p/proof-by-sparkloop
The first referral tool for newsletters
Louis Nicholls

Newsletter Radar by SparkLoop — Match with relevant newsletters & grow faster together, free

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The easiest way to discover thousands of relevant newsletters your audience already loves. Match with top newsletters in your space... and recommend each other to grow faster together. We've already driven 10m+ engaged new readers to 10k+ newsletters!
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Louis Nicholls
Hey Product Hunters! Louis, cofounder of SparkLoop here 👋 Two years ago we launched Upscribe — the first newsletter recommendations network. And it has grown to become hands-down the easiest way to grow your newsletter for free. We've helped top newsletters like Morning Brew, James Clear, The Hustle and thousands more add over 10 MILLION (!) high quality, engaged new subscribers. But — if your newsletter's not quite as big and popular as Morning Brew or The Hustle (yet) — it can be super hard to find the right newsletters to partner up with. That's why we're launching Newsletter Radar today. In just a few clicks, you can: 1. See a list of all your audience's favorite newsletters (ranked by how many subscribers you have in common) 2. Discover thousands more newsletters that our algorithm thinks are relevant to your audience 3. And invite the ones you like best to partner up with you on free recommendations The result: In less than 15 minutes, ANY newsletter should be able to find at least 5-10 (but really more like 50+) perfect newsletter partners, and start growing 3-10x faster by recommending each other. One of my favorite things about Newsletter Radar (and Upscribe) is that it works with 25+ newsletter platforms (including beehiiv and ConvertKit). So you can discover 100% of the very best newsletters you should be partnering up with... not just the 0.5% who happen to use the same newsletter platform you do! Happy to answer any questions 🥳
Louis Nicholls
@owenfar Great idea 😉 I wouldn't be surprised to see a feature like that in the very near future!
Pradhumn Vijayvargiya
@louisnicholls_ As a user does it also help manage current NL subscriptions? Would be lovely to see. All the best for the launch.
Joseph Abraham
@louisnicholls_ Cheers to the team behind this! Wishing you all thebest on this new adventure. What are you most excite about with this launch?
Louis Nicholls
@kjosephabraham tysm! I'm most excited to see people sharing their matches. So many people saying "wow, I didn't realise my newsletter had so much in common with newsletter X..."
Lauren Brill
@louisnicholls_ and his team are angels for Entrepreneurs. Their product is a gamechanger for those looking to grow their audience and brand and thus new product is just extension of the incredibly product they have already built! Plus, everyone who works there is always helpful and nice. Make sure you click around on the site too. Sometimes they post podcasts and other informative stuff that provides great strategic ideas. Matching with newsletters in your space will enhance your experience with their product even more because your opt-in rate increase a lot!
Germán Merlo
Awesome man! I know how hard can be properly find right newsletters that mach with our audience, so I'm very glad to see you helping on this. And wish you all the best on this impressive launch!
Derek
This looks amazing 😻 and that’s a great demo video 🎥 After inbound traffic, the #1 growth channel for my newsletters has been cross promotion between them. Driving traffic to your sites and then cross promoting with newsletters helps create a flywheel.
Louis Nicholls
@derkolstad that's awesome to hear and thanks for the kind words!
Aleksa Mitrović | Hyperaktiv.ai
@louisnicholls_ congrats on the launch. This something we will test soon as newsletter partnership is a channel we want to explore for our GTM
Jonathan Viet Pham
Congrats to the SparkLoop team on launching Newsletter Radar 👏! This is an amazing tool for discovering and collaborating with relevant newsletters—looking forward to seeing how it helps creators grow their audiences even faster!
Robby Miles
I love this. It's so great to be able to see what other publications my audience (and my client's audiences) are reading so we can do research and strategic outreach. I can see this leading to some incredible long-term partnerships that can help the entire newsletter and creator economy grow.
Louis Nicholls
@robbymiles totally! Stoked you're finding it useful. Cant' wait to see where we can take it!
Oscar Sanchez
I have using products from Louis for a while and the quality and dedication area guarantee. I am looking forward to see the evolution of this new product.
Brian Meert
I've really been impressed with Sparkloop and how their system works. This new tool that lets you see the actual size of audience in common is a game changer. Its a powerful feature that helps you focus your efforts on the audiences that matter most to you.
Louis Nicholls
@brian_meert1 thank you so much for the support. Pumped to help you grow!
Matt Brady
The SparkLoop team is always making great tools and products to help newsletter operators grow & monetize. Thanks for the great work & keep it up!
Louis Nicholls
@matt_brady2 appreciate it — means a lot coming from smart newsletter guy like yourself!
Erwin Dwight
Congrats on another fantastic tool! Been poking around, and it's been pretty effective in helping grow my subscriber. Congrats again Louis and team!
Louis Nicholls
@erwindwight thanks so much. Excited to help you grow!
Shushant Lakhyani
I hope more newsletter creators get to know about this. Congratulations on the launch!
Hamad Amir
I am thinking about launching my first newsletter campaign in October for my product launch. This came at the perfect time! Congrats on your success and launch!
Colton Sakamoto
This is AWESOME! I absolutely love the Newsletter Radar. Really helps me find other newsletters that my audience may like. The best part is how easy it is to use. Incredibly helpful.
Tiss Tim
This is really a great idea. congratulations on your new launch. I wouldn't be surprised to see a feature like this in near future
Kyrylo Silin
Hey Louis, I'm interested in how you ensure the quality of matches. Are there any metrics you use beyond shared subscribers? For niche newsletters, how well does the system work in finding relevant partners? Congrats on the launch!
Louis Nicholls
@kyrylosilin thanks for the question! shared subscribers is a really great indicator — especially for super niche newsletters. But we also look at stuff like audience demographics (gender, age, income), location, and topics/interests too.
Matevž Mak
Great idea, @louisnicholls_! I’m subscribed to quite a few newsletters myself, and this seems like a fantastic solution. I’ll definitely check it out! Q: Do you offer a feature where someone can input the name of a newsletter they’re subscribed to, and get recommendations for similar newsletters with the same quality?
Louis Nicholls
@matevz_mak not yet, but we have something very similar launching soon!
Nathan Barry
This is really exciting! I love seeing the results already so quickly after launch.
Bilal Budhani
Really excited to see how this feature generates synergies and help the newsletters to grow.
Ramli John
Hey Louis, congrats on the launch! This is going to be a game-changer.
Abhay Talreja
hey @louisnicholls_, big props on launching newsletter radar! love the concept, it's like tinder for newsletters, making connections easier to our target audience.