The Best AI Voice Agents (2026)
6 AI voice agent platforms — Vapi, Retell AI, Bland AI, ElevenLabs Conversational AI, LiveKit Agents and PolyAI — compared on what actually differs: how much of the stack you own vs. assemble yourself, whether you can self-host it, the real per-minute cost once every billed component is added up, and how much enterprise track record backs the vendor.
Ask any of these six vendors what a call costs and you will get a different kind of answer — and one of them will remind you that you don't have to pay a vendor for the infrastructure at all. Vapi, Retell AI and ElevenLabs Conversational AI all quote a per-minute or per-plan headline rate that covers only part of the pipeline — the language model, the voice and (for two of them) the phone line itself bill separately on top, and each vendor's own listing admits the real all-in cost typically runs meaningfully above the number on the pricing page. Bland AI owns its full stack and charges one published, all-inclusive per-minute rate with no separate pass-throughs. LiveKit Agents is the exception on ownership: an open-source, Apache 2.0 framework you can self-host entirely, or run on its managed Cloud tier, rather than a closed API you can only rent.
A third split is about company maturity and how open the door is. PolyAI predates every other platform here by years — founded in 2017, versus 2021 or later for the rest — and it shows in scale: 200+ named enterprise customers and thousands of live deployments across 75+ languages, backed by a $750M valuation with NVIDIA's NVentures among its Series D investors. Until May 2026 it was also the most closed of the six: sales-led only, no public price at all. That changed with a self-serve tier, free for two months from just an email address — though PolyAI has not disclosed what happens once that period ends, and its flagship enterprise deployments (like PG&E's 16-million-call-a-year operation) still run through a separate, custom-quoted sales engagement.
So before comparing features, compare those three things — who owns the infrastructure, how the bill is really built, and how much enterprise track record and sales process still comes with the vendor. This is the 6 Published, independently researched AI voice agent platforms in our index, ordered from maximum build-your-own flexibility, through the voice-quality specialist's own agent layer, to the platform that owns and publishes its entire stack's price, closing with the two extremes of maturity: the newest, fully open-source option, and the oldest, enterprise-proven incumbent now opening up.
How we ranked these
Every entry is a Published listing that already cleared this site's per-listing quality gate — sourced facts, admitted weaknesses, a "best for" and a "not for," re-verified on a rolling cadence (see /methodology). The ordering runs from the most build-your-own hosted platform (Vapi) through the voice-quality specialist's own agent layer (ElevenLabs Conversational AI) to the published all-inclusive hosted option (Bland AI) and the genuinely open-source, self-hostable option (LiveKit Agents), closing with the oldest and most enterprise-proven platform (PolyAI) — grouped around the ownership-and-pricing-transparency split described above rather than a single "best overall" pick, since the six serve different buying priorities. The live score chip on every card (evidence, honesty, depth, freshness) is computed the same way as that tool's own listing page.
The ranking
Editor’s pick
#1
VapiThe developer platform for voice AI agents, bring your own model, voice and telephony, and Vapi orchestrates the call.
7.4Best forEngineering teams that want maximum control to build custom voice agents on their own choice of model, voice and telephony.
The developer's default when you want to own every layer: pick your own speech-to-text, LLM and text-to-speech providers and Vapi orchestrates the real-time call at sub-500ms latency, including multi-agent "squads" that hand off mid-conversation. The $0.05/min headline is only the orchestration fee, though — model, voice and telephony bill on top, so the real all-in cost typically lands around $0.13-0.33/min, and there is no turnkey no-code path for non-technical teams.
- #2
Retell AIA voice AI platform for human-sounding phone agents, build a call flow, plug in your model and telephony, ship.
7.8Best forProduct and engineering teams that want a low-latency, human-sounding phone agent with flexible model and telephony choice.
The platform users most consistently praise for how natural its calls sound, backed by a proprietary turn-taking model targeting roughly 600ms latency, a real conversation-flow builder, an auto-syncing knowledge base and AI-simulated QA testing before launch. Pricing is component-based like Vapi’s: the $0.07/min headline realistically climbs to $0.13-0.20+/min once a full LLM, voice and telephony stack is added, and it assumes technical staff to configure well.
- #3
Bland AIEnterprise voice AI that runs on its own infrastructure, build calls as conversational pathways, priced all-in per minute.
7.2Best forSecurity-conscious enterprises in regulated industries that want a compliant, infrastructure-owned voice platform with deterministic call flows.
The only hosted platform here that runs its own model stack end to end and charges a single per-minute rate ($0.11-0.14/min by tier) with no separate model, voice or telephony pass-throughs — a genuinely predictable bill. That ownership also underpins the strongest compliance story here (SOC 2, HIPAA, PCI DSS, self-hosted/on-prem, US/EU/APAC residency), aimed squarely at regulated enterprises. Independent reviews report real-world latency nearer ~800ms than the marketed figure, and language support beyond English is effectively an enterprise-tier feature.
- #4
ElevenLabs Conversational AIThe voice-quality specialist’s own agent layer, 10,000+ voices and instant cloning, with a bring-your-own-LLM brain.
8.1Best forDevelopers and product teams who want best-in-class voice quality and cloning as the foundation of their agent, and are comfortable assembling the rest of the stack themselves.
Built the opposite direction from Vapi and Retell: instead of starting as an orchestration platform and treating voice as a swappable component, ElevenLabs wraps an agent layer around its own widely-used text-to-speech and instant voice-cloning models — 10,000+ voices, native speech in 70+ languages, and a flexible LLM layer (its own hosted model for the lowest latency, or bring your own key, including open-source models). The newest and best-funded hosted entrant ($11B valuation, $330M+ 2025 ARR, production customers including Deutsche Telekom, Square and Revolut), but its own listing flags the same stacked-pricing pattern Retell AI reviewers cite — a subscription minute pool plus overage plus separate LLM and telephony costs — and it covers the voice/orchestration layer only, not a turnkey CRM-connected ops product.
- #5
LiveKit AgentsThe open-source, self-hostable voice agent framework, Apache 2.0, provider-agnostic, and the infrastructure behind ChatGPT’s Advanced Voice Mode.
7.7Best forEngineering teams that want to own their voice-agent stack end to end — self-hosted or on LiveKit Cloud — without being locked into one vendor’s API.
The only one of the five that is genuinely open-source (Apache 2.0) and fully self-hostable — real production weight behind it (it powers OpenAI’s ChatGPT Advanced Voice Mode, plus xAI, Salesforce and Tesla) and a real free tier (1,000 agent-session minutes/month, no card). The tradeoff: it’s a framework, not a dashboard — you write and deploy code yourself, and the free tier’s small inference credit means meaningful usage still means paying LiveKit or a model provider on top.
- #6
PolyAIThe pre-LLM-era enterprise voice AI incumbent — $750M-valued, 200+ enterprise customers — that opened a genuine self-serve, free-to-start tier in May 2026.
7.6Best forTeams that want a proven, enterprise-scale, compliance-certified voice AI vendor and are willing to start on its new self-serve free tier before deciding whether a larger, sales-led enterprise engagement makes sense.
The oldest name in this category by far — founded in 2017, years before any of the other five existed — and the one built around the deepest enterprise deployment history: 200+ named customers and thousands of live deployments across 75+ languages in 25+ countries, backed by a $750M valuation with NVIDIA’s NVentures among its Series D backers. Until May 2026 it was also the most closed platform here — sales-led only, no public price. That changed: PolyAI now offers a genuine self-serve tier, free for two months from just an email address, though what pricing applies after that isn’t disclosed, and its largest deployments still run through a separate, custom-quoted enterprise sales engagement.
Side by side
All 6 compared. Scroll the table sideways, the fact column stays pinned →
| Feature | Vapi | Retell AI | Bland AI | ElevenLabs Conversational AI | LiveKit Agents | PolyAI |
|---|---|---|---|---|---|---|
| Description | The developer platform for voice AI agents, bring your own model, voice and telephony, and Vapi orchestrates the call. | A voice AI platform for human-sounding phone agents, build a call flow, plug in your model and telephony, ship. | Enterprise voice AI that runs on its own infrastructure, build calls as conversational pathways, priced all-in per minute. | The voice-quality specialist’s own agent layer, 10,000+ voices and instant cloning, with a bring-your-own-LLM brain. | The open-source, self-hostable voice agent framework, Apache 2.0, provider-agnostic, and the infrastructure behind ChatGPT’s Advanced Voice Mode. | The pre-LLM-era enterprise voice AI incumbent — $750M-valued, 200+ enterprise customers — that opened a genuine self-serve, free-to-start tier in May 2026. |
| Category | Voice agents | Voice agents | Voice agents | Voice agents | Voice agents | Voice agents |
| Pricing | $0.05 / min | $0.07–$0.31 / min | $0.14 / min | $0 / mo | $0 / month | Free / for the first 2 months |
| Tier | Listed | Listed | Listed | Listed | Listed | Listed |
| API | Yes | Yes | Yes | Yes | Yes | Yes |
| Tags |
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Frequently asked questions
- What is the best AI voice agent platform?
- It depends on what you are optimizing for. For maximum control and provider flexibility, Vapi. For the most natural-sounding calls and lowest latency among hosted build-your-own platforms, Retell AI. For one predictable all-inclusive price and the strongest compliance story, Bland AI. For the best raw voice quality and instant cloning as the foundation of the agent itself, ElevenLabs Conversational AI. For a fully open-source, self-hostable framework with no vendor lock-in, LiveKit Agents. For the deepest enterprise track record with a new, genuinely free way to try it first, PolyAI.
- Which AI voice agent platform has true all-inclusive pricing?
- One does with a public rate: Bland AI publishes a single per-minute rate ($0.11-$0.14/min depending on tier) that already includes the LLM, speech-to-text and text-to-speech, with no separate model or voice pass-throughs. PolyAI's enterprise deployments are also all-inclusive per minute, but that rate is never published — it's negotiated per sales engagement, and its newer self-serve tier (free for two months) doesn't disclose what it costs afterward either. Vapi, Retell AI and ElevenLabs Conversational AI all quote a lower headline rate that climbs once you add a model, a voice and telephony on top. LiveKit Agents sits outside this comparison entirely — it's open-source and self-hostable, so "all-inclusive" depends on which model/voice providers you wire in, or whether you use LiveKit's own metered Inference gateway.
- How much do AI voice agent platforms actually cost per minute?
- Vapi: $0.05/min orchestration fee, realistically $0.13-0.33/min all-in. Retell AI: $0.07-0.31/min headline, realistically $0.13-0.20+/min once fully specced. Bland AI: $0.11-0.14/min, all-inclusive. ElevenLabs Conversational AI: a monthly subscription ($0 to $990) covering a set minute pool, then $0.08/min overage ($0.16/min in burst), plus separate LLM and telephony usage. LiveKit Agents: free up to 1,000 agent-session minutes/month, then plans starting at $50/month (5,000 minutes) or $500/month (50,000 minutes), plus a separate inference credit or your own provider billing for the LLM/STT/TTS models themselves. PolyAI: free for the first two months on its new self-serve tier (no published rate after that), or a custom, unpublished per-minute rate for enterprise deployments negotiated per sales engagement.
- Which of these six owns its own infrastructure end to end?
- Two do, in different ways: Bland AI and PolyAI both run their own model stack end to end as a hosted service — Bland AI publishes its all-inclusive rate, PolyAI negotiates its enterprise rate per sales engagement (its newer self-serve tier doesn't disclose post-trial pricing either). LiveKit Agents is open-source (Apache 2.0) and fully self-hostable — you can run the entire stack on your own infrastructure, or use LiveKit's managed Cloud if you'd rather not. Vapi, Retell AI and ElevenLabs are all bring-your-own-provider to some degree, but remain closed-source hosted platforms you can only rent.
- Which is cheapest to start using?
- By headline rate, Vapi's $0.05/min orchestration fee is the lowest per-minute number on the page. For an actually usable free tier, LiveKit Agents (1,000 agent-session minutes/month, no credit card, no time limit) is more generous long-term than ElevenLabs' $0 tier (15 minutes/month) or PolyAI's new self-serve tier (fully free, but only for two months, with no disclosed rate afterward). But headline price is not real cost for most of these six — Vapi, Retell AI, Bland AI and LiveKit all bill separately for at least some of the model/voice/telephony components a full deployment needs.
- Is there an open-source alternative to these hosted platforms?
- Yes — LiveKit Agents is the one genuinely open-source (Apache 2.0), self-hostable framework in this category. It requires writing and deploying your own code rather than configuring an agent through a dashboard, but it removes vendor lock-in entirely and is proven at serious production scale: it powers OpenAI’s ChatGPT Advanced Voice Mode, alongside customers including xAI, Salesforce and Tesla.
- Which of these six is built for regulated industries like healthcare or finance?
- Bland AI and PolyAI are both built for this specifically. Bland AI runs its own self-hosted infrastructure and offers SOC 2 Type II, HIPAA and PCI DSS v4.0 compliance plus self-hosted or on-premises deployment with US, EU and APAC data residency. PolyAI ships SOC 2, HIPAA, GDPR and PCI DSS compliance built into its platform and has the longer enterprise track record of the two (proven at PG&E, UniCredit and others), though its largest regulated-industry deployments still run through a sales-led enterprise engagement rather than the new self-serve tier. LiveKit Agents is the other option worth evaluating here — as a self-hosted open-source framework it gives a team full control over where data lives, though compliance certifications and audit work are then the deploying team's own responsibility rather than a vendor-provided package.
- Which of these six has the deepest enterprise track record?
- PolyAI, by a clear margin. Founded in 2017 — years before Vapi, Retell AI, Bland AI, ElevenLabs Conversational AI or LiveKit Agents existed — it now counts 200+ named enterprise customers and thousands of live deployments across 75+ languages in 25+ countries, backed by a $750M valuation (December 2025 Series D, with NVIDIA's NVentures among the investors) and a Forrester study modeling 391% three-year ROI for a composite customer. Unlike the other five, its deepest deployments (e.g. PG&E's 16-million-call-a-year operation) still run through a sales-led enterprise engagement rather than its newer self-serve tier.