Comparison

FreezeRadar vs BlockSec MetaSleuth / USDT Blacklist Checker

BlockSec is primarily a smart-contract security and fund-tracing company (MetaSleuth) that also ships a free USDT blacklist checker limited to Ethereum and TRON. It has a genuinely strong visual fund-flow graph. FreezeRadar covers more chains and assets and adds a weighted risk score, but doesn't yet have BlockSec's level of graph visualization.

Check a wallet free Visit BlockSec MetaSleuth / USDT Blacklist Checker

Feature by feature

Feature	FreezeRadar	BlockSec MetaSleuth / USDT Blacklist Checker
Chains covered	9 freezeable-asset chains (ethereum, tron, bsc, polygon, solana, base, arbitrum, optimism, avalanche) plus Bitcoin for sanctions-only screening	Ethereum, TRON (USDT only)
Freezeable assets	11 freezeable assets (USDT, USDC, PAXG, XAUt, PYUSD, USDP, BUSD, EURC, RLUSD, TUSD, FDUSD) across 26 tracked contracts	USDT only
Freeze/unfreeze/burn events	Freeze, unfreeze, and burn — all three tracked	Freeze, removeBlackList (unfreeze), and destroyBlackFunds (burn), all tracked
Visual fund-flow graph	Yes — provenance graph on deep scans	Yes — MetaSleuth, a mature, widely used graph tool
Finding types / risk signals	40 distinct finding types	Blacklist status only, no weighted scoring layer
Sanctions sources	5 official sources (OFAC, UK, UN, EU, NBCTF)	OFAC
Pricing	5 free scans/day, paid plans for more	Free blacklist checker; MetaSleuth and the security suite are separate paid products

Where FreezeRadar is better

9 chains and 11 freezeable assets to their 2 chains and 1 asset (USDT-only).
A 5-source sanctions check and a weighted risk score, where their free checker reports blacklist status alone.
40 finding types covering behavioral patterns, not just current blacklist state.

Where BlockSec MetaSleuth / USDT Blacklist Checker is better

MetaSleuth's fund-flow graph is a genuinely mature, widely used visualization tool — ours is newer and less refined.
BlockSec is a well-established name in smart-contract security more broadly, which carries trust for enterprise buyers evaluating a vendor.

Which should I use?

If you specifically need deep, polished fund-flow graph visualization and only care about USDT on Ethereum or TRON, BlockSec's free checker plus MetaSleuth is a strong combination. If you need broader chain and asset coverage with a risk score attached, use FreezeRadar.

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FAQ

Common questions

Is BlockSec's USDT checker free?

Yes, their basic blacklist checker is free. MetaSleuth and their broader security suite are separate, paid products.

Does BlockSec cover USDC or other stablecoins?

Their free blacklist checker is USDT-only on Ethereum and TRON. FreezeRadar covers 11 freezeable assets across 9 chains.

Reviewed 2026-08-07 — BlockSec MetaSleuth / USDT Blacklist Checker information is drawn from their public site and reviewed quarterly. Something changed? Let us know.