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Historical Exchange Index

A quiet registry of crypto exchanges, active and gone.

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Exchange record

COSS

Singapore-based centralized exchange taken offline in January 2020 during a migration and acquisition process, followed by an announced relaunch plan whose durable completion and later operating continuity remain insufficiently verified.

CEXInactive

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Key facts

Launch date
2017-04-01
Death date
—
Years
2017–—
Origin
Singapore
Confidence
medium
Last verified
2026-06-25

URL handling

Preferred action
Use current URL handling based on status below.
URL status
Dead domain
Original URL
https://coss.io/
Archived URL
View archived site

Summary

Singapore-based centralized exchange taken offline in January 2020 during a migration and acquisition process, followed by an announced relaunch plan whose durable completion and later operating continuity remain insufficiently verified.

Timeline

COSS exchange was taken offline
2020-01-07trading_haltedhigh

The COSS team stated that the exchange was taken offline on January 7, 2020 during a migration process that was later interrupted by acquisition negotiations and technical audits.

Operations interrupted
2020-01-07service_outagehigh

COSS went offline and then entered an acquisition/relaunch process, leaving long-term status ambiguous.

Evidence

Archive index for the COSS official site
Internet Archive2026-04-08archive_capturemedium reliabilityurl_historyarchive
COSS relaunch and roadmap
COSS Team2020-03-03official_blogmedium reliabilitystatusarchive
Update: COSS exchange relaunch and roadmap
COSS Team—official_bloghigh reliabilityeventarchive
Archived COSS exchange domain
Internet Archive—archive_capturemedium reliabilityurl_historyarchive

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Notes and record state

Record note
COSS remains inactive rather than dead because the official team described acquisition negotiations and a relaunch plan after taking the exchange offline. No sufficiently strong terminal shutdown marker or verified sustained relaunch has been established in the reviewed evidence.
Revision state
Records may be incomplete, approximate, contested, or revised as better evidence becomes available.
This record may be incomplete or revised. Dead-side entries prefer archived URLs over original domains. Dates, causes, and classifications may change when stronger evidence becomes available. Contact / corrections

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