Top 5 Technical Due Diligence Firms for Software Acquisitions

A practical guide to choosing the right technical diligence partner before a software deal closes

The deal memo said the platform was modern, cloud-native, and well-architected.

The price reflected that.

Four months after close, the buyer found something different: a brittle deployment process, undocumented infrastructure, and one former contractor who had been the only person who understood how the system stayed online.

That kind of discovery is expensive after the acquisition. It is far cheaper before.

Technical due diligence exists for exactly this moment. It gives buyers an informed view of what they are acquiring beneath the product demo, customer list, and revenue curve. The work is not simply about finding bad code. It is about understanding whether the technology can support the investment thesis, what risks need to be priced into the deal, and what the first post-close priorities should be.

This guide looks at how to scope technical due diligence for a software acquisition, what a useful engagement should produce, and six firms worth considering depending on the kind of risk you need to investigate.

This is not a ranking. The right partner depends on the deal.

What technical due diligence should answer

A good technical diligence process does more than inspect a codebase.

It should help a buyer answer a few hard questions:

Can the platform scale with the business plan?

Is the architecture maintainable?

Are there security or compliance gaps that create exposure?

Does the company own the intellectual property it depends on?

How much technical debt exists, and what will it cost to address?

Will the current engineering team be able to keep shipping after the acquisition?

Those questions are business questions dressed in technical clothing. The answer may affect valuation, integration planning, the post-close budget, or the decision to walk away.

That is why a useful diligence report should connect technical findings to commercial consequences. “The system has technical debt” is not enough. A buyer needs to know whether that debt slows product delivery, increases infrastructure cost, creates hiring risk, complicates migration, or limits future growth.

The scope depends on the deal

Technical due diligence is not the same exercise every time.

A smaller software acquisition may require a deep review of a few core systems, direct repository access, cloud infrastructure review, and founder or engineering interviews. A larger platform acquisition may involve multiple products, distributed teams, compliance obligations, security controls, data architecture, and integration planning across departments.

The point is to match the diligence scope to the risk profile of the transaction.

Some deals call for a senior engineering team that can move quickly through messy repositories and undocumented infrastructure. Others need a multi-disciplinary review across security, compliance, product, architecture, and operations. Regulated sectors require a different lens than developer tools or vertical SaaS. A legacy platform with strong revenue requires a different review than a modern product with a thin engineering bench.

The mistake is treating technical diligence as a generic checklist.

The better approach is to start with the investment thesis. If growth depends on enterprise customers, security and scalability matter more. If the acquisition is about product integration, architecture and APIs deserve more attention. If the target’s value sits in proprietary technology, IP ownership and code provenance need serious review.

Six firms worth a call

Different firms are strong in different situations. The useful question is not “Who is best?” It is “Who is best suited to the risk in this deal?”

1. MEV: when findings need to connect to business consequences

MEV approaches technical due diligence as an engineering partner rather than a detached auditor.

The review typically covers architecture, scalability, code quality, infrastructure, and delivery processes. Its value is in translating those findings into cost, timeline, and operational impact. Instead of leaving buyers with a list of technical issues, MEV focuses on what those issues mean for growth, integration, product delivery, and remediation after close.

That makes it a strong fit when the buyer needs more than a pass-fail code review. It is especially useful when the target has a non-standard stack, legacy components, or a technology environment that does not fit a neat checklist.

The expected output is a scored assessment, a prioritized roadmap, and practical recommendations the buyer can use both before signing and during the first months after closing.

Best fit: buyers who need engineering findings translated into deal impact and post-close action.

2. Mad Devs: when code and infrastructure quality are the main concern

Mad Devs brings a hands-on engineering lens to technical diligence.

This is the kind of firm to consider when the buyer’s biggest concern is what lives inside the codebase: maintainability, technical debt, deployment practices, infrastructure design, and engineering workflow. Some diligence projects can be completed from interviews and documentation. Others need reviewers who are comfortable getting into repositories, CI/CD pipelines, and cloud environments.

Mad Devs is better suited to the latter.

It is a practical option when the acquisition depends on whether the product can be maintained, extended, and operated without major disruption.

Best fit: deals where code quality, infrastructure stability, and development practices are central to the risk assessment.

3. Techrivo: when the target operates in a regulated market

Some software acquisitions carry technical risk and regulatory risk at the same time.

Techrivo is relevant for deals in fintech, payments, financial services, and other compliance-heavy environments where architecture, security, data handling, and regulatory exposure all need to be reviewed together.

In these deals, technical diligence cannot stop at scalability or code quality. The buyer also needs to know whether the product’s controls, processes, and infrastructure can withstand the expectations of customers, regulators, auditors, and partners.

Best fit: acquisitions in regulated sectors where compliance and security posture can affect deal value.

4. Liberty Advisor Group: when technology risk needs business framing

Liberty Advisor Group combines IT diligence with broader business analysis.

That can be useful when the audience for the diligence report includes deal teams, operators, finance leaders, and technology leaders. Some firms produce reports that speak mainly to engineers. Liberty’s value is in helping technical findings land in business terms: cost, operational exposure, integration risk, and investment priorities.

This can matter in larger or more complex transactions where technology is one workstream among several, and where the final decision depends on how those workstreams fit together.

Best fit: buyers who need technical findings translated for both business and technology stakeholders.

5. Upsilon IT: when the target is early-stage or still maturing

Upsilon IT is a good fit for earlier-stage software companies or products where processes are still forming.

Its approach is more structured and checklist-driven, with attention to scalability limits, team practices, delivery process, and technical debt. That can be useful when the buyer needs to understand whether a promising product can support the next phase of growth.

Early-stage diligence often turns on practical questions. Is the architecture ready for more users? Are engineering practices disciplined enough? Is there documentation? Can new developers onboard without relying on tribal knowledge? Are the current shortcuts manageable, or will they slow the business later?

Best fit: acquisitions involving younger software products or engineering teams that are still developing mature processes.

What a useful diligence report should include

A technical diligence engagement should not end with a dense collection of engineering notes.

The report should help a buyer make a decision.

At minimum, it should include:

• An executive summary with the most important risks
• Severity ratings for each finding
• Evidence behind the conclusions
• A condition, cause, impact, and recommendation structure
• Cost and effort estimates for remediation
• A view of how findings affect valuation or post-close planning
• Immediate recommendations for the first 100 days

The best reports are useful twice.

First, they help the buyer decide whether to proceed, renegotiate, or walk away. Later, they become a working document for the technical team responsible for stabilizing, integrating, or improving the platform after close.

That second use matters. Diligence should not disappear into a data room once the deal closes.

How to get more value from the firm you hire

The quality of technical due diligence depends partly on the firm and partly on how the buyer manages the engagement.

Start with priorities. Tell the diligence team what matters most in the deal: scalability, security, product integration, cloud cost, IP ownership, engineering process, or regulatory exposure. A broad, unfocused scope produces broad, unfocused findings.

Give proper access. Repository access, infrastructure access, documentation, architecture diagrams, backlog history, incident history, and engineering interviews all matter. Without them, even a strong diligence team will be forced into surface-level observations.

Push for business translation. Every serious technical issue should be tied to a consequence. Does it affect valuation? Does it require immediate remediation? Does it increase hiring needs? Does it delay integration? Does it create customer risk?

Also ask the firm to separate deal-threatening risks from manageable ones. Not every issue deserves equal weight. Some findings require a post-close roadmap. Others should change the price. A few may change the decision.

Choosing the right diligence partner

No single firm is the right answer for every software acquisition.

Some deals need senior engineers who can inspect code and infrastructure quickly. Some need comparative benchmarks. Some need compliance depth. Some need business framing for a wider deal team. Some need help turning a messy technical environment into a practical post-close roadmap.

The best diligence partner is the one whose strengths match the risk in front of you.

That is the point of the exercise. Technical due diligence is not there to produce a perfect report. It is there to find the few facts that change the deal, the price, or the plan after close.

This is an adapted version of an article originally published on the MEV blog. If you’re scoping buy-side technical due diligence on a software target — particularly a non-standard or legacy stack — MEV runs engineering-led audits that tie technical findings to financial and operational impact, and can connect you with direct references from prior deals: MEV technical due diligence.