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We build digital products. For us. For you.

Our own SaaS products and software engineering that turn ideas into systems built for the real world.

Explore our productsBuild with us
Voynan / Product studio

2 SaaS products in production · 1 product in development · 1 open-source project in development

We do more than deliver software. We launch it, run it and evolve it. That experience shapes every project we build.

Our products

Products we build, operate, and continue to evolve.

2 SaaS products in production · 1 product in development

01 / SaaSCryptoVaultIn production

Protect files. Prove their integrity.

Authenticated encryption, integrity validation and verifiable records for files that cannot rely on trust alone.

Explore CryptoVault
  • AES-GCM encryption
  • Integrity validation
  • Verifiable blockchain record
Product home page
CryptoVault's home page: the product header above the headline “Your Files. Your Keys. Your Control.” and buttons to upload a first file or open the API documentation.
02 / SaaSBullLedgerIn production

Your investments, beyond spreadsheets.

Track assets across Brazil, the United States and Canada, generate reports and turn scattered data into clearer decisions.

Explore BullLedger
  • Investment tracking across three markets
  • Reports and insights
  • Organization of information for income tax reporting
Sample starting dashboard
BullLedger's Overview page: the product sidebar beside a portfolio summary with total value, nominal return and free cash, above a month-by-month line chart of demonstration data.
03 / SaaSConstrullyIn development

Every construction cost, under control.

Manage expenses, track taxes and generate reports with an up-to-date view of every construction project.

Explore Constrully
  • Expense management and tracking
  • Tracking of construction-related taxes
  • Operational and tax reports
Constrully icon: four stacked architectural chevrons in a silver-to-slate gradient.
ConstrullyComing soon

The experience of operating these products is the same experience we bring to every client project.

Build with us

The experience of running our products, applied to yours.

We build projects of every size—from focused automations to complex digital systems—with engineering designed to keep evolving after launch.

  1. Build

    • Web and mobile development

  2. Connect and automate

    • APIs, integrations, automation, and AI

  3. Operate with confidence

    • Cloud/DevOps, security, maintenance, and evolution

  4. Expand frontiers

    • Web3 and blockchain

Open source / Coming soon

File encryption, without the friction.

A library for encrypting and authenticating files of any format or size with AES-GCM, designed for straightforward implementation.

AEGIS

Founder

Kaio Vinícios

Founder and principal engineer

I started Voynan to build the products I wanted to use, and then to run them every day. Every system I hand to a client meets the same bar: it has to keep working when nobody is watching. That standard is what I bring to everyone who builds with us.

Portrait of Kaio Vinícios in a dark studio, wearing a black T-shirt, with dark hair and a short beard.

Let’s build something that keeps evolving.

The initial conversation is free. Most estimates are free as well. If your project requires a paid discovery phase, we will tell you before any commitment is made.

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contact@voynan.com