Developer platform that wires together speech recognition, an AI model and speech generation into a working phone-answering voice agent.
vapi.ai
Alternatives to
Retell AI
Best alternatives to Retell AI in 2026
A support or sales team fielding thousands of routine phone calls a month usually has to choose between hiring more people or accepting long hold times. Retell AI offers a third option: an AI agent that answers the phone, follows a conversation flow, looks things up, and hands off to a human only when it genuinely needs to — configured through a visual interface rather than requiring a team to write custom telephony code. Retell AI is a platform for building, deploying and managing AI voice agents that automate phone calls, aimed at healthcare, financial services, insurance, logistics, retail and hospitality companies with large support and sales operations. It targets around 600ms latency for natural-feeling conversation, supports real-time function calling so an agent can look up information or take action mid-call, offers drag-and-drop agent configuration, a knowledge base with streaming retrieval-augmented generation, batch calling for outbound campaigns, and post-call analysis with AI-driven quality assurance. Pricing is pay-as-you-go at roughly $0.07-$0.31 per minute depending on configuration, with free credits to start and custom Enterprise pricing for larger deployments.
Quick comparison of Retell AI alternatives
| # | Tool | Best for | Price |
|---|---|---|---|
| 1 | Enterprise customers, SaaS developers and voice-agent builders needing phone-based AI agents | — | |
| 2 |  Bland.is | Grand public | — |
| 3 | Enterprise organizations and foundation model builders needing multimodal data annotation | — | |
| 4 | AI developers, researchers and companies training and serving ML models without long procurement cycles | — | |
| 5 | Enterprises in fintech, healthcare and hospitality needing natural, multilingual conversational voice AI | — | |
| 6 | Hyperscalers, regulated enterprises, frontier AI labs, startups, researchers and government | — | |
| 7 | Frontier AI labs, research teams and enterprises building AI agents and robotics systems | — | |
| 8 | Data scientists and AI/ML teams running multiple large-scale annotation projects in parallel | — | |
| 9 | Computer vision and physical AI/robotics teams needing to label video, 3D/LiDAR and multi-sensor data | — | |
| 10 | Developers building voice AI applications, platforms embedding speech APIs, enterprises with custom model needs | — | |
| 11 | Enterprise AI labs and research organizations needing large-scale, dedicated NVIDIA GPU capacity | — | |
| 12 | Enterprises in financial services, healthcare, government, customer support and fraud detection needing low-latency voice AI | — |
#1
- ✓ Bundles STT, LLM, TTS and telephony into one platform
- ✓ Sub-500ms latency target for natural phone conversations
#3
Data annotation and evaluation platform that turns raw images, video, text and audio into labeled datasets for training and fine-tuning AI models.
superannotate.com
- ✓ Multimodal annotation across images, video, text and audio
- ✓ Built-in integrations with major cloud data warehouses
#4
Pay-by-the-second GPU cloud for training and running AI models, with no contracts and fast serverless cold starts.
runpod.io
- ✓ Self-serve with no contracts or minimum commitments
- ✓ Sub-200ms serverless cold starts
#5
Text-to-speech API built by linguists for hundreds of natural-sounding voices across 50+ languages, tuned for real conversation, not audiobooks.
rime.ai
- ✓ 600+ voices across 50+ languages and regional dialects
- ✓ Deterministic pronunciation controls for proper nouns/technical terms
#6
GPU cloud built for AI research and production, scaling from a single rented GPU up to superclusters with over 165,000 GPUs.
lambda.ai
- ✓ Scales from single GPU rentals to 165,000+ GPU superclusters
- ✓ Research-first origins with strong credibility among AI labs
#7
Data platform for labeling, curating and generating human feedback to train and fine-tune AI models, including reinforcement learning workflows.
labelbox.com
- ✓ RL and human-feedback infrastructure (Horizon, Recursion) beyond basic labeling
- ✓ Large network of contracted expert reviewers for quality human feedback
#8
Data annotation platform built for organizations running many labeling projects at once across images, video, text, PDF and geospatial data.
kili-technology.com
- ✓ Built for managing many concurrent annotation projects at once
- ✓ Distinctive geospatial data annotation support
#9
Platform for labeling, organizing and quality-checking the images, video and sensor data used to train computer vision and robotics AI models.
encord.com
- ✓ Native video, LiDAR and 3D/spatial annotation support
- ✓ Multi-sensor dataset orchestration for robotics/autonomous systems
#10
Speech recognition and voice-generation API that lets developers add accurate, fast transcription and natural-sounding speech to any app.
deepgram.com
- ✓ Both speech-to-text and text-to-speech in one API
- ✓ Bundled Voice Agent API for full voice pipelines
#11
Enterprise cloud built specifically around NVIDIA GPUs, providing large-scale compute for training and running the biggest AI models.
coreweave.com
- ✓ Trusted by major AI labs (OpenAI, Mistral AI, Google) at production scale
- ✓ Zero egress fees on storage, free Kubernetes control plane
#12
Real-time voice AI models built for near-instant, natural-sounding speech — the audio layer behind voice agents that need to feel like a real conversation.
cartesia.ai
- ✓ Architecture (SSM) specifically built for low-latency real-time speech
- ✓ Cloud, on-premise and on-device deployment options
FAQ about Retell AI alternatives
- What is the best alternative to Retell AI in 2026?
- Based on our selection, Vapi is the best alternative to Retell AI in 2026. Developer platform that wires together speech recognition, an AI model and speech generation into a working phone-answering voice agent.. See our full ranking above to compare all options.
- Is Retell AI free?
- Retell AI is a paid tool. Several alternatives in our selection offer free or freemium versions.
- How many alternatives to Retell AI are there?
- mySelectas has listed 12 alternatives to Retell AI in the AI & Machine Learning category. Our selection is updated regularly to include the best options available.