Hume AI · Rate Limits

Hume Ai Rate Limits

Hume rate-limits primarily through plan-based monthly TTS character allowances, EVI minutes, and concurrent connection caps. Specific HTTP RPS limits are not publicly documented; Expression Measurement is gated by job throughput.

5 Limits Throttle: 429
AIVoiceEmpathicEmotionMultimodalRate LimitingQuotasThrottling

Limits

TTS Characters/Month (Free) account
characters
10000
~10 minutes of TTS audio.
EVI Minutes/Month (Free) account
minutes
5
Concurrent Connections (Free) account
concurrent_connections
1
EVI Minutes/Month (Business) account
minutes
12500
HTTP Requests account
requests
not publicly documented
Verify with Hume support; standard 429 backoff applies.

Policies

Backoff Strategy
Clients should implement exponential backoff with jitter and honor any Retry-After header.
Plan Sizing
Choose plan tier based on monthly TTS character and EVI minute usage projections.

Sources