This comparison is published by TonePerfect. Competitor facts were checked on 10 September 2026 against the vendor's public pages linked below; prices and features change, so confirm on their site before you decide. Where the other product is the better choice, we say so.
Where Speechace is the better choice
- English exam scoring. Speechace's Pro plan maps fluency to IELTS, CEFR, PTE and TOEIC rubrics and reports lexical stress, intonation, speaking rate and articulation. TonePerfect has no exam rubrics.
- Spontaneous speech. The Premium plan scores open-ended speech up to two minutes with transcription, vocabulary, grammar and coherence scores. TonePerfect is scripted only, 30 seconds maximum.
- Regional variants. Speechace offers English (US, UK), French (France, Canada) and Spanish (Spain, Mexico). TonePerfect has one variant per language.
- Free trial. Speechace plans include a free trial; TonePerfect accounts start with zero credits.
Where TonePerfect is the better choice
- Seven languages, including Mandarin, German, Italian and Portuguese. Speechace covers three languages. If your product teaches Mandarin, TonePerfect scores the initial, final and tone of every syllable.
- All features on every plan. Speechace gates fluency behind Pro ($80) and spontaneous speech behind Premium ($125). TonePerfect returns every dimension a language pack supports on the $10 plan.
- Lower cost at volume. Speechace's included requests cost $0.008 per 15-second request beyond the plan; TonePerfect's credits cost $0.003–0.004 with no per-plan feature gating.
- Decisions, not only scores. Each Mandarin component and each word in other languages carries a
review/uncertain/no_correctiondecision so your UI knows when a correction is warranted. - Audio is not retained. Recordings are deleted after scoring and never used for training.
Side by side
| Feature | Speechace | TonePerfect |
|---|---|---|
| Languages | English (US, UK), French (FR, CA), Spanish (ES, MX) | Mandarin Chinese (zh-CN), English (en-US), French (fr-FR), Spanish (es-419), German (de-DE), Italian (it-IT), Portuguese (pt-BR) |
| Scoring levels | Phoneme, syllable, word, sentence | Sound, word, sentence; Mandarin initial / final / tone |
| Fluency & prosody | Pro and Premium plans: fluency, lexical stress, intonation, speaking rate | Fluency and rhythm on English and French packs; no stress or intonation scores |
| Exam rubrics | IELTS, CEFR, PTE, TOEIC (Pro+) | None |
| Unscripted speech | Premium plan, up to 2 minutes | No |
| Audio length | 30 s (Basic), 45 s (Pro), 2 min (Premium) | Up to 30 s |
| Plans | Basic $40 / 5,000 requests; Pro $80 / 10,000; Premium $125 / 10,000 (monthly) | Starter $10 / 2,500 credits; Builder $50 / 15,000; Scale $150 / 50,000 (monthly) |
| Overage | $0.008 per 15-s request ($0.0125 on Premium) | Extra credit packs at $0.004, less 10% on Builder and 20% on Scale |
| Free trial | Yes | No free credits |
| Idempotent retries | Not documented | Yes — Idempotency-Key |
| Audio retention | See vendor policy | Deleted after scoring; never used for training |
What it costs at three volumes
| Monthly volume (recordings ≤ 15 s) | Speechace | TonePerfect |
|---|---|---|
| 1,000 | $40 — Basic (5,000 included) | $10 — Starter plan (2,500 credits included) |
| 10,000 | $80 — Basic $40 + 5,000 × $0.008, or Pro $80 (10,000 included) | $50 — Builder plan (15,000 credits included) |
| 100,000 | $800 — Pro $80 + 90,000 × $0.008 | $310 — Scale plan $150 (50,000 credits) + two 25,000-credit packs at $80 each (20% plan discount) |
Assumes recordings up to 15 seconds, Speechace list prices checked 10 September 2026, and no enterprise discount. Speechace's Premium tier is priced differently ($0.0125 per request) and is not needed for scripted scoring.
Integration differences
Both are REST APIs that take an audio file and reference text. Speechace exposes separate scoring endpoints per task (text score, speech score, and so on) and returns scores on a 0–100 scale with syllable and phoneme breakdowns. TonePerfect has a single POST /v1/assess endpoint whose response is identical in shape for all seven languages. If you build for English today and add Spanish or Mandarin later, nothing changes on the client.
Bottom line
Speechace is the stronger product for English test preparation and any feature that needs unscripted speech, exam rubrics or prosody detail. TonePerfect is the better fit for scripted speaking practice across several languages, for Mandarin, and for teams who want every feature on the entry plan with lower per-recording cost.
Sources checked 10 September 2026: Speechace API plans.