Surge for Mac
Weer
James
Charles Proxy
Cellist
HTTP Analyzer
mitmproxy
HTTP Headers allows you to quickly see the HTTP header information for the current URL.

Handwrytten
Scribeless
Postable
Letterflix
Handwrite
Send armor-piercing handwritten letters more easily than email -- straight from Salesforce. Get around gatekeepers, get noticed -- upgrade your outreach.

Which is more popular?
Based on our record, LetterFriend seems to be more popular. It has been mentioned 2 times since March 2021.
Website, pricing, platforms and company facts side by side.
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HTT
HTTP Headers
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| Website | en.wikipedia.org | letterfriend.com |
| Pricing | — | |
| Listed in |
What each product offers, as listed by its team.

Possible disadvantages
No features have been listed yet.
Walkthroughs and reviews on video.
Learn in 5 Minutes: HTTP Headers (General/Request/Response/Entity)
More videos
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How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using HTTP Headers and LetterFriend. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.

Tracking HTTP Headers since Mar 2021.
> In other words, a bit of a race to the bottom. Copied from another comment, but this is what I got from ~10 seconds googling. • https://www.handwrytten.com/ • https://www.scribeless.co/ • https://roboquill.io/ •... - Source: Hacker News / about 5 years ago
- https://letterfriend.com/ Lots of stuff like thank you notes, etc. We just wanted the addresses on the outside! - Source: Hacker News / about 5 years ago
When comparing HTTP Headers and LetterFriend, you can also consider the following products.

Advanced Web Debugging Proxy for Mac & iOS
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Handwritten notes straight from your device. Huge selection of cards or design your own. Handwriting service integrates with 1000's of apps.
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A HTTP protocol debugger with Chrome DevTools frontend interface
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Handwritten mailers stand out and grab attention. Send them as easily as a email.
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James is a HTTP Proxy and Monitor that enables developers to view and intercept requests made from...
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The easy, new way to write and mail cards
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