Most people who go looking for a Slowly app alternative aren't unhappy with Slowly itself. They tried it, liked the idea of slow correspondence, and then noticed that what they actually wanted was slightly different: fewer strangers, more depth, or letters that don't depend on whether the other person feels like replying this month. Apps like Slowly solve one problem beautifully. Penvelope solves a neighbouring one.
This is an honest comparison of the two. We make Penvelope, so you know where we stand, but Slowly is a genuinely good app and pretending otherwise would be silly. The useful question isn't which is better. It's which experience fits the kind of correspondence you're hoping for.
What Slowly is, and what it gets right
Slowly launched in 2017 and has grown into one of the best-known pen pal apps in the world, with millions of users and a Google Play "Best Breakthrough App" award to its name. The idea is lovely: you exchange letters with real people in other countries, and each letter takes time to arrive, anywhere from about 30 minutes to 60 hours depending on how far apart you live. A letter from Japan to Portugal travels like a letter would.
You can browse profiles yourself or let the app auto-match you by shared interests, and you collect virtual stamps along the way, some free on special occasions, some bought in the stamp store. Photos and audio notes can be shared once both sides agree. The app is free on iOS, Android, and the web, with an optional Slowly Plus membership (about 29.49 EUR a year) that raises your limits and adds extras like editing a letter while it's still in transit.
Three things Slowly does genuinely well:
- Real people, real places. Your pen pals are actual humans around the world. A letter from a student in Seoul or a retiree in Lisbon carries a life you'd never otherwise touch.
- It's free. You can use Slowly for years without paying anything. The paid tier is optional, not a wall.
- The community and the collecting. The stamps, the map, the little rituals. If you enjoy the hobby side of pen-palling, Slowly has built a warm one.
Where Slowly can feel like work
The same openness that makes Slowly charming also produces its frustrations, and they're the ones former users mention most.
Ghosting is part of the deal. Your pen pal is a volunteer. People get busy, lose interest, or vanish mid-conversation, and a correspondence you'd invested three months in simply stops. Starting over with someone new means retelling your story from the first line.
The first letters are a lottery. Some exchanges click. Many open with "hi how are you" and never get past the weather. Finding a pen pal who writes long, thoughtful letters takes patience and a bit of luck, and until then you're doing a lot of polite screening.
It's still an app. A gentle one, but an app: a profile to tend, a map, stamps, notifications. If part of what draws you to letters is stepping away from apps entirely, Slowly asks you to manage one more.
None of this is a flaw in Slowly. It's the honest cost of a free community of strangers, and for many people it's a fair trade.
What Penvelope is
Penvelope takes the other road. Instead of matching you with many strangers, it gives you one pen pal, and that pen pal writes to you first. You tell us about yourself at signup, choose how often you want letters, and warm, personal letters start arriving in your email inbox on that rhythm. There is no app, no profile to maintain, and nothing to check.
Two things are different at the root, and it's fair to say them plainly. First, Penvelope is a paid subscription, from $11 a month, with a 7-day free trial. Second, your pen pal isn't a random fellow user: a real person writes and reviews every letter, with AI helping in the background mostly as memory, keeping track of what you've shared so that the exam you mentioned in March still comes up in June. If what you want is specifically to befriend strangers abroad, that's Slowly's territory, not ours. What you get in exchange here is reliability: a correspondent who always writes back, never ghosts, and writes about your life rather than making small talk about theirs.
The full walkthrough lives in our guide to how a pen pal subscription works, but the short version: letters arrive fortnightly, weekly, or as often as you like, replying is always optional, and the letters get more personal the more you write back.
Penvelope vs Slowly at a glance
| Slowly | Penvelope | |
|---|---|---|
| What it is | A free app for exchanging slow letters with strangers worldwide | A subscription that sends you personal letters from one dedicated pen pal |
| Your pen pal | Other users of the app, found by browsing or auto-match | One correspondent who writes first and remembers everything you share |
| Who writes | The person you matched with, when they feel like it | A real person writes and reviews every letter; AI helps as memory |
| Where letters arrive | Inside the app (iOS, Android, web) | Your email inbox; no app at all |
| Timing | Delivery delay based on distance, 30 minutes to 60 hours | Your chosen rhythm: fortnightly, weekly, or unlimited |
| Reliability | Depends on the other person; ghosting happens | Letters keep coming on schedule whether or not you reply |
| Price | Free; optional stamps and Slowly Plus (~29.49 EUR/year) | From $11/month; 7 days free, cancel anytime |
| Best for | Meeting real people around the world, the pen pal hobby | A steady, dependable correspondence on your own rhythm |
Choose Slowly if...
- Meeting strangers is the point. You want the surprise of a real person in another country, culture exchange, maybe language practice with a native speaker.
- You don't want to spend money. Slowly's free tier is genuinely usable, not a teaser.
- You enjoy the hobby layer. Stamp collecting, the world map, several parallel correspondences. If that sounds fun rather than tiring, Slowly will suit you.
- You have patience for the search. You don't mind slow starts and dead ends on the way to the one or two pen pals who stick.
Choose Penvelope as your Slowly app alternative if...
- You want the letter, not the search. No browsing profiles, no opening lines, no screening. Your first letter arrives within a couple of business days of signing up.
- Being remembered matters to you. Your pen pal writes about your week, your projects, the things you mentioned last time. The tenth letter knows things the first one didn't.
- You're done with apps. Letters land in the inbox you already have. Nothing to install, no profile to keep alive. We wrote more about that feeling in letters vs texting.
- It's for someone else. A parent living alone or a grandparent who would never navigate an app but reads email happily. Penvelope is often given as a gift for exactly this reason.
- You want a guarantee it continues. Replying is optional and nothing lapses if life gets busy. The correspondence waits for you and never ghosts you.
If you're not sure which side you're on, try Slowly first. It's free, and if you find a pen pal who writes long, faithful letters, you may not need anything else. If after a few weeks you're tired of short replies and vanished matches, Penvelope's 7-day trial will tell you quickly whether one steady correspondent is what you were actually looking for.
What about the price difference?
It's real, so let's not dance around it. Slowly costs nothing. Penvelope runs $11 a month for two letters, $17 for weekly letters, or $27 for unlimited correspondence, with two months free if you pay annually.
What the subscription buys is the part Slowly can't promise: someone whose job is to write to you well, every time, on schedule. No lottery, no ghosting, no starting over. Whether that's worth $11 a month depends entirely on how much the reliability matters to you, and that's a question only you can answer. The trial exists so you can answer it with real letters in hand rather than a sales page.
Frequently asked questions
Is Penvelope a good Slowly app alternative?
It depends on what you want from Slowly. If you want to meet many strangers around the world for free, stay with Slowly. If what you actually want is one steady correspondent who always writes back, remembers you, and sends long letters to your email on a rhythm you choose, Penvelope was built for exactly that.
Is Slowly free to use?
Yes. Slowly is free to download and use, with optional purchases: virtual stamps bought with Slowly Coins, and a Slowly Plus membership (about 29.49 EUR a year) that raises limits and adds extras.
Who writes the letters on Penvelope?
A real person writes and reviews every Penvelope letter before it reaches you. AI helps in the background, mostly as memory, so nothing you've shared gets forgotten. On Slowly, you correspond directly with other users of the app.
Can I use both?
Yes, and some people do. Slowly for meeting new people, Penvelope for the one dependable correspondence that arrives no matter what. If you're new to letter writing altogether, our 30 prompts for writing to a pen pal work on either.
The short version
Slowly is a free community of real strangers with all the serendipity and all the unreliability that implies. Penvelope is one pen pal who never misses, writing to your email on your schedule, for the price of a couple of coffees a month. Neither is the better product. They're answers to different wishes.
If yours is the second wish, the easiest way to check is to read a letter or two. Every plan starts with 7 days free at penvelope.co, and your first letter arrives within a couple of business days.