Dev tools · alternatives · 2026
24 alternatives to I built a service to detect invalid and malicious email addresses
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…
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. I built a service to detect invalid and malicious email addresses launched in 2022; newer entries below may have overtaken it.
- 1
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 · its alternatives →
- 2
AhaSend▲132I'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…
2024 · ahasend.com · its alternatives →
- 3
Public datsets made with https://getomni.ai/. Contribute to getomni-ai/datasets development by creating an account on GitHub.
2024 · github.com · its alternatives →
- 4
A fun project that I built to try out R1 Distill Llama 70B. Enjoy :)
2025 · hn-wrapped.kadoa.com · its alternatives →
- 5
Hey HN, I'm Chris, CTO of Knock (https://knock.app). We built email.info because every developer we talk to asks the same question: which email provider should I use? The existing resources are mostly vibes — "Best of" listicles, anonymous Reddit threads, or LLM answers trained on that same content. Objective performance data is always missing. Knock is a notification infrastructure platform, so we send billions of API requests to downstream email providers every year. We aggregated that data into a public dashboard covering 10 providers (SendGrid, Postmark, Resend, Mailgun, Amazon…
Mar 2026 · knock.app · its alternatives →
- 6
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 · its alternatives →
- 7IB
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 · its alternatives →
- 8RO
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 · its alternatives →
- 9
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 · its alternatives →
- 10AP
Hello! I’ve been reading Hacker News for years and have a bad habit of favoriting articles but never actually going back to read them. I finally built hnbuffer to scratch my own itch and help me work through that backlog. I also mainly built this as an excuse to learn/use some of the languages/frameworks/tools since I have another backlog of things I wanted to try too. It syncs your favorites into a queue with a reader mode and swipe gestures. The streak tracking is something I'm still experimenting with. Note: It requires an HN login to scrape the favorites list (credentials…
2013 · hnbuffer.com · its alternatives →
- 11
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 · its alternatives →
- 12
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 · chrome.google.com · its alternatives →
- 13SP
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 · its alternatives →
- 14
Email List Cleaning doesn't have to be expensive
2023 · campaignkit.cc · its alternatives →
- 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 · its alternatives →
- 16
AttackerView▲13Last week I wrote about building a scanner that writes its own exploits. A cron job runs Claude Code every night, it reads new CVEs, writes proof-of-concept checks, tests them against vulnerable and patched Docker instances, and opens PRs. I review and merge in the morning. That post was about how t
Feb 2026 · attackerview.com · its alternatives →
- 17
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 · its alternatives →
- 18
A little toy HN client for the desktop that I've been playing around with this week.
2022 · github.com · its alternatives →
- 19
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 · its alternatives →
- 20MN
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 · its alternatives →
- 21WW
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 · its alternatives →
- 22HA
Hello HN! Here's my November Startup Sprint project (coded in two days). http://hackerlunch.com It allows you to post your lunch plans and lets other hackers join you. I built this because I often see HN users are interested in meeting each other if they are in the same area. I am not a coder, so this version is very rough. If people use it, I will work with others to build a more polished version. I would love some feedback. What do you think? Is this something you will be using?
2010 · hackerlunch.com · its alternatives →
- 23HC
I was inspired by the notification summaries on iOS 18 and really liked the idea of AI giving you a quick preview of the content before going to the content. I applied that to HN and built a Chrome extension that summarizes the sentiment and content of HN comments and previews it right next to the stories on the homepage. Makes it so much easier to decide whether I want to delve into the HN comments of a story. It gave me a chance to play with Gemini 1.5 Flash-8B which has been great. Super fast, super cheap, huge context and does a great john on basic tasks like summarizing comment threads.…
2024 · its alternatives →
- 24
Hey HN, I built HN500 because I wanted a no-fuss way to stay updated on major HN stories — especially after taking time off. It’s a newsletter and a catch-up tool with a few handy features: Set your own point threshold (250/500/750/1000) to get only the most upvoted posts. - Choose daily or weekly email updates. - Each email includes 3 random stories to help surface underrated gems. - The catch-up page lets you filter by points, time range, sort order, and more — great if you’ve been away for a while. It’s free, lightweight, and designed to stay out of your way. Feedback is…
2025 · hn500.azurewebsites.net · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →