Senior technical leadership, without a full-time CTO.
A senior Gigabit engineer acts as your technical lead: architecture and roadmap decisions, AI strategy, code and vendor reviews, and the hiring bar, backed by a team that can build what gets decided. Technical due diligence before you invest, buy or raise, with a written report.
When a fractional CTO is the right call.
Many companies need senior technical judgment before they need a full-time CTO: a founder choosing an architecture, a CEO evaluating an agency's work, an investor checking a codebase before a round, or a team that has to decide what to do with AI. A fractional CTO gives you that judgment for the hours it takes, and someone accountable for the technical decisions in the meantime.
Gigabit does this differently from a solo advisor: the senior engineer who reviews or decides has a team behind them that can build, fix or migrate what the review finds. Due diligence is a written report with severity-ranked findings and a plan. The published logistics MVP shows the other side of diligence: its Series A investors audited the codebase and called it cleaner than most Series B companies they had seen.
What we take on.
Decisions, reviews and leadership, each ending in something written you can act on.
Technical due diligence
Code, architecture, security, infrastructure, team and cost reviewed before an investment, acquisition or major contract, with a written report.
Architecture and roadmap
The stack, the data model and the build order for the next twelve months, decided and written down.
AI strategy
Which workflows to automate, build-vs-buy decisions, model and vendor choices, and the evaluation plan.
Codebase and security reviews
An inherited or AI-built codebase checked for security, data model, performance and deploy risk.
Hiring and vendors
Role definitions, technical interviews and agency or vendor evaluations, so you hire and buy against a written bar.
Delivery oversight
Sprint reviews and code review for an in-house team or another vendor, with a senior engineer accountable.
How it runs.
Scope
Agree the decisions or the review needed and the written output.
Review
Read the code, systems and documents; interview the people who run them.
Report
Severity-ranked findings, the decision record and a costed plan.
Act
Your team acts on it, or ours builds, fixes or migrates what the report found.
Published prices, mapped to the job.
Every price here is the same one on the pricing page. Work with no published price gets a fixed price in writing before it starts.
Figures in the notes are what past clients paid, from the published case studies; they show the range, not a rate card. Work with no natural end, such as ongoing development, is priced per engineer per month with no lock-in.
When to hire us for this, and when not to.
- You are making technical decisions that will be expensive to reverse.
- An investor, buyer or customer will review the codebase.
- You inherited a system, or a vendor built it, and you need an honest read.
- You need senior judgment for some hours a month, not a full-time hire.
- Technology is your core product and you can hire a full-time CTO now. Do that.
- You want a rubber stamp on a decision already made. The report will say what it finds.
Technical decisions that held up under scrutiny.
A codebase investors audited before a Series A, and a migration planned from a written assessment.
A $48K, 11-week logistics SaaS MVP that reached 14 paying customers and unlocked a $2.1M Series A.
A 14-week strangler-fig migration off Heroku with zero downtime: -35% infra cost, -93% deploy time, +800% deploy frequency.
These are past engagements at the prices those clients paid. For build price, monthly cost and payback side by side, see what ten client projects cost.
Fractional CTO, answered
What does a fractional CTO do?
Makes and owns the senior technical decisions for a company that does not have, or does not yet need, a full-time CTO: architecture, roadmap, AI strategy, hiring, vendor choices and code quality. With Gigabit, the same engineer can call on a team to build what gets decided.
What does technical due diligence cover?
Code quality and maintainability, architecture and scalability, security and data handling, infrastructure and cost, test coverage and deploy process, third-party and licence risk, and the team. The output is a written report with severity-ranked findings and a costed plan.
How much does it cost?
Technical due diligence is quoted as a fixed price after a short scoping call, because it depends on the size of the codebase. A review of an AI-built app is the $2,500 Prototype Production Review. Ongoing technical leadership runs as part of an embedded team at $3,000–$7,500 per engineer per month.
Can you review a codebase another agency built?
Yes. That is one of the most common requests. We report what we find, including what was done well, so you can decide whether to continue with the agency, fix it, or move.
Do you sign an NDA?
Yes, before any code or documents are shared. Reviews run with read-only, time-limited access.
Often scoped alongside.
Prototype Production Review
A $2,500 senior review of an app built with Lovable, Bolt, Replit, Cursor or Claude Code.
Prototype Production ReviewAI strategy consulting
A two-week sprint that ends in a deployed pilot.
AI strategy consultingLegacy modernization
Old systems replaced piece by piece.
Legacy modernizationFrom the field notes
Facing a technical decision you can't undo?
Tell us the decision or the review you need. We reply with the scope, the written output and the price.