One rate across the whole catalog
Google charges $4 per million characters for Standard and WaveNet voices, $16 for Neural2, $30 for Chirp 3:HD, $60 for Instant Custom Voice, and $160 for Studio. Pick the wrong tier for a workload and the bill jumps four times in a billing cycle. SpeechifyAI is from $6 per million characters across the whole catalog, the same rate whether the script is a marketing voiceover, an IVR menu, an e-learning module, or an audiobook, with no SSML or whitespace counting against the rate.