The 10 Best Retell AI Alternatives in 2026 (Compared)

Retell AI is a voice AI agent platform for automating inbound and outbound phone calls at production scale. It combines your choice of LLM (OpenAI, Anthropic Claude, Google Gemini) with voice engines like ElevenLabs v3, OpenAI, and Cartesia, and runs on a proprietary turn-taking model that handles interruptions and barge-in mid-sentence. The platform offers both a drag-and-drop builder and a full API, with conditional branching, warm transfer logic, and fallback nodes for unrecognized intents. Every call produces a structured transcript with sentiment scoring, custom extracted fields, and resolution tracking. Compliance is included on every plan: HIPAA with self-serve BAA, SOC 2 Type I and II, GDPR, and ISO 27001, plus automatic PII redaction for names, addresses, DOBs, passwords, and PINs. Retell cites ~600ms end-to-end latency and greater than 99.9% uptime, and supports 55 languages, native SIP trunking, branded calls, and batch calling. Customers include healthcare and contact-center teams; Pine Park Health reports a 38% increase in scheduling NPS, and Medical Data Systems reports handling 100% of inbound calls with a 30% transfer rate.

Agents by AIQ is the agent-focused arm of AIQ Labs, the team behind the AI Business Sites platform. Rather than handing you a DIY toolkit, it designs, builds, connects, and runs done-for-you AI agents for small and mid-size businesses. The service covers AI receptionists and phone answering on a real phone number, voice agents, sales follow-up and SDR agents, customer support agents, email agents, marketing agents, appointment setters, and workflow automation — integrated with the tools the business already uses. The positioning is deliberately not another AI wrapper: each engagement is a managed build operated by AIQ Labs, scoped on a call to the specific business. Target buyers are owner-operators and small teams in trades, legal, healthcare, insurance, real estate, ecommerce, and professional services who are losing missed calls, suffering slow lead follow-up, and drowning in manual busywork. Engagements are month-to-month and the client owns everything that is built.

Bland AI is a developer-centric conversational AI platform for inbound and outbound calls, built around raw building blocks: webhooks, memory stores, conversational pathways, and voice cloning. Its 'Conversational Pathways' engine splits prompts into nodes connected into structured flows with strict guardrails, and its inference-only LLM architecture integrates with its own text-to-speech system. Bland self-hosts its TTS, ASR, and inference models and offers enterprise clients dedicated servers and GPUs for consistent performance under unpredictable spikes. It can handle thousands of calls a day, integrate with CRM and ERP systems, clone a voice from a short audio clip, run large outbound campaigns, and extend agents across calls, SMS, and chat. It is positioned as a quick way to prototype a voice bot on a single open-source LLM, and reviewers note it works well for demos and low-stakes automation, but that production deployments demand careful prompt structuring, edge-case handling, and fallback design.

Vapi is a developer platform for building custom voice AI pipelines, ranked in a July 2026 evaluation as the best choice for developers building custom voice pipelines. It advertises a $0.05/min platform rate, making it one of the cheapest headline prices in the category, though the all-in cost once ASR, LLM, and telephony components are added runs roughly $0.25–$0.33/min. Latency sits in the 500–900ms range. Vapi offers 60 free minutes to start and carries SOC 2 and HIPAA certifications, with PCI available at the enterprise tier. Compared with Retell, Vapi focuses on basic functionalities and maximum pipeline flexibility rather than bundled production features, which makes it a cost-effective choice for teams that do not require extensive built-in capabilities — provided they have the engineering capacity to assemble and maintain the stack themselves.

ElevenLabs is best known for high-quality voice generation and has extended into conversational AI agents, ranked in a July 2026 evaluation as the top choice for voice quality in branded experiences. Its conversational AI services run at approximately $0.10 per minute with additional costs for LLM integration, and subscription plans span $6–$990/month with extra minutes at $0.08 plus LLM costs. A free tier includes 15 minutes per month, and volume discounts are available for businesses with extensive usage. Voice generation latency is 400–600ms. Compliance coverage includes SOC 2 and GDPR, with HIPAA-readiness available at the enterprise tier. For businesses where the sound of the brand matters — polished voice experiences across phone and other channels — ElevenLabs is frequently the reference point for voice quality in the category.

Synthflow is a no-code voice AI builder ranked in a July 2026 evaluation as the best no-code option for small teams. It offers transparent pay-as-you-go pricing at roughly $0.15–$0.24/min all-in, with essential features included in its subscription costs to avoid hidden fees and give businesses predictable budgeting. Latency is variable, with sub-600ms performance available via a paid add-on. Compliance includes SOC 2 and GDPR, with HIPAA available only on the enterprise tier. There is no free tier, but the PAYG model means businesses pay based on actual usage. Synthflow's model includes essential features within its subscription costs, providing clarity for budgeting, and its plans are tailored to different business sizes and needs — a deliberate contrast to developer-first platforms that assume engineering resources.

Thoughtly is a voice AI platform positioned for rapid go-to-market and sales outreach, ranked in a July 2026 evaluation as the best option for rapid GTM and sales outreach. Pricing is plan-based starting from approximately $0.09/min, with a 14-day trial that lets teams evaluate before committing. Latency is around 700ms — slightly behind Retell's ~600ms but within the range where callers generally stay engaged. Compliance coverage includes SOC 2 and HIPAA. Thoughtly suits teams whose primary use case is outbound sales, qualification, and outreach campaigns rather than broad contact-center automation, offering a faster path from signup to live campaigns than developer-first platforms.