Rev AI vs Retell AI — Comparison

Rev AI

Rev AI, part of the Rev family, is a developer-first API that delivers industry-leading accuracy and fast performance at global scale. Click to learn

Get machine-generated transcripts in minutes from pre-recorded files or in real-time as audio streams. High accuracy across 57+ languages with proper grammar, punctuation, and formatting. Rev AI consistently outperforms competitors in accuracy for virtually every use case. Our proprietary models are trained using a carefully selected subset from a library of over 7M hours of human-verified speech data, giving us unmatched precision and adaptability. Get up and running in under an hour with our easy-to-use API, comprehensive SDKs, and expert support. Deploy in the cloud or on-prem. Go beyond transcription with language identification, sentiment analysis, topic extraction, summarization, and translation. Turn voice content into actionable intelligence. Handle sensitive data with confidence. SOC II, HIPAA, GDPR, and PCI compliant with 99.99% uptime. All files encrypted at rest and in transit. Enhance content searchability and analysis with precise word-level timestamps. Perfect for media applications, accessibility, and content indexing. Serve customers worldwide with 57+ languages and context-aware translations. Meet demand in new markets with consistently low WER. Find the right solution for you For press inquiries, email us at: press@rev.com Find the right solution for you For press inquiries, email us at: press@rev.com This short tutorial will teach you the basics of using the Asynchronous Speech-to-Text API. It demonstrates how to produce a transcript of an audio file submitted by you. This tutorial assumes that you have a Rev AI account. If not, sign up for a free account. The first step is to generate an access token, which will enable access to the Rev AI APIs. Follow these steps: The new access token will be generated and displayed on the screen. Save your access tokens somewhere safe; you will only be able to see them once. You are allowed a maximum of 2 access tokens at a time. Submit an audio file for transcription to Rev AI using the command below. Replace the REVAI_ACCESS_TOKEN placeholder with the access token obtained in Step 1, and replace the sample file URL shown below with the URL to your own audio file if required. You'll receive a response like this: You now need to wait for the job to complete. Wait for approximately 1 minute and then check the status of your job by querying the API as shown below: Polling the API periodically for job status is NOT recommended in a production server. Rather, use webhooks to asynchronously receive notifications once the transcription job completes. Here is an example of the output: Alternatively, you can get the plaintext version by running the command below:

Retell AI

Build, test, deploy, and monitor production-ready AI voice agents at scale with ease, boosting efficiency and performance across your operations.

Build, deploy, and manage next-generation AI voice agents that sound human, execute tasks, and scale effortlessly. LLM based, humanlike, voice-first conversational AI platform Receive a live call from our agent and discover how our AI caller transforms customer conversations. Discover how businesses use Retell’s AI voice agents to streamline operations, enhance customer service, and scale effortlessly. Proprietary Voice AI Orchestration Delivering Human-Quality, Low-Latency Phone Conversations At Scale Independent benchmarks confirm Retell as the leader in responsiveness. With ~600ms latency, conversations stay smooth and fluent. Built from real performance data and refined through human-guided training Proprietary turn-taking model that knows when to stop and when to listen. Handle everything from routine requests to complex edge cases without trade-offs. Launch 
in weeks, not months. Design reliable conversational call flows with a drag-and-drop agentic framework, built-in guardrails, and full control over agent behavior. Add built-in or custom functions directly into call flows, enabling agents to book appointments, process payments, update records, and transfer calls in real time. Ensure accurate, real-time answers in every call, backed by a knowledge base that automatically syncs with your latest website content. Test agents across real-world scenarios before launch, validating behavior, accuracy, and reliability at scale. Review past calls to surface failure patterns and actionable insights that continuously improve agent performance. Design custom charts and dashboards to analyze call outcomes, agent performance, and business impact. Deliver natural, human-like phone conversations at scale. Deploy AI-powered conversations across web and in-app chat experiences. Engage customers through reliable, compliant text messaging workflows. Build and orchestrate custom communication experiences through a flexible API. Deliver natural, human-like phone conversations at scale. Deploy AI-powered conversations across web and in-app chat experiences. Engage customers through reliable, compliant text messaging workflows. Build and orchestrate custom communication experiences through a flexible API. Enable Retell AI’s Branded Call feature to unlock new levels of customer trust and satisfaction for outbound call operations. Use your existing phone numbers or your familiar VOIP providers. You can connect to any telephony using Retell SIP Trunking. Effortlessly run batch call campaigns without concurrency limits, with detailed conversion tracking available after each campaign. Build and maintain trust with customers with verified phone numbers that prevent your calls being labeled as spam. From data protection and compliance to uptime and system resilience, Retell delivers the enterprise-grade security and reliability required to run voice AI at production scale. Fully compliant with HIPAA, SOC2 Type II, and GDPR. We ensure your vo

Rev AI

Retell AI

Rev AI

Retell AI

Rev AI

Retell AI