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%
Recommended in 13 of 13 months
- November 2025: recommended
- December 2025: recommended
- January 2026: recommended
- February 2026: recommended
- March 2026: recommended
- April 2026: recommended
- May 2026: recommended
- June 2026: recommended
- July 2026: recommended
- August 2026: recommended
- September 2026: recommended
- October 2026: recommended
- 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” - Comment from 13 Oct 2026 in “Thunderbird for iOS”
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” - Comment from 15 May 2026 in “The era of 15GB free Gmail storage is ending”
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” - Comment from 7 Oct 2026 in “Penguin Mail – open-source Rust email client for Linux with AI”
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.
| Product | Recommend | Criticize | Approval | Months | Owned | Badge |
|---|---|---|---|---|---|---|
| Mozilla ThunderbirdThis page | 210 | 155 | 58% | 13 | 20 yrs12 owners | — |
| Microsoft Outlook | 117 | 403 | 23% | 12 | 20 yrs8 owners | — |
| Apple Mail | 57 | 88 | 39% | 12 | 10 yrs9 owners | — |
| Penguin Mail | 14 | 13 | 52% | 1 | — | — |
| GNOME Evolution | 13 | 3 | 81% | 7 | — | Approved |
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.”
“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.”
“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.”
“still the best all around email/CardDAV/CalDAV client it seems, despite being unreasonably heavy”
“Thunderbird is a rare counter-example of an open source project that manages to maintain a significant staff through donations.”
“Thunderbird on the other hand feels wrong somehow, and the recent UI "modernization" didn't do much to change that.”
“I was even loading up extremely old versions of Thunderbird to see if I could import to that and then upgrade”
“you can customize the Firefox (and Thunderbird for that matter) UI fairly significantly with userChrome.css”
“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.”
“I've donated to thunderbird since they made a promise that won't go into other weird/stupid mozilla ventures.”
“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.”
“Composing a message is a normal that you can manage with your window manager and have multiple instances of”
“If all of your users customize extensively the moment they get your hands on the software that means your defaults suck.”
“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.”
“I think settings were a horrible mess, but after that UX sending/receiving email were great.”
“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.”
“Thunderbird is a notable pain when it comes to an inability to reliably export/import your user profile to other machines.”
“You can export entire gmail history with takeout and import the history locally to thunderbird”
“Use something like Thunderbird to move all your emails off their server and onto Thunderbird locally.”
“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.”
“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”
“there are no open bug reports for recent versions, so it has been totally obliterated by a rewrite and subsequent fixes”
“My biggest complaints with it are that the profile configuration is not portable, and that the UI is too cluttered with features.”
“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”
“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”
“I've found it generally "just works" and gets out the way, which is exactly what I want in an email client.”
“Works perfect, I even migrated my Windows install to Linux just by copying the data folder, absolutely seamless.”
“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”
“I was consuming RSS through Thunderbird around that time as well and thought it was really good.”
“The email-style user interface is also familiar, and you can set up filters to ignore or star certain stories.”
“This is a good idea. I use Thunderbird only for a small number of feeds I want to read every post from.”
“You might think Thunderbird would have an import tool for that, but it's been so many years it didn't survive”
“its lack of hability to use microsoft outlook protocol for e-mail and calendas, always keeped me from use it”
“There's to my knowledge no other mail client besides maybe mutt that offers more features and flexibility.”
“Much better way for continous incremental backups is IMAP client that locally mirrors incomming emails”
“Thunderbird is the only MOZ product that I still use daily - almost at par with Mail.app if not more”
“you have all your emails with you, even without internet, even when aws/azure/cloudflare/... fails”
“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.”
“beat the pants off of Outlook in features, spam detection, IMAP support and a bunch of other things.”
“Nobody wants anything from Mozilla except Firefox/Thunderbird to be high-performance alternatives to Chrome/Outlook”
Counts come from 1,795,640 Hacker News comments, November 2025 to November 2026. How we count. Report a mistake.