Methodology

The tracker covers companies officially selected for the NATO DIANA accelerator: the 2024, 2025 and 2026 cohorts and the Warfighters Challenge for Decision Superiority. It does not cover DIANA staff, mentors, accelerator-site operators, test centres or unsuccessful applicants.

The tracker currently holds 275 selection records across 30 countries and 19 challenge areas; 239 of them are publicly verified against an official announcement.

Every tracked company comes from an official NATO DIANA announcement. The primary sources are:

• DIANA 2024 cohort announcement (official PDF)
• DIANA 2025 cohort announcement (December 2024)
• DIANA 2026 cohort announcement (December 2025)
• Warfighters Challenge selection announcement (July 2026)

Where announcements disagree with later official pages, the most recent official source wins. Company websites are used only to fill optional profile fields (website, description) and are always labelled as such.

A record is marked "Verified against official DIANA announcements" when its name, cohort and challenge area match an official list. Records or fields that cannot be matched to a public source are labelled "Not publicly verified" rather than removed silently.

A company is counted once per selection. A business selected in two cohorts (one company in the dataset was selected for both the 2025 and 2026 cohorts) is one unique company but two selection records, and appears in both cohort lists. Headline company totals on this site are selection records; unique-company counts are labelled separately. All headline figures are computed from the 275 underlying records, not typed by hand, so tables and totals cannot drift apart.

Challenge-area counts: 3 in 2024, 5 in 2025, 10 in 2026, plus the Warfighters special challenge in 2026.

Selection rates are announced selected companies divided by published application figures (1,300+ in 2024, 2,600+ in 2025, 3,600+ in 2026, 427 for Warfighters). Because applicant figures are rounded minimums, published rates are approximate upper bounds.

A company's country is the country stated in, or verifiable from, official selection material, normally the country of incorporation or principal operations. Companies with teams in several countries are counted once, under their primary country. Where no country can be verified the field is left out rather than guessed.

The tracker uses the phrase "countries represented" rather than "allied nations" because the dataset includes non-NATO participants such as Israel and Switzerland.

Challenge-area names change between cohorts, so the tracker groups each verified challenge area into a small set of stable technology themes (autonomy, AI and data, sensing, cyber, space, energy, human and biotech, advanced materials). This is an editorial classification created by the tracker for comparison across years; it is always labelled "tracker classification" and official challenge-area names are shown alongside it.

Accelerator companies receive a €100,000 grant in Phase 1, with up to €300,000 in additional grant funding available in Phase 2 for outstanding performers. This is non-dilutive funding. Warfighters Challenge companies receive €100,000 in contractual funding, a different legal instrument from a grant, and profiles label it accordingly. Individual company amounts are not published by DIANA; profiles show the standard amount for their funding track and mark anything unverified as "Not publicly verified".

Phase 2 status is tracked only where DIANA has published it. DIANA has announced Phase 2 selections for two cohorts: 10 companies from the 2024 cohort (reported as an aggregate figure without a trackable list of names) and the 14 companies from the 2025 cohort announced in September 2025, which are individually tracked in the dataset.

The 2026 cohort was announced as 150 companies, but only 149 individual records can currently be verified from public sources; the remaining selectee is noted on the 2026 cohort page and will be added when a verifiable source appears. Applicant totals are rounded figures from announcements. Descriptions are paraphrased from public company material and may lag behind a company's current positioning.

The dataset is reviewed when DIANA publishes new information and on a rolling basis. Meaningful changes are recorded on the changelog with a date. Spotted an error? Report a correction or email info@alliancetechtracker.com with a link to the page and the correct information; verified corrections are applied promptly and noted on the changelog.

Alliance Tech Tracker is an independent, unofficial project. It is not affiliated with, endorsed by or funded by NATO or DIANA. Editorial decisions about classification, corrections and page structure are made by the tracker's maintainer against the rules on this page. Programme facts always link back to official DIANA sources so readers can check the primary material.

The full dataset is published openly on the data page so anyone can audit the figures on this site against the underlying records.