Legacy system holding you back
Old, undocumented software only one person can maintain.
Custom software
Custom software development when off-the-shelf won't fit
Some problems don't have a good product on the market. Some legacy systems can't be maintained anymore. We build custom software for those cases, with clear scope and increments you can test from week one.
What it is
Build or buy? The first deliverable is that answer
Custom software is built for a specific problem instead of adapted from a generic product. It makes sense when your process is a competitive advantage, when the rules are unusual, or when bending off-the-shelf tools has become more expensive than building.
It isn't always the right call, so we evaluate alternatives first: a well-configured product, an integration between existing tools, or a full build. Our article on custom software vs off-the-shelf lays out the criteria we use.
When building is the answer, we work with phased scope, prototypes before code, short delivery cycles and technical documentation.
Problems it solves
When custom software pays off
A process no product supports
Business rules that require expensive workarounds.
External access needed
Clients or partners need controlled access to orders, documents or data.
Benefits
What you get
Fits your process
Software that follows how you work.
No per-seat creep
Costs don't automatically grow with headcount.
Integrations without vendor limits
APIs, webhooks and files as needed.
A business asset
A documented system that evolves with you.
Want to know the cost and where to start?
Tell us in a few lines what you need. The assessment is free and we reply within 1 business day.
Use cases
Typical projects
Legacy modernization
Rebuild a desktop or legacy system as a web app, migrating data and rules.
B2B portal
Customers place orders and track deliveries online.
Field operations app
Mobile visits, photos and signatures with sync.
Pricing or rules engine
Logic that currently lives in fragile spreadsheets.
Internal AI tools
Document classification and smart search over company knowledge.
Product MVP
A first version to validate with real customers.
- 01
Discovery
Goals, users, rules, constraints and alternatives.
- 02
Spec and prototype
User stories, clickable screens, acceptance criteria.
- 03
Build in cycles
Short increments in a staging environment.
- 04
Go live
Migration, monitoring, docs and maintenance plan.
Integrations
Stack and integrations
- TypeScript
- Node.js
- React / Next.js
- PostgreSQL
- REST APIs
- Webhooks
- Background jobs
- LLM APIs
Why Exacta
Verifiable differentiators
Our own SaaS in production
We build and run multi-tenant products with per-tenant isolation and automated tests.
Honest recommendations
If a product fits better, we'll tell you.
Tests and documentation
Critical rules covered by automated tests.
Frequently asked questions
Frequently asked questions
Who owns the source code?
Ownership of code, hosting accounts and data is defined in the proposal. Custom projects commonly transfer code ownership to the client.
How do you control quality?
Acceptance criteria per feature, automated tests on critical rules and client sign-off before each release.
Can you work with us remotely from Brazil?
Yes. We work in UTC−3, which overlaps with US East Coast mornings and European afternoons. Decisions and specs are written down, and every increment is testable in the browser. We don't have offices outside Brazil.
Related services
Related services
Contact
Tell us about the software you need
If a system exists today, describe what it does and where it breaks.
- Reply within 1 business day
- No commitment
Start by evaluating your options
The assessment helps decide between buying, integrating and building.