Custom software, built around your business.
First Mate is a San Francisco-headquartered custom software development company. Our senior, product-minded engineers build web and SaaS products, AI features, internal tools, and custom ERP systems — led by Silicon Valley-trained leadership, delivered in phases, and priced at offshore rates. Every engagement starts with a two-week paid trial.
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What we build
Software that fits how you work — not the other way around.
Web & SaaS products
Customer-facing web apps and SaaS platforms, from first MVP to large production codebases — built to pivot as you learn.
Our services →AI & ML features
Search, recommendations, document AI, LLM features, and custom models — scoped, built, and verified by product-minded AI engineers.
AI engineering →Internal tools & custom ERP
Operations software shaped around how your business actually works: inventory, orders, scheduling, approvals, reporting — and the integrations that tie them together.
Custom ERP →Integrations & data pipelines
Connect the tools you already pay for — CRMs like Salesforce, payments, accounting, and data warehouses — so data flows without manual work.
Custom ERP vs. off-the-shelf ERP
Off-the-shelf ERP is great for standard processes. When your operations are what set you apart, custom often wins.
| Off-the-shelf ERP | Custom ERP | |
|---|---|---|
| Fit to your process | You adapt to the software's workflows | Built around your workflows |
| Time to launch | Fast for standard processes | Weeks to months, delivered in phases |
| Upfront cost | Lower (licenses + implementation) | Higher (build) |
| Ongoing cost | Per-seat licenses that grow with headcount | Hosting + maintenance; no per-seat fees |
| Differentiation | Same tools as competitors | Encodes what makes your operation unique |
| Best when | Your processes are standard (e.g. core accounting) | Off-the-shelf forces costly workarounds or spreadsheets |
Many teams combine both: a standard accounting system plus custom modules for the workflows that make them unique.
How we approach custom builds
Senior judgment first, code second.
Ruthless build-vs-buy judgment
We only build what's genuinely unique to you, and use proven managed services and off-the-shelf tools for the rest — so you don't pay to reinvent accounting or auth.
Our build-vs-buy framework →Ship in phases
Start with the workflow that costs you the most time or money, launch it, then expand. Value in weeks — not after a year-long big-bang project.
Built to change
Modular architecture keeps business logic separate from UI and isolates features, so new requirements don't mean rewrites.
Senior team, accountable leadership
Harvard-educated, Silicon Valley-trained leadership owns architecture and delivery; senior engineers in Manila build at offshore rates.
Custom software we've shipped
A few products built with our clients.
ALMA — Web App, AI/ML
ALMA's AI helps prepare legal documents. When ALMA struggled to hire a CTO, we built and launched its first product in three months.
ovice — Web App, Large Codebase
A Series B venture, ovice is crafting a next-gen virtual office platform. Within a month of our collaboration, impressed by our code quality, they doubled our project team size.
Acelab — AI/ML Research
Acelab is an integrated platform for building materials. We trained a neural network to significantly enhance their search feature.
Holly — Web App, GovTech
Holly is a purpose-built platform that helps public sector organizations recruit the workforce of tomorrow through AI-driven job design, compensation planning, and strategic insights. First Mate is trusted to build the first version of this product from end to end.
Planning a build? How to choose a software development partner →
Custom software development: FAQ
What is custom software development?
Custom software development is designing and building software for one organization's specific needs, instead of buying an off-the-shelf product. It includes customer-facing apps, internal tools, integrations, and systems like a custom ERP — and you own the result.
How much does custom software development cost?
It depends on scope and complexity. A focused MVP or single internal tool commonly lands in the tens of thousands of dollars, while larger platforms cost more. First Mate scopes every project individually and starts with a two-week paid trial.
Should I build a custom ERP or buy one?
Buy for standardized functions like core accounting, where off-the-shelf products are mature. Build custom when your operations are a competitive advantage, when you're stitching several SaaS tools together with spreadsheets, or when per-seat license costs grow faster than the value. Many companies do both: a standard accounting system plus custom modules integrated with it.
Can you build custom software if we have no technical team?
Yes — that's one of the most common ways clients work with us. First Mate's leadership acts as your technical team: we turn your business goals into a plan, make the architecture decisions, build and launch the software, and explain trade-offs in plain language. When ALMA couldn't hire a CTO, we built and launched its first product in three months.
How long does it take to build custom software?
A focused first version typically takes weeks to a few months. We deliver in phases — the highest-value workflow first — so you get working software early and shape the rest with real usage.
Do I own the code?
You should, with any vendor. Make sure the repository, cloud accounts, and IP are in your company's name from day one, and confirm it in your agreement before work starts.
Start your two-week trial.
No long-term commitment. Most engagements start with a low-risk trial. Prefer to talk first? Reach us directly.
