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Folderly

Make the inbox your only destination folder

★★★★★ 5.0/5
FactScore™ 84.5
VS

LangSmith

Build and deploy LLM applications with confidence

★★★★★ 4.8/5
FactScore™ 63

Updated February 2026

Folderly LangSmith
Rating 5.0★ 4.8★
Reviews 48 19
Pros 17 16
FactScore™ 84.5 63

FactScore™ Comparison

FactScore™ weighs both quality (rating) and popularity (reviews) for a fairer ranking than stars alone.

👑
84.5
Folderly FactScore™
★ Folderly wins on FactScore™
63
LangSmith FactScore™

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 setup

Both tools — Pros

—

Only in LangSmith — Pros

Monitoring AI model performance Chain sequence debugging Evals Annotation queues CI/CD integration Comprehensive visibility Datasets Easy to use Flexibility outside LangChain LangGraph Metadata filtering Python SDK Real-time analytics Time-saving Tracing tools Versioning

Only in Folderly — Cons

—

Both tools — Cons

—

Only in LangSmith — Cons

Filters not persisted in URL UI issues with large datasets

Details

Folderly LangSmith
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 N/A
Website folderly.com www.langchain.com

Who Should Pick Which?

Choose Folderly if...

  • Email deliverability
  • User-friendly interface
  • Spam prevention

Choose LangSmith if...

  • Monitoring AI model performance
  • Chain sequence debugging
  • Evals

With a FactScore™ of 84.5 vs 63, Folderly leads in community reception. Folderly uniquely offers Email deliverability and User-friendly interface, while LangSmith stands out for Monitoring AI model performance and Chain sequence debugging.

3

What Users Say

Folderly

S
Sofiia Nov 20, 2023
★★★★★

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...

D
Dariia Nov 6, 2023
★★★★★

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...

M
Michael Nov 7, 2023
★★★★★

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...

LangSmith

D
Dan Jul 16, 2025
★★★★★

We started building Ting without LangSmith and we were flying blind. Diagnosing issues downstream felt like guesswork. Since bringing LangSmith in, we’ve been able to trace problems through the ent...

K
Kyle Jun 23, 2025
★★★★★

We absolutely could not build this product with LangSmith for traces, datasets, annotation queues, and evals. We've become big power users! I use to build AI apps before nice tracing tools like thi...

K
Kanishk Aug 16, 2025
★★★★★

Promptius <3 Langchain + Langgraph + Langsmith, this combination has been instrumental in building Promptius in the past 5 months! The abstractions provided by Langchain and Langgraph make building...

Frequently Asked Questions

Which is better, Folderly or LangSmith?

Based on FactScore™, Folderly leads with a score of 84.5 vs 63. Folderly has a higher rating of 5.0★ compared to 4.8★.

What are the pros of Folderly compared to LangSmith?

Folderly uniquely offers: Email deliverability, User-friendly interface, Spam prevention, Comprehensive solution, Robust features.

What are the pros of LangSmith compared to Folderly?

LangSmith uniquely offers: Monitoring AI model performance, Chain sequence debugging, Evals, Annotation queues, CI/CD integration.

Is Folderly better rated than LangSmith?

Folderly is rated 5.0★ from 48 reviews. LangSmith is rated 4.8★ from 19 reviews.

What is the FactScore™ of Folderly and LangSmith?

FactScore™ weighs rating and review volume together. Folderly scores 84.5 and LangSmith scores 63.

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