AssemblyAI
The best way to build Voice AI apps with one robust API
Folderly
Make the inbox your only destination folder
Updated February 2026
| AssemblyAI | Folderly | |
|---|---|---|
| Rating | 4.8★ | 5.0★ |
| Reviews | 25 | 48 |
| Pros | 14 | 17 |
| FactScore™ | 67.5 | 84.5 |
FactScore™ Comparison
FactScore™ weighs both quality (rating) and popularity (reviews) for a fairer ranking than stars alone.
Pros & Cons
Only in AssemblyAI — Pros
Accurate transcription Transcription API Easy integration Fast performance Sentiment analysis Excellent documentation Content moderation Multilingual support Real-time transcription Speaker diarization Auto chapters Developer experience Rich audio features Scalable APIsBoth tools — Pros
—Only in Folderly — Pros
Email deliverability User-friendly interface Spam prevention Comprehensive solution Robust features Customer support Email outreach optimization Email spam words checker DNS settings management Increased open rates AI-driven approach Best practices recommendations Blacklist monitoring Spam trigger detection Email infrastructure analysis Real-time monitoring Simple setupOnly in AssemblyAI — Cons
Autopay issues No card removal option Occasional transcription errorsBoth tools — Cons
—Only in Folderly — Cons
—Details
| AssemblyAI | Folderly | |
|---|---|---|
| Categories | AI Infrastructure Tools, Transcription | Email marketing, Marketing automation platforms, Safety and Privacy platforms, AI Infrastructure Tools |
| Platforms | Web | Web |
| Became Popular | August 4, 2017 | November 26, 2020 |
| Website | assemblyai.com | folderly.com |
Who Should Pick Which?
Choose AssemblyAI if...
- Accurate transcription
- Transcription API
- Easy integration
Choose Folderly if...
- Email deliverability
- User-friendly interface
- Spam prevention
With a FactScore™ of 67.5 vs 84.5, Folderly leads in community reception. AssemblyAI uniquely offers Accurate transcription and Transcription API, while Folderly stands out for Email deliverability and User-friendly interface.
What Users Say
AssemblyAI
When selecting a speech-to-text & audio intelligence provider for NeuraVid.io, we compared several options, including Deepgram, Rev AI, AWS Transcribe, and Whisper-based APIs. We ultimately chose A...
What sets AssemblyAI apart is its simplicity and seamless integration for transforming speech into meaningful text. Their API is easy to implement, providing highly accurate and fast transcription ...
What sets AssemblyAI apart is its simplicity and seamless integration for transforming speech into meaningful text. Their API is easy to implement, providing highly accurate and fast transcription ...
Folderly
I think Folderly is truly changing the game in the email deliverability industry, leaving warmup solutions in the dust 😍 It's more than diagnosing and applying a "patch." This solution fixes deliv...
I've been here since the early days of Folderly, witnessing its growth and development. With our ever-evolving platform, we're now proud to have helped hundreds of clients! Our Customer Success tea...
Proper email deliverability prepares and maintains the entire email infrastructure. Google Startups Fund backs Folderly to create a comprehensive deliverability solution. This includes managing dom...
Related Comparisons
Frequently Asked Questions
Which is better, AssemblyAI or Folderly?
Based on FactScore™, Folderly leads with a score of 84.5 vs 67.5. Folderly has a higher rating of 5.0★ compared to 4.8★.
What are the pros of AssemblyAI compared to Folderly?
AssemblyAI uniquely offers: Accurate transcription, Transcription API, Easy integration, Fast performance, Sentiment analysis.
What are the pros of Folderly compared to AssemblyAI?
Folderly uniquely offers: Email deliverability, User-friendly interface, Spam prevention, Comprehensive solution, Robust features.
Is AssemblyAI better rated than Folderly?
AssemblyAI is rated 4.8★ from 25 reviews. Folderly is rated 5.0★ from 48 reviews.
What is the FactScore™ of AssemblyAI and Folderly?
FactScore™ weighs rating and review volume together. AssemblyAI scores 67.5 and Folderly scores 84.5.
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