Two readings, side by side
Extended vs Ostium
Not a scoring table. Two dated readings of the venues' own restriction pages, the countries where their lists differ, and each programme's declared terms — quoted, never improved.
The readings behind this page
- Extended — read on 2026-08-30 docs.extended.exchange #54201cfd Full Extended list
- Ostium — read on 2026-08-31 docs.ostium.com #585a5727 Full Ostium list
What each one charges
- Extended — taker 0.025%, maker 0.000%, read 2026-09-03 flat docs.extended.exchange
- Ostium — opening fee 3–10 bps, read 2026-09-03 varies by asset docs.ostium.com
The gap between venues is usually larger than any referral discount: count that first.
Named by Extended, not by Ostium
- AF Afghanistan
- CA Canada
- CN China
- HK Hong Kong
- RU Russia
- SC Seychelles
Named by Ostium, not by Extended
- AT Austria
- BE Belgium
- BG Bulgaria
- CY Cyprus
- CZ Czechia
- DE Germany
- DK Denmark
- EE Estonia
- ES Spain
- FI Finland
- FR France
- GR Greece
- HR Croatia
- HU Hungary
- IE Ireland
- IT Italy
- LT Lithuania
- LU Luxembourg
- LV Latvia
- MT Malta
- NL Netherlands
- PH Philippines
- PL Poland
- PT Portugal
- RO Romania
- SE Sweden
- SI Slovenia
- SK Slovakia
Named by both
- CU Cuba
- GB United Kingdom (UK)
- IR Iran
- KP North Korea
- SY Syria
- US United States
If the edge can place your connection, your country's code is marked in the lists above.
What each programme declares
Extended
AIRDROPRADAR You get 10% off Extended's commissions for your first $50M of volume — against a taker fee of 0.025% and a maker fee of 0.000%, read on their own docs 3 Sep 2026. We are paid in platform points, not cash. The fee-rebate affiliate programme is invite-only and we are not in it.
Ostium
M810X Ostium's opening fee is 3–10 bps depending on the asset, read on their own docs 3 Sep 2026. We record no invitee discount for their programme. We are paid a referral commission. The restricted-country list is still Ostium's; payment does not rewrite it.
Questions
Which can I use from my country — Extended or Ostium?
The venues decide that, at KYC. What we publish is a different thing: whose list names which countries — yours marked when the connection can be placed — and the click is checked at the edge either way.
Do Extended and Ostium pay the same referral reward?
Each declares its own programme; both are quoted above verbatim and checked monthly. We add nothing to either.
Why do the two lists differ?
Different legal exposure, different regulators, different lawyers. We do not guess at reasons — we date what each page says and record every later change in the ledger.