products.

We invest pre-seed through Series A in technical founders building those layers: agent runtimes, model orchestration, evaluation and observability, data and retrieval infrastructure, code-generation platforms, and the migration tooling that brings the existing software estate into the AI-native era.

We are operators first — builders, scalers, and exited founders who have shipped this exact category of product. We often co-invest our own capital alongside the rounds we lead into.

02Why Black Diamond

We're not just technologists —
we're operators who've built,
scaled, and exited.

Black Diamond Partners is built on exceptional depth. Our core team brings together over 150 years of leadership across Fortune 50 software engineering, product development, and executive management — including 75+ years creating and leading developer tools at Microsoft alone. We combine technical precision, strategic clarity, and investor-aligned thinking to evaluate technology organizations not only for what they are today, but for what they can become tomorrow.

Zero to One — Lived It

We've taken products from 0 to industry-leading

Our team understands the 0→1 journey because we've made it — repeatedly — building category-defining developer tools and platforms from a blank page to industry-leading status. That includes some of the most popular developer tools of their generation: Microsoft Visual Basic, Visual Studio, .NET, Visual C++, and Team Foundation Server, plus ArtInSoft (with Microsoft as a major investor) and Mobilize.Net (acquired by Snowflake).

Microsoft Developer Tools

75+ years building the tools devs use daily

Shipped Visual Basic, Visual C++, Visual Studio, .NET, and Team Foundation Server — the languages, IDEs, and ALM infrastructure that an entire generation of professional developers on Windows and .NET grew up on.

ArtInSoft → Mobilize.Net

Founded, scaled, and exited — twice

Founded ArtInSoft (with Microsoft as a major investor) and later Mobilize.Net — the industry leader in assessing, remediating, and modernizing enterprise software systems and a pioneer of commercial AI-assisted code transformation. Acquired by Snowflake.

Three Decades Together

One team. One playbook.

Our core team has collaborated for over thirty years across these companies. We know what 'great' looks like from early traction through growth, scale, and acquisition — and we bring that pattern recognition to every founder and LP we work with.

We bring the clarity, rigor, and insight needed to de-risk your technology investments and unlock value at every stage. With your approval, we will often stake our own capital alongside yours in the rounds we believe in most.

04Where We Invest

Six facets. One category.

Agent runtimes & orchestration

The execution layer for multi-step, multi-model AI systems.

AI middleware

Routing, caching, evals, guardrails — the plumbing every production app needs.

Developer platforms

End-to-end environments for building, deploying, and operating AI software.

Code intelligence

Generation, transformation, refactoring, and migration of the world's software estate.

Data & retrieval infra

Vector, graph, and hybrid systems engineered for AI workloads at scale.

Eval & observability

The instruments that make AI software measurable, debuggable, and trustworthy.

05Get in touch

Three doors.
One inbox.

Every inquiry routes directly to the partners at info@blackdiamond.partners. We read everything and reply to what fits.

Capital, crystallizedaround the nextgeneration of AIdeveloper platforms.