This is the closest thing to The Unsent Project on the internet. Letter to My Ex is a platform where people write open letters to former partners — things they wish they’d said, apologies, goodbyes, “I still love you”s. Letters are published anonymously and browsable by anyone. The emotional tone is almost identical to The Unsent Project, just without the color system.

If you want to write something longer than a text message — a full letter, a page, a stream of consciousness — this is your best alternative.

PostSecret is one of the original anonymous confession platforms — and one of the most powerful. People mail in handmade postcards with secrets they’ve never told anyone, and the best ones get published on the site and in books. It’s been running for over 20 years and the archive is vast and emotionally extraordinary.

The format is different from The Unsent Project — physical postcards rather than digital messages — but the emotional function is the same: saying what you couldn’t say out loud, anonymously, to the world.

Whisper is an anonymous social app where people share thoughts, confessions, and feelings they can’t say in real life — overlaid on images. It has a massive, active community and a strong emotional undercurrent of people expressing things about love, loss, longing, and regret.

It’s more social than The Unsent Project — you can get responses, likes, and reactions — which is either a feature or a drawback depending on what you want. If you want connection, Whisper delivers. If you just want to say something and let it go, it may feel like too much.

FutureMe lets you write a letter to yourself and schedule it to be delivered to your email at a future date — one year from now, five years, a decade. It’s a deeply personal and surprisingly emotional experience. Many people use it to write to the version of themselves that will eventually get over someone, or to document how they feel right now before time changes everything.

It’s more private than The Unsent Project (the letter goes to you, not a public archive), but the emotional purpose — processing feelings through writing — is the same.

750 Words is a private writing platform built on the idea that writing 750 words every morning — stream-of-consciousness, no editing, no audience — has measurable mental health benefits. It’s based on the expressive writing therapy principles that also underlie why The Unsent Project works emotionally.

Nothing you write here is public. It’s entirely for you. If you want the emotional benefit of writing without any possibility of being read, this is the best alternative on this list.

A lesser-known gem: Give Me Guidelines prompts you through a guided love letter — asking specific questions to help you articulate feelings you might not know how to start. The output is a personal, emotional letter that can be kept private or submitted anonymously. Great for people who want to write something heartfelt but don’t know where to begin.

Penzu is an encrypted personal journal app — think of it as a locked diary that lives in the cloud. It’s not public, it’s not anonymous in the social sense — it’s entirely yours. But for people who want to write unsent letters and keep them safe (and private, unlike The Unsent Project’s public archive), it’s excellent.

Write everything you never said. Read it later. Delete it if you need to. It’s your space.

Tumblr has a thriving, decades-old tradition of anonymous confessions and unsent letters. Search the tag #unsent letters or #things i never said and you’ll find thousands of posts — raw, emotional, unfiltered. You can post anonymously via an ask box, or create a side blog with no identifying information.

It’s not as clean or purposeful as The Unsent Project, but the community is real and the emotional resonance is genuine. It’s the wild, unstructured cousin of the same impulse.

Open Me is a digital time capsule platform where you write letters, upload memories, and set them to be opened at a future date — by yourself or by someone else. It’s particularly powerful for writing to someone you’ve lost, someone you’ve grown apart from, or the future version of a relationship.

Unlike The Unsent Project, you can address these to specific people (who receive them when the time comes) or keep them sealed forever.

The r/UnsentLetters subreddit is exactly what it sounds like: a community of people posting letters they never sent. It has hundreds of thousands of members and is active daily. You can post anonymously via a throwaway account, and the emotional range — love, grief, anger, forgiveness — is wide and human.

Unlike The Unsent Project, posts here can receive comments — which means you might get responses, sympathy, or recognition from strangers. Some find that comforting; others find it uncomfortable. Worth knowing before you post.