Neuphonic vs Smallest AI (2026): which should you pick?
As of Nov 12, 2026, Smallest AI grades higher than Neuphonic: 1.8 against 1.4 out of 4.0.
Checked Nov 12, 2026 · graded Nov 12, 2026 by ToolGPA
Smallest AI grades higher on the free plan. They get the same grade on value for money, features, ease of use and platforms.
Price, platforms and features side by side. The table says where each price was read and when.
Smallest AI
Voice AI models and agents: text to speech, speech to text, calls
Free trial
Which one is for you
Pick Neuphonic if
- Fits if speech has to run on your own hardware
- Makes sense if you want to inspect or adapt open speech models
Look elsewhere if
- Not for you if you need a price, because none is published
- Skip it if you want a finished app, as this is a developer product
- Watch out: the playground asks you to sign in to keep creating
- Too light for a buyer wanting plans or a free tier, since none is listed
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
| 1.4GPANeuphonicWeak | 1.8GPASmallest AIWeak | |
|---|---|---|
| Value for money | CNo public pricing was found on the site or in the docs, so we leave it at the middle and say plainly that nobody can check the cost. | 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 | FNothing free is listed. The playground lets you try a voice, then asks you to sign in to keep going. | 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 | COn-device and on-premises speech models for products with privacy needs. The job is narrow, one function. | 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 | DA developer product with docs and a contact form, no editor on record. Expect setup. | DNo store rating on record. It is a developer platform you call through an API. |
| Platforms and integrations | CWeb and a developer docs site. No integrations or apps listed. | CWeb and an API, with OpenAI listed. No apps. |
| Best for | speech models you run on your own hardware | 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: Neuphonic and Smallest AI. How we grade
Where they differ
- Neuphonic is open source, according to its own site.
- Smallest AI also covers transcription and AI agents.
In commonWebPublic APIText to speechVoice cloning
At a glance
| Neuphonic | Smallest AI | |
|---|---|---|
| Pricing | Paid | Free trial |
| Starts at | Not published | Not published |
| Free plan | None | None |
| Free trial | None listed | $10 in free credits with full access when you sign up for pay as you go. |
| Web | ||
| Made by | Neuphonic | Smallest AI |
| Price read from | Not confirmed | smallest.ai |
| Checked | Nov 12, 2026 | Nov 12, 2026 |
Worth knowing
Neuphonic
- No public pricing was found on the site or in the docs, so no plan or price is listed here.
- It is a developer product: the site routes enterprise use to a contact form.
- Trying a voice in the playground asks you to sign in to keep creating.
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
Neuphonic
- On-device and on-premises
- The site says models run locally, on-prem or at the edge, and describes CPU-native generation with no GPU needed.
- Multilingual speech
- The playground lists text to speech across 44 languages.
- Instant voice cloning
- Clones a voice from a short sample.
- Pronunciation control
- Markup for pauses and phoneme-level pronunciation can be placed in the text.
- Open models
- Open speech models and codecs are published on Hugging Face.
- API and playground
- A browser playground lets visitors try voices, and an API is documented at docs.neuphonic.com.
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
Neuphonic
Pricing could not be confirmed. See neuphonic.com.
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, Neuphonic or Smallest AI?
As of Nov 12, 2026, Neuphonic has no price we could confirm, and Smallest AI publishes no starting price.
Which has a free plan, Neuphonic or Smallest AI?
As of Nov 12, 2026, neither Neuphonic nor Smallest AI has a free plan. Smallest AI 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.