The best letter subscriptions for adults

The best letter subscriptions for adults are Letterjoy and History By Mail for real historical documents, Dear Holmes for a solvable mystery, The Flower Letters for genre romance, and Yours, From Ireland for a single continuous story grounded in real emigration history. Most other letter subscriptions on the market are built for children, which matters more than price once you notice it.

That last point is worth pausing on before any comparison, because it changes what “best” even means here. A subscription box for grandparents and a pen pal club aimed at an eight-year-old are both letter subscriptions in the strict sense, and neither is what most adult subscribers are actually looking for when they search this category.

Why so many letter subscriptions are built for children

Search “letter subscription” without the word “adult” attached and a large share of the results are aimed at readers under 14. The Adventure Letters is pitched at children roughly eight to 13, with envelopes addressed to the child by name and story mailings built around activities as much as plot. Pen Pals from the Past markets itself directly at young readers, with a low-cost first month designed to make the decision easy for a parent. Letters From Afar runs a similar model at a lower monthly price, following a travelling character who writes home from a new country each mailing, and services like Polar Pen Pal go further, connecting a child to a real family in the Canadian Arctic who writes back.

None of that is a criticism. These are well-built products doing exactly what they say on the label, and a nine-year-old who loves getting mail is well served by any of them. The point is narrower: if you searched for a letter subscription meant for yourself, or for a grown parent or grandparent, most of what you will find first was not designed with an adult reader in mind, and reading past that mismatch is the first real step in any honest letter subscription box review.

The best letter subscriptions for adults, by format

Strip out the children’s titles and a smaller, more specific group remains.

Letterjoy and History By Mail both work from the same idea: a reproduction of a document someone real actually wrote, paired with a short piece of context explaining who they were. Letterjoy runs the format weekly, with bundles priced from 49 dollars for a two-month, eight-plus letter starter up to 249 dollars for a full year of 52 or more letters across free USPS first-class postage, and six-month bundles let a subscriber choose a track such as military history, presidential history, or letters about writing from authors including Jane Austen. History By Mail runs a slower monthly rotation from 8.99 dollars a month, themes changing roughly every four letters, and its own marketing leans toward “curious minds of all ages” rather than any one age group, though the format, close reading of a real document and its context, rewards the patience an adult reader tends to bring to it.

Dear Holmes takes the format somewhere neither of those does. Built by Letterjoy in collaboration with the Sherlock Holmes publisher MX Publishing since 2018, it mails a case addressed to Sherlock Holmes in instalments, with clues arriving letter by letter until a subscriber can attempt to solve the mystery before Holmes’s own solution arrives in the final envelope. More than 40 cases have been produced since launch. It is the one option here built as a puzzle rather than a read, which makes it the strongest pick for an adult who wants to work at the letters, not just receive them.

The Flower Letters sits closest to a traditional novel. A subscriber chooses a story before it begins, genre options including a Second World War romance and a Wild West adventure, and pays 12.95 dollars a month or 155.40 dollars upfront for the full run, extras such as postcards and invented newspaper clippings arriving alongside the letters themselves. The company states its stories suit readers 12 and up, which puts it closer to the young-adult shelf than a strictly adult one, but the plotting and pacing read as genre fiction for a grown audience rather than a children’s activity box.

Where a subscription box for grandparents is a different purchase

A fifth category turns up constantly in these searches and deserves a direct answer rather than a vague wave: the subscription box for grandparents, built around monthly treats, self-care items, or a family newsletter rather than a letter to read. That is a different product solving a different problem, and worth comparing on its own terms rather than folding into a reading list. Subscription boxes for grandparents, compared covers that ground properly, including where those boxes are the better gift outright.

What historians cannot know

Letterjoy, History By Mail and Dear Holmes all lean on real archives, and it is worth being honest about what those archives can and cannot show. Ireland’s own record of the same period survives in a similarly uneven way. The National Archives of Ireland holds the Famine Relief Commission’s so-called Distress Papers, letters and petitions that poured into Dublin Castle from 1846 onward as more than 600 local relief committees formed across the country. The University of Galway’s Imirce archive, launched in March 2024, holds roughly 7,000 emigrant letters gathered by the historian Kerby Miller from the early 1970s onward, largely by placing newspaper notices asking families to send in whatever correspondence they had kept. Both collections exist because someone happened to keep a letter, or a government office happened to keep a file. What they cannot show is everything that was written and thrown away, which was almost certainly more.

Where a continuous story fits among the rest

Every option above hands a subscriber someone else’s finished words, whether the person who wrote them lived or was invented for the page. Yours, From Ireland works differently. It follows two people writing to each other rather than one voice writing outward: Patrick O’Donnell, the second son of a family in Ballycastle, north Mayo, with no land coming to him because it goes to his elder brother, sails for Boston in October 1847 and promises to send for Mary Cafferky, the girl he leaves behind. Her father has other plans, a widower up the road with good ground. A third road runs alongside theirs: the youngest brother in the family takes the cheaper crossing, to England, not America. None of them existed. The decade the letters cross, 1847 to 1857, did.

That structure, two people answering letters that are already weeks or months out of date by the time a reply arrives, is closer to how real Irish emigrant letters in the archives actually read than a single narrator moving a plot forward on their own. You can read the opening exchange in full, free, at the sample letter before deciding whether that particular shape of story subscription for grown-ups is the one you want.

Choosing between them

Match the format to what you actually want to do with the envelope. If you want to hold something a real person wrote and learn who they were, Letterjoy or History By Mail will serve you better than any story. If you want to work a mystery rather than simply read one, Dear Holmes is built for exactly that. If you want a genre novel with a plot you choose in advance, The Flower Letters delivers it well, with the caveat that its stated audience starts at 12 rather than firmly at adult. And if what appeals is two people, both invented but grounded in a real and difficult decade, writing past each other without knowing yet what the other has just lived through, that narrower shape is what a continuous correspondence like this one is for.

None of these are competing for the same reader on every count, and a fair comparison should end there rather than pretending one format wins outright. What they share is the same basic bet: that a letter, opened by hand, still does something a screen does not.

Sources and further reading

• Letterjoy, current bundle pricing, postage terms, and collection tracks, letterjoy.co/pages/pricing.
• History By Mail, subscription plans and format description, historybymail.com.
• The Flower Letters, FAQ covering story length, pricing, shipping, and stated reader age, theflowerletters.com/pages/faq.
• Dear Holmes and MX Publishing, background on the Sherlock Holmes letter-mystery collaboration launched in 2018.
• National Archives of Ireland, “Famine Records, Distress Papers and the Relief Commission,” research guide, nationalarchives.ie.
• University of Galway, Imirce digital archive of Irish emigrant letters and memoirs, launched March 2024, built from the Kerby Miller collection.