ElevenLabs vs Vapi: Own the voice stack or orchestrate third-party providers?

TL;DR

ElevenLabs and Vapi both offer platforms for building AI voice agents, but their approaches differ significantly. ElevenLabs owns the full voice stack, including TTS, STT, and agent logic, delivering sub-500ms end-to-end latency with no middleware overhead. Vapi is a modular orchestration layer that connects 14+ TTS providers, multiple STT options, and any LLM, offering maximum flexibility to swap components. The tradeoff: Vapi's advertised $0.05/min is only the orchestration fee, and real production costs typically reach $0.20-0.30/min when all components are included. ElevenLabs' best voice is also Vapi's best voice, since many Vapi users select ElevenLabs as their TTS provider. Choose ElevenLabs if you want the best voice quality with the lowest latency and transparent pricing. Choose Vapi if maximum provider flexibility is more important than quality, cost, or latency.

At-a-glance comparison

Full-stack: owns TTS, STT, and agent logic. No cross-provider network hops, no middleware markup, no third-party dependencies.

Middleware: orchestrates 14+ TTS, multiple STT, and any LLM. Maximum flexibility to swap components.

Voice Library

Over 11,000 voices across 70+ languages and regional accents. Users can design new voices from a text prompt or clone their own. Expressive Mode enables emotionally intelligent voices that adapt tone to conversational context.

Integrates with 14+ TTS providers, including ElevenLabs, allowing users to select from various voice options. Best quality option is ElevenLabs itself.

Voice Cloning

Professional cloning from 30 seconds; available from $5/mo.

Via ElevenLabs integration (full voice model selection).

TTS

Own models (Eleven v3 and v3 Conversational, Flash v2.5 at 75ms, 11,000+ voices, 70+ languages)

7+ providers: ElevenLabs, OpenAI, Deepgram, Cartesia, and more

STT

Scribe v2 Realtime (~80ms in agents). Built in-house, co-located with TTS and agent logic.

Third-party: Deepgram, AssemblyAI, others.

Latency

Sub-500ms end-to-end latency through co-location of models, eliminating extra server calls between providers. Flash TTS delivers ~75ms and Scribe v2 delivers ~80ms STT.

When paired with optimized providers, can achieve sub-500ms latency. Multi-vendor setup introduces additional latency.

Multilingual

70+ languages covering 90% of the global population. Automatic language detection with voice switching and mid-conversation adaptation, no manual configuration required.

Language capabilities vary by provider choice. Requires explicit configuration and programmatic voice switching.

Agent Builder

Agent builder with webhooks, tools, knowledge base, agent versioning, visual workflows.

Assistants + Squads (multi-agent), function tools, MCP servers, CLI.

Built-in System Tools

End call, language detection & auto-switch, agent transfer, transfer to human, DTMF send (for IVR navigation), skip turn, voicemail detection. Full enterprise telephony capabilities out of the box.

Transfer call, end call, send SMS, DTMF send & receive user input.

Tools & API Calls

Four tool types: client tools (browser/app-side), server tools (webhook to your API), MCP tools (Model Context Protocol servers with fine-grained approval controls), and system tools (built-in actions like call transfer, voicemail detection, language detection, end call). Works across both telephony and web-based agents.

Supports function tools (server-side via webhook/Server URL), MCP servers, and built-in system tools. Also offers a CLI for terminal-based management and testing. Custom tool responses can be used to extract variables for analytics grouping.

LLM

Allows users to select from leading models from OpenAI, Anthropic, Google, and DeepSeek. Custom LLM integration is also available.

Allows integration with various LLMs, including OpenAI and Anthropic, and supports bringing your own models.

Knowledge Base

Import files, URLs, or plain text to equip agents with domain-specific information. Vertically integrated RAG co-located with STT and TTS for grounding responses in enterprise data with minimal retrieval latency.

Manual configuration and explicit prompting required. Files must be limited to 300KB for optimal performance. Must connect external RAG systems (Pinecone, etc.) for advanced use.

Testing & Workflows

Visual workflow builder for complex conversation logic, including routing to specialized sub-agents and human agent transfers. Built-in testing suite to run agent simulations, define success criteria, and validate tool calls before deploying to production.

Provides real-time analytics and call monitoring features, along with automated testing to identify risks before production.

Telephony

Provider-agnostic: supports any telephony provider through standard audio formats (PCM 8000 Hz and u-law 8000 Hz), including Twilio, Telnyx, Vonage, and custom SIP setups. No vendor lock-in.

Integrates with existing telephony systems, including Twilio, Vonage, Telnyx, Plivo, Amazon Connect, and SIP trunking.

Deployment Channels

Omnichannel: deploy across phone lines (SIP), websites (widget/SDK), mobile apps, WhatsApp, and chat, all from a single agent configuration. Design once, deploy everywhere.

Supports phone-based deployments via Twilio and SIP. Chat API with streaming and non-streaming modes, OpenAI-compatible endpoints, SMS chat, and a web widget.

Chat/Text Mode

Agents can process both spoken and written inputs and respond in real time across voice and text channels. WhatsApp integration for both inbound/outbound voice and text conversations.

Chat API with streaming and non-streaming modes, OpenAI-compatible endpoints, session management, SMS chat, and a web widget.

Concurrency

Concurrency by tier for ElevenLabs base plans is available on the pricing page. Custom limits are available to handle scale for the largest enterprises.

Default concurrency of 10 for standard accounts. Enterprise plans offer unlimited concurrency with reserved capacity. Concurrency can be increased on request.

Guardrails

Customizable guardrails for real-time compliance monitoring during live conversations, including content filtering, topic restrictions, and PII redaction. Configurable per agent to enforce brand, regulatory, and safety policies without post-call remediation.

Configurable artifact plans for recording, logging, and transcripts. HIPAA mode with zero data retention option. PCI compliance for payment data.

Compliance

SOC 2 Type II, ISO 27001, PCI DSS Level 1, HIPAA, Zero Retention Mode, EU data residency.

SOC 2 Type II, HIPAA (with hipaaEnabled flag + BAA), GDPR; no ISO 27001, no EU data residency.

Data Retention

Configurable retention from immediate deletion to unlimited storage. Zero Retention Mode ensures data is never persisted and supports HIPAA compliance.

Configurable artifact plans for recording, logging, and transcripts. HIPAA mode with zero data retention option. Custom cloud storage (S3, GCS, Azure, Cloudflare R2).

SDKs & Deployment

JavaScript, Python, Swift (iOS), Kotlin (Android), React Native SDKs. Pre-built React UI component library (shadcn-based). Embeddable web widget. WebSocket API for custom implementations.

JavaScript, Python, and other client SDKs. Web SDK with embeddable voice widget. CLI tool for terminal-based management. Server URL webhook pattern for advanced integrations.

Tracking & Analytics

Real-time analytics with access to past recordings, transcripts, and call summaries. Offers custom evaluation prompts to tag calls based on internal success criteria and extract structured data from transcripts. Real-time monitoring dashboard. Version control for agents. Built-in agent testing with conversation simulations.

Provides real-time analytics and call monitoring features, along with automated testing to identify risks before production.

Beyond Agents

14 products: TTS, STT, dubbing, SFX, music, cloning, and more.

Voice agents only.

Pricing

Per-minute pricing. All core platform features, including testing, workflows, analytics, and omnichannel deployment, are included.

$0.05/minute platform fee plus at-cost pass-through for all provider costs (STT, LLM, TTS, telephony). Real total: $0.07-0.33/min. Volume discounts available for enterprises.

Free Tier

10,000 credits/mo.

$10 free credits (no perpetual free plan).

Detailed comparison

Architecture: full-stack vs orchestration layer

ElevenAgents owns the full stack. TTS, STT (Scribe v2 Realtime), turn-taking, voice activity detection, and agent logic all run within the same platform. Voice data flows through a single optimized pipeline with no cross-provider network hops, no middleware markup, and no third-party dependencies. Because ElevenLabs is a research company that builds its own foundational audio models, breakthroughs in speech generation, recognition, and turn-taking ship directly into the agent experience within weeks. This is a structural advantage that orchestration platforms cannot replicate: features like Expressive Mode were built by co-optimizing turn-taking and TTS together, something only possible with a vertically integrated stack.

Vapi positions itself as a modular infrastructure layer where you plug in your preferred STT, LLM, and TTS providers independently. This gives developers the flexibility to mix and match providers, which appeals to teams that want to experiment across AI stacks or avoid vendor lock-in. The Assistants and Squads model enables single-agent and multi-agent orchestration, and Code Tools allow running TypeScript serverless functions as part of the conversation flow. However, Vapi's flexibility comes at the cost of additional latency, since each provider handoff adds network delay, and stacked pricing, since each provider charges independently on top of Vapi's orchestration fee.

Bottom line: ElevenLabs delivers a tighter, faster, more cost-effective pipeline by owning the stack. Vapi offers maximum flexibility to mix and match providers, which appeals to teams that want to experiment across AI stacks or avoid vendor lock-in.

Voice quality

ElevenLabs is ranked #1 in human preference globally across independent evaluations. On Poe AI Model Rankings, the top two audio models are both ElevenLabs. The platform offers over 11,000 voices across 70+ languages with regional accents, professional voice cloning from just 30 seconds of audio, and custom voice design from text prompts. The Eleven v3 Conversational model powers Expressive Mode, enabling emotionally intelligent voices that adapt tone to conversational context, detecting frustration and responding with empathy. This level of voice expressiveness requires co-optimization of turn-taking, voice activity detection, and TTS, which is only possible with a vertically integrated stack.

Vapi does not build its own voices. When Vapi users want the best voice quality, they select ElevenLabs as their TTS provider, meaning they get ElevenLabs' voice quality but with added middleware latency and cost. When they select cheaper alternatives to reduce costs, voice quality drops. The overall experience varies significantly depending on provider configuration, and users have no access to features like Expressive Mode that depend on vertical integration.

Bottom line: ElevenLabs is Vapi's best TTS option. Using ElevenLabs directly gives you the same voice quality without the middleware overhead, plus access to Expressive Mode and other features exclusive to the integrated stack.

Latency and real-time performance

ElevenAgents delivers sub-500ms end-to-end latency. The full-stack architecture eliminates cross-provider network hops, producing consistently fast response times. Flash v2.5 TTS delivers ~75ms latency, and Scribe v2 Realtime achieves ~80ms latency within the agents platform. ElevenLabs-hosted LLMs are co-located with other components, providing best-in-class reasoning latency. Because all models are co-located in a single pipeline, there is no incremental latency from network hops between separate services.

Vapi can achieve almost similar latency when fully optimized, but doing so requires careful coordination across multiple third-party providers. Each component in the pipeline (STT, LLM, TTS) introduces its own processing and network latency. The orchestration layer itself adds overhead, and performance varies depending on provider selection and configuration. Default settings and less optimized configurations will produce notably higher latency.

Bottom line: ElevenLabs provides consistently lower latency by co-locating its in-house models. Vapi's latency depends on the combined performance of each third-party provider in the stack, requiring careful optimization to approach comparable speeds.

Developer experience and agent building

Vapi offers a developer-first platform with broad provider optionality and multi-agent orchestration via its Assistants and Squads model. Code Tools allow running TypeScript serverless functions as part of conversations. The platform has 60+ GitHub repos and open-source documentation. However, developer experience has its pain points. G2 reviewers have described Vapi's documentation as inconsistent in some areas, and the platform's complexity can create a steep learning curve.

ElevenAgents provides an agent builder with webhooks, tool integration, knowledge base/RAG, and visual workflow capabilities. The platform supports four tool types (client, server, MCP, and system tools), agent versioning, built-in testing with conversation simulations, and Guardrails for real-time compliance monitoring. SDKs cover Python, JavaScript, React, React Native, Swift, and Kotlin. ElevenLabs has the largest voice AI developer community with over 100,000 developers who have launched an agent, and documentation includes an interactive API playground.

Bottom line: Vapi offers more provider flexibility and multi-agent orchestration. ElevenLabs provides a cleaner developer experience with broader SDK support, built-in testing, visual workflows, and the largest voice AI developer community. Both support MCP tools.

Pricing transparency

This is one of the most significant differences between the two platforms.

Vapi advertises $0.05/min as its headline price. But $0.05/min covers only Vapi's orchestration fee, and it does not include any of the actual AI components. Real costs include:

STT: ~$0.01/min

LLM: $0.02-0.20/min (depending on model)

TTS: $0.01-0.065/min (depending on provider)

Telephony: $0.008-0.015/min

Total realistic cost: $0.07-0.33/min depending on configuration. Most production deployments cost $0.20-0.30/min.

ElevenLabs uses credit-based plans bundled with the broader platform, including TTS, STT, and creative tools. Pricing is transparent and per-minute, with no hidden component stacking. Enterprise custom pricing is available, including outcome-based pricing options.

Bottom line: Vapi's advertised $0.05/min headline is misleading. The $0.05/min orchestration fee is only a fraction of total costs. ElevenLabs offers transparent all-in pricing without hidden component stacking.

Telephony and channels

Vapi integrates with existing telephony systems including Twilio and offers SIP telephony support. The platform supports chat via API with streaming and non-streaming modes, OpenAI-compatible endpoints, SMS chat, and a web widget. Vapi provides flexibility in telephony provider selection.

ElevenAgents supports omnichannel deployment: phone lines (SIP), websites (widget/SDK), mobile apps, WhatsApp, and chat, all from a single agent configuration. Telephony integrations include native Twilio, SIP trunking, plus Genesys, Vonage, Telnyx, and Plivo. The platform supports PCM 8000 Hz and u-law 8000 Hz for any provider, with batch outbound calling via API. Telephony benefits from the lower latency of the full-stack architecture.

Bottom line: Both platforms support telephony and SIP. ElevenLabs adds WhatsApp as a channel and benefits from lower end-to-end latency. Vapi offers telephony provider flexibility. Evaluate based on your specific carrier and channel needs.

Compliance

Vapi holds SOC 2 Type II, HIPAA, and GDPR. HIPAA compliance requires explicitly enabling a flag per assistant. Vapi does not hold ISO 27001 certification or offer EU data residency. Vapi also lacks end-to-end encryption and does not provide default no-training guarantees (users must opt out).

ElevenLabs offers the deepest compliance footprint in the category. Certifications include SOC 2 Type II, SOC 3, ISO/IEC 27001:2022, ISO/IEC 27017, ISO/IEC 27018, PCI DSS Level 1 (externally validated), CSA STAR Level 1, HIPAA (BAA available), HDS, TXRAMP Level 2, Cyber Essentials Plus, NHS DSP Toolkit, GDPR, and CCPA. The platform provides end-to-end encryption, Zero Retention Mode for sensitive data handling, data residency in US, EU, and India, and Guardrails for real-time compliance monitoring. ElevenLabs also offers the first insurable AI agents, a category first.

Bottom line: ElevenLabs offers significantly broader compliance coverage, including PCI DSS Level 1, ISO 27001, EU data residency, end-to-end encryption, and Zero Retention Mode. Vapi provides SOC 2 and HIPAA but lacks several enterprise-critical certifications. Choose based on your regulatory requirements.

Platform breadth

ElevenLabs offers 14 products: Text to Speech, Speech to Text, Voice Cloning, AI Dubbing, Sound Effects, AI Music, Conversational AI, Voice Isolator, Voice Changer, Voice Library, Projects/Studio, Audio Native, Pronunciation Dictionaries, and ElevenReader. Teams building products where voice goes beyond agents, such as localization, content creation, dubbing, and accessibility, get everything from one platform and one API.

Vapi is focused exclusively on voice agents. This means deep investment in the agent building experience, but no broader audio capabilities for teams with adjacent voice needs.

Bottom line: ElevenLabs is a broader audio AI platform serving the full range of voice use cases. Vapi is specialized for voice agents only. If your organization has voice needs beyond agents, ElevenLabs provides a single platform investment.

Who should choose ElevenLabs

ElevenLabs is the right choice if you:

• Want the best voice quality available, as ElevenLabs is the #1 rated TTS in human preference globally
• Need consistently low latency without optimizing across multiple third-party providers
• Are already using or considering ElevenLabs for TTS and want to eliminate middleware cost and latency
• Want transparent, predictable pricing without hidden component stacking
• Need voice capabilities beyond agents (TTS API, dubbing, SFX, music, cloning)
• Need Zero Retention Mode, EU data residency, PCI DSS Level 1, or insurable AI agents
• Prefer comprehensive documentation, broader SDK support (6 platforms), and built-in testing

Ideal ElevenLabs customer: A team building voice agents that prioritizes voice quality, latency, and cost transparency, especially teams who would choose ElevenLabs TTS through Vapi anyway and want to cut out the middleware.

Who should choose Vapi

Vapi is a strong option if you:

• Need maximum flexibility to swap STT, LLM, and TTS providers independently
• Want multi-agent orchestration with Squads for complex conversation flows
• Need to run custom TypeScript functions as part of conversations (Code Tools)
• Prefer to avoid vendor lock-in on any single component
• Have a team with the technical depth to optimize provider configurations and manage the complexity

Ideal Vapi customer: A developer-heavy team that values infrastructure flexibility and wants to experiment across multiple AI stacks, and is willing to accept higher total cost and latency for that flexibility.

Migrating from Vapi to ElevenLabs

If you are a Vapi customer considering switching to ElevenLabs Conversational AI:

What transfers

• Agent logic and conversation flows can be recreated in the ElevenLabs visual workflow builder
• Knowledge base content (files, URLs, plain text) can be imported directly
• Phone numbers (if portable) can transfer to ElevenLabs telephony
• If you were already using ElevenLabs as your TTS provider through Vapi, your voice configuration carries over

What needs rebuilding

• Squads multi-agent configurations need to be redesigned using ElevenLabs workflows and subagent architecture
• Code Tools: TypeScript serverless functions need to be reimplemented as ElevenLabs tools (client/server/system)
• Provider-specific tuning: STT and TTS provider configurations are no longer needed (ElevenLabs provides its own)
• Integrations: Webhook and CRM integrations need reconfiguration

Migration timeline

Plan 1-2 weeks for a full migration, depending on complexity. Simple single-agent deployments can be migrated in 2-3 days. If you were already using ElevenLabs as your TTS provider through Vapi, voice quality stays the same but latency and cost improve. ElevenLabs offers Forward Deployed Engineers who can partner with your team to accelerate migration and co-develop your agent experience. Start with the free tier to build and test agents.

FAQ

Is ElevenLabs better than Vapi for voice agents?

ElevenAgents offers better voice quality, lower latency, and more transparent pricing than Vapi. ElevenLabs delivers sub-500ms end-to-end latency because it owns the full voice stack rather than orchestrating third-party providers. Many Vapi customers already select ElevenLabs as their TTS provider, and ElevenAgents eliminates the middleware layer, delivering the same voice quality with less latency and lower total cost. Vapi's advantages include multi-provider flexibility, Squads multi-agent orchestration, and Code Tools for running custom TypeScript functions.

How much does Vapi really cost?

Vapi advertises $0.05/min, but this covers only the orchestration fee. Real production costs include STT (~$0.01/min), LLM ($0.02-0.20/min depending on model), TTS ($0.01-0.065/min depending on provider), and telephony ($0.008-0.015/min). Total realistic cost ranges from $0.07-0.33/min depending on configuration. Most production deployments cost $0.20-0.30/min. Budget configurations run around $0.07/min but sacrifice voice quality.

Does Vapi use ElevenLabs?

Yes. Vapi integrates with ElevenLabs as one of its 14+ TTS providers. Many Vapi users select ElevenLabs for voice generation because it ranks highest in voice quality evaluations. When using ElevenLabs through Vapi, users get ElevenLabs voice quality but pay both Vapi's orchestration fee and ElevenLabs TTS costs, with additional latency from the middleware layer.

Can I switch from Vapi to ElevenLabs?

Yes. Agent logic, knowledge base content, and phone numbers (if portable) can transfer to ElevenAgents. Squads multi-agent configurations and Code Tools need to be redesigned. If you were using ElevenLabs as your TTS provider through Vapi, voice quality stays the same but latency and cost improve. Plan 1-2 weeks for a full migration. ElevenLabs offers Forward Deployed Engineers to accelerate the process. Start with the free tier to build and test agents.

What is the best alternative to Vapi?

ElevenLabs is the top alternative to Vapi for teams that want to own the voice stack and reduce latency and total cost. ElevenLabs offers sub-500ms latency, 11,000+ voices across 70+ languages, and a full audio AI platform beyond agents. Other alternatives include Retell (for a visual no-code agent builder with multi-provider support), Bland (for enterprise-grade phone call automation), and building a custom stack by integrating STT, LLM, and TTS providers directly.

Is Vapi open source?

Vapi's client SDKs and some tooling are open source (60+ GitHub repos), but the core orchestration platform is not. The open-source components cover client-side integration but not the server-side agent logic, routing, or telephony infrastructure. ElevenLabs similarly provides open-source SDKs for client integration while the platform itself is proprietary.

Related pages

• Top Vapi Alternatives - Full guide to Vapi alternatives
• ElevenLabs vs Retell - Compare ElevenLabs with another voice agent platform
• ElevenLabs vs Bland - Compare ElevenLabs with Bland's enterprise voice agents
• ElevenLabs vs PlayHT - Compare ElevenLabs with PlayHT (now shut down)
• ElevenLabs Pricing - See all plans and pricing
• Voice Samples and Playground - Hear ElevenLabs voices for yourself
• Compare ElevenLabs - All competitor comparisons