AssemblyAI vs Speechmatics

AssemblyAI9.0Visit Speechmatics8.8Visit

Higher score AssemblyAI #3 in Speech-to-Text Software 9.0/10 Paid ✓ 2 of 5 features Visit AssemblyAI

vs

Speechmatics #4 in Speech-to-Text Software 8.8/10 Free plan Free plan✓ 2 of 5 features Visit Speechmatics

• AssemblyAI fits best

  API builders needing rich speech intelligence

• Speechmatics fits best

  Teams needing deployment flexibility

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Side by side

Feature	AssemblyAI 9.0/10 Visit ↗	Speechmatics 8.8/10 Visit ↗
At a glance
Editor score	9.0	8.8
Ranking	#3 in Speech-to-Text Software	#4 in Speech-to-Text Software
Best for	API builders needing rich speech intelligence	Teams needing deployment flexibility
Pricing model	Paid	Free plan + paid
Starting price	$0.15/unit usage-based	$0.13 usage-based
Free plan	—	✓ (best)
Free trial	—	—
Deployment	Cloud, Self-hosted	Cloud, Self-hosted, Desktop
Platforms	Web	Web, Windows, macOS, Linux
Support	Email, Live chat, Community, Docs	Email, Tickets, Community, Docs
Compliance	SOC 2	SOC 2, ISO 27001, GDPR, HIPAA
Integrations	20 integrations	4 integrations
Built for	Small business, Mid-market, Enterprise	Solo, Small business, Mid-market, Enterprise
Features AssemblyAI 2/5 · Speechmatics 2/5
Speaker labels	✓	✓
API access	✓	✓
Offline transcription	Not checked yet	Not checked yet
Mobile apps	Not checked yet	Not checked yet
Desktop apps	Not checked yet	Not checked yet
Specs
Capture modes	Not checked yet	Not checked yet
Supported languages	99	Not checked yet
Our review
Pros	99 prerecorded transcription languages with Universal-2 Realtime WebSocket streaming plus diarization and word timestamps Translation, sentiment, entities, and key phrase analysis	Real-time and batch transcription with speaker diarization Cloud API, self-hosted, on-premises, and on-device deployment 55+ languages plus translation, summaries, and custom dictionaries
Cons	API-only platform with no listed non-API application Free transcription is capped at 185 prerecorded hours Pay-as-you-go pricing may require usage monitoring	Pro pricing is usage-based rather than a monthly-minute subscription Free plan supports two concurrent real-time sessions Enterprise pricing requires a custom quote
Our verdict	AssemblyAI provides APIs that convert prerecorded and streaming audio into text and structured speech data. It is designed for developers and organizations building voice applications, including meeting transcription, call analytics, AI… Read the review →	Speechmatics provides real-time and batch speech-to-text for enterprises, developers, and platform partners. It handles audio and video transcription, multilingual and code-switched speech, speaker and channel diarization, and word-level… Read the review →

Strengths and trade-offs

• AssemblyAI — where it wins

  • 99 prerecorded transcription languages with Universal-2
  • Realtime WebSocket streaming plus diarization and word timestamps
  • Translation, sentiment, entities, and key phrase analysis

  Where it doesn't

  • API-only platform with no listed non-API application
  • Free transcription is capped at 185 prerecorded hours
  • Pay-as-you-go pricing may require usage monitoring

• Speechmatics — where it wins

  • Real-time and batch transcription with speaker diarization
  • Cloud API, self-hosted, on-premises, and on-device deployment
  • 55+ languages plus translation, summaries, and custom dictionaries

  Where it doesn't

  • Pro pricing is usage-based rather than a monthly-minute subscription
  • Free plan supports two concurrent real-time sessions
  • Enterprise pricing requires a custom quote

• AssemblyAI9.0/10 · Paid

  A developer-focused API with transcription, streaming, and speech intelligence at $0.15/hour.

  Visit AssemblyAIFull verdict →
• Speechmatics8.8/10 · Free plan

  A flexible transcription platform for teams balancing cloud, on-premises, and on-device needs.

  Visit SpeechmaticsFull verdict →