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Technology & AI

Operator-led technical
due diligence for investors
who need to get the
technology right.

Buy-side diligence, sell-side readiness, portfolio value creation, and an AI practice that runs from assessment to hands-on implementation. We translate deep technical findings into the commercial language your investment committee acts on.

1,500+
Investments Supported
350+
Companies Assessed
90%
Repeat Clients
$190B+
Transaction Value
20+
Avg. Leadership Experience

The comfort you were able to give us on the technology position and capabilities, especially the differentiation and defensibility aspects, were a key part of our conviction to push the deal over the line with clear risk mitigation timelines and costs. I look forward to working with you on future opportunities.

Partner, leading UK growth equity
Edge-AI & IoT surveillance
Deal closed
Trusted by global investors
KKR EQT Carlyle Oakley Capital Montagu Eurazeo Insight Partners TA Associates
Recognized
Real Deals
Tech & Cyber DD Provider of the Year
The M&A Advisor
Due Diligence Service of the Year
The Drawdown Awards
Operational DD Provider · Finalist
Client Outcomes

How we've helped.

All engagements anonymized per client confidentiality
What We Do

Four Practices.
One Standard.

Every engagement is scoped around your deal, not a generic checklist. We work at deal speed, alongside your team, with the goal of one question answered: so what does this mean for the investment?

Buy-Side
Buy-Side Technical Due Diligence
CTO practitioner-led assessment of architecture, AI stack, code, team, and remediation cost. We connect the dots across every dimension so you get the complete commercial picture before you commit.
Learn more about Technical Due Diligence
Portfolio
Value Creation
Post-acquisition, the real work begins. We embed with portfolio companies across AI transformation, architecture modernization, cybersecurity, data strategy, and executive advisory to find, quantify, and fix what matters most.
Learn more about Value Creation
Sell-Side
Sell-Side Technical Due Diligence
Get ahead of buyer scrutiny with a rigorous Vendor Due Diligence (VDD) report. We assess your technology through a buyer's lens, surface and address risks, and produce trusted documentation that protects your valuation narrative throughout the process.
Learn more about Sell-Side Technical Due Diligence
AI
AI Practice
Across the whole lifecycle: rapid assessment and AI due diligence before the deal, then maturity baselines, a 100-day plan, and hands-on acceleration in the portfolio. We assess it, and we build it.
Learn more about the AI practice
AI Practice

AI isn't a feature we assess.
It's a dimension we build.

AI runs across the whole investment lifecycle. We validate the thesis before you invest, baseline maturity and write a costed 100-day plan once you own the company, then embed with the team to turn that roadmap into EBITDA. From data foundations to models, the SDLC, and go-to-market.

Led by operators who have held the roles they advise. Real CTOs, not career consultants. Transformation is in our DNA, and the work does not stop at the report: we follow on and implement.

For private equity across the portfolio, and for software and tech-enabled companies going deep on AI in their product, their SDLC, and their operations.

We were building AI systems long before it became a boardroom talking point, across financial services, healthcare, legal tech, manufacturing, IoT, and enterprise software.

Explore the AI practice
The AI practice, across the lifecycle
01
AI Rapid Assessment
Pre-investment, outside-in. What is real versus marketing, and how defensible the space is. Fast enough for a live deal.
02
AI Due Diligence
Pre-investment, deep access. How mature, risky, valuable, and defensible their AI really is, tied back to the thesis.
03
AI Maturity & Roadmap
Once you own it. A six-dimension baseline (strategy, people, data, technology, governance, defensibility) and a costed 100-day plan.
04
AI Acceleration
We embed with the team and ship it: data, models, the SDLC, and go-to-market. The roadmap becomes EBITDA, not a slide.
05
AI Sell-Side Prep
At exit. A buyer-ready AI narrative that preempts diligence questions and protects the valuation story.
06
AI Risk & Compliance
EU AI Act readiness, ISO 42001, and governance frameworks for high-stakes AI deployments.
Why RingStone

Not all due diligence is equal.We connect the dots.

The difference between a junior-heavy generalist report and a senior operator-led assessment often determines whether a deal's technology risk is understood, priced, or missed entirely.

Dimension
RingStone
Others
Who leads
Senior CTOs and operators who have held the roles they assess. They know what good looks like.
Junior analysts with senior oversight. Technical experience varies significantly.
How decisions are made
Data-driven, not opinion: every maturity rating, risk, and remediation cost is grounded in data we gather and benchmark, so conclusions are quantified and defensible.
Ratings rest on opinion and small samples, with little hard data behind the conclusions.
AI
Assessment through implementation: real CTOs who have built and shipped AI, embedded from the 100-day plan to EBITDA.
A checkbox in a report. Advice and frameworks, rarely hands-on. Slideware, not shipped.
After the report
We stay and transform: embedded delivery from the 100-day plan through to measurable EBITDA, by the same operators who wrote it.
The report lands and the engagement ends. Execution is left to someone else.
Software depth
Software-specialist methodology developed across 1,500+ engagements in software, SaaS, and tech-enabled businesses.
Generic methodology applied broadly. Not built for software-heavy PE transactions.
Output
Investor-ready reports where every finding is tied to a business implication, risk rating, and remediation cost.
Dense technical reports with findings. Investors left to interpret commercial implications.
Sell-side practice
A dedicated sell-side practice with VDD reports, management coaching, and investor Q&A support through close.
Rarely offered as a core practice. Often an extension of buy-side work.
Tech-enabled businesses
Purpose-built assessment tracks for both software-native and tech-enabled businesses, where digital is core but not the entire product.
Pure software focus. Tech-enabled businesses fall into a generalist bucket.
1,500+
Investments Supported
350+
Portfolio Companies Supported
30+
Countries Covered
20+
Avg. Leadership Experience
Your partner from investment to exit.
What clients say
The firm they keep coming back to.
How We Think

Every finding tied to what moves the needle.

We don't report technology for technology's sake. Every risk, every opportunity, every recommendation is anchored to one of three commercial levers that determine deal value.

Revenue

Does the technology support growth? Can it scale to the next stage? Will product limitations cap the revenue opportunity, and at what cost to fix them?

Growth & Scalability

Cost & Margin

Where is money being wasted? What technical debt is silently eroding margins? What inefficiencies can be unlocked post-acquisition to drive EBITDA improvement?

Efficiency & EBITDA

Exit Multiple

What technology risks threaten the narrative at exit? What can be positioned as a strength? How does the tech story hold up under scrutiny from the next buyer's CTO?

Reputation & Exit
Resources

Take our thinking with you.

Three starting points for investors and operators who want a deeper look at our practice and deliverables.

AI Practice Deck

Inside Our AI Practice

How we assess, plan, and build AI across the investment lifecycle, from rapid assessment to hands-on acceleration.

Free Guide  ·  12 Pages

The Definitive TechDD Infographic

The 6-stage process, deal breakers, common red flags, what good targets look like, and the value creation playbook. Everything in one place.

Sample Deliverable

TechDD Sample Report

See how we structure findings, risk ratings, evidence, and the commercial implications your IC acts on. A redacted, real-format example.

Workshops & Talks

We bring you the insights.

All sessions
CxO Forum Talks

For Technology & Business Leaders

Keynotes and interactive sessions for CTOs, CIOs, and CEOs. Practical, opinionated, grounded in real operator experience.

How to Leverage AI for Efficiency & Product Differentiation
60 min
How to Prepare for Technical Due Diligence & What Good Looks Like
60 min  ·  + 3 more sessions
See all talks
Deal Team Sessions

For Investors & Ops Partners

Targeted sessions for PE deal teams. From technology risk primers to closed-door portfolio benchmarking with senior partners.

Technology 101 & TechDD Primer for Deal Teams
90 min  ·  spot red flags early
Closed-Door Portfolio Benchmarking for PE Partners
90 min  ·  R&D spend, AI readiness
Learn more about Workshops and Talks

Ready when your deal is.

We mobilize fast, work at deal pace, and stay available until you close.