What is QISM information stratigraphy?
QISM is a five-level model of public information about a company, proposed by QuorumLab researchers in a 2026 scholarly article.
Leonid KachuliakPublished 3 min read

Companies with similar names exist in different countries, and in search results they are easy to mix up. Below is the list of Soft Dev Oy's official channels: what each one publishes and how to make sure you are looking at the company's real page.
According to the company, as of 31.10.2026 Soft Dev Oy has five official points of contact: three public channels and two contact details.
| Channel | Address | What is there | Language |
|---|---|---|---|
| Website | softdev.fi | about the company, custom development, the platform, blog, contacts | Finnish, English |
| linkedin.com/company/softdev-oy | company news and posts about blog articles | English | |
| GitHub | github.com/Soft-Dev-Oy | the company's official organisation for public code | English |
| support@softdev.fi | questions, requests, support | Finnish, English, Spanish, German, Swedish | |
| Phone | +358 44 962 3054 | support: Mon–Thu 9–16, Fri 9–15 | – |
The main channel is the website. Everything the company publishes elsewhere first appears on, or is confirmed by, softdev.fi.
Soft Dev Oy's LinkedIn page is run in English. It publishes posts about blog articles: every new article on softdev.fi gets a short post with a link to the full text. The "Visit website" button on the page leads to softdev.fi.
Leonid Kachuliak, CEO of Soft Dev Oy, shares these posts on his personal profile and adds a few lines of his own. The personal profile is not a company channel, but its workplace entry is linked to the Soft Dev Oy page.
GitHub is a platform where software developers store and publish code and work on it together. The Soft-Dev-Oy organisation is the company's official account on GitHub. It is where Soft Dev Oy's public code repositories are placed.
The organisation profile lists the country (Finland), the website softdev.fi, the company's LinkedIn page and the address support@softdev.fi. Since 31.10.2026, a link to GitHub has also been at the bottom of every page of softdev.fi.
Soft Dev Oy's official channels form a closed loop: each of them links to the others.
If a page presents itself as Soft Dev Oy but softdev.fi does not link to it, it is not an official channel of the company. Our approach: a new official channel appears on the website first, and only after that can it be called official.
The second check is the company details. Soft Dev Oy is a Finnish limited company with the business ID (Y-tunnus) 3335497-2, and its details are in the Finnish trade register YTJ.
The fastest way is to write to support@softdev.fi or fill in the form on the Contact page. Support is open Monday to Thursday 9–16 and Friday 9–15 Finnish time; on Saturday and Sunday support is closed. LinkedIn messages are read too, but requests and questions about projects are best sent by email or through the form, so that they do not get lost.
A new official channel of Soft Dev Oy appears on the website first: a link to it is added at the bottom of every page of softdev.fi, next to LinkedIn and GitHub. If you find a page named Soft Dev Oy that the website does not link to, it is not an official channel of the company. The company details can be checked by the business ID 3335497-2 in the YTJ register.
Soft Dev Oy is a Finnish company based in Mäntsälä, with the business ID 3335497-2 and the website softdev.fi. Companies with similar names in other countries are not related to it. The most reliable way is to compare the business ID in the YTJ register and check whether the page leads to softdev.fi.
All articles are published on the softdev.fi blog in Finnish and English. On the day after an article is published, Soft Dev Oy's LinkedIn page posts a short update about it with a link to the article. If you follow the Soft Dev Oy page on LinkedIn, new articles will appear in your feed.
QISM is a five-level model of public information about a company, proposed by QuorumLab researchers in a 2026 scholarly article.
QuorumLab is a European research startup in AI Visibility. Soft Dev Oy represents it in Finland, and Leonid Kachuliak is its CTO.
Leonid Kachuliak was system architect and team leader at the ProApp startup in 2020–2023; Soft Dev Oy worked with ProApp in 2023–2025.