vioscaleAI
Comparison

Speechmatics vs whisper.cpp

On the evidence we track, Speechmatics leads this comparison with a composite score of 73/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

Speechmatics full profile →whisper.cpp full profile →
Machine formatsMarkdownJSONGraphQLMarkdown is open. JSON and GraphQL need a free key.
★Speechmatics73
whisper.cpp58
Score
vioscaleAI score
Speechmatics73 / 100medium · 54%
whisper.cpp58 / 100low · 34%
Pricing
Free tier
Speechmatics✓
whisper.cpp✓
Model
Speechmaticsfreemium
whisper.cppopen_source
Price level
Speechmaticslow
whisper.cppfree
Starting price
Speechmatics$0.01
whisper.cpp–
Transparent
Speechmatics✓
whisper.cpp✓
Integrations
Count
Speechmatics4
whisper.cpp–
Security
Certifications
SpeechmaticsSOC 2 Type II, ISO/IEC 27001:2022
whisper.cpp–
Disclosure policy
Speechmatics✓
whisper.cpp–
Gdpr
Speechmatics✓
whisper.cpp–
Hipaa
Speechmatics✓
whisper.cpp–
Iso27001
Speechmatics✓
whisper.cpp–
Scorecard
Speechmatics–
whisper.cpp5.1
Soc2
Speechmatics✓
whisper.cpp–
Trust center
Vulnerabilities
Adoption
Dependent repos
Speechmatics–
whisper.cpp18
Github stars
Speechmatics–
whisper.cpp54,417
Activity
Commits last 30d
Speechmatics–
whisper.cpp100
Release
Cadence days
Speechmatics–
whisper.cpp14
History
Speechmatics–
whisper.cpp20 items
License
Spdx
Speechmatics–
whisper.cppMIT
Language
Primary
Speechmatics–
whisper.cppC++
Market
Availability
Content
Faq
Speechmatics7 items
whisper.cpp5 items

Capabilities

Feature-by-feature on the axes that matter for speech to text. “-” means undocumented, not absent.

Capabilities
Real time streaming
Speechmatics✓
whisper.cpp-
Speaker diarization
Speechmatics✓
whisper.cpp-
Custom vocabulary
Speechmatics✓
whisper.cpp-
Fine tuning
Speechmatics✓
whisper.cpp-
Word timestamps
Speechmatics✓
whisper.cpp✓
Punctuation formatting
Speechmatics✓
whisper.cpp-
Pii redaction
Speechmatics✓
whisper.cpp-
Vertical model
Speechmatics✓
whisper.cpp-
Offline on device
Speechmatics✓
whisper.cpp✓
Open source
Speechmatics-
whisper.cpp✓

What each one is

The product in its own terms, so the numbers below have context.

Speechmatics

Leader

A speech-to-text service that converts audio to transcripts, supporting real-time and batch processing with high accuracy, speaker identification, and support for 55+ languages.

Independently observed

whisper.cpp

An open-source C/C++ implementation that brings OpenAI's Whisper speech recognition to local devices. It executes entirely offline without network connectivity and integrates into various hardware platforms from mobile to specialized computing systems.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

Speechmatics

Leader
from $0.01/charactersUsage-basedFree tier

From $0.12/hr for speech-to-text. Free tier with $100 credits.

  • Melia 1 (General purpose)$0.12/hr
    • 55+ languages
    • Code-switching
    • Language hints
    • Language labeling
    • Custom dictionary
    • +2 more
  • Enhanced$0.38/hr
    • Single-language maximum accuracy
    • Custom dictionary
    • Advanced punctuation
  • Medical (Oak 1)$0.15/hr
    • Clinical conversations and dictation
    • Healthcare vocabulary
    • 55+ languages
  • Standard$0.23/hr
    • High volume and cost-sensitive workloads
  • Linden 1 (Voice agents)Contact sales
  • Text to Speech$0.011 per 1,000 characters
    • First 1 million characters free
as of verify ↗

whisper.cpp

Open sourceFree tier
as of verify ↗

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platforms
Web
Speechmatics✓
whisper.cpp✗
iOS
Speechmatics✗
whisper.cpp✓
Linux
Speechmatics✗
whisper.cpp✓
CLI
Speechmatics✓
whisper.cpp✓
Deployment
Cloud / SaaS
Speechmatics✓
whisper.cpp✗
Self-hosted
Speechmatics✓
whisper.cpp✓
On-premise
Speechmatics✓
whisper.cpp✓
Hybrid
Speechmatics✓
whisper.cpp✗

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

Speechmatics

Leader
13 total
  • Stenograph CATalyst VP
  • Adobe Premiere
  • Zapier
  • Twilio
  • Python SDK
  • JavaScript SDK
  • .NET SDK
  • Stenograph
  • Adobe
  • Microsoft Azure
  • LiveKit
  • Vonage
  • Veritone
Independently observed

whisper.cpp

Not documented yet.

Still deciding?

Speechmatics or whisper.cpp: which one depends on you

A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.

Free to run, no account needed to start. How the evaluation works

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.