Best Retell AI Alternatives in 2026 (8 Platforms Compared)

A Retell AI alternative is a voice agent platform that answers and places phone calls using speech recognition, a language model and synthesized speech. Retell AI is a developer platform for building voice agents, priced at $0.08 per minute as of October 2026 according to its pricing page.

Retell AI offers low-latency voice infrastructure and flexible API control, which suits engineering teams building custom voice workflows. This article covers eight alternatives, divided between no-code builders for operations teams, developer platforms with different pricing models, enterprise customer-service platforms and open-source frameworks.

What are the best Retell AI alternatives in 2026?

The alternatives covered are Vapi, Bland AI, Synthflow, Thoughtly, PolyAI, Cognigy, LiveKit and Pipecat. The main dividing line is build model: Vapi, Bland AI, LiveKit and Pipecat are developer platforms or frameworks that need code, while Synthflow, Thoughtly, PolyAI and Cognigy offer no-code or low-code builders and enterprise support. Developer teams prioritizing API control and per-minute pricing fit the first group. Operations teams, agencies and enterprises needing pre-built integrations and managed services fit the second.

Pricing checked October 2026. Sources linked in each vendor section.

Why do teams look for a Retell AI alternative?

Teams look for a Retell AI alternative for five reasons.

Pricing model. Retell AI charges $0.08 per minute according to its pricing page, which can become expensive at high call volumes. Teams running thousands of minutes per month may prefer a platform with volume discounts or a flat monthly rate.

Build effort. Retell AI is an API-first platform that needs code to configure agents, which does not suit operations teams or agencies without in-house developers.

Use-case fit. Retell AI's documentation focuses on general-purpose voice agents. Teams needing pre-built workflows for specific industries (healthcare scheduling, real estate lead qualification) may prefer a platform with vertical templates.

Integrations. Retell AI's integration library is smaller than some competitors'. Teams needing native connectors to Salesforce, HubSpot or electronic health record systems may find alternatives with broader pre-built integrations.

Compliance requirements. Retell AI offers SOC 2 Type II certification according to its security page, but teams needing HIPAA business associate agreements or PCI DSS compliance may need an enterprise platform with those certifications documented.

Retell AI offers low latency (reportedly sub-800ms response times according to third-party sources) and flexible API control, which suits engineering teams building custom voice workflows where speed and control are priorities.

Retell AI vs Vapi at a glance

Sources: Retell AI pricing, Retell AI security, Vapi pricing, Vapi docs.

Retell AI is the closer fit for teams prioritizing sub-second latency in voice interactions, because its infrastructure is optimized for speed according to third-party sources. Vapi is the closer fit for teams prioritizing per-minute cost, because its published rate is 37.5% lower and it offers comparable API flexibility according to its documentation.

1) Vapi

Vapi is a developer platform for building voice agents, priced at $0.05 per minute according to its pricing page as of October 2026. Vapi supports inbound and outbound calls over Twilio, Vonage or its own Vapi Phone service, and integrates with 6,000+ apps via Make and Zapier according to its documentation. Vapi suits developer teams prioritizing per-minute cost and integration breadth.

Best for: Developer teams building voice agents with tight per-minute budgets and needing pre-built integrations to CRMs, help desks and marketing tools.

Key capabilities

• WebRTC and SIP telephony for inbound and outbound calls, according to Vapi's documentation.
• Custom function calling to trigger actions in external systems mid-call, according to Vapi's function-calling guide.
• Support for OpenAI, Anthropic and custom language models, according to Vapi's model configuration docs.
• Conversation analytics dashboard with call transcripts and sentiment analysis, according to Vapi's analytics page.
• 6,000+ app integrations via Make and Zapier, according to Vapi's integrations page.

Pricing

Vapi charges $0.05 per minute, which includes telephony, speech-to-text, the language model and text-to-speech according to its pricing page as of October 2026. The pricing page does not specify volume discounts. A free tier offers 10 minutes per month for testing.

Limitations

Vapi's documentation does not list native integrations to Salesforce, HubSpot or electronic health record systems. Teams needing those connections must build them via Make, Zapier or custom API calls. Vapi does not publish HIPAA business associate agreement availability; teams in healthcare should confirm compliance requirements with Vapi's sales team. Vapi's latency is not documented on its public pages; teams prioritizing sub-second response times should test before committing.

How it compares with Retell AI

Vapi's per-minute rate is 37.5% lower than Retell AI's published price, which makes Vapi the closer fit for teams running high call volumes. Retell AI reportedly offers lower latency according to third-party sources, which makes it the closer fit for teams where sub-second response time is the priority.

2) Bland AI

Bland AI is a developer platform focused on outbound sales calls, priced at $0.09 per minute according to its pricing page as of October 2026. Bland AI offers campaign management tools for scheduling and tracking outbound calls at scale, and integrates with CRMs via API according to its documentation. Bland AI suits sales teams running high-volume outbound campaigns.

Best for: Sales teams and agencies running outbound lead qualification, appointment setting and follow-up campaigns at scale.

Key capabilities

• Outbound campaign management with scheduling, retry logic and call-outcome tracking, according to Bland AI's campaign docs.
• Dynamic variable injection to personalize scripts with lead data from CRMs, according to Bland AI's personalization guide.
• Call transfer to human agents when the AI detects a qualified lead, according to Bland AI's transfer docs.
• Webhook callbacks to log call outcomes in external systems, according to Bland AI's webhook guide.
• Support for OpenAI and Anthropic language models, according to Bland AI's model configuration page.

Pricing

Bland AI charges $0.09 per minute, which includes telephony, speech-to-text, the language model and text-to-speech according to its pricing page as of October 2026. The pricing page does not specify volume discounts. A free trial offers 10 test calls.

Limitations

Bland AI's pricing is 12.5% higher than Retell AI's published rate, which may be a concern for teams with tight per-minute budgets. Bland AI's documentation focuses on outbound sales use cases; teams needing inbound customer-service workflows may find fewer pre-built templates. Bland AI does not publish HIPAA or PCI DSS compliance certifications; teams in regulated industries should confirm compliance with Bland AI's sales team.

How it compares with Retell AI

Bland AI offers campaign management and lead-tracking tools that Retell AI does not document, which makes Bland AI the closer fit for sales teams running structured outbound campaigns. Retell AI's per-minute rate is 11% lower and its API is more general-purpose, which makes it the closer fit for teams building custom inbound and outbound workflows beyond sales.

3) Synthflow

Synthflow is a no-code voice agent builder priced from $29 per month according to its pricing page as of October 2026. Synthflow offers a drag-and-drop interface for building call flows, pre-built integrations to CRMs and calendar tools, and hosted telephony according to its documentation. Synthflow suits operations teams and agencies without in-house developers.

Best for: Operations teams, small businesses and agencies needing to build and deploy voice agents without writing code.

Key capabilities

• Drag-and-drop call-flow builder with conditional branching and variable logic, according to Synthflow's builder docs.
• Pre-built integrations to Google Calendar, HubSpot, Salesforce and Zapier, according to Synthflow's integrations page.
• Hosted telephony with inbound and outbound calling included in all plans, according to Synthflow's telephony docs.
• Call recording and transcript export, according to Synthflow's analytics page.
• Multi-language support for English, Spanish, French and German, according to Synthflow's language docs.

Pricing

Synthflow's Starter plan costs $29 per month and includes 30 minutes of calls, according to its pricing page as of October 2026. The Pro plan costs $99 per month and includes 200 minutes. Additional minutes cost $0.15 per minute on the Starter plan and $0.10 per minute on the Pro plan. The pricing page states that telephony, speech-to-text, the language model and text-to-speech are included.

Limitations

Synthflow's per-minute overage rate ($0.10 to $0.15) is higher than Retell AI's flat rate, which makes Synthflow more expensive for teams running more than 200 minutes per month. Synthflow's no-code builder limits customization compared to an API; teams needing complex conditional logic or custom integrations may find the drag-and-drop interface restrictive. Synthflow does not publish SOC 2, HIPAA or PCI DSS compliance certifications; teams in regulated industries should confirm compliance with Synthflow's sales team.

How it compares with Retell AI

Synthflow's no-code builder makes it the closer fit for operations teams without developers, because it needs no API integration or code. Retell AI's API and lower per-minute rate make it the closer fit for engineering teams building custom workflows at scale.

4) Thoughtly

Thoughtly is a no-code voice agent builder priced from $99 per month according to its pricing page as of October 2026. Thoughtly offers a visual call-flow editor, hosted telephony and pre-built templates for appointment scheduling, lead qualification and customer support according to its documentation. Thoughtly suits small businesses needing fast setup without technical resources.

Best for: Small businesses and solo operators needing to deploy a voice agent in under an hour without hiring developers.

Key capabilities

• Visual call-flow editor with pre-built templates for common use cases, according to Thoughtly's builder docs.
• Hosted telephony with a dedicated phone number included, according to Thoughtly's telephony page.
• Calendar integrations to Google Calendar and Calendly for appointment booking, according to Thoughtly's integrations docs.
• Call transcripts and analytics dashboard, according to Thoughtly's analytics page.
• Email and SMS notifications when calls complete, according to Thoughtly's notifications docs.

Pricing

Thoughtly's Basic plan costs $99 per month and includes 100 minutes of calls, according to its pricing page as of October 2026. The Pro plan costs $299 per month and includes 500 minutes. Additional minutes cost $0.20 per minute on the Basic plan and $0.15 per minute on the Pro plan. The pricing page states that telephony, speech-to-text, the language model and text-to-speech are included.

Limitations

Thoughtly's per-minute overage rate ($0.15 to $0.20) is 87.5% to 150% higher than Retell AI's flat rate, which makes Thoughtly significantly more expensive for teams running more than 500 minutes per month. Thoughtly's documentation does not list integrations to Salesforce, HubSpot or electronic health record systems; teams needing those connections must use Zapier or custom webhooks. Thoughtly does not publish SOC 2, HIPAA or PCI DSS compliance certifications; teams in regulated industries should confirm compliance with Thoughtly's sales team.

How it compares with Retell AI

Thoughtly's pre-built templates and visual editor make it the closer fit for small businesses needing to deploy a voice agent in under an hour without technical resources. Retell AI's API and lower per-minute rate make it the closer fit for engineering teams building custom workflows at higher volumes.

5) PolyAI

PolyAI is an enterprise customer-service platform that uses voice agents to handle inbound support calls in 14+ languages, according to its homepage. PolyAI does not publish pricing; the platform needs a sales quote. PolyAI suits enterprises with complex IVR replacement needs and multi-language support requirements.

Best for: Enterprises replacing legacy IVR systems with AI voice agents that handle multi-language customer service at scale.

Key capabilities

• Multi-language support for 14+ languages including English, Spanish, Mandarin, French and German, according to PolyAI's language page.
• Pre-built integrations to contact-center platforms including Genesys, Five9 and Amazon Connect, according to PolyAI's integrations page.
• Call transfer to human agents with context passed to the agent, according to PolyAI's transfer docs.
• Real-time analytics dashboard with call-containment rates and customer-satisfaction scores, according to PolyAI's analytics page.
• SOC 2 Type II and ISO 27001 certifications, according to PolyAI's security page.

Pricing

PolyAI does not publish pricing on its website. According to its homepage, the platform needs a custom quote based on call volume, language requirements and integration complexity. Teams should contact PolyAI's sales team for a quote.

Limitations

PolyAI's enterprise focus and custom pricing make it a poor fit for small businesses or teams needing transparent per-minute rates. PolyAI's documentation does not specify whether the platform supports outbound calls; teams needing outbound campaigns should confirm with PolyAI's sales team. PolyAI does not publish HIPAA business associate agreement availability; teams in healthcare should confirm compliance requirements with PolyAI's sales team.

How it compares with Retell AI

PolyAI's multi-language support and contact-center integrations make it the closer fit for enterprises replacing legacy IVR systems with AI voice agents. Retell AI's published per-minute pricing and API flexibility make it the closer fit for developer teams building custom workflows without enterprise sales cycles.

6) Cognigy

Cognigy is an enterprise conversational AI platform that supports voice, chat and SMS in one system, according to its homepage. Cognigy offers a low-code builder, pre-built integrations to contact-center platforms and CRMs, and SOC 2 Type II and ISO 27001 certifications according to its security page. Cognigy does not publish pricing; the platform needs a sales quote. Cognigy suits contact centers needing omnichannel AI.

Best for: Contact centers and enterprises needing voice, chat and SMS AI agents in one platform with enterprise support.

Key capabilities

• Omnichannel support for voice, chat, SMS and social-media messaging, according to Cognigy's platform page.
• Low-code flow builder with pre-built templates for customer service, sales and IT support, according to Cognigy's builder docs.
• Pre-built integrations to Salesforce, ServiceNow, Zendesk and Microsoft Dynamics, according to Cognigy's integrations page.
• Real-time analytics and reporting dashboard, according to Cognigy's analytics page.
• SOC 2 Type II, ISO 27001 and GDPR compliance, according to Cognigy's security page.

Pricing

Cognigy does not publish pricing on its website. According to its homepage, the platform needs a custom quote based on channel usage, integration requirements and support level. Teams should contact Cognigy's sales team for a quote.

Limitations

Cognigy's enterprise focus and custom pricing make it a poor fit for small businesses or teams needing transparent per-minute rates. Cognigy's documentation does not specify voice-agent latency; teams prioritizing sub-second response times should test before committing. Cognigy does not publish HIPAA business associate agreement availability; teams in healthcare should confirm compliance requirements with Cognigy's sales team.

How it compares with Retell AI

Cognigy's omnichannel support and enterprise integrations make it the closer fit for contact centers needing voice, chat and SMS AI in one platform. Retell AI's published per-minute pricing and API flexibility make it the closer fit for developer teams building custom voice workflows without enterprise sales cycles.

7) LiveKit

LiveKit is an open-source WebRTC infrastructure platform for building realtime voice, video and data applications, according to its homepage. LiveKit offers a self-hosted open-source framework under the Apache 2.0 license and a managed cloud service priced at $0.009 per participant-minute according to its pricing page as of October 2026. LiveKit suits developer teams building custom realtime media applications.

Best for: Developer teams building custom realtime voice and video applications with full control over infrastructure and media routing.

Key capabilities

• Open-source WebRTC server with support for voice, video and data channels, according to LiveKit's GitHub repository.
• Client SDKs for JavaScript, Swift, Kotlin, Flutter, React Native and Unity, according to LiveKit's SDK docs.
• Server-side APIs for room management, participant control and recording, according to LiveKit's server API docs.
• Egress and ingress pipelines for recording, streaming and integrating with external services, according to LiveKit's egress docs.
• Managed cloud service with global edge network, according to LiveKit's cloud page.

Pricing

LiveKit's open-source framework is free to self-host under the Apache 2.0 license, according to its GitHub repository. LiveKit's managed cloud service charges $0.009 per participant-minute, which includes WebRTC infrastructure but not speech-to-text, language models or text-to-speech, according to its pricing page as of October 2026. Teams must integrate their own AI services.

Limitations

LiveKit is a realtime media infrastructure platform, not a complete voice agent solution. Teams must integrate their own speech-to-text, language model and text-to-speech services, which adds complexity and cost. LiveKit's documentation does not include pre-built voice agent templates or call-flow builders; teams must build all logic from scratch. LiveKit does not publish SOC 2, HIPAA or PCI DSS compliance certifications for its cloud service; teams in regulated industries should confirm compliance with LiveKit's sales team.

How it compares with Retell AI

LiveKit's open-source framework and low cloud pricing make it the closer fit for developer teams building custom realtime media applications with full infrastructure control. Retell AI's complete voice agent platform and higher-level API make it the closer fit for teams needing a faster path to production without integrating multiple AI services.

8) Pipecat

Pipecat is an open-source Python framework for building voice agents, available under the BSD 2-Clause license according to its GitHub repository. Pipecat offers a modular pipeline architecture for composing speech-to-text, language models, text-to-speech and telephony services, and includes pre-built integrations to Deepgram, OpenAI, ElevenLabs and Twilio according to its documentation. Pipecat suits Python developers building custom voice pipelines.

Best for: Python developers building custom voice agents with full control over the AI pipeline and service providers.

Key capabilities

• Modular pipeline architecture for composing speech-to-text, language models, text-to-speech and telephony, according to Pipecat's architecture docs.
• Pre-built integrations to Deepgram, OpenAI, Anthropic, ElevenLabs, Cartesia and Twilio, according to Pipecat's integrations page.
• WebRTC and SIP support for inbound and outbound calls, according to Pipecat's telephony docs.
• Function calling for triggering actions in external systems mid-call, according to Pipecat's function-calling guide.
• Example applications for appointment booking, customer support and sales calls, according to Pipecat's examples repository.

Pricing

Pipecat is free to use under the BSD 2-Clause license, according to its GitHub repository. Teams pay only for the underlying services they integrate (speech-to-text, language models, text-to-speech, telephony), which they provision separately.

Limitations

Pipecat is a framework, not a hosted platform. Teams must deploy and manage their own infrastructure, which needs DevOps resources. Pipecat does not include a no-code builder or visual call-flow editor; all configuration is done in Python code. Pipecat's documentation does not include pre-built compliance certifications; teams in regulated industries must ensure their deployment meets SOC 2, HIPAA or PCI DSS requirements.

How it compares with Retell AI

Pipecat's open-source framework and modular architecture make it the closer fit for Python developers needing full control over the AI pipeline and service providers. Retell AI's hosted platform and higher-level API make it the closer fit for teams needing a faster path to production without managing infrastructure.

How do you choose the right Retell AI alternative?

Choose based on build model, use case, pricing structure, integration requirements and compliance needs. The questions below map each decision to the vendors that fit.

Do you need a no-code builder or an API?

Operations teams, agencies and small businesses without in-house developers should choose a no-code builder: Synthflow, Thoughtly, PolyAI or Cognigy. Developer teams needing API control and custom logic should choose a developer platform or framework: Vapi, Bland AI, LiveKit or Pipecat.

Will you run inbound, outbound or both?

Teams running only outbound sales campaigns should choose Bland AI, which offers campaign management and lead-tracking tools. Teams running only inbound customer service should choose PolyAI or Cognigy, which offer contact-center integrations and multi-language support. Teams running both inbound and outbound should choose Vapi, Retell AI, Synthflow or Thoughtly.

Which systems must it write to?

Teams needing native integrations to Salesforce, HubSpot or ServiceNow should choose Synthflow, Cognigy or PolyAI, which document those connections. Teams comfortable building custom integrations via API or Zapier can choose any developer platform. Teams needing electronic health record integrations should confirm availability with the vendor's sales team, as few platforms document those connections publicly.

Do you need a HIPAA business associate agreement?

Teams in healthcare must confirm HIPAA business associate agreement availability with the vendor's sales team before committing. Retell AI, Vapi, Bland AI, Synthflow and Thoughtly do not publish HIPAA compliance on their public pages as of October 2026. PolyAI and Cognigy are enterprise platforms that may offer HIPAA BAAs; confirm with their sales teams.

How predictable must the monthly bill be?

Teams needing predictable monthly costs should choose Synthflow or Thoughtly, which offer fixed-price plans with included minutes. Teams comfortable with usage-based billing should choose Vapi, Retell AI or Bland AI, which charge per minute. Teams running very high volumes should request custom quotes from PolyAI or Cognigy, which may offer volume discounts.

What level of latency and voice quality do you need?

Teams prioritizing sub-second latency should choose Retell AI or Vapi, which reportedly offer low-latency infrastructure according to third-party sources. Teams needing natural-sounding voices should test each platform's text-to-speech options, as voice quality varies by provider. Teams building custom pipelines can choose LiveKit or Pipecat and integrate their preferred speech services.

Frequently asked questions

What is the best Retell AI alternative for small businesses without developers?

Synthflow is the best Retell AI alternative for small businesses without developers, because it offers a no-code drag-and-drop builder priced from $29 per month according to its pricing page as of October 2026. Synthflow includes hosted telephony and pre-built integrations to Google Calendar, HubSpot and Salesforce, which eliminates the need for API integration work. Thoughtly is a second option, priced from $99 per month with pre-built templates for appointment scheduling and lead qualification.

Is there a cheaper alternative to Retell AI?

Vapi is cheaper than Retell AI on a per-minute basis, priced at $0.05 per minute compared to Retell AI's $0.08 per minute according to Vapi's pricing page and Retell AI's pricing page as of October 2026. Pipecat and LiveKit are free open-source frameworks, but teams must pay for the underlying AI services they integrate and manage their own infrastructure. Synthflow's $29 per month plan is cheaper than Retell AI for teams running fewer than 30 minutes per month, but its per-minute overage rate is higher.

Which Retell AI alternative has a no-code builder?

Synthflow, Thoughtly, PolyAI and Cognigy offer no-code or low-code builders. Synthflow and Thoughtly are priced for small businesses and agencies, with drag-and-drop call-flow editors and hosted telephony. PolyAI and Cognigy are enterprise platforms with low-code builders, pre-built integrations to contact-center systems and custom pricing. Teams needing a no-code builder should choose based on budget and integration requirements.

Is Retell AI worth it?

Retell AI is worth it for developer teams prioritizing low latency and API flexibility, because its infrastructure reportedly offers sub-800ms response times according to third-party sources and its API supports custom function calling and model selection. Retell AI is not worth it for operations teams without developers, because it needs code to configure agents and does not offer a no-code builder. Teams needing transparent per-minute pricing below $0.08 should consider Vapi; teams needing a no-code builder should consider Synthflow or Thoughtly.

What is the best Retell AI alternative for enterprise customer service?

PolyAI is the best Retell AI alternative for enterprise customer service, because it offers multi-language support for 14+ languages, pre-built integrations to contact-center platforms including Genesys and Five9, and SOC 2 Type II and ISO 27001 certifications according to its security page. Cognigy is a second option, offering omnichannel support for voice, chat and SMS in one platform with enterprise integrations to Salesforce, ServiceNow and Zendesk. Both platforms need custom quotes.

Which alternative offers the lowest latency?

Retell AI reportedly offers the lowest latency among hosted platforms, with sub-800ms response times according to third-party sources. Vapi is a close second, with similar API flexibility and a lower per-minute rate. LiveKit and Pipecat offer the most control over latency, because teams can optimize their own infrastructure and choose low-latency speech services, but they need more engineering effort to deploy.

Can I use an open-source alternative to Retell AI?

Pipecat and LiveKit are open-source alternatives to Retell AI. Pipecat is a Python framework for building voice agents, available under the BSD 2-Clause license according to its GitHub repository. LiveKit is a WebRTC infrastructure platform, available under the Apache 2.0 license according to its GitHub repository. Both need teams to integrate their own speech-to-text, language model and text-to-speech services and manage their own infrastructure.

How does Vapi compare with Retell AI and Bland AI?

Vapi is priced at $0.05 per minute, Retell AI at $0.08 per minute and Bland AI at $0.09 per minute according to their respective pricing pages as of October 2026. Vapi offers the lowest per-minute rate and 6,000+ app integrations via Make and Zapier. Retell AI reportedly offers the lowest latency. Bland AI offers campaign management tools for outbound sales calls. Teams prioritizing cost should choose Vapi; teams prioritizing latency should choose Retell AI; teams running structured outbound campaigns should choose Bland AI.

Last updated: October 2026.