AssemblyAI vs ElevenLabs
Side-by-side comparison of features, pricing, and ratings
AssemblyAI or ElevenLabs: which should you choose?
| Dimension | AssemblyAI | ElevenLabs |
|---|---|---|
| Best for | Speech-to-text APIs and voice agents for developers | Ultra-realistic TTS, dubbing, music, and voice agents |
| Key differentiator | High-accuracy STT with real-time Context Carryover | Expressive voice generation + creative audio tools |
| Languages | 99 for STT (Universal-2), 18 for Universal-3.5 Pro | 70+ for TTS |
| Approach | Developer-first speech understanding platform | Broad: voice, music, SFX, dubbing, agents |
| Integration spotlight | Pipecat, ElevenLabs, LiveKit, LLMs | Twilio, WhatsApp, Salesforce, Meta |
If you need lifelike voice generation for content or voice agents, ElevenLabs is the pick — it excels at TTS, dubbing, and audio creation. If your core need is accurate speech-to-text and building voice AI products, AssemblyAI's APIs are what you want — especially with Universal-3.5 Pro's human-parity accuracy. Choose based on your primary input (text-to-speech vs. speech-to-text) and whether you prefer a broad creative suite or a focused developer platform.
AssemblyAI speech-to-text API: batch, realtime streaming, and voice agent builds behind one key.
Visit WebsiteAI voice platform for text to speech, cloning, dubbing and conversational agents — now with music, SFX and generated video.
Visit WebsiteWho should pick AssemblyAI, and who should pick ElevenLabs?
- Content creator (podcast/audiobook)Pick: ElevenLabs
Lifelike TTS in 70+ languages, voice cloning, and expressive controls are built for audio production.
- Developer building a voice agentPick: AssemblyAI
Voice Agent API with built-in turn detection, telephony integration, and HTTP Tool Calling makes deployment straightforward.
- Enterprise doing customer support automationPick: ElevenLabs
Omnichannel agents (phone, WhatsApp, email) and integrations with Twilio/Salesforce suit large-scale deployments.
- AI scribe / notetaker startupPick: AssemblyAI
Real-time stream with Context Carryover and human-parity accuracy on Coval benchmark ensures reliable meeting transcription.
- Indie game developerPick: ElevenLabs
Expressive character voices and a huge voice library — plus music/SFX generation — cover audio assets in one place.
Frequently Asked Questions
AssemblyAI vs ElevenLabs: which should you choose?
If you need lifelike voice generation for content or voice agents, ElevenLabs is the pick — it excels at TTS, dubbing, and audio creation. If your core need is accurate speech-to-text and building voice AI products, AssemblyAI's APIs are what you want — especially with Universal-3.5 Pro's human-parity accuracy. Choose based on your primary input (text-to-speech vs. speech-to-text) and whether you prefer a broad creative suite or a focused developer platform.
Which has better accuracy for speech-to-text?
AssemblyAI's Universal-3.5 Pro Realtime is the only model in Coval's Human Parity Zone, so it leads on accuracy benchmarks. ElevenLabs' Scribe is decent (98%) but not positioned as a research-grade STT.
Can both handle real-time audio?
Yes. ElevenLabs offers low-latency TTS (Flash ~75ms) for voice agents; AssemblyAI offers real-time streaming STT with Context Carryover for live transcription.
Which is better for creating music and sound effects?
ElevenLabs — it has dedicated music generation, SFX, and even video generation via Veo/Wan/Kling, which AssemblyAI doesn't offer.
Do they support multiple languages?
ElevenLabs TTS supports 70+ languages; AssemblyAI STT supports 99 languages (Universal-2) and 18 for the highest-accuracy Pro model. Your choice depends on input vs. output language needs.
Can I use both in a single product?
Absolutely — AssemblyAI even lists ElevenLabs as a TTS integration for its Voice Agent API. Many teams pair AssemblyAI for STT and ElevenLabs for TTS.
Which offers watermarking for AI-generated audio?
ElevenLabs uses Google's SynthID for detection and watermarking — a feature AssemblyAI doesn't advertise.
What else are AssemblyAI and ElevenLabs compared with?
These overlap on dubbing and voiceover but solve different problems, so the choice is driven by whether you're cutting video or generating speech. If your week is spent turning interviews and webinars
These are only loosely competitors: Speechify is a consumer reading-and-dictation assistant you open next to a PDF or email, while ElevenLabs is an audio production platform you embed in a product or
If your end product is a video — ads, training, social clips — HeyGen is the clear pick, with Avatar V leading the pack. If your end product is audio or an interactive voice agent — audiobooks, dubbin
Choose Bland AI if your calls live in a regulated environment (healthcare, finance) and you need ironclad compliance and sub-400ms real-time interaction. Pick ElevenLabs if your priority is hyper-real
Where can you read more about AssemblyAI and ElevenLabs?
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