The open international competitions that pass a single rule: €0 entry, confirmed on each one's official page — never on the aggregator. The platforms that live off entry fees — Buildner/Bee Breeders, UNI, Volume Zero, eVolo — stay out, with the measured fees and the source in view, further down.
Deadlines, prizes and eligibility were checked one by one on 3 September 2026. The days remaining count from the date this page opens; when a deadline passes, the card gets marked. Before submitting, always confirm the rules on the official site — deadlines change.
They call them ideas competitions; the product is the entry. The platforms below organise competitions on briefs and sites nobody will build, and charge each entrant — the business pays for itself on the volume of entrants. It is not illegal; it is a business model. It is just not what this radar publishes.
| Platform | Measured fee (2026) | Source |
|---|---|---|
| Buildner / Bee Breeders | €120 for the advanced registration (architect) at the Vancouver Tall Challenge 2026 — an ideas competition organised with the City of Vancouver and UBC SALA: the partners are institutional, the fee is the platform's. | architecturecompetitions.com ↗ |
| UNI (uni.xyz) | memberships from $9/week to $69/semester; individual entries per competition between $55 and $92, plus a 7.5% payment fee. | uni.xyz ↗ |
| Volume Zero | $70–95 per team at Unbox 2026 (the competitions.archi directory advertised it as “FREE registration”). | volumezerocompetitions.com ↗ |
| eVolo | $95 (early registration) to $135 at the Skyscraper Competition. | evolo.us ↗ |
This is a photograph taken on 3 September 2026, not a real-time service: the cards sort by deadline and the day count runs in your browser. Re-verification runs over the same official sources when the current deadlines expire.
Out of scope: built-work awards, drawing or essay competitions, and the Portuguese public competitions — those have their own radar, the meta-concurso, which reads 705 competitions from the Ordem dos Arquitectos platform, document by document. The competitions on this page are international and open to anyone in Portugal.