ElevenLabs vs AssemblyAI: Full Speech AI Platform or STT Specialist?

Last updated Mar 17, 2026 • 3 minutes reading time

TL;DR

ElevenLabs and AssemblyAI approach speech AI from opposite sides. AssemblyAI is a premium speech-to-text platform (G2 Leader, 4.8/5 rating, 9.6/10 support score) with audio intelligence features like sentiment analysis, PII redaction, and LeMUR for speech summarization. ElevenLabs is the best-in-class text-to-speech platform (#1 in blind tests) with 14 products including voice cloning, dubbing, sound effects, and conversational AI. AssemblyAI does NOT offer TTS at all. ElevenLabs offers STT through Scribe. For teams needing both STT and TTS, ElevenLabs provides a single-vendor solution. For teams focused exclusively on transcription with audio intelligence, AssemblyAI is the specialist.

At-a-glance comparison

Text to Speech (#1 in blind tests)

Speech to Text (G2 Leader, best-in-class)

TTS

1,200+ voices, 70+ languages, professional cloning

NOT available (AssemblyAI has no TTS)

STT

Scribe v2 Realtime (<150ms latency)

Universal-2/3 models, 99 languages, industry-leading accuracy

Audio intelligence

Basic audio analysis

LeMUR (summarization), sentiment analysis, topic detection, PII redaction

Languages (STT)

Growing

99 languages across 4 quality tiers

API/DX

SDKs: Python, JS, React, Swift, Kotlin

SDKs: Python, JS, Go, Java, Ruby; G2 ease of setup 8.9/10

Pricing (STT)

Included in plans

$0.12-0.37/hr depending on model tier

Free tier

10,000 credits/mo

$50 free credits (~185 hours)

Scale

Enterprise with custom SLAs

10+ TB daily, 25M+ inference calls/day

Detailed comparison

Speech to text

AssemblyAI is a STT specialist. Universal-2 and Universal-3 models deliver industry-leading accuracy across 99 languages. The platform processes 10+ TB of voice data daily and handles 25M+ inference calls per day. G2 ranks AssemblyAI as a Leader with 4.8/5 rating and an exceptional 9.6/10 support quality score.

Beyond basic transcription, AssemblyAI offers Audio Intelligence: sentiment analysis, topic detection, PII redaction, entity detection, and LeMUR for AI-powered summarization and analysis of transcribed content. These features are valuable for compliance workflows, meeting analysis, and voice analytics.

ElevenLabs' Scribe v2 Realtime delivers <150ms latency with speaker diarization. Scribe is newer than AssemblyAI's offering but integrates directly with the rest of the ElevenLabs platform. For teams using ElevenLabs for TTS and wanting STT from the same vendor, Scribe eliminates the need for a second provider.

Bottom line: AssemblyAI is a premium STT provider with deeper audio intelligence features. ElevenLabs' Scribe is competitive for real-time use cases and offers a single-vendor advantage.

Text to speech

ElevenLabs is the TTS leader with 1,200+ voices, 70+ languages, and the lowest word error rate at 2.83%. AssemblyAI does not offer TTS at all. This is not a close comparison - AssemblyAI has zero TTS capability.

Bottom line: If you need TTS, ElevenLabs is the only option between the two.

Beyond speech-to-text: what else ElevenLabs offers

If your needs extend beyond STT and TTS, ElevenLabs is a broader audio AI platform. Alongside Scribe STT and industry-leading TTS, ElevenLabs offers Professional Voice Cloning, AI Dubbing across 29 languages, Sound Effects, AI Music, and Conversational AI for voice agents. These capabilities are outside the scope of this comparison but relevant for teams building products where transcription is one component of a larger audio workflow.

Who should choose ElevenLabs

Need TTS (AssemblyAI does not offer it)
Want a single vendor for STT and TTS
Are building applications that require both speech understanding and generation
Prefer a unified platform over multiple vendors

Who should choose AssemblyAI

Need the absolute best STT accuracy
Want audio intelligence features (sentiment, PII redaction, LeMUR)
Are building transcription pipelines, meeting analysis, or compliance workflows
Do not need TTS at all
Prefer a specialist STT vendor with exceptional developer support

FAQ

Does AssemblyAI have text-to-speech?

No. AssemblyAI is exclusively a speech-to-text platform. It does not offer TTS, voice cloning, dubbing, or any speech generation capability. For TTS, ElevenLabs is the industry leader with 1,200+ voices across 70+ languages.

Can I use ElevenLabs for speech-to-text?

Yes. ElevenLabs offers Scribe v2 Realtime with <150ms latency and speaker diarization. While AssemblyAI has a longer STT track record, Scribe provides a competitive option that integrates with the full ElevenLabs platform, enabling single-vendor workflows for both STT and TTS.

What is the best alternative to AssemblyAI?

For STT specifically: Deepgram (competitive accuracy, lower pricing), OpenAI Whisper (open-source, self-hostable), and Google Cloud Speech-to-Text (Google ecosystem). For a combined STT and TTS platform: ElevenLabs offers both through Scribe STT and industry-leading TTS. See our full guide: Top AssemblyAI Alternatives.