Retell AI
Voice Agents
Build human-like voice AI agents in a day
Like Vapi, Retell AI is in the Voice Agents category. Both are paid. Worth comparing on the detail page.
We've curated 47 of the best alternatives to Vapi, ranked by feature overlap, topic similarity, user ratings, and popularity. Retell AI, Vogent, and Bolna lead the list as the closest matches.
Updated May 18, 2026
The list includes 1 freemium, 43 paid, and 3 with a free trial, so whether you're looking for a no-cost replacement or a more capable paid tier, there's an option to compare. Vapi itself is paid, which makes paid alternatives the most natural starting point.
Many of these tools cluster around use cases like Developer Tools, Agent, Ai Development, and Api — the same problem spaces Vapi addresses. Cross-referencing tools that overlap on multiple topics gives a more reliable signal than category alone, because two products in the same category can still serve very different workflows.
Our ranking weighs eight signals: shared category, topic overlap, feature overlap, name and description text similarity (via PostgreSQL's pg_trgm and tsvector), Bayesian-smoothed user ratings, pricing-model match, popularity, and editorial overrides. Scores are then normalized within each tool's own candidate pool so the top match always represents the strongest available alternative.
Use the table of contents below to jump to free or paid alternatives, or scroll down to compare each option side-by-side with Vapi.
Ranked by compatibility score
Voice Agents
Build human-like voice AI agents in a day
Like Vapi, Retell AI is in the Voice Agents category. Both are paid. Worth comparing on the detail page.
Voice Agents
Build humanlike voice AI agents fast.
Like Vapi, Vogent is in the Voice Agents category. Both are paid. Worth comparing on the detail page.
0 free and 1 freemium options.
1 free or freemium alternative to Vapi on /tools/vapi/alternatives.
43 paid options.
23 additional candidates
Retell AI ranks as the highest-scoring alternative to Vapi, based on shared category, topic overlap, feature similarity, and user ratings. Ratings are still being collected for this tool.
Yes — 0 fully free and 1 freemium alternatives are available, including Vocode.
Retell AI is similarly priced (paid) and sits in the same category (Voice Agents). View its detail page to compare features, integrations, and reviews side-by-side.
Top Voice Agents alternatives include Retell AI, Vogent, Bolna, and CallFluent. These tools share the same primary category and have meaningful topic overlap with Vapi.
Neither Vapi nor Retell AI has user ratings yet — be the first to review either tool to help future visitors compare them.
Voice Agents
Create voice based AI agents in less than 5 minutes
Like Vapi, Bolna is in the Voice Agents category. Both are paid. Worth comparing on the detail page.
Voice Agents
Create AI voice agents for automated calls in seconds.
Like Vapi, CallFluent is in the Voice Agents category. Both are paid. Worth comparing on the detail page.
Voice Agents
AI voice calls that sound human
Like Vapi, Cols AI is in the Voice Agents category. Both are paid. Worth comparing on the detail page.
Voice Agents
Develop Advanced LLM-Based Voice Agents with Ultra-Fast 600ms Latency
Like Vapi, Millis AI is in the Voice Agents category. Both are paid. Worth comparing on the detail page.
Voice Agents
Smart Conversations, Real Results 24/7 AI Voice Agents for Growing Businesses
Like Vapi, Dialora.ai is in the Voice Agents category. Both are paid. Worth comparing on the detail page.
Voice Agents
Build and deploy hyperrealistic voice AI agents.
Like Vapi, Vocode is in the Voice Agents category. Vocode is freemium, while Vapi is paid. Worth comparing on the detail page.
Voice Agents
Voice AI agents for smarter websites
Like Vapi, Voice Flux is in the Voice Agents category. Voice Flux is free-trial, while Vapi is paid. Worth comparing on the detail page.
Voice Agents
Add AI voice agents to your website in minutes.
Like Vapi, Calldock is in the Voice Agents category. Calldock is free-trial, while Vapi is paid. Worth comparing on the detail page.
Voice Agents
Connect any Voice AI under your brand
Like Vapi, VoiceAIWrapper is in the Voice Agents category. VoiceAIWrapper is free-trial, while Vapi is paid. Worth comparing on the detail page.
Writing Documentation
Automatic code documentation powered by AI.
Stenography shares 1 topic with Vapi: Developer Tools. Both are paid.
Images
Create unique AI-generated Pokmon creatures
AI Pokemon generator shares 1 topic with Vapi: From $2/mo. Both are paid.
Coding
AI pair programmer for limitless coding possibilities
AskCodi shares 1 topic with Vapi: Developer Tools. Both are paid.
Chatgpt
AI-powered content creation and editing assistant.
SlickGPT by ShipBit shares 1 topic with Vapi: Ai Development. Both are paid.
Tech News Summaries
AI-powered daily newsfeed summary
Concise shares 1 topic with Vapi: From $2/mo. Both are paid.
Prompt Testing
Supercharge AI prompt testing for developers.
Reprompt shares 1 topic with Vapi: Ai Development. Both are paid.
Chatgpt For Xcode
Supercharge Swift development with AI-powered code assistance
XcodeChatGPT shares 1 topic with Vapi: Developer Tools. Both are paid.
App Icons
Generate custom icons effortlessly with AI
Imagin World shares 1 topic with Vapi: Developer Tools. Both are paid.
Apps
Turn AI ideas into money-making products
The GPT Factory shares 1 topic with Vapi: Ai Development. Both are paid.
Customer Support
Automate guest messaging for vacation rentals.
HostAI shares 1 topic with Vapi: Voice Ai. Both are paid.
Web Apps
AI-driven MERN stack development in minutes.
MERN.AI shares 1 topic with Vapi: Ai Development. Both are paid.
Chatting
Visual notebook for AI conversations
grafychat shares 1 topic with Vapi: Ai Development. Both are paid.
School Preparation
Supercharge your mind through daily learning.
Memgrain shares 1 topic with Vapi: From $2/mo. Both are paid.
37 more paid alternatives listed below. Browse all Vapi alternatives ↓
43 paid alternatives to Vapi on /tools/vapi/alternatives.
CodeViz shares 1 topic with Vapi: Developer Tools. Both are paid.
