
Mailo
Superhuman
Soverin
Horde
ProtonMail
Mailpile
Teknik Mail
Email at its best, new from Basecamp.

Langfuse
Helicone AI
LangChain
Portkey
Braintrust
Humanloop
Braintrust.dev
Build and deploy LLM applications with confidence

Which is more popular?
Based on our record, HEY seems to be more popular. It has been mentioned 24 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | hey.com | langchain.com |
| Pricing | — | |
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What each product offers, as listed by its team.


Possible disadvantages
Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
LangSmith is recommended for AI developers, machine learning engineers, and businesses aiming to build, test, and optimize applications based on language models. It is particularly useful for teams that require robust evaluation tools and a streamlined process for managing and deploying language-driven applications.
Walkthroughs and reviews on video.
Hey Review: Why this $99 per year email is Superhuman's Most Exciting Challenger | Keep Productive
More videos
🦜🛠️ Getting started with LangSmith - Integrating with LANGCHAIN powered Web Applications & Chatbots
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using HEY and LangSmith. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Apple apparently told ProtonMail "out of the blue" that it was required to add an in-app purchase option to stay in the App Store. Similar to the situations with HEY and Wordpress earlier this year, ProtonMail had a...
We have no reviews of LangSmith yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


Seven gems to manage background jobs. The team looked at what they were running and said "this can't be right." That became the brief for Solid Queue. Rosa got picked for the project, built it in production at Hey first, iterated on it... - Source: dev.to / 3 months ago
Basecamp: After using clouds from both Amazon and Google extensively over the past 15 years, we finally had enough of the outrageous bills and the ever-increasing complexity. So in 2023, we pulled Basecamp, HEY, and five other heritage... - Source: dev.to / about 1 year ago
Attending the latest edition of Rails World and watching the talk by DHH made me realize that generating views on the backend with Rails was no longer synonymous with slow, ugly interfaces that do not care about UX. With Hotwire, through... - Source: dev.to / over 2 years ago
Tracking LangSmith since Jul 2023.
When comparing HEY and LangSmith, you can also consider the following products.

Mailo is an email client where you can send and receive emails to and from anyone with an email address.
Compare Mailo to HEY or LangSmith:

Langfuse is an open-source LLM engineering platform that helps teams collaboratively debug, analyze, and iterate on their LLM applications.
Compare Langfuse to HEY or LangSmith:



Soverin is the honest email service that doesn’t sell your data.
Compare Soverin to HEY or LangSmith:

Framework for building applications with LLMs through composability
Compare LangChain to HEY or LangSmith: