WhisperAPI vs Universal-3 Pro by AssemblyAI vs OpenAI Whisper API vs Sonix
Which one fits you in 2026? Traffic, pricing, input → output, tasks and community side by side.
Your tool
WhisperAPI
vs WhisperAPI
Competitor 1
Universal-3 Pro by AssemblyAI
Universal-3 Pro by AssemblyAI
Competitor 2
OpenAI Whisper API
OpenAI Whisper API
Competitor 3
Sonix
SonixCompare
4 tools · best value per row highlighted
Competitor
Universal-3 Pro by AssemblyAI
Universal-3 Pro by AssemblyAI
assemblyai.com
Speech-to-text API built for accuracy at scale
Competitor
OpenAI Whisper API
OpenAI Whisper API
platform.openai.com
OpenAI Whisper API is the speech-to-text service developers call to convert recorded audio into text.
Competitor
Sonix
Sonix
sonix.ai
Sonix is transcription software that turns audio and video recordings into text with timestamps and speaker labels.
Traffic estimated monthly website traffic
Monthly visits
27.3Kvisits/mo
457.8Kvisits/mo
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MoM change
▲ 10.3%
▼ 12.0%
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6-month growth
+41.8%
-16.3%
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Global rank web
#1,130,497
#87,404
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Avg. last 3 months
25.6K
518.4K
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Bounce rate lower is better
40%
37%
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Pages / visit
1.7
4.0
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Visit duration
14s
3m 12s
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Traffic sources
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● Direct 91% · ● Referral 8%
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WhisperAPIUniversal-3 Pro by AssemblyAIOpenAI Whisper APISonix
Pricing
Model
Freemium
Freemium
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Free Trial
Starting price
$10per month · free tier available
Free tier
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$25per month
Free tier
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Free trial
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API access
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Plans
Free Trial FreePay-As-You-Go (40 credits) $10Pay-As-You-Go (100 credits) $20Pay-As-You-Go (200 credits) $30+1 more
Free Trial FreePay-as-you-go Universal-2 $0.15/moPay-as-you-go Universal-3.5 Pro $0.21/mo
gpt-transcribe Customgpt-4o-transcribe Customgpt-4o-mini-transcribe Customgpt-realtime-whisper Custom
Pay As You Go $10Core $25/moAdvanced $50/moPro $80/mo+1 more
Capabilities input → output
Input
AudioVideo
Audio
Audio
AudioDocumentsVideo
Output
Text
Text
Text
Text
Skill level
Advanced
Advanced
Advanced
Beginner-friendly
Categories
Tasks what each tool can do · 1 shared · core partial
Tasks covered
5
3
8
6
Transcription
APIs
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Podcast transcription
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Audio video transcription
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Video transcription
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Speech recognition
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Translations
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Audio translation
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Call transcriptions
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Developer tools
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Meeting summaries
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Meeting transcription
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Multilingual subtitle creation
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Sentiment analysis
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Summarizing
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Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 0
▲ 0
▲ 0
▲ 0
Saves
0
0
0
0
Reviews
0
0
0
0
Prompts
0
0
0
0
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.