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Mozilla Thunderbird

The most recommended of 16 email clients

A long-lived, stable desktop email client with a deep feature set, offline local mail and RSS, though critics point to a cluttered UI, confusing settings and weak search.

A long-lived, stable desktop email client with a deep feature set, offline local mail and RSS, though critics point to a cluttered UI, confusing settings and weak search.

365 people gave an opinion

recommend it
210
criticize it
155
approval share
58%
Each figure is 5 people. RecommendsCriticizes

Recommended in 13 of 13 months

  1. November 2025: recommended
  2. December 2025: recommended
  3. January 2026: recommended
  4. February 2026: recommended
  5. March 2026: recommended
  6. April 2026: recommended
  7. May 2026: recommended
  8. June 2026: recommended
  9. July 2026: recommended
  10. August 2026: recommended
  11. September 2026: recommended
  12. October 2026: recommended
  13. November 2026: recommended (month in progress)

Owned for 20 years

Median of the 12 owners who said how long they have had it.

Each square is one year.

Why it doesn’t carry the badge

  • 210 people recommend itNeeds 10 or more, met.
  • 1.3 recommenders for every criticNeeds 2 to 1 or better, not met.
  • Recommended in 13 of 13 monthsNeeds 4 or more, met.

The same three rules apply to every product, and the badge can’t be bought. How the badge works

What people say about it

The reasons people give, with the number of comments that give each one. Open a reason to read what they said.

Why people recommend it

Each mark is one comment

  • Stable and just works

    “it's a stable product, that people can install extensions on. Save for security updates and keeping up with OS quirks, it doesn't need constant tinkering.”

    Comment from 9 Apr 2026 in “Help Keep Thunderbird Alive”

    “Works perfect, I even migrated my Windows install to Linux just by copying the data folder, absolutely seamless.”

    Comment from 9 Apr 2026 in “Help Keep Thunderbird Alive”

    “I've found it generally "just works" and gets out the way, which is exactly what I want in an email client.”

    Comment from 9 Apr 2026 in “Help Keep Thunderbird Alive”
  • Feature-rich and flexible

    “There's to my knowledge no other mail client besides maybe mutt that offers more features and flexibility.”

    Comment from 10 Jan 2026 in “I replaced Windows with Linux and everything's going great”

    “beat the pants off of Outlook in features, spam detection, IMAP support and a bunch of other things.”

    Comment from 19 Nov 2025 in “Thunderbird adds native Microsoft Exchange email support”

    “Thunderbird is the only MOZ product that I still use daily - almost at par with Mail.app if not more”

    Comment from 20 Nov 2025 in “Thunderbird adds native Microsoft Exchange email support”
  • Keeps email stored locally

    “Much better way for continous incremental backups is IMAP client that locally mirrors incomming emails”

    Comment from 30 Dec 2025 in “Stranger Things Creator Says Turn Off "Garbage" Settings”

    “Use something like Thunderbird to move all your emails off their server and onto Thunderbird locally.”

    Comment from 27 Apr 2026 in “Yahoo asking for subscription payment to send and receive emails”

    “you have all your emails with you, even without internet, even when aws/azure/cloudflare/... fails”

    Comment from 20 Nov 2025 in “Thunderbird adds native Microsoft Exchange email support”
  • Doubles as an RSS reader

    “The email-style user interface is also familiar, and you can set up filters to ignore or star certain stories.”

    Comment from 13 Mar 2026 in “Using Thunderbird for RSS”

    “This is a good idea. I use Thunderbird only for a small number of feeds I want to read every post from.”

    Comment from 13 Mar 2026 in “Using Thunderbird for RSS”

    “I was consuming RSS through Thunderbird around that time as well and thought it was really good.”

    Comment from 14 Mar 2026 in “Using Thunderbird for RSS”

What people warn about

Each mark is one comment

  • Cluttered, dated interface

    “the bloated mess that is Thunderbird that pushes on you a new way to configure it, a new layout and new workflows with every major update”

    Comment from 9 Apr 2026 in “Help Keep Thunderbird Alive”

    “My main gripe with TB is that it’s limited in how much you can change the display visually, which can be quite cluttered and same-y.”

    Comment from 20 Aug 2026 in “Show HN: Mail client optimized for self-hosted email across multiple domains”

    “My biggest complaints with it are that the profile configuration is not portable, and that the UI is too cluttered with features.”

    Comment from 9 Apr 2026 in “Help Keep Thunderbird Alive”
  • Confusing settings and configuration

    “I think settings were a horrible mess, but after that UX sending/receiving email were great.”

    Comment from 13 Jul 2026 in “Thunderbird Desktop settings research: what we learned from your feedback”

    “The damned thing struggles with a handful of basic stuff, it still has a config UI of which you can't tell head from tail”

    Comment from 9 Apr 2026 in “Help Keep Thunderbird Alive”

    “If all of your users customize extensively the moment they get your hands on the software that means your defaults suck.”

    Comment from 13 Jul 2026 in “Thunderbird Desktop settings research: what we learned from your feedback”
  • Weak search

    “Search on desktop thunderbird sucks too. I wanted to find an email with file://foo/bar, but it ignored the non latin characters and still couldn't find it.”

    Comment from 14 Oct 2026 in “Thunderbird for iOS”

    “Search doesn't work on mobile for me at all. On Desktop, I always have to fiddle with filters to find the message I want.”

    Comment from 13 Jul 2026 in “Thunderbird Desktop settings research: what we learned from your feedback”
  • Profiles hard to migrate

    “My biggest complaints with it are that the profile configuration is not portable, and that the UI is too cluttered with features.”

    Comment from 9 Apr 2026 in “Help Keep Thunderbird Alive”

    “Thunderbird is a notable pain when it comes to an inability to reliably export/import your user profile to other machines.”

    Comment from 3 Jun 2026 in “Gmail thinks I'm stupid, so I left”

Other email clients people recommend

The four most recommended other email clients, with the same counts for each, so you can compare like for like. The tick on each bar marks the 2 to 1 line the badge needs.

Mozilla Thunderbird compared with 4 alternatives
ProductRecommendCriticizeApprovalMonthsOwnedBadge
Mozilla ThunderbirdThis page21015558%1320 yrs12 owners—
Microsoft Outlook11740323%1220 yrs8 owners—
Apple Mail578839%1210 yrs9 owners—
Penguin Mail141352%1——
GNOME Evolution13381%7—Approved
See all 16 email clients, ranked

What people said

40 of the 437 comments that mention it, newest first. Each links to the original comment.

“Mozilla Thunderbird e-mail client, and Android k9 mail makes pgp/gpg public key handling fairly trivial.”

RecommendsComment from 15 Oct 2026 in “Why I Wrote PGP (1991, revised 1999)”

“I've been using Thunderbird all that time, and except for an improved default theme, they honestly haven't changed much about their core features.”

RecommendsComment from 14 Oct 2026 in “Thunderbird for iOS”

“Search on desktop thunderbird sucks too. I wanted to find an email with file://foo/bar, but it ignored the non latin characters and still couldn't find it.”

CriticizesComment from 14 Oct 2026 in “Thunderbird for iOS”

“still the best all around email/CardDAV/CalDAV client it seems, despite being unreasonably heavy”

MixedComment from 13 Oct 2026 in “Thunderbird for iOS”

“Thunderbird is a rare counter-example of an open source project that manages to maintain a significant staff through donations.”

RecommendsComment from 10 Oct 2026 in “Bitwarden Dual License Model”

“Thunderbird on the other hand feels wrong somehow, and the recent UI "modernization" didn't do much to change that.”

CriticizesComment from 7 Oct 2026 in “Penguin Mail – open-source Rust email client for Linux with AI”

“I was even loading up extremely old versions of Thunderbird to see if I could import to that and then upgrade”

MixedComment from 18 Sep 2026 in “I don't like passkeys”

“you can customize the Firefox (and Thunderbird for that matter) UI fairly significantly with userChrome.css”

MixedComment from 18 Sep 2026 in “One year of sponsored Servo development”

“I still use Thunderbird as my email client. If I could figure out a way to get it to turn off HTML mail I would.”

MixedComment from 9 Sep 2026 in “Lotus Notes and the dangers of starting from scratch”

“I've donated to thunderbird since they made a promise that won't go into other weird/stupid mozilla ventures.”

RecommendsComment from 31 Aug 2026 in “Google Has Removed MV2 Extensions from the Chrome Web Store, Including UBO”

“My main gripe with TB is that it’s limited in how much you can change the display visually, which can be quite cluttered and same-y.”

CriticizesComment from 20 Aug 2026 in “Show HN: Mail client optimized for self-hosted email across multiple domains”

“Composing a message is a normal that you can manage with your window manager and have multiple instances of”

MixedComment from 16 Aug 2026 in “Thunderbird's Desktop Calendar Visual Redesign”

“If all of your users customize extensively the moment they get your hands on the software that means your defaults suck.”

CriticizesComment from 13 Jul 2026 in “Thunderbird Desktop settings research: what we learned from your feedback”

“Search doesn't work on mobile for me at all. On Desktop, I always have to fiddle with filters to find the message I want.”

CriticizesComment from 13 Jul 2026 in “Thunderbird Desktop settings research: what we learned from your feedback”

“I think settings were a horrible mess, but after that UX sending/receiving email were great.”

MixedComment from 13 Jul 2026 in “Thunderbird Desktop settings research: what we learned from your feedback”

“Change it to Text instead, that works like you want. Still not ideal because in some cases after certain types of formatting it still reverts to Paragraph style.”

MixedComment from 8 Jun 2026 in “Thunderbird Littering My Home”

“Thunderbird is a notable pain when it comes to an inability to reliably export/import your user profile to other machines.”

CriticizesComment from 3 Jun 2026 in “Gmail thinks I'm stupid, so I left”

“You can export entire gmail history with takeout and import the history locally to thunderbird”

RecommendsComment from 15 May 2026 in “The era of 15GB free Gmail storage is ending”

“Use something like Thunderbird to move all your emails off their server and onto Thunderbird locally.”

RecommendsComment from 27 Apr 2026 in “Yahoo asking for subscription payment to send and receive emails”

“it's a stable product, that people can install extensions on. Save for security updates and keeping up with OS quirks, it doesn't need constant tinkering.”

MixedComment from 9 Apr 2026 in “Help Keep Thunderbird Alive”

“The damned thing struggles with a handful of basic stuff, it still has a config UI of which you can't tell head from tail”

CriticizesComment from 9 Apr 2026 in “Help Keep Thunderbird Alive”

“there are no open bug reports for recent versions, so it has been totally obliterated by a rewrite and subsequent fixes”

RecommendsComment from 9 Apr 2026 in “Help Keep Thunderbird Alive”

“My biggest complaints with it are that the profile configuration is not portable, and that the UI is too cluttered with features.”

CriticizesComment from 9 Apr 2026 in “Help Keep Thunderbird Alive”

“if you want those actual people to stay employed and continue working on the tool, it's in your best interest to do things like donate and talk/share about them”

RecommendsComment from 9 Apr 2026 in “Help Keep Thunderbird Alive”

“it takes two seconds to close it, if you can't spare two seconds of your life every year for something you get for free”

RecommendsComment from 9 Apr 2026 in “Help Keep Thunderbird Alive”

“I've found it generally "just works" and gets out the way, which is exactly what I want in an email client.”

RecommendsComment from 9 Apr 2026 in “Help Keep Thunderbird Alive”

“Works perfect, I even migrated my Windows install to Linux just by copying the data folder, absolutely seamless.”

RecommendsComment from 9 Apr 2026 in “Help Keep Thunderbird Alive”

“the bloated mess that is Thunderbird that pushes on you a new way to configure it, a new layout and new workflows with every major update”

CriticizesComment from 9 Apr 2026 in “Help Keep Thunderbird Alive”

“I was consuming RSS through Thunderbird around that time as well and thought it was really good.”

RecommendsComment from 14 Mar 2026 in “Using Thunderbird for RSS”

“The email-style user interface is also familiar, and you can set up filters to ignore or star certain stories.”

MixedComment from 13 Mar 2026 in “Using Thunderbird for RSS”

“This is a good idea. I use Thunderbird only for a small number of feeds I want to read every post from.”

RecommendsComment from 13 Mar 2026 in “Using Thunderbird for RSS”

“You might think Thunderbird would have an import tool for that, but it's been so many years it didn't survive”

MixedComment from 3 Feb 2026 in “Migrate Wizard – IMAP Based Email Migration Tool”

“its lack of hability to use microsoft outlook protocol for e-mail and calendas, always keeped me from use it”

MixedComment from 2 Feb 2026 in “Microsoft is walking back Windows 11's AI overload”

“There's to my knowledge no other mail client besides maybe mutt that offers more features and flexibility.”

RecommendsComment from 10 Jan 2026 in “I replaced Windows with Linux and everything's going great”

“Much better way for continous incremental backups is IMAP client that locally mirrors incomming emails”

RecommendsComment from 30 Dec 2025 in “Stranger Things Creator Says Turn Off "Garbage" Settings”

“Thunderbird is the only MOZ product that I still use daily - almost at par with Mail.app if not more”

RecommendsComment from 20 Nov 2025 in “Thunderbird adds native Microsoft Exchange email support”

“you have all your emails with you, even without internet, even when aws/azure/cloudflare/... fails”

RecommendsComment from 20 Nov 2025 in “Thunderbird adds native Microsoft Exchange email support”

“I got comfortable with Thunderbird. And when my friends who used Eudora had to migrate off of it, I set them up with Thunderbird, too.”

RecommendsComment from 19 Nov 2025 in “Thunderbird adds native Microsoft Exchange email support”

“beat the pants off of Outlook in features, spam detection, IMAP support and a bunch of other things.”

RecommendsComment from 19 Nov 2025 in “Thunderbird adds native Microsoft Exchange email support”

“Nobody wants anything from Mozilla except Firefox/Thunderbird to be high-performance alternatives to Chrome/Outlook”

MixedComment from 14 Nov 2025 in “I think nobody wants AI in Firefox, Mozilla”

Counts come from 1,795,640 Hacker News comments, November 2025 to November 2026. How we count. Report a mistake.