6 researched alternatives
Retell AI Alternatives (2026): 6 Voice Agent Platforms Compared
Compare 6 real alternatives to Retell AI — Vapi, Bland AI, ElevenLabs Conversational AI, Synthflow AI, LiveKit Agents, PolyAI — on pricing model, latency and vendor lock-in, verified live.
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Retell AI is a developer-first voice AI platform built around natural-sounding calls and low latency (~600ms) via its own proprietary turn-taking model, letting teams pick their own LLM, voice and telephony provider.
Why these 6 made the shortlist
It has grown quickly on modest funding — $60M in annualized revenue by April 2026, up roughly 650% year over year, while staying profitable on a single $4.6M seed round — but its pay-as-you-go pricing is component-based: the $0.07/min headline climbs toward $0.13-$0.20+/min once a real LLM, voice and telephony are added, and there is no permanent free tier, just $10 in trial credits.
The six tools below are this site's other Published, individually researched voice-agent listings, each earning its place for a different reason rather than being a drop-in clone: Vapi is the closest developer-first rival, with a cheaper $0.05/min orchestration fee and proven enterprise scale; Bland AI fixes Retell's pricing-complexity problem directly with one all-inclusive per-minute rate; ElevenLabs Conversational AI swaps Retell's per-minute-only billing for subscription tiers built around best-in-class voice cloning; Synthflow AI replaces Retell's API-first builder with a visual, no-code Flow Designer and a named BELL deployment methodology for ops/CX teams, at the cost of a narrower, OpenAI-only model choice; LiveKit Agents is the only genuinely open-source, self-hostable option, with a real free tier; and PolyAI is the pre-LLM-era enterprise incumbent, with deep compliance certifications and a no-code builder Retell doesn't offer. Every fact below traces to each tool's own already-Published, already-sourced listing on this site, re-read fresh for this page.
How we chose these alternatives
These six are drawn from this site's own Published, individually-researched voice-agents category — eleven listings in total, the same corpus behind /best-ai-voice-agents and the site's AI voice agent buyer guide — never a fresh, unverified list assembled for this page. A tool qualifies only if we have already fact-checked its pricing model and sourced its pros, cons and a "best for" call. The order runs from closest-to-furthest from Retell's own developer-first, bring-your-own-provider model: Vapi first, the nearest analog on both audience and architecture; Bland AI next, the direct fix for Retell's own most-cited limitation (stacked, hard-to-predict pricing); ElevenLabs Conversational AI third, a different pricing shape (subscription plus pooled minutes) built around voice quality rather than orchestration flexibility; Synthflow AI fourth, the no-code alternative to Retell's API-first builder; LiveKit Agents fifth, the only open-source and self-hostable pick; and PolyAI last, the furthest departure — a sales-proven enterprise incumbent with a no-code path rather than a developer-first API.
How Retell AI and its alternatives compare
| Feature | Vapivs Retell AI | Bland AI | ElevenLabs Conversational AI | Synthflow AI | LiveKit Agents | PolyAI |
|---|---|---|---|---|---|---|
| Description | The developer platform for voice AI agents, bring your own model, voice and telephony, and Vapi orchestrates the call. | Enterprise voice AI that owns its own model stack, priced all-in per minute with no model pass-throughs. | The voice-quality specialist’s own agent layer, 10,000+ voices and instant cloning, with a bring-your-own-LLM brain. | A no-code voice AI platform for enterprise phone agents — a visual Flow Designer and a structured Build-Evaluate-Launch-Learn deployment cycle, billed by the minute in separate components. | The Apache 2.0 voice-agent framework. 13.1k GitHub stars, self-hostable, and the only open-source pick in this category with fully published pricing. | The pre-LLM-era enterprise voice AI incumbent ($750M-valued, 200+ enterprise customers): sales-led only again after a May 2026 self-serve tier went away. |
| Category | Voice agents | Voice agents | Voice agents, Agent platforms | Voice agents | Voice agents | Voice agents |
| From | $0.05 / min | $0.14/min / minute | $0 / mo | $0.11-$0.16 / min | $0 / month | Custom (per minute, sales-led) |
| Tier | Listed | Listed | Listed | Listed | Listed | Listed |
| API | Yes | Yes | Yes | Yes | Yes | Yes |
| Tags |
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6 alternatives to Retell AI, in detail
Vapi
from $0.05 / minThe developer platform for voice AI agents, bring your own model, voice and telephony, and Vapi orchestrates the call.
Best for Engineering teams that want maximum control to build custom voice agents on their own choice of model, voice and telephony.
The closest developer-first rival — also model-agnostic and billed per minute, with a cheaper $0.05/min orchestration fee than Retell's $0.07-$0.31/min range and genuine enterprise-scale proof (Amazon Ring evaluated 40+ vendors and now routes 100% of its inbound calls through it) — but it leans even further into pure code and API, without Retell's drag-and-drop conversation-flow builder.
Bland AI
from $0.14/min / minuteEnterprise voice AI that owns its own model stack, priced all-in per minute with no model pass-throughs.
Best for Security-conscious enterprises in regulated industries that want a compliant, infrastructure-owned voice platform with deterministic call flows.
Fixes Retell's own most-cited limitation directly: one all-inclusive per-minute rate ($0.11-$0.14) that already bundles the LLM, voice and telephony instead of billing them as stacked components — the trade-off is Bland's proprietary self-hosted stack in place of Retell's bring-your-own-model flexibility.
ElevenLabs Conversational AI
from $0 / moThe voice-quality specialist’s own agent layer, 10,000+ voices and instant cloning, with a bring-your-own-LLM brain.
Best for Developers and product teams who want ElevenLabs' voice quality and cloning as the foundation of their agent, and are comfortable assembling the rest of the stack themselves.
Swaps Retell's pure per-minute billing for subscription tiers with pooled minutes (Free through $990/month Business), built around best-in-class text-to-speech and instant voice cloning across 10,000+ voices — the pick if voice quality matters more than Retell's low-latency turn-taking pitch.
Synthflow AI
from $0.11-$0.16 / minA no-code voice AI platform for enterprise phone agents — a visual Flow Designer and a structured Build-Evaluate-Launch-Learn deployment cycle, billed by the minute in separate components.
Best for Operations and CX teams at mid-market or enterprise companies who want a visual, no-code way to design and launch phone agents without an engineering ticket.
Replaces Retell's API-first, developer-configured builder with a genuinely no-code visual Flow Designer and a named BELL (Build, Evaluate, Launch, Learn) deployment methodology, aimed at ops/CX teams rather than engineers, backed by an unusually complete compliance set (SOC 2, HIPAA, GDPR, PCI DSS, ISO 27001) — the trade-off is Synthflow's narrower, OpenAI-only model choice against Retell's fully bring-your-own-model flexibility.
LiveKit Agents
from $0 / monthThe Apache 2.0 voice-agent framework. 13.1k GitHub stars, self-hostable, and the only open-source pick in this category with fully published pricing.
Best for Engineering 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 genuinely open-source, self-hostable pick in the category (Apache 2.0, 11.5k+ GitHub stars), with a real free tier — 1,000 agent-session minutes a month, no credit card — versus Retell's $10-credit-only trial; the cost is writing and deploying your own agent code instead of using Retell's hosted dashboard and flow builder.
PolyAI
from Custom (per minute, sales-led)The pre-LLM-era enterprise voice AI incumbent ($750M-valued, 200+ enterprise customers): sales-led only again after a May 2026 self-serve tier went away.
Best for Teams that want a proven, enterprise-scale, compliance-certified voice AI vendor with a research-led model roadmap, and are prepared to start with a sales conversation: there is no self-serve or free way to trial it today.
The furthest departure: a pre-LLM-era enterprise incumbent (founded 2017, 200+ named customers, a $750M valuation) shipping SOC 2, HIPAA, GDPR and PCI DSS compliance plus a no-code Poly Agent Builder — sales-led only (a self-serve tier it briefly ran from May 2026 is gone as of an August 2026 re-check), unlike Retell's fully self-serve, sign-up-and-go pricing.
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- Is there a cheaper alternative to Retell AI?
- Vapi's $0.05/min orchestration fee undercuts Retell's $0.07/min starting rate, though both climb once a real LLM and voice are added on top. Bland AI's all-inclusive $0.11-$0.14/min rate is the easiest to budget for, since it already bundles those components instead of billing them separately like Retell and Vapi both do.
- What is the closest alternative to Retell AI?
- Vapi is the closest match — both are developer-first, model-agnostic voice-agent platforms you assemble from your own choice of LLM, voice and telephony provider, billed per minute. The main differences are Vapi's cheaper headline rate and Retell's built-in visual conversation-flow builder and auto-syncing knowledge base.
- Is there a free or open-source alternative to Retell AI?
- LiveKit Agents is the only open-source, self-hostable option among these seven voice-agent platforms — Apache 2.0-licensed with a genuine free tier (1,000 agent-session minutes a month, no credit card). Retell itself has no permanent free tier, just $10 in trial credits.
- Which Retell AI alternative is best for regulated or enterprise deployments?
- PolyAI and Bland AI both lean toward enterprise compliance. PolyAI ships SOC 2, HIPAA, GDPR and PCI DSS out of the box with 200+ named enterprise customers; Bland AI runs its own self-hosted infrastructure specifically to argue for tighter compliance control in regulated industries like healthcare and finance.
- Which Retell AI alternative has the best voice quality?
- ElevenLabs Conversational AI is built around ElevenLabs' own text-to-speech and voice-cloning models, with 10,000+ voices and instant cloning — a different specialty from Retell's proprietary turn-taking model, which is optimized primarily for call latency rather than voice variety.
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