Pay As You Go

Simple, transparent pricing

No subscriptions. No commitments. Top up your balance and only pay for what you actually use. Add a payment method to unlock our generous free tier.

Speech Synthesis

Convert text to natural speech

  • Standard quality: £0.03/1k chars
  • High Fidelity quality: £0.05/1k chars
  • 57 languages supported
  • 9 unique AI voices
  • 5 output formats (MP3, AAC, OPUS, FLAC, WAV)
  • Sub-300ms latency
£0.03per 1,000 characters

True Forced Alignment

Your transcript in = your transcript out

  • Not ASR—deterministic acoustic alignment
  • Complete bundle: JSON, SRT & WebVTT included
  • Word-level & segment timestamps
  • 14 supported languages
  • Large file support (100MB)
  • Enterprise pricing available for bulk orders
£0.02per minute of audio

Transcription (ASR)

Convert audio to text with AI

  • Production-grade speech recognition
  • 99 languages supported
  • Auto-detect language
  • Segment-level timestamps
  • Large file support (100MB)
  • JSON & TXT output formats
  • Review transcript before linked alignment
£0.01per minute of audio

Translation

Neural translation, timestamp-aware

  • 57 target languages
  • Cue timestamps preserved verbatim
  • SRT, VTT, and JSON inputs supported
  • Register-faithful tone, included — no upgrade tier
  • Best for tonal content — anime, drama, dialogue
£0.08per 1k chars
Workflow Bundles

Stages chained, billed as one

Workflows orchestrate multiple services into a single bundled job with upfront pricing and refund-on-failure protection. All four workflows are live.

Subtitling

Live

Transcription ➔ Alignment ➔ Translation

Audio in, translated subtitles out. Single upfront charge per minute of source audio (1-min minimum). Auto-refunds on partial failure, or a run that stalls for 30 days.

£0.08

per minute of source audio

Dub-Prep

Live

Synthesis ➔ Alignment

Generate TTS audio and word-level alignment in one bundle. Estimated minutes derive from input character count (chars / 900) — no audio duration needed at submit time.

Standard

£0.04

per minute

High Fidelity

£0.05

per minute

More workflows

Subtitle Base · Quick Translate

  • Subtitle Base — Transcription + Alignment (no translation). £0.03 / min
  • Quick Translate — Transcription + Translation (no alignment). £0.06 / min

Free Tier Included

Every account gets a generous monthly free allowance. Perfect for testing and small projects. Free tier applies to Standard quality synthesis and alignment only.

10

min / month

Alignment

1,000

chars / month

Synthesis (Standard)

Transcription is pay-as-you-go only (no free tier)

Balance Top-Up

Top up when you need to

No auto-renewal, no surprise charges. You add money to your balance and usage is deducted from it in pounds — there are no tokens or points to convert.

£5

Popular

£10

£25

£50

£100

Secure payments via Stripe. Your balance never expires.

Enterprise & Bulk Pricing

Volume Discounts

Processing thousands of hours? We offer significant volume discounts for bulk alignment and synthesis jobs. Perfect for podcast networks, audiobook publishers, subtitle houses, and content platforms.

Custom volume pricing
Priority processing
Dedicated support
SLA guarantees

What's Included

Everything you need, nothing you don't

Full API Access

RESTful endpoints with comprehensive documentation

Unlimited API Keys

Create as many keys as your workflow needs

Unlimited Projects

Organize your work with no project limits

Persistent Storage

Files stored until you delete them

Email Support

Get help when you need it

Usage Dashboard

Track spending and usage in real-time

Included Voices

9 AI voices at no extra cost

All voices are included in your usage—no premium voice tiers.

alloy
ash
coral
echo
fable
onyx
nova
sage
shimmer

Languages

Global language support

57 languages for synthesis. 14 languages for alignment:

🇺🇸English (US)
🇬🇧English (UK)
🇫🇷French
🇩🇪German
🇪🇸Spanish
🇵🇹Portuguese (PT)
🇸🇪Swedish
🇨🇿Czech
🇵🇱Polish
🇹🇷Turkish
🇷🇺Russian
🇺🇦Ukrainian
🇯🇵Japanese
🇨🇳Mandarin (CN)

Output Formats

5 audio formats

Export in the format that fits your workflow.

mp3Universal compatibility
aacApple optimized
opusWeb streaming
flacLossless audio
wavRaw quality

FAQ

Common questions

Ready to get started?

Create your free account in seconds. Add a payment method to unlock the free tier.