Retell AI Alternatives and Competitors in 2025

If you’ve ever been stuck on a call with something that sounds like voice was modelled on Johnny 5, you’ll know why companies started experimenting with tools like Retell AI.

The brand captured a lot of attention in the market early on with its natural-sounding voices, flexible API-first design, and omnichannel reach.

But for all its flexibility, Retell has trade-offs. It wasn’t made for those of us without coding knowledge, and it lacks things like “persistent memory”, that keeps conversations feeling consistent (and human). Plus, enterprise-grade controls (like RBAC and role-specific access), are missing.

Retell AI might still be great for developer-heavy teams, but plenty of operators now prefer Retell AI alternatives that launch faster, require no code, and keep costs predictable as call minutes climb.

Here, we’ll share our genuine opinions on some of the top competitors, and what they actually do best.

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Why People Explore Alternatives to Retell AI

Retell AI has a lot going for it. The AI voice agents sound natural, the latency is low, and the developer tools are impressive. But that’s also the problem, Retell was built for developers first, not the everyday ops manager who just wants to launch a voice agent without touching code.

Here’s what we hear most often from teams that switch:

Developer-heavy setup‍

Retell calls itself “low-code,” but that still means you’ll need engineering help for every flow edit, CRM integration, or prompt adjustment. Great for builders; frustrating for busy operations teams.

Response latency‍

Retell can handle a handful of calls no problem. But if your contact numbers start to grow, the AI can stumble.

Integration overhead‍

It can connect to Twilio, HubSpot, Salesforce, and more, but only after someone configures those APIs. Plug-and-play isn’t its forte.‍

Cost creep

The pay-as-you-go model looks transparent, yet costs stack fast once you factor in voice minutes, LLM usage, and telephony. Predictable budgets are hard when each layer bills separately

Limited guardrails‍

There’s no visual sandbox for testing or no-code “safe mode” to let non-technical users experiment. One mistake in a prompt can derail a call.

Scaling pain‍

Managing multiple brands or clients in Retell means juggling accounts manually; there’s no real multi-tenant dashboard for BPOs or agencies.

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What Actually Matters in a Voice-AI Platform

We like to think we know more than most about voice AI. After all, we built our own system. But often, a lot of companies shopping for the best Retell AI alternatives aren’t sure where to start. They might know they want human-like voice agents and predictable pricing, but that’s it.

Honestly, what matters most is finding the system that works for you. One that actually survives Monday morning traffic, gives you that customization freedom you so desperately need, and integrates with all the right channels.

Here’s what people who’ve been through those fire drills actually care about:

How natural the voice really sounds: Even a slight pause is enough for someone to realize they’re talking to a bot. The strongest providers close that gap by keeping their speech models and telephony stack in the same data center, and letting you customize the tone, cadence, and style of voice interactions or chatbots.

How fast you can go live: If every prompt edit needs a developer, you’ve already lost your agility. Low code doesn’t mean no-code. The teams winning now are the ones that can drag a few blocks, test, and ship a new flow before the next shift change.

What the agent can actually do mid-call: Booking a slot, updating a CRM record, sending a confirmation, all those small actions make the difference between a “bot” and a real digital teammate. Platforms with Custom Actions are built for that.

Integrations that behave: You shouldn’t need three Zapier chains just to sync with HubSpot or your calendar. Clean APIs save hours of debugging.

Pricing you can actually predict. Per-minute or usage-based is fine if it’s clear. Surprise line items at the end of the month are not.

Security that keeps your compliance team calm: SOC 2, HIPAA, GDPR, no shortcuts, no vague promises.

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Meet the Best Retell AI Alternatives and Competitors

Once you know what really matters, the question becomes: who’s actually doing it right? The Voice AI market has grown crowded with tons of names, from Deepgram, to Elevenlabs. It’s easy to get lost in glossy demos and half-explained pricing. The good news? A handful of platforms have figured out how to balance quality, flexibility, and cost in the real world. 

Synthflow: The Best Retell AI Alternative

We built Synthflow because we’d spent years wrestling with the same problems our customers face. Setting up voice AI shouldn’t require an engineering team, yet most systems still do. The first time we tested our own Elastic SIP infrastructure, it was clear why that mattered. By owning the telephony layer instead of renting it from third parties, we cut latency to a fraction of what we were seeing elsewhere. The difference is immediate, conversations feel fluid, not robotic.

Setting up an agent takes minutes. We use our own drag-and-drop builder daily, and it’s the same one every customer gets. You can design inbound and outbound call flows, connect CRMs, or build actions that pull live data for all kinds of use cases without writing a single line of code.

The Custom Actions feature was also built from our own frustration with complex integrations. Now, updating a record in Salesforce or sending a booking confirmation mid-call is one click, not a development sprint.

Key Strengths

Where It Falls Short: If you’re running thousands of automated outbound dials per hour, you may still want a dialer-first system. We focus on quality, not sheer call volumes.

Pricing: Our model is straightforward: predictable, low-cost per-second billing with no hidden fees. Volume bundles keep costs stable as you scale, and a free trial lets you test before you commit.

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Vapi: Best Developer-Friendly Retell AI Alternative

We’ve spent a lot of time testing Vapi, and it’s easy to see why developers love it. It’s flexible, powerful, and open. You can pick your own LLM, TTS, and STT models, tweak latency thresholds, add knowledge base docs, and even swap providers on the fly.When we built a few test agents, the setup felt closer to a full development environment than a traditional Voice AI platform, and that’s exactly the appeal.We built a small support agent in Vapi to see how fast it could go from API call to live phone line. The first call connected quickly, though latency for concurrent calls fluctuated depending on which TTS engine we used. That’s both the beauty and the trade-off of Vapi, total freedom, but total responsibility.

Key Strengths

• Easy to fine-tune and developer-friendly
• Works with multiple LLM, STT, and TTS providers
• Excellent voice quality control
• Straightforward pay-as-you-go pricing
• Decent security and compliance

Where It Falls Short

• Advanced features restricted to enterprise plans
• Still requires some developer knowledge for workflow automation

Pricing

Vapi starts around $0.05 per minute, plus model and AI phone provider costs. There’s no minimum, making it easy to experiment before committing.

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Bland AI

We tested Bland AI agents across multiple environments: inbound, outbound, and even a mock healthcare scenario, to see how it handled compliance and call control. It’s clear Bland was designed with enterprise governance in mind. The system logs everything, from conversation transcripts to model responses, and the audit tools are excellent.Where Bland stands out is stability. Even during heavy outbound loads, call quality stayed consistent.

Its memory layer lets the AI reference previous calls, which makes scaling multi-step interactions feel smoother than most competitors.But that reliability comes with complexity. Setting up custom logic for AI agents still requires developer time, and the outbound minimum-call charge adds up fast if your campaigns include short or failed calls.

Key Strengths

• SOC 2 and HIPAA compliance baked in
• Omnichannel support for SMS
• Reliable under high call volumes
• Memory layer for multi-call context
• Actual drag-and-drop builder for AI automation

Where It Falls Short

• Latency of up to 800ms
• Lacks no-code setup

Pricing

At the time of testing:

• Calls were around $0.09 per minute
• $0.015 minimum per outbound call, even for short or unanswered calls

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PolyAI

We’ve always respected what PolyAI does. When we first tested it, the voice quality honestly caught us off guard. It’s so smooth that even seasoned contact center managers couldn’t tell it was synthetic. PolyAI clearly invests heavily in its speech models you can hear it in the seamless cadence and tone.

We tested PolyAI using a high-volume customer service scenario with multilingual calls. The response times stayed tight, and the speech never felt forced or robotic. It’s the closest we’ve heard to a “human-first” AI customer experience. But it’s also clear that PolyAI is a managed enterprise platform, not a self-serve tool. Setting up new workflows usually means working with their team, and that adds a layer of process (and cost).

If you’ve got scale, budget, and a dedicated technical contact, PolyAI delivers elite quality. For smaller teams, it’s overkill.

Key Strengths

• Ultra-low latency and lifelike AI phone agents
• Excellent onboarding and enterprise service
• Native CRM and CCaaS integrations
• Built for complex call flows and large-scale CX

Where It Falls Short

• Pricing isn’t public; all quotes go through the sales team
• Deployment can be complicated for small teams

Pricing

PolyAI charges per minute, with enterprise maintenance and support included. A custom quote must be obtained directly from their sales team.

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Replicant

When we tested Replicant, it felt different from most Retell alternatives. It doesn’t try to be a “do-everything” platform for building AI. Instead, it focuses on solving and closing calls:  what they call “resolution-first” automation.

We ran it through several test calls for order tracking, returns, sending appointment reminders, and basic support triage. The conversations were clean, direct, and efficient: exactly what a busy contact center needs.

Replicant also shines in analytics. The platform records and categorizes every outcome, making it easy to see where customers get stuck in real-time. That said, Replicant is clearly built for enterprise scale. Setup involves professional onboarding, and pricing depends on volume and integration scope.

Key Strengths

• Resolution-first AI focused on measurable outcomes
• Detailed analytics and conversational insights
• Proven scalability across large-scale contact centers
• Multi-language support
• Strong compliance and security standards

Where It Falls Short

• Long deployment and setup times
• No flat-rate pricing model

Pricing

Replicant uses a pay-as-you-go enterprise model, but pricing details are private. Expect custom quotes based on minutes and automation volume.

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Goodcall

When we tested Goodcall, it immediately felt built for small teams without an IT department. Compared to Retell, it is a world apart. The interface is straightforward, with pre-built templates that help anyone build basic voice bots.

We built a quick phone agent for a dental practice scenario, handling appointments, cancellations, and hours. It took about fifteen minutes to get it answering calls and transferring to voicemail after hours.

The AI voice is friendly and clear, not hyper-realistic, but perfectly fine for small-business use. The bigger win is how it fits into real workflows. Goodcall integrates with Google Calendar and handles basic CRM tasks.

Key Strengths

• True no-code setup for non-technical users
• Easy, programmable workflows for follow-up and appointment booking
• Predictable pricing with a 14-day trial
• Simple integrations with business tools

Where It Falls Short

• Limited customization; deep call logic modifications are not possible
• Not designed for enterprise-scale automation

Pricing

• Free demo and 14-day trial available
• Paid plans start at $66 per month, varying by call volume and features

Talkie AI

Talkie AI is tailored for healthcare workflows. We tested it with a mock primary care office scenario, handling prescription checks, appointment bookings, and insurance inquiries.

Setup was fast, manageable within an hour. Your test agent could route calls, pull scheduling data, and respond in multiple languages. The real differentiator is healthcare compliance. Every part of the workflow prioritizes privacy, consent, and patient-friendly phrasing.

Flexibility for non-medical tasks is limited, but it handles most healthcare needs, from waitlist management to IVR replacement.

Key Strengths

• Simple platform solution for automated customer support
• HIPAA-ready and healthcare-focused
• Handles appointment scheduling and prescription refills smoothly
• Supports multilingual interactions
• Quick implementation with predictable pricing

Where It Falls Short

• Limited flexibility for non-medical use cases
• Smaller library of integrations compared to general-purpose platforms

Pricing

• Pricing is not publicly listed
• Plans are predictable and based on call volume. Contact the team for details

Cognigy

Cognigy is a full Conversational AI Platform (CAIP) designed for enterprise-scale automation, not plug-and-play. It is ideal if you want a copilot, bot, or voice agent that integrates with complex contact center workflows.

When testing Cognigy.AI and its Voice Gateway, we built a voice bot and matching chat flow. Handoff between channels was flawless. Customers could start on chat and finish on the phone without losing context. The flow editor is powerful and collaborative, but has a steep learning curve.

Cognigy is not cost-effective for small teams, but excels in agentic control, governance, and workflow orchestration.

Key Strengths

• Deep governance and workflow orchestration on a single platform
• Multi-channel automation (voice, chat, messaging)
• Strong analytics and collaboration tools
• Trusted by large enterprises and contact centers

Where It Falls Short

• Too complex for most small and medium-sized businesses
• Pricing and licensing require direct engagement with sales

Pricing

• Enterprise pricing is based on conversations, concurrent lines, and knowledge-graph usage
• Designed for scale, not startup

Retell AI Alternatives: Quick Comparison Table

After testing each of these Retell AI alternatives in real scenarios, from handling inbound support queues to managing high-volume outbound calls, here’s what we ended up with:

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Retell AI Alternatives: Why Synthflow Is the Right Choice

After testing every major Retell alternative, one thing became clear: most platforms force you to choose between simplicity and control. We built Synthflow so you wouldn’t have to.

When we started working on Synthflow, we weren’t trying to make “just another AI voice platform.” We were trying to fix the exact problems we’d hit in production: slow setup, unpredictable latency, and billing that felt like a math test. So we built what companies need from the ground up:

• Real-time voice that feels human, with no robotic delay
• Build and update agents visually, with no engineering bottleneck
• Perform real work mid-call: CRM updates, bookings, payments
• Works with your existing CCaaS and carriers
• Transparent, per-second pricing that scales cleanly
• SOC 2, HIPAA, and GDPR options for regulated industries
• Fast, human support from experts who actually use the platform daily

We don’t believe in “one-size-fits-all AI.” We believe in tools that adapt to how real teams operate: fast, flexible, and always reliable. That’s what makes Synthflow the most practical, production-ready choice

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Conclusion

After spending weeks testing and comparing Retell alternatives, the takeaway isn’t that one platform does everything perfectly, it’s that most of them do one thing really well. Poly AI sets the standard for human agent style voice realism. Vapi matches Retell AI’s customization capabilities. Cognigy give you open-source freedom, and so on.

But if you’re building for the middle ground, where quality, speed, and usability all have to coexist, that’s exactly where Synthflow fits. We designed it for teams that want production-ready Voice AI without the buildout overhead, latency surprises, or runaway billing.

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Retell AI Alternatives: FAQs

Which platform has the most natural voice quality?

If pure realism is your top priority, PolyAI leads that race, its voices sound remarkably human, even in long conversations. Retell AI and Synthflow both rank high for responsiveness and tone, while Goodcall and Talkie AI use lighter models that trade some realism for faster deployment and affordability.
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Are all these tools no-code?

Not quite. Goodcall, Talkie AI, and Synthflow are truly no-code. Vapi and Bland AI require technical knowledge to configure APIs or model connections. Cognigy and PolyAI sit somewhere in the middle with visual builders, but deep enterprise complexity underneath.
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How predictable are the pricing models?

It depends on how you scale. Synthflow and Goodcall use clear per-minute or per-second billing. Vapi passes through multiple provider costs, so invoices can vary. PolyAI, Replicant, and Cognigy quote custom enterprise pricing, expect a discovery call before you see numbers.

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