11 Best Retell AI Alternatives for Voice Agents in 2026

Word Count: ~2,800

Retell AI has earned its place as a solid voice AI platform. The low-latency conversations, decent telephony integration, and no-code builder work well for many teams. But there are legitimate reasons to look elsewhere.

Maybe you've hit Retell's pricing ceiling. Their advertised $0.07/min base rate balloons to $0.13-$0.31/min once you add LLM costs, voice providers, and telephony fees. Or perhaps you need more LLM provider options than Retell offers. Maybe you're tired of paying extra for features that should be standard.

Whatever brought you here, I've spent considerable time evaluating these platforms in production environments. This isn't a regurgitated features list—it's what I've actually observed running voice agents across different industries and use cases.

Let's look at your options.

Quick Comparison Table

Pricing verified January 2026. Total costs include typical LLM, TTS, STT, and telephony fees.

1. Burki — Best Overall Value

Platform Fee: $0.03/min Why It's the Top Retell Alternative: 57% cheaper than Retell with comparable (actually better) latency

I'll be upfront—Burki consistently outperforms Retell on the metrics that matter: price, speed, and flexibility. At $0.03/min versus Retell's $0.07/min, you're saving nearly $400/month at just 10,000 minutes of usage.

Verified Pricing

• Platform fee: $0.03 per voice minute
• No bulk minimums (use 1 minute or 1 million at the same rate)
• Free trial: 200 minutes + free phone number for 30 days
• No credit card required to start
• HIPAA compliance included (free BAA)
• SOC 2 Type II certified

Pros

• Lowest platform fee in the market at $0.03/min with no minimums
• 0.8-second average latency versus Retell's ~1.2 seconds
• BYO API Keys mode lets you pay AI providers directly and keep your negotiated rates
• 50+ LLM/TTS/STT provider integrations including OpenAI, Anthropic Claude, Google Gemini, xAI Grok, ElevenLabs, and Deepgram
• IVR Explorer automatically maps existing phone trees into AI assistants (unique feature)
• Three-tier memory system (semantic, episodic, procedural) for genuine caller context across conversations
• Multi-telephony support: Twilio, Telnyx, Vonage, and BYO SIP trunks
• Spam detection with automatic termination of spam calls

Cons

• Smaller community than Vapi (fewer third-party tutorials)
• Newer platform, less brand recognition
• Dashboard can feel overwhelming with so many options

Best For

Startups, SMBs, and any team where cost matters. The 200-minute free trial with no credit card requirement lets you build something real before committing. Healthcare teams especially benefit from the included HIPAA compliance that Retell also offers, but at 57% lower cost.

2. Vapi — Best Developer Community

Platform Fee: $0.05/min Actual Total Cost: $0.15-0.33/min with required services

Vapi was one of the early players in the voice AI space and has built a substantial developer community around the platform. If you're looking for tutorials, Stack Overflow answers, and agencies familiar with the tech, Vapi has more of that ecosystem than most alternatives.

Verified Pricing

• Base platform fee: $0.05/min
• Real-world costs typically reach $0.15-0.33/min with LLM, TTS, and STT
• Free trial: ~60 minutes at signup
• HIPAA compliance: $1,000/month add-on
• Enterprise plans: $3,000-6,000/month typical
• Pay-as-you-go limited to 10 concurrent calls

Pros

• Large developer community with extensive documentation
• Good starter templates for common use cases
• Straightforward onboarding for simple agents
• Solid integrations ecosystem

Cons

• 4-5 second average latency — significantly slower than Retell and Burki
• HIPAA costs $1,000/month extra
• No BYO API key option
• 10 concurrent call limit on standard plans

Best For

Developers new to voice AI who want to learn from community examples. Teams with budget flexibility who prioritize ecosystem over cost.

3. Synthflow — Best No-Code Builder

Platform Fee: $0.08-0.12/min (varies by plan) Monthly Plans: $29-$1,400/month

Synthflow positions itself as the visual builder alternative. If your team includes non-technical operators who need to edit conversation flows without touching code, Synthflow's approach might click better than Retell's developer-oriented interface.

Verified Pricing

• Starter: $29/month (50 minutes included)
• Pro: $450/month (2,000 minutes, 25 concurrent calls)
• Growth: $900/month (4,000 minutes, 50 concurrent calls)
• Agency: $1,400/month (6,000 minutes, white-label platform)
• Enterprise: Custom pricing from $0.08/min
• Overages: $0.12-0.13/min depending on plan

Pros

• Visual workflow builder designed for non-developers
• Real-time CRM updates mid-call
• White-label options for agencies
• 14-day free trial on paid plans

Cons

• Higher per-minute costs than Burki or Vapi
• Minutes included in plans may not match your usage patterns
• Complex pricing tiers to navigate

Best For

Agencies building voice agents for clients, teams without dedicated developers, operations managers who need to iterate on flows independently.

4. Bland AI — Best for Outbound Campaigns

Platform Fee: $0.09/min Minimum Charge: $0.015 per outbound attempt

Bland AI focuses on outbound calling at scale. If your primary use case is campaigns—cold outreach, appointment reminders, collections—Bland's infrastructure is optimized for that pattern.

Verified Pricing

• Voice calls: $0.09/min (billed per second)
• Minimum charge: $0.015 per failed/short call
• SMS: $0.02/message
• Transfers: $0.025/min on Bland numbers (free with your own Twilio)
• Plans: Build ($299/mo), Scale ($499/mo) with daily call caps

Pros

• Optimized for high-volume outbound
• Per-second billing (no rounding up)
• BYOT (Bring Your Own Twilio) eliminates transfer fees

Cons

• Higher base rate than Burki, Vapi, and Retell
• Minimum charge on every outbound attempt adds up
• Recent pricing increase (Scale plan went from $0.09 to $0.11/min)

Best For

Sales teams, appointment reminder systems, debt collection, and any high-volume outbound operation where call completion rates matter more than per-minute cost.

5. PolyAI — Enterprise-Only Alternative

Pricing: Custom quotes, typically $150K+/year

PolyAI isn't competing in the same space as Retell—it's targeting large enterprise contact centers with full-service deployments. If you're evaluating $100K+ annual budgets, PolyAI belongs on your list.

Verified Pricing

• Entry-level: ~$5,000-10,000/month (single department pilots)
• Mid-tier: ~$10,000-20,000/month (multi-department)
• Enterprise: $30,000+/month ($150K+/year typical)
• Implementation: $20,000-100,000 one-time
• No public pricing or self-serve option

Pros

• Best-in-class voice quality for enterprise
• Dedicated account management and support
• Designed for high-volume contact center operations
• Strong compliance posture

Cons

• No self-serve option—must go through sales
• Pricing makes it inaccessible for most businesses
• Annual or multi-year commitments typical
• Overkill for smaller deployments

Best For

Large enterprises with existing contact center budgets, companies processing millions of calls annually, organizations that need managed service rather than platform.

6. ElevenLabs Conversational AI — Best Voice Quality

Platform Fee: $0.10/min Focus: Premium voice synthesis with agent capabilities

ElevenLabs built its reputation on voice quality. Their conversational AI product brings that same voice technology to interactive agents, though at a premium price point.

Verified Pricing

• Conversational AI: $0.10/min base
• Testing calls: Half price during setup
• Business plan: $1,320/month (~13,750-22,000 TTS minutes)
• Free tier: 10,000 characters/month (~3-4 minutes)

Pros

• Industry-leading voice quality and realism
• Strong voice cloning capabilities
• Good for voice-first experiences where quality matters most

Cons

• Higher cost than Retell and most alternatives
• Credit-based pricing can get expensive
• Hidden costs for HIPAA, premium features
• Less telephony infrastructure focus

Best For

Use cases where voice quality directly impacts outcomes—luxury customer service, healthcare, education, entertainment. Not ideal for high-volume cost-sensitive deployments.

7. Air AI — Enterprise Sales Automation

Pricing: $25,000-100,000 upfront + $0.11-0.32/min

Air AI positions as the enterprise AI sales agent—capable of extended conversations (10-40 minutes) with human-like memory and context. But the pricing reflects that enterprise positioning.

Verified Pricing

• Upfront license: $25,000-100,000 (negotiable)
• Outbound calls: $0.11/min
• Inbound/API calls: $0.32/min
• Additional telephony costs via Twilio
• No free trial or public sandbox

Pros

• Extended conversation capability (40+ minutes)
• Strong context and memory within conversations
• Enterprise-grade features

Cons

• Massive upfront commitment required
• No way to test before significant investment
• Closed pricing model
• Only makes sense at enterprise scale

Best For

Large sales organizations automating complex, lengthy sales conversations. Not appropriate for startups or teams without $25K+ to commit upfront.

8. Voiceflow — Best for Multi-Channel

Pricing: Credit-based, $0.005/credit Plans: Free, Pro ($60/mo), Enterprise

Voiceflow started as a chatbot builder and expanded into voice. If you need both chat and voice agents sharing logic, Voiceflow's unified approach might simplify your stack.

Verified Pricing

• Free: 100 credits/month, 2 agents
• Pro: $60/month for 1 editor, 10,000 credits, 20 agents
• Enterprise: Custom pricing, unlimited agents
• Voice agents consume more credits than chat

Pros

• Chat + voice in one platform
• Visual conversation builder
• No separate AI vendor accounts needed
• Supports OpenAI, Claude, Gemini, Llama, DeepSeek

Cons

• Credit system can become expensive at scale
• Agents stop responding when credits depleted
• Voice is secondary to chat focus
• Limited telephony integration depth

Best For

Teams building both chat and voice experiences who want a unified platform. Less suitable for voice-only, high-volume deployments.

9. Smallest.ai — Enterprise Contact Center Focus

Pricing: Custom enterprise quotes

Smallest.ai targets enterprise contact centers with a full-stack solution built for high-volume operations. Their sub-100ms latency claims (via Lightning V2 TTS) position them as the speed leader.

Verified Pricing

• Per phone number: $10/month
• Per-minute pricing: Contact sales
• On-premises deployment available
• HIPAA, SOC 2, GDPR, ISO 27001 compliant

Pros

• Claims sub-100ms latency
• Private cloud/on-premises deployment options
• Multilingual voice agents
• Enterprise compliance coverage

Cons

• No public pricing
• Requires sales engagement
• Less accessible for smaller teams

Best For

Enterprise contact centers, regulated industries needing on-premises deployment, organizations prioritizing latency above all else.

10. Cognigy — Large Enterprise Platform

Pricing: Starting $2,500/month, enterprise $300K+/year

Cognigy.AI is built for large enterprises that need sophisticated AI automation across multiple channels with deep backend integration. It's powerful but comes with complexity and pricing to match.

Verified Pricing

• Starting: $2,500/month
• Enterprise contracts: Often above $300K/year
• Voice Gateway: Separate license required
• Concurrent line packages with overage charges

Pros

• Deep enterprise integration capabilities
• Voice and chat in unified platform
• Strong banking, healthcare, telecom presence
• Dedicated support and onboarding

Cons

• Enterprise pricing and complexity
• Requires dedicated implementation resources
• Voice is add-on, not core focus
• Overkill for most use cases

Best For

Large enterprises in banking, healthcare, or telecom with high interaction volumes and internal teams capable of managing complex implementations.

11. PlayHT — Best for Content Creators

Pricing: Free tier, paid from $39/month

PlayHT approaches voice AI from a text-to-speech angle. Their voice agent capabilities are newer but could work for simpler use cases, especially if you're already using their TTS for other content.

Verified Pricing

• Free: 12,500 characters/month, 1 voice clone
• Paid plans: Starting $39/month
• Unlimited plan: Unlimited characters, commercial rights
• Student/educator discount: 20%

Pros

• 900+ AI voices available
• Strong TTS quality
• Free tier for testing
• Voice cloning included

Cons

• Voice agents are secondary to TTS focus
• Less sophisticated conversation management
• Limited telephony infrastructure
• Refund policy restrictive (24 hours, under 5K characters)

Best For

Content creators, podcasters, and video producers who want simple voice agent capabilities alongside their existing PlayHT TTS usage.

FAQ

Why switch from Retell AI?

The main reasons I see teams migrate from Retell: cost (Retell's $0.07/min is 133% more than Burki's $0.03/min), provider flexibility (Retell limits which LLMs and voice providers you can use), and total cost of ownership (Retell's real-world costs often reach $0.13-0.31/min once you add all components). If any of those pain points resonate, explore alternatives.

What's the cheapest Retell alternative?

Burki at $0.03/min is the cheapest platform fee with no bulk minimums. Some platforms advertise low rates but require minimum purchases—Burki doesn't. You pay the same $0.03/min whether you use 10 minutes or 100,000 minutes.

Which alternative has the best latency?

Burki (0.8s) and Smallest.ai (claims sub-100ms) lead on latency. Retell averages around 1.2 seconds, which is decent. Avoid Vapi if latency matters—their 4-5 second response times are noticeably slower.

Do any alternatives include HIPAA compliance for free?

Burki and Retell both include HIPAA compliance at no extra charge with BAA available. Vapi charges $1,000/month for HIPAA, which effectively doubles their cost for healthcare use cases.

Can I port my phone numbers from Retell?

Yes, standard number porting works across all major platforms. Burki also supports BYO SIP trunks if you want to keep your existing telephony infrastructure entirely separate.

Verdict: Which Retell Alternative Should You Choose?

For most teams, Burki is the obvious choice. You get 57% lower platform fees, better latency, more provider options, and features like IVR Explorer that Retell doesn't offer. The 200-minute free trial with no credit card requirement lets you validate the platform before committing anything.

Choose Burki if: Cost matters, you want provider flexibility, you need HIPAA included, or you're replacing legacy IVR systems.

Choose Vapi if: You value developer community and don't mind paying more for ecosystem benefits.

Choose Synthflow if: Your team needs visual no-code tools and you're building for clients.

Choose Bland AI if: Outbound campaigns are your primary use case.

Choose PolyAI or Cognigy if: You're a large enterprise with $150K+ annual budgets and need managed services.

For the 80% of teams looking at Retell alternatives, start with Burki's free trial. Build something, test it with real calls, and see if it meets your needs. If it works—and for most use cases it will—you've just cut your voice AI costs by more than half.

Last updated: January 2026

Pricing information sourced from official websites, G2, and industry reports as of January 2026. Pricing and features change frequently—verify current information before making decisions.

Sources: [Retell AI Pricing](https://www.retellai.com/pricing), [Vapi Pricing](https://vapi.ai/pricing), [Synthflow](https://synthflow.ai/), [Bland AI Billing](https://docs.bland.ai/platform/billing), [PolyAI Pricing](https://poly.ai/pricing/), [ElevenLabs Pricing](https://elevenlabs.io/pricing), [Voiceflow Pricing](https://www.voiceflow.com/pricing), [G2 Reviews](https://www.g2.com)