MasteringOnline vs TrackGleam

MasteringOnline has no write-up on Specifiction yet; its figures are above.

TrackGleam is a browser-based audio mastering tool with EQ, compression, saturation, stereo shaping, and true-peak limiting. It accepts WAV, MP3, FLAC, and M4A audio, as well as MP4, MOV, and WebM video, and processes the audio track in video files. Gleam Engine V5 uses a 14-stage chain and genre-aware presets, with optional linear-phase reference matching. GleamAI analyzes more than 60 measurements and offers five mastering directions: punch, warmth, space, energy, and transparency. Free and paid masters can be downloaded as WAV or MP3 without a watermark. Free Gleam includes unlimited mastering at no cost. Other options include a $1.99, paid once Single purchase, a $5 as a one-time purchase Creator Pack, and Producer subscriptions at $8.99 a month or $89.99 a year. With any purchase, GleamLab includes Mix Doctor and Music Visualizer without using mastering credits. Processing runs locally; AI mastering sends numeric measurements rather than audio. The optional lyric-finding feature sends a temporary mono audio copy to Groq for transcription. Producer unlimited use is restricted to music the subscriber creates, owns, or is authorized to master.