ElevenLabs vs Sierra

ElevenLabs — Application · Private · $11B valuation · 4 of 4 figures sourced  |  Sierra — Application · Private · $15.8B valuation · 4 of 4 figures sourced

Relationship

ElevenLabs Agents and Channels do comparable work on customer support and voice agent; both also serve buyers who need to handle customer support conversations; same layer and the same scale band (late-stage private).

Assembled from the recorded fields for this pair, not hand-checked. The comparison below is read from each company’s own profile.

3 of 12 capabilitiesShared product typeSame scale band

3 of 12 capabilities — Shares customer support, voice agent and workflow automation.

Ludbee capability tags · from the product records

Shared product type — Both ship application.

Ludbee product records

Same scale band — Both late-stage private.

Ludbee scale bands · from valuation and funding figures

Aligned comparison

FieldElevenLabsSierra
Valuation$11B$15.8B Sierra has 44% more
Employees450549 Sierra has 22% more
Founded20222023 1 yrs later
StatusPrivatePrivate match
CategoryApplicationApplication match
Stack layerAPI service, Agent platform, ApplicationAI agent, Application, Developer tool
HeadquartersNew York, USASan Francisco, USA

Capability overlap

Shared · 3

Customer supportVoice agentWorkflow automation

Not verified for Sierra · 9

Audio editingImage editingImage generationMusic generationSpeech to textText to speechTranslationVideo generationVoice conversion

Recorded for ElevenLabs. Sierra’s product records say nothing either way — a missing record is not a missing capability.

Not verified for ElevenLabs · 4

Agent orchestrationData analysisEvaluation and observabilityText generation

Recorded for Sierra. ElevenLabs’s product records say nothing either way — a missing record is not a missing capability.

Products, side by side

Algorithmic pairing — assembled from recorded fields, not hand-checked

ElevenLabs

Application

AI Voice ChangerApplication

Real-time and file-based voice conversion tool that changes a recorded voice while preserving its original performance.

Ads EngineApplication

Localizes and refreshes advertising creative across 50+ languages, with audio dubbing, image adaptation and text translation for Google Ads and Meta Ads.

DubbingApplication

Audio-to-audio dubbing across 90+ languages and accents that conditions on source performance (not a transcript) to preserve emotion and tone, with voice cloning.

ElevenCreativeApplication

AI-native creative workspace unifying voice, music, sound-effect, image and video generation with dubbing/localization, editable in a browser Studio.

ElevenCreative FlowsApplication

Chains image, video, voice and SFX generation into automated visual flows to create unlimited campaign variations from one template.

ElevenLabs Voice CloningApplication

Instant and Professional voice cloning (IVC/PVC) that creates a synthetic replica of a speaker's voice.

ElevenMusicApplication

Music generation, remixing and creation product ("Listen, remix, and create tracks"), built on the Music v2 engine, targeted at independent musicians.

Image to Video AI ConversionApplication

Creates videos from images and integrates AI voice, using a credit-based system.

StudioApplication

End-to-end workflow for producing audiobooks, podcasts and narrated videos, integrating Voice Library, Voice Design, Professional Voice Cloning and Eleven Music.

Text to Sound EffectsApplication

Generates sound effects from text prompts, with royalty-free commercial usage rights on paid plans.

Voice DesignApplication

Generates customized synthetic voices from text descriptions, powered by the Text to Speech v3 model.

Voice IsolatorApplication

Removes background noise, isolates vocals and removes music from audio or video recordings.

Sierra

Application

Agent StudioApplication

Empower customer experience teams to build and manage agents—without writing a line of code. Set up customer journeys, configure knowledge, and define brand guidelines effortlessly.

ChannelsApplication

Create consistent experiences across voice, chat, email, and more in 58 languages, available 24/7/365.

ExplorerApplication

Ask any question in natural language, and Explorer will use analytics and sample customer conversations to provide answers and actionable recommendations.

GhostwriterApplication

Build or modify your agent simply by describing how you want your agent to behave. Prompt workflows, systems integrations, guardrails, tone, and style.

HorizonApplication

Long-horizon agents that get more intelligent with every interaction.

InsightsApplication

Measure what matters, test what works, and understand every agent decision with analytics, experimentation, and observability built for continuous improvement.

No counterpart

ElevenLabs sells these in a stack layer with no product recorded for Sierra yet — nothing on the other side to compare them against.

API service

ElevenAPIAPI service

Unified programmatic API for ElevenLabs' audio AI models (speech, voice, music, sound effects, dubbing, transcription), billed per usage from the shared credit pool.

ElevenLabs Text to SpeechAPI service

Generates speech from text in a range of voices and languages, in the browser and through an API.

ScribeAPI service

Transcribes audio to text with speaker labels and word-level timings.

Agent platform

ElevenLabs AgentsAgent platform

Builds and runs voice AND chat agents that handle customer conversations over the phone, on the web and in chat, with enterprise integrations into CRM, payment and calendar systems.

Sierra sells these in a stack layer with no product recorded for ElevenLabs yet — nothing on the other side to compare them against.

AI agent

SierraAI agent

Platform for building and running customer-facing agents that handle support conversations over chat and voice.

Developer tool

Context EngineDeveloper tool

Supplies persistent customer context and behavioral signals to Sierra's conversational agents.

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