Since your question is general and not specific here on Bitcointalk, please check out.

Escrow.com is the oldest escrow company online. You must contact them for Bitcoin transactions; some articles recommend them for Bitcoin transactions.

guaranty-escrow.com They accept crypto transactions and claim to have protected over $6 billion in transactions

cryptoexchange.com = They have an escrow service for Crypto transactions

These are community-recommended, but I have not tried their service, so do your due diligence too