Yes, Deezer offers genuine lossless audio streaming. Through its HiFi and specialized high-tier subscription plans, Deezer provides music encoded in 16-bit / 44.1 kHz FLAC (Free Lossless Audio Codec) format. This ensures that audio streams deliver bit-for-bit uncompressed sound quality identical to original studio master recordings, contrasting sharply with standard lossy compressed formats like standard MP3 or AAC files.