Smallest.ai Atoms alternatives
Smallest.ai Atoms charges by usage. These 12 AI voice agent platforms are the closest matches on who they serve and how they work. Below the table, each one's main differences from Smallest.ai Atoms.
At a glance
- Lowest published starting price
- echowin, $10 a month
- Free plan
- ElevenLabs Agents (ElevenAgents), Bland AI, LiveKit and Phonely
- Signs a HIPAA BAA
- ElevenLabs Agents (ElevenAgents), Synthflow, Bland AI, Retell AI, Vapi, Deepgram Voice Agent API, LiveKit, Twilio ConversationRelay, Ultravox, Phonely and echowin
| Vendor | Charges by | Starts at | How it works | HIPAA BAA | Checked |
|---|---|---|---|---|---|
| Smallest.ai AtomsThis vendor | Usage-based | $0.01/min | AI only | Yes | Oct 2026 |
| Bolna | Usage-based | $0.06/min | AI only | Unconfirmed | Oct 2026 |
| ElevenLabs Agents (ElevenAgents) | Usage-based | Free tier | AI only | Yes | Oct 2026 |
| Synthflow | Usage-based | $2,500/mo | AI only | Yes | Oct 2026 |
| Bland AI | Usage-based | Free tier | AI only | Yes | Oct 2026 |
| Retell AI | Usage-based | $0.07/min | AI only | Yes | Oct 2026 |
| Vapi | Usage-based | $0.05/min | AI only | Yes | Oct 2026 |
| Deepgram Voice Agent API | Usage-based | $0.08/min | AI only | Yes | Oct 2026 |
| LiveKit | Usage-based | Free tier | AI only | Yes | Oct 2026 |
| Twilio ConversationRelay | Usage-based | $0.07/min | AI only | Yes | Oct 2026 |
| UltravoxAcquired | Usage-based | $0.05/min | AI only | Yes | Oct 2026 |
| Phonely | Per minute | Free tier | AI only | Yes | Oct 2026 |
| echowin | Per minute | $10/mo | AI only | Yes | Oct 2026 |
How each differs from Smallest.ai Atoms
- Bolna
- Lists $0.06 a minute to Smallest.ai Atoms's $0.01; doesn't say whether it signs a HIPAA BAA.In common: both name financial services, ecommerce, medical and 1 more industry they serve; both list Twilio.
- ElevenLabs Agents (ElevenAgents)
- Lists $0.08 a minute to Smallest.ai Atoms's $0.01; has a free plan.In common: both name financial services, medical, ecommerce and 1 more industry they serve; both list Twilio, Vonage, Telnyx and 1 more integration.
- Synthflow
- Charges by enterprise contract, starting at $30,000 a year.In common: both name medical, financial services and real estate among the industries they serve; both list Salesforce, Twilio, Telnyx and 1 more integration.
- Bland AI
- Lists $0.14 a minute to Smallest.ai Atoms's $0.01; has a free plan.In common: both name medical, financial services and hospitality among the industries they serve; both list Twilio and Salesforce.
- Retell AI
- Lists $0.07 a minute to Smallest.ai Atoms's $0.01.In common: both name medical, financial services and hospitality among the industries they serve; both list Salesforce, Twilio, Vonage and 1 more integration.
- Vapi
- Lists $0.05 a minute to Smallest.ai Atoms's $0.01.In common: both name medical among the industries they serve; both list Twilio, Telnyx, Vonage and 1 more integration.
- Deepgram Voice Agent API
- Lists $0.07 a minute to Smallest.ai Atoms's $0.01.In common: both list Twilio.
- LiveKit
- Has a free plan.In common: both list Twilio.
- Twilio ConversationRelay
- Lists $0.07 a minute to Smallest.ai Atoms's $0.01.
- Ultravox
- Lists $0.05 a minute to Smallest.ai Atoms's $0.01.In common: both list Twilio and Telnyx.
- Phonely
- Charges by the minute; has a free plan.In common: both name automotive, ecommerce, medical and 3 more industries they serve; both list Salesforce and Twilio.
- echowin
- Charges by the minute; lists $0.20 a minute to Smallest.ai Atoms's $0.01.In common: both name medical, real estate, automotive and 3 more industries they serve.
Each line comes from the two listings, which link their sources. Back to the Smallest.ai Atoms profile
Questions
What is the cheapest alternative to Smallest.ai Atoms?
Of the 12 alternatives here, echowin has the lowest published starting price, $10 a month, and ElevenLabs Agents (ElevenAgents), Bland AI, LiveKit and Phonely have a free plan. What a plan includes differs, so compare the limits on each profile.
Which Smallest.ai Atoms alternatives sign a HIPAA BAA?
ElevenLabs Agents (ElevenAgents), Synthflow, Bland AI, Retell AI, Vapi, Deepgram Voice Agent API, LiveKit, Twilio ConversationRelay, Ultravox, Phonely and echowin say they sign a business associate agreement. The others here don't say, or say they don't.