Vapi vs Deepgram Voice Agent API vs Defapi vs CometAPI

Which one fits you in 2026? Traffic, pricing, input → output, tasks and community side by side.

Your tool
Vapi
vs
Competitor 1
Deepgram Voice Agent API
Competitor 2
DDefapi
Competitor 3
CometAPI
Compare
4 tools · best value per row highlighted
Your tool Vapi
vapi.ai
Vapi is a developer platform for building, testing and deploying voice AI agents that talk to customers on the phone.
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Competitor Deepgram Voice Agent API
deepgram.com
The Deepgram Voice Agent API is one real-time API that combines speech recognition, language model orchestration and speech synthesis, so developers do not have to stitch separate services together.
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Competitor DDefapi
defapi.org
You know how managing multiple AI provider integrations usually means maintaining separate codebases for each vendor
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Competitor CometAPI
cometapi.com
CometAPI functions as an aggregation layer that sits between your application and hundreds of AI model providers
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Traffic estimated monthly website traffic
Monthly visits
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2.4Kvisits/mo
302.3Kvisits/mo
MoM change
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▼ 42.6%
▲ 9.9%
6-month growth
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-86.2%
-16.5%
Global rank web
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#4,650,820
#157,147
Avg. last 3 months
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4.8K
295.7K
Bounce rate lower is better
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36%
46%
Pages / visit
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1.4
2.9
Visit duration
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7s
38s
Traffic sources
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● Direct 69% · ● Referral 30%
VapiDeepgram Voice Agent APIDefapiCometAPI
0208.6K417.2K625.8K834.4KDefapi · 11.1KDefapi · 13KDefapi · 12.4KDefapi · 17.7KDefapi · 9.4KDefapi · 6.2KDefapi · 7.6KDefapi · 4.2KDefapi · 2.4KCometAPI · 834.4KCometAPI · 619.7KCometAPI · 437.2KCometAPI · 362.2KCometAPI · 355.5KCometAPI · 362.7KCometAPI · 309.5KCometAPI · 275.2KCometAPI · 302.3K1K10K100K1MDefapi · 11.1KDefapi · 13KDefapi · 12.4KDefapi · 17.7KDefapi · 9.4KDefapi · 6.2KDefapi · 7.6KDefapi · 4.2KDefapi · 2.4KCometAPI · 834.4KCometAPI · 619.7KCometAPI · 437.2KCometAPI · 362.2KCometAPI · 355.5KCometAPI · 362.7KCometAPI · 309.5KCometAPI · 275.2KCometAPI · 302.3KDec '25Jan '26FebMarAprMayJunJulAug
Pricing
Model
Freemium
Paid
Paid
Freemium
Starting price
$29per month
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$4per month · free tier available
Free tier
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Free trial
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API access
Plans
No Success Package FreeCore $29/moPro $999/moPremier Custom
Pay As You Go CustomGrowth $4,000/yrEnterprise Custom
Gemini 3.1 Pro Preview $1/$6/per requestClaude Sonnet 4.6 $1.5/$7.5/per requestClaude Opus 4.6 $2.5/$12.5/per requestSora 2 Stable $0.175+/per request+2 more
Free Trial FreePay-as-you-go Custom/usage-basedEnterprise Custom/mo
Capabilities input → output
Input
AudioText
AudioText
ImagesTextAudio
TextImages
Output
AppsAudio
AudioText
TextImagesAudio
VideoTextImages
Skill level
Advanced
Advanced
Advanced
Advanced
Categories
Business & MarketingVoice & SpeechAI Call CenterAI Customer Service+1 more
Business & MarketingDevelopment & CodeVoice & SpeechAI API+2 more
Development & CodeAI API
Development & CodeAI API
Tasks what each tool can do · 1 shared · core   partial
Tasks covered
11
11
4
6
APIs
Developer tools
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Voice agents
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API integrations
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Call center automation
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Agent creation
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Customer calls
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LLM gateway
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API management
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Call agents
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Customer support
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Text to speech
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Transcription
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Voice
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Voice assistance
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API security
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Agent testing
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Call answering
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Calls
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Image generation
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Speech to speech
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Video generation
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Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
no ratings yet
Upvotes
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Saves
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Reviews
0
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Prompts
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Verified listing
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Traffic figures are third-party estimates for the tool's own domain; tools sharing a domain with a bigger product are not counted. Pricing is captured from each tool's site and may lag.