Independent software company · Est. 2026
Careful software for markets, learning, and family.
Portianka LLC designs, builds, and runs a small family of products — each one made to be useful, honest, and durable.
01 Products
-
Quantour
Data & compute API
Quantitative research infrastructure for developers, traders, and funds. We sell data and compute — never signals, never advice.
quantourapi.com -
Dmytrivna
Tutor marketplace
A lean tutor marketplace — discovery, booking, and Google Calendar invites. Payments settle directly between teacher and student; the platform takes no cut.
dmytrivna.org -
Kotskiy
Family-safe messaging
A family-safe way for kids to use Telegram — only parent-approved contacts can reach them, and no one reads their messages. Not even us.
pankotskiy.org
02 Company
Portianka LLC is an independent, founder-led software company based in Concord, Massachusetts. We design and operate our own products in-house, keep the stack small, and let each product stand on its own.
The approach is the same across all three: no data brokers, no dark patterns, no surveillance — software that earns its place.
Contact — [email protected]