Folderly
Make the inbox your only destination folder
Langfuse
Open Source LLM Engineering Platform
Updated February 2026
| Folderly | Langfuse | |
|---|---|---|
| Rating | 5.0★ | 5.0★ |
| Reviews | 48 | 41 |
| Pros | 17 | 18 |
| FactScore™ | 84.5 | 81.2 |
FactScore™ Comparison
FactScore™ weighs both quality (rating) and popularity (reviews) for a fairer ranking than stars alone.
Pros & Cons
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 setupBoth tools — Pros
—Only in Langfuse — Pros
LLM observability Open source Detailed tracing Monitoring capabilities Cost-effective Easy to integrate Free tier SDK availability Seamless integration Debugging tools Fast iterations Insightful analytics Community engagement Detailed analytics Excellent UI Flexible architecture Open API Robust telemetryOnly in Folderly — Cons
—Both tools — Cons
—Only in Langfuse — Cons
—Details
| Folderly | Langfuse | |
|---|---|---|
| Categories | Email marketing, Marketing automation platforms, Safety and Privacy platforms, AI Infrastructure Tools | AI Infrastructure Tools, AI Metrics and Evaluation |
| Platforms | Web | Web |
| Became Popular | November 26, 2020 | August 20, 2023 |
| Website | folderly.com | langfuse.com |
Who Should Pick Which?
Choose Folderly if...
- Email deliverability
- User-friendly interface
- Spam prevention
Choose Langfuse if...
- LLM observability
- Open source
- Detailed tracing
With a FactScore™ of 84.5 vs 81.2, Folderly leads in community reception. Folderly uniquely offers Email deliverability and User-friendly interface, while Langfuse stands out for LLM observability and Open source.
What Users Say
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...
Langfuse
Without Langfuse, we would have been flying blind with our drafting agent. This platform is critical not just for measuring performance, but for understanding exactly what context gets pulled into ...
So excited to see Langfuse go live — we've been a happy user for 4 weeks now. Most detailed latency and analytics in the market. Highly recommend for anyone using complex chains or with user-f...
We’ve been unsung Langfuse for 2 months now. It’s easy to integrate and makes it simpler for us to monitor & debug LLM requests during development and beyond.
Frequently Asked Questions
Which is better, Folderly or Langfuse?
Based on FactScore™, Folderly leads with a score of 84.5 vs 81.2. Folderly has a higher rating of 5.0★ compared to 5.0★.
What are the pros of Folderly compared to Langfuse?
Folderly uniquely offers: Email deliverability, User-friendly interface, Spam prevention, Comprehensive solution, Robust features.
What are the pros of Langfuse compared to Folderly?
Langfuse uniquely offers: LLM observability, Open source, Detailed tracing, Monitoring capabilities, Cost-effective.
Is Folderly better rated than Langfuse?
Folderly is rated 5.0★ from 48 reviews. Langfuse is rated 5.0★ from 41 reviews.
What is the FactScore™ of Folderly and Langfuse?
FactScore™ weighs rating and review volume together. Folderly scores 84.5 and Langfuse scores 81.2.
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