Universal-3 Pro by AssemblyAI vs WhisperAPI vs Sleekio

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

Your tool
Universal-3 Pro by AssemblyAI
vs
Competitor 1
WhisperAPI
Competitor 2
Sleekio
Competitor 3
Suggested competitors for Universal-3 Pro by AssemblyAI: Deepgram92% Speechmatics | AI Voice Agents90% Google Cloud Speech-to-Text80% OpenAI Whisper API78% Eden AI78% Soniox77% MacWhisper77% TurboScribe76%
Compare
3 tools · best value per row highlighted
Your tool Universal-3 Pro by AssemblyAI
assemblyai.com
Speech-to-text API built for accuracy at scale
Remove
Competitor WhisperAPI
whisper-api.com
WhisperAPI lets you upload 10GB video files
Make main Remove
Competitor Sleekio
sleekio.io
This Chrome extension turns voice recordings into text and polishes existing writing inside any text box on the web
Make main Remove
Traffic estimated monthly website traffic
Monthly visits
457.8Kvisits/mo
27.3Kvisits/mo
—
MoM change
▼ 12.0%
▲ 10.3%
—
6-month growth
-16.3%
+41.8%
—
Global rank web
#87,404
#1,130,497
—
Avg. last 3 months
518.4K
25.6K
—
Bounce rate lower is better
37%
40%
0%
Pages / visit
4.0
1.7
—
Visit duration
3m 12s
14s
—
Traffic sources
● Direct 91% · ● Referral 8%
—
—
Universal-3 Pro by AssemblyAIWhisperAPISleekio
0157.2K314.4K471.5K628.7KUniversal-3 Pro by AssemblyAI · 568.9KUniversal-3 Pro by AssemblyAI · 565KUniversal-3 Pro by AssemblyAI · 595.5KUniversal-3 Pro by AssemblyAI · 506.7KUniversal-3 Pro by AssemblyAI · 547.2KUniversal-3 Pro by AssemblyAI · 590.1KUniversal-3 Pro by AssemblyAI · 628.7KUniversal-3 Pro by AssemblyAI · 577KUniversal-3 Pro by AssemblyAI · 520.4KUniversal-3 Pro by AssemblyAI · 457.8KWhisperAPI · 17.8KWhisperAPI · 25.7KWhisperAPI · 26.6KWhisperAPI · 19.2KWhisperAPI · 23.8KWhisperAPI · 25.8KWhisperAPI · 24.8KWhisperAPI · 24.7KWhisperAPI · 27.3K10K100K1MUniversal-3 Pro by AssemblyAI · 568.9KUniversal-3 Pro by AssemblyAI · 565KUniversal-3 Pro by AssemblyAI · 595.5KUniversal-3 Pro by AssemblyAI · 506.7KUniversal-3 Pro by AssemblyAI · 547.2KUniversal-3 Pro by AssemblyAI · 590.1KUniversal-3 Pro by AssemblyAI · 628.7KUniversal-3 Pro by AssemblyAI · 577KUniversal-3 Pro by AssemblyAI · 520.4KUniversal-3 Pro by AssemblyAI · 457.8KWhisperAPI · 17.8KWhisperAPI · 25.7KWhisperAPI · 26.6KWhisperAPI · 19.2KWhisperAPI · 23.8KWhisperAPI · 25.8KWhisperAPI · 24.8KWhisperAPI · 24.7KWhisperAPI · 27.3KNov '25DecJan '26FebMarAprMayJunJulAug
Pricing
Model
Freemium
Freemium
Freemium
Starting price
Free tier
$10per month · free tier available
$4per month · free tier available
Free tier
Free trial
–
API access
–
–
Plans
Free Trial FreePay-as-you-go Universal-2 $0.15/moPay-as-you-go Universal-3.5 Pro $0.21/mo
Free Trial FreePay-As-You-Go (40 credits) $10Pay-As-You-Go (100 credits) $20Pay-As-You-Go (200 credits) $30+1 more
Free FreeStandard $4/moPro $8/moUnlimited $14/mo
Capabilities input → output
Input
Audio
AudioVideo
AudioText
Output
Text
Text
Text
Skill level
Advanced
Advanced
Beginner-friendly
Categories
Development & CodeVoice & SpeechAI APIAI Transcription
Voice & SpeechWriting & ContentAI Subtitle GeneratorAI Transcription
Voice & SpeechWriting & ContentAI TranscriptionAI Writing Assistants
Tasks what each tool can do · 1 shared · core   partial
Tasks covered
3
5
7
Transcription
APIs
–
Podcast transcription
–
Audio video transcription
–
–
Chrome extensions
–
–
Video transcription
–
–
Voice writing
–
–
Dictation
–
–
Grammar checking
–
–
Paraphrasing
–
–
Writing
–
–
Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 0
▲ 0
▲ 1
Saves
0
0
0
Reviews
0
0
0
Prompts
0
0
0
Verified listing
–
–
–

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.