Inworld TTS
Realtime TTS-2 voice API from US-based Inworld AI, pay-as-you-go or monthly credit plans with lower per-character rates.
Every plan fee comes back as the same amount of credit, so the tiers mainly buy a lower per-character rate: Realtime TTS-2 falls from $25 per million on demand to $12.50 on Growth, and the Flash variant from $15 to $7. Unused credits roll over for up to 3 months. EU data residency, the DPA and BAAs are Enterprise-only, which makes it a better fit for US-hosted products than for European buyers.
- Headquarters
- 馃嚭馃嚫 United States
- Parent jurisdiction
- 馃嚭馃嚫 United States
- EU self-serve plan
- No / not documented
- GDPR DPA
- No / not documented
- Billing
- subscription
- Free tier
- On-Demand plan includes up to 70 minutes of TTS for evaluation.
- Open source
- No
- Website
- inworld.ai
- Source last checked
- 2026-10-06
- Pricing evidence
- Published rates
Pricing
Calculated from the listed vendor rates; exclusions still apply. How to read these estimates.
| Plan | Base fee / month | 1M additional characters |
|---|---|---|
| On-Demand | $0 | $25 |
| Creator | $25 | $20 |
| Builder | $100 | $17.5 |
| Developer | $300 | $15 |
| Growth | $1,500 | $12.5 |
Allowances, plan limits & calculation details
Rates are shown at their recorded precision. A zero means no charge in this calculation; the vendor may charge for things we leave out. See the notes for usage assumptions and currency conversions.
On-Demand
- Base fee / month
- $0
- Included characters / month (millions)
- 0
- 1M additional characters
- $25
Creator
- Base fee / month
- $25
- Included characters / month (millions)
- 1.25
- 1M additional characters
- $20
Builder
- Base fee / month
- $100
- Included characters / month (millions)
- 5.71
- 1M additional characters
- $17.5
Developer
- Base fee / month
- $300
- Included characters / month (millions)
- 20
- 1M additional characters
- $15
Growth
- Base fee / month
- $1,500
- Included characters / month (millions)
- 120
- 1M additional characters
- $12.5
Prices for Realtime TTS-2: $25 per million characters on demand, $20 Creator, $17.50 Builder, $15 Developer, $12.50 Growth, enterprise from $5. Each plan's fee comes back as the same amount of credit (included characters above = credit divided by the plan's TTS-2 rate); overage is charged at the plan rate. Realtime TTS-2 Flash is cheaper: $15/$10/$9/$8/$7 per million. Unused credits roll over up to 3 months; annual billing gives 2 months free. EU and India data residency, DPA, SLA and BAA are Enterprise-only. Inworld AI, Mountain View, California.
Managed alternatives
At 10M characters / month. Adjust usage and requirements.
Inworld TTS: $2,101/yr estimated.
- Kokoro-82M on DeepInfra: $74/yr estimated 路 $2,027/yr bill differencePublished rates
- Speechify API: $1,092/yr estimated 路 $1,009/yr bill differencePublished rates
- Murf API: $1,200/yr estimated 路 $901/yr bill differencePublished rates
- Azure AI Speech: $1,800/yr estimated 路 $301/yr bill differencePublished rates
- Fish Audio API: $1,800/yr estimated 路 $301/yr bill differencePublished rates
No cheaper managed estimate matches your filters. Adjust your usage or compare with your actual contract bill.
The price difference leaves out migration costs, operating costs and any features you鈥檇 need to replace.
Self-hosted options
Operating cost is not estimated. These options are not counted as savings against managed services.
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