Rime vs Smallest AI (2026): which should you pick?
As of Nov 12, 2026, Rime grades higher than Smallest AI: 2.2 against 1.8 out of 4.0.
Checked Nov 12, 2026 · graded Nov 12, 2026 by ToolGPA
Rime grades higher on the free plan and platforms. They get the same grade on value for money, features and ease of use.
Price, platforms and features side by side. The table says where each price was read and when.
Rime
Voice models for phone agents: text to speech and speech to speech
Free plan · from $100/mo
Smallest AI
Voice AI models and agents: text to speech, speech to text, calls
Free trial
Which one is for you
Pick Rime if
- Fits if you build phone or call-center voice agents
- Makes sense if you want per-minute pricing with no monthly fee
Look elsewhere if
- Not for you if you want a text box for voiceovers, because this is built for agents
- Pricey if you want a plan, since Scale starts at $100 a month
- Watch out: custom voices, a HIPAA BAA and the SOC 2 report are Enterprise only
- Watch out: speech to text is listed as free only until Nov 19
Pick Smallest AI if
- Fits if you prototype voice agents and want to pay by use
- Makes sense if you want speech and speech to text from one vendor
Look elsewhere if
- Not for you if you want a flat monthly price, since there is none
- Tight if you test past the $10 credit, which is one-time
- Watch out: agents cost roughly $0.09 to $0.21 a minute plus a $0.01 a minute hosting fee
- Watch out: HIPAA zero data retention is a $1,000 a month add-on, and SSO and SOC 2 support are Enterprise only
How we grade them
| 2.2GPARimeFair | 1.8GPASmallest AIWeak | |
|---|---|---|
| Value for money | CFlex has no monthly fee: Mist v3 at $0.030 a minute, Coda v2 $0.050, Prism $0.080. Scale is $100 a month with rates 20% lower. The one paid plan is far above the category's middle. | CNo monthly fee. Lightning v3.1 is about $0.175 per 10,000 characters and Pulse $0.003 a minute, so the bill follows usage and there is no sticker price to rank. |
| Free plan and trial | B$50 of usage every month on all models, no card. For testing an agent that is a lot of minutes. | C$10 in free credits with full access, once. After that it is pay as you go, and whether a card is needed isn't stated. |
| Features | CSpeech, speech to speech and speech to text, with cloud, VPC and on-prem options on Enterprise. Custom voices and compliance reports sit there too. | CSpeech, speech to text and hosted agents, with enterprise on-premise. The limits include 15 concurrent TTS streams and a 450M-character monthly cap. |
| Ease of use | DNo store rating on record. It is an API for developers building agents. | DNo store rating on record. It is a developer platform you call through an API. |
| Platforms and integrations | BWeb and an API, with LiveKit, Pipecat and Twilio listed. | CWeb and an API, with OpenAI listed. No apps. |
| Best for | voice models for phone agents | usage-billed voice models and agents |
The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: Rime and Smallest AI. How we grade
Where they differ
In commonWebPublic APITranscriptionAI agentsText to speechVoice cloning
At a glance
| Rime | Smallest AI | |
|---|---|---|
| Pricing | Free plan | Free trial |
| Starts at | $100 per month, with $100 of usage credit | Not published |
| Free plan | $50 of usage every month, renewing monthly, across Prism, Mist v3, Coda v2 and Rime speech to text. No card required. | None |
| Free trial | None listed | $10 in free credits with full access when you sign up for pay as you go. |
| Web | ||
| Made by | Rime Labs | Smallest AI |
| Price read from | rime.ai | smallest.ai |
| Checked | Nov 12, 2026 | Nov 12, 2026 |
Worth knowing
Rime
- Flex has no monthly fee and bills usage by the minute: Mist v3 text to speech at $0.030, Coda v2 at $0.050 and Prism speech to speech at $0.080 a minute.
- Scale rates are 20% lower than Flex: $0.024 a minute for Mist v3, $0.040 for Coda v2 and $0.064 for Prism.
- Custom voices, a HIPAA BAA and the SOC 2 Type II report are limited to Enterprise.
- Rime's speech-to-text model is listed as free until Nov 19.
Smallest AI
- Pay as you go has no monthly fee: about $0.175 per 10,000 characters for Lightning v3.1 ($0.195 for Pro) and $0.003 a minute for Pulse.
- Voice agents cost roughly $0.09 to $0.21 a minute depending on the models chosen, plus a $0.01 a minute hosting fee.
- Pay-as-you-go limits include 15 concurrent TTS streams, 100 TTS requests per minute and a 450M characters monthly cap.
- HIPAA zero data retention is a $1,000 a month add-on, and SOC 2 compliance support and SSO are Enterprise only.
Key features
Rime
- Mist v3 text to speech
- Positioned as the lowest-latency model, with 78 voices in English, French, German and Spanish and a listed 37 ms median time to first audio.
- Coda v2 text to speech
- Positioned as the most natural model, with 313 voices across 10 languages including Japanese, Arabic and Hindi, and custom pronunciation lexicons.
- Prism speech to speech
- A model that hears the call, reasons over it and speaks; text is generated before audio so guardrails can check it, and it supports tool calls mid-call.
- Real-time streaming and telephony
- WebSocket streaming and 8 kHz phone audio are on every plan, with LiveKit, Pipecat and other agent-platform integrations.
- Custom voices and self-hosting
- Custom voice cloning and fine-tuning on your own calls are Enterprise features. The text-to-speech models can be self-hosted with Docker Compose or Kubernetes.
Smallest AI
- Lightning text to speech
- The Lightning v3.1 model lists sub-100 ms time to first audio, automatic switching between 14+ languages and 44.1 kHz output.
- Voice cloning
- The model page says a voice can be cloned from 5 seconds of audio; the pay-as-you-go comparison table lists voice cloning as not included and custom on Enterprise.
- Pulse speech to text
- Batch and real-time transcription with speaker identification, timestamps and sensitive-data protection, listed at a 5.42% word error rate.
- Hydra speech to speech
- A full-duplex speech-to-speech model that is in beta and available on request.
- Voice agents
- Build agents that run calls and campaigns, with a web widget, phone numbers at $10 a month and post-call analytics.
Plans
Rime
Free$0
$50 of usage each month on all models, no card required; email support and community docs.
Scale$100
per month, billed monthly to your card
$100 of credit a month that rolls over up to $200, with every rate 20% lower than Flex. Usage past the credit is billed at the same rates.
EnterpriseCustom
Volume rates billed annually, cloud, VPC or on-prem deployment, SLAs, custom voices, a HIPAA BAA and a SOC 2 Type II report. Sold through sales.
Smallest AI
EnterpriseCustom
Dedicated infrastructure, a 99.99% uptime SLA, forward deployed engineers, SSO, SOC 2 support, on-premise deployment and custom concurrency. Sold through sales.
Common questions
Which is cheaper, Rime or Smallest AI?
As of Nov 12, 2026, Rime starts at $100 per month, with $100 of usage credit, and Smallest AI publishes no starting price.
Which has a free plan, Rime or Smallest AI?
As of Nov 12, 2026, only Rime has a free plan. Smallest AI does not, though it has a free trial.
More comparisons
How this page was made
- The verdict at the top follows a fixed rule. When both tools are in the same category and either is in our top three for it, the verdict follows that ranking: the higher-placed tool is our pick. The top three weigh who each tool suits as well as its grades, so a pick can go against the GPA. Otherwise the page does not pick one and says which grades higher: the higher GPA first; on a tie, the one with a free plan, then the one that starts cheaper in dollars a month, counted the same way for both; if they are still level, what the choice depends on.
- The grades are our own, from each tool’s review or report card. The GPA is their average.
- Prices, plans and platforms come from each tool’s listing. The table above says where each price was read and when.
- The differences and the answers to the questions are worked out from those listings.