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LOWER MID-MARKET VERTICAL SAAS & THEIR PE SPONSORS

The Technical Operating Partnerfor AI-Native Software Delivery

We provide technical air cover and operational leverage for deal teams, while installing AI-native engineering systems inside portfolio companies.

Portfolio teams accelerate roadmap delivery by 40% with existing headcount.
重鎖工學 合同會社 — 日本語に切り替えるJA

85%

Faster feature velocity in top engagements — six-to-eight-week projects shipped in days.

The agentic engineering shift

If your team's AI strategy is autocomplete and copying from ChatGPT — you're already years behind.

Tap your current stage

Your competitors aren't hiring more engineers. They're building more with fewer.

Book an AI Delivery Assessment

The Technical Valuation Gap

18–24

months behind.

That's how far behind the average lower-to-mid-market vertical SaaS team is on AI adoption — and competitors compound the advantage every quarter.

Closing that gap is what separates the teams that turn AI into revenue from the teams that watch it pass. Heavy Chain exists to close that gap — for the team itself, and for the funds backing them.

Structured Engagements

Four structured engagements from initial diagnosis to retained scale.

Start with the one-week Assessment to find the right project. Build it in the two-week Sprint. Keep the system current with the License. PE firms run the same discipline across the portfolio.

The flagship · build it

AI Delivery Modernization Sprint

A senior Heavy Chain engineer embeds with your team for two weeks. Together, we ship one funded production project using AI-native practices. We configure the workflow, install our tooling, establish automated test suites, enforce code review standards, and train your developers on live code. We measure delivery performance before and after the engagement to prove the efficiency gains. Two weeks covers standard projects; you can extend the engagement with additional sprints at $40K each.

$50K · two weeks

See the full offer

Currently embedded across a portfolio of lower middle-market vertical SaaS companies — for the operating teams and the funds backing them.

Click to read in detail →

Not sure where to start? On our first call, we map your current delivery bottlenecks and identify the highest-leverage project to tackle first.

Book an AI Delivery Assessment

The framework that ships with us

ETC — an agentic harness that keeps your agents in line.

Most AI tooling assumes the model is the bottleneck. It isn't. The bottleneck is what the model is allowed to do.

ETC is our agentic engineering harness. It standardizes how you specify requirements, structure codebase context, guide agent execution, and enforce quality gates. Install it once — the same disciplines govern your team"s work from then on.

Discipline > capability. The model is smart enough already.

Install ETC with your team
01

Specify before you build

Requirements are interrogated until they're buildable. Vague input never reaches implementation.

02

Test before you write

No production code ships without a test — enforced mechanically, no exceptions. Tests are the specification.

03

Decompose before you dispatch

Work is broken down until every piece is small enough to build and verify in one sitting. Nothing oversized reaches implementation.

04

Verify adversarially

Every shipped task is checked against the original spec before it counts as done. Approval is earned, not assumed.

05

Measure the outcome

Every feature states the outcome it exists to move — and gets measured against that claim, not against activity.

06

Defend in depth

When a bug escapes, the response is layered defenses, not a single patch. The same failure has to beat every layer to come back.

PORTFOLIO VALUE CREATION

How the Operating Partnership delivers portfolio leverage.

We serve as your technical operating partner across the entire investment lifecycle. We deliver pre-LOI triage and formal due diligence for deal teams, then provide interim technical leadership and delivery modernizations across your portfolio companies.

01

Assess

Before you submit a letter of intent (LOI), we triage technical risks. We rapidly review data-room materials, identify architectural hazards, and brief your investment committee.

02

Diligence

After you sign an LOI, we conduct comprehensive technical due diligence. We audit the codebase, evaluate architecture scalability and security risks, assess engineering leadership, and deliver a clear written report to the investment committee.

03

Blueprint

We build a 100-day value creation plan for Day One. We collaborate directly with the portfolio company CEO, CTO, and board to establish architectural governance, measure delivery baselines, and rank execution priorities.

04

Modernize

We embed inside portfolio companies to modernize live codebases. We install structured planning, agentic workflows, and automated quality gates so existing teams accelerate roadmap delivery by 40%.

05

Scale

We maintain a retained technical partnership at the fund level. We institute standardized internal AI toolchains across PortCos and establish unified portfolio reporting, giving GPs consistent visibility into engineering velocity and delivery risk across all assets.

Operating Partner Structure

Retained at the fund level ($15K/month) · Transaction diligence & PortCo modernizations scoped to demand.

Fund Retainer: $15,000 / month · PortCo Sprints: $15,000 / month or per-project.We maintain a strict boundary between standing advisory governance and hands-on engineering work.Discuss Portfolio Value Creation

Run the numbers

What development capacity does the Modernization Sprint free up?

Set your team's numbers. The assumptions are conservative, and every one of them is yours to change.

Your scenario

1500
10

Include salary, benefits, taxes, tools, equipment, facilities, and management overhead where applicable.

$50K$500K
150,000
5%85%
25
Scenario

Estimated additional annual development capacity

$375,000

2.5 engineers

Equivalent capacity, not a headcount recommendation.

Sprint investment$50,000
Capacity-value payback35 workdays
First-year capacity ROI650%

This compares estimated additional annual engineering capacity with the sprint fee. It is not a revenue forecast.

Discuss this scenario
How this is calculated

Team size × loaded annual cost × estimated improvement

10 × $150,000 × 25% = $375,000

  • The result represents development capacity, not cash savings.
  • It does not assume layoffs, and it does not guarantee realized revenue.
  • Actual improvement depends on the team, codebase, management support, project choice, and adoption.
  • The sprint fee is included in the first-year ROI calculation.

This calculator estimates the value of additional engineering capacity. It does not assume headcount reduction, and it is not a revenue forecast. Heavy Chain engagements begin with a real production project, establish a baseline, and measure the result against that baseline.

What leaders report back

What happens after the shift

Results from teams that crossed to the other side.

From the blog

What I'm seeing in the shift

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Investment Diligence & Portfolio Engagements

Book an Investment Diligence Call

We provide direct technical due diligence for private equity deal teams and high-velocity engineering modernization for vertical SaaS portfolio companies. Tell us about your transaction timeline or portfolio mandate.

Response time

Within 1–2 business days

Who it's for

Private equity managing directors, deal teams, investment committees, and portfolio company executives.

How to reach us

Direct response from Jason Vertrees, PhD (Technical Operating Partner) within 1 business day under full confidentiality / NDA.