Alternatives
Products that do what I built a service to detect invalid and malicious email addresses does
Hello HN, around October last year, I started to work on campaignkit.cc as a side project. It is a service to detect invalid and malicious email addresses. You can upload text files, and use the REST API or direct integration to retrieve a detailed report for each email address. End of March I added Stripe Payments and got my first paying customers via SEM. A coworker suggested starting a Show HN thread, so here we are :) I used golang for the backend since I wanted something lightweight with fast compilation times (coming from scala). For the frontend, I'm using Next.js and TailwindUI. On…
- 1IM
Hi all! Excited to share cc.dev after months of work and refinement. The idea for this product came from trying to do email marketing for my side project, CubeDesk, a site where Rubik's Cube enthusiasts can time themselves, race with one another, train algorithms — it's a fun niche! With over 40k users, sending even a single campaign was becoming expensive with MailChimp. I knew AWS SES would be much cheaper, but it’s just an API with none of the other necessities you need for a robust email marketing platform. Beyond cost, I was also frustrated with having to make sure my database was…
2023 · cc.dev
- 2SHShow HN▲14
Hi, i was wondering what the HN community thinks of this email tone check application? Do you think this can be done better with open-source? Disclaimer: I am neither a founder or an employee at the company. Just someone who had a similar idea.
2011 · tonecheck.com
- 3DY
A fun project that I built to try out R1 Distill Llama 70B. Enjoy :)
2025 · hn-wrapped.kadoa.com
- 4MA
Hey HN, I'm a longtime reader and this is my first Show HN (exciting!) It's a collaboration between me and two friends, and we're building this upon another app we made called EmailYak, an API to receive email. We're trying something new and releasing the documentation to an app while we're still building it. We'd love feedback. Do you belong to any of these categories? 1) You've built an app with two distinct groups of users (say, people with cars and those looking for a ride) and they were able to communicate with each other. Did you expose personal email addresses? Did you send…
2011 · messagify.com
- 5AN
Hey HN! I'm excited to share a tool I've been working on - a native Hacker News reader built with Rust and egui. Here's a screenshot: https://github.com/haojiang99/hacker_news_reader/blob/main/s.... As a daily HN reader, I've always struggled with keeping track of interesting posts I want to read later. Browser tabs pile up, bookmarks get forgotten, and I lose track of what I've already read. I needed a way to: 1. Browse HN efficiently (across all sections - hot, new, show, ask, jobs, best) 2. Quickly mark posts as "todo" for later reading 3. Mark posts as…
2025 · github.com
- 6IB
Hey HN community, I built a tool that helps optimize your post for hitting the first page of Show HN. How it works: I used a Hugging Face dataset of all Hacker News posts from the past 3 years and trained a model that predicts how successful your post might be. There's still a lot of randomness on HN, so nothing is guaranteed, but the tool helps optimize your post for higher odds. A couple of interesting findings: - GitHub repo links work x3 better than regular domains - Open-source tools have a steady virality rate (13.9% - one of the highest) - "I built" outperforms "We built" - Using…
May 2026 · wannalaunch.com
- 7IM
Primarily built this to learn how NextJS works and also a bit about Tailwind CSS. Also has request caching using the WebCache API + expiration which is quite a hacky implementation. Let me know what you think! Source is at https://github.com/say4n/hn, pull requests welcome!
2023 · hn.sayan.page
- 8IM
Hey HN, I’m a solopreneur and have been in the SaaS space for the past 3 years. My last 3 startups failed, and a common challenge in all of them was figuring out how to reach my audience. Recently I started with cold outreach (its a struggle, since I dont have much experience with marketing). I am finding leads mainly using exa.ai websets (web vector search, extremelly good for multiple use cases, recommend checking them out) and then sending them through smartlead. I ran the campaign for the past 30 days and 12-15% emails always bounced. This wasted my email credits & chances of reaching…
2025 · verifyemailai.com
- 9HM
2018 · hnmail.io
- 10IO
2 months ago I launched a service that sends email alerts when you get a new comment/reply on Hacker News. I've only been able to acquire 6 users since releasing it (°ー°〃) I tried promoting it here (duuh), Reddit, and LinkedIn. Optimized it for SEO (ranking 3rd on my target keywords). All with limited success. So I've decided to open-source it! Links to... - frontend: https://github.com/mihailthebuilder/hackernewsalerts-fronten... - backend: https://github.com/mihailthebuilder/hackernewsalerts-backend I'm still using it for myself, since there's…
2024 · github.com
- 11IV
Hi HN,<p>In my spare time (evenings and weekends) I've built 3 products which have been relatively successful even with little advertising (only google ads budgeted at $30 per day). The latest one is WcfStorm.Rest; which is a REST service test client. I built it because I found that the current tools did not have the features I wanted such as, intellisense when working with HTTP headers, syntax highlighting for JSON messages, etc.<p>I'm continually trying to improve these products and would very much love get your feedback. Every suggestion is welcome!<p>(My apologies…
2012 · wcfstorm.com
- 12FH
Download: https://chrome.google.com/webstore/detail/hapackcnjagkljgfjlgonohbabnfgopc Source: https://github.com/ImFatYoureFat/follow_hackers I built this extension this past weekend. It uses Javascript (obviously), python (Flask) and Redis. I would love to hear any comments or suggestions.Thanks.
2012
- 13TE
I'm the founder of AhaSend. We've built a transactional email service specifically for developers, with a Pay-As-You-Go pricing model ($0.50 per 1,000 emails) and up to 70% volume discount for platform partners. While there are many ESPs out there, we focused heavily on the Developer Experience to solve the pain of building and testing email flows: * The CLI: Heavily inspired by the Stripe CLI, we built a tool that lets you develop and debug locally. You can listen to webhooks, trigger events, manage your domains, and send / list / debug messages directly from your terminal. * True…
Dec 2025 · ahasend.com
- 14SP
Hey, HN -- I just received the following email and I'm not sure what to do about it. Obviously I want to discourage requested-posting like this; is there some structured way that we can do that? One of the things I love about HN is how high the signal-to-noise ratio is relative to...pretty much the rest of the internet. I wouldn't ordinarily call someone out like this, but I want to innoculate HN against this sort of thing. ---- Hey doches, Not sure if it's conventional, but thought I'd ask anyway. Would you be open to posting about my product on Hacker News? I understand that similar to…
2022
- 15CE
Capturing emails always sucked. I don't want to add a full-blown newsletter API. That's why I've created my own tool. Would love your feedback on this
2024 · mailee.dev
- 16RO
I was lucky enough to have my site trending on Friday (https://news.ycombinator.com/item?id=25872922). It’s an icon site that lists open source icons. I wanted to share some stats on the results after 3 days. Worth noting was that I submitted it on a Friday morning (at which point I went for a walk and a coffee; eek). - 24,997 page views. I (embarrassingly) didn’t have GA set up when I first submitted it, so this is probably missing a few hundred page views - 21 “feedback” emails (half of which were spam). I assume such a high percentage of these were spam because my Feedback…
2021
- 17HV
Hey HN folks, Last week I released the first public version of 120 HN — a fully native Hacker News client for macOS. This week, I'm excited to share version 0.2.1 with some essential updates: The app now remembers window size, position, and sidebar state between sessions Improved AI summaries: more concise, relevant with link back to the comments, easier to read with short paragraph form. Minor tweaks to navigation and layout for a smoother experience Sneak peek: local LLM support is coming in the next release. As always, the app is free to use. Any suggestions or comments would be…
2025 · 120.dev
- 18HB
I thought building something that I would use while learning iOS SDK was a good idea so I built HN Browser. https://itunes.apple.com/us/app/hn-browser/id578535095?ls=1&mt=8 HN Browser is a simple app which lets you to read articles and comments on Hacker News. (no voting and writing comment yet) For the logo, I reached out to Joel Glovier(http://joelglovier.com) for his previous work on Hacker News logo(http://news.ycombinator.com/item?id=4731140) and he kindly granted the use of his work. It was really fun experience to collaborate and build a mobile app using iOS SDK. (although…
2012
- 19HA
Long time Hacker News lurker, first time Hacker News poster : ) I built a Hacker News reader app with NextJS and TailwindCSS that pulls item and user data from the hacker news api (https://github.com/HackerNews/API). This is my first time really building and launching something for users so I'd love any and all feedback. The roughest spots at the moment are the threading of comments and the fetching of posts on a user's page (lots of individual calls (async) for individual items rather than getting them in bulk from an endpoint like /v0/beststories). Let me know…
2022 · hacolyte.com
- 20AD
A little toy HN client for the desktop that I've been playing around with this week.
2022 · github.com
- 21IB
Hi HN, I'm excited to share a project I've been working on: UnwrapEmail(https://unwrap.email), an API designed to detect and verify disposable or temporary email addresses. Features: - Detect disposable email addresses - Extract labels from email addresses (e.g., Gmail) - Normalize addresses by removing labels or special characters (e.g., Gmail) - Validate MX records of domains - Check whether it’s safe to send to a given email to reduce bounces and maintain sender reputation Why I Built This: As the owner of an AI wrapper app, I've seen decent traffic thanks to SEO efforts + ads,…
2024 · unwrap.email
- 22MN
Hello HNers. I'm launching my new service, Certician, and I'd love some feedback from HN users. A while back, I asked if anyone knew of any good, simple tools or services for monitoring SSL certificates [1]. I didn't find any compelling services, so I decided to build one. I tried to keep it simple, since it's self-run and bootstrapped. I know my landing page needs help. It's a lot harder to distill down a service (even a simple one) into compelling, actionable copy than I thought! I have to work at my real job today, so I'll only be able to reply when I have time to take a break for a…
2011
- 23IM
Hello! I just made my first web app with Sinatra. It is a REST API that helps people add two-step verification to their websites or apps. I am a complete noob in web development so please criticize me and let me know how shitty this whole thing is. :) http://two-step.herokuapp.com/
2014
- 24WW
Over three months ago, I posted my book on HN and got tremendous +ve reponse. I am happy to inform that I have published the book to leanpub as per the comments I got on HN itself! It is pay as you go model, and the minimum is $0 because I wanted to contribute back to the FOSS Community
2016
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