Hume AI vs Smallest AI: Features, Pricing and User Reviews 2026

Hume AI offers a free plan plus six paid tiers that scale with usage. The Free plan gives 10,000 text-to-speech characters and 5 minutes of speech-to-speech use each month at no cost.

• Starter ($3/month): 30,000 characters and 40 minutes of voice conversation.

• Creator ($7/month, 50% off the first month): 140,000 characters, 200 minutes, and a commercial license.

• Pro ($70/month): 1,000,000 characters and 1,200 minutes, with lower overage rates.

• Scale ($200/month): 3,300,000 characters, 5,000 minutes, plus team organization features.

• Business ($500/month): 10,000,000 characters, 12,500 minutes, and 5 team seats.

For large organizations, Enterprise offers custom usage limits, unlimited seats, Slack support, and compliance with SOC 2 Type II, GDPR, and HIPAA, available by contacting sales.

Smallest AI uses a pay as you go pricing model for its Agents and Models. New users start with $10 in free credits and only pay for what they use afterward.

Agent calls cost between $0.09 and $0.21 per minute depending on the model used, and text messages cost $0.005 each. Add-ons include Knowledge Base storage at $3 per GB per user, Knowledge Base queries at $2 per 1,000 queries, and PII removal at $0.01 per minute. Renting a phone number costs $10 per month.

For voice models, Lightning text to speech costs $0.175 per 10,000 characters, while Pulse speech to text starts around $0.003 per minute.

Larger teams can choose the Enterprise plan, which offers custom pricing, dedicated infrastructure, priority support, and compliance features, with agent calls priced as low as $0.05 per minute.