1
FiloMail
filomail.comAlso covers email tools · same kind of online tool
FiloMail combines email and to-dos across multiple accounts, with task reminders, thread summaries, and reply assistance.
Alternatives
The Best Thunderbird Alternatives in 2026
24 alternatives2 free · 5 open source
Looking for something like Thunderbird? Here are 24 alternatives, ranked by how closely they match it on purpose, features and platforms. Of these, 2 are free or have a free plan and 5 are open source.
About Thunderbirdthunderbird.net/en-US
VisitThunderbird combines email, calendars, and contacts in a customizable application.
Top picks at a glance
First suggestionFiloMailFiloMail combines email and to-dos across multiple…Free or freemium optionUseplaintextUse Plain Text explains the difference between plain-text…Open source optionTray IconSysTray-X adds a system tray extension to Thunderbird and…Another optionTwobirdTwobird combines email, notes, reminders, and to-do…
Quick comparison
| # | Alternative | Pricing | Open source | Platforms |
|---|---|---|---|---|
| 1 | FiloMail | — | Not stated | macOS, Web, Windows |
| 2 | Twobird | — | Not stated | Web |
| 3 | Betterbird | — | Not stated | Web, Windows |
| 4 | eM Client | — | Not stated | Android, iOS, macOS |
| 5 | i.ua | — | Not stated | Web |
| 6 | Privacy Config | — | Not stated | Web |
| 7 | ExtractMailAddress | — | Not stated | Web |
| 8 | Boomerang | — | Not stated | iOS, Web |
| 9 | Spike | — | Not stated | Web |
| 10 | Useplaintext | Free | Not stated | Web |
All Thunderbird alternatives
2
Twobird
twobird.comAlso covers email tools · same kind of online tool
Twobird combines email, notes, reminders, and to-do assignments in one inbox.
3
Betterbird
betterbird.euAlso covers email tools
An alternative build of Mozilla Thunderbird adds tuning and additional changes for its users.
4
eM Client
emclient.comAlso covers email tools · same kind of online tool
Use eM Client to manage email accounts from a desktop application on Windows or Mac.
5
i.ua
i.uaAlso covers email tools
I.UA combines Ukrainian email with weather, finance, radio and news on a portal homepage.
6
Privacy Config
codeberg.org/celenity/DoveAlso covers email tools
Dove provides Thunderbird configurations and modifications focused on privacy, security, usability, and user control.
7
ExtractMailAddress
extractemailaddress.comAlso covers email tools · same kind of online tool
ExtractMailAddress finds and sorts email addresses, URLs, and phone numbers from text and document files.
8
Boomerang
boomeranggmail.comAlso covers email tools · same kind of online tool
Boomerang adds email management and meeting scheduling features to Gmail and Google Workspace.
9
Spike
spikenow.comAlso covers email tools · same kind of online tool
Spike organizes email messages and helps users sort their inbox and compose replies.
10
Also covers email tools · same kind of online tool · free
Use Plain Text explains the difference between plain-text and HTML email and why some people prefer plain text.
11
Also covers email tools · open source
SysTray-X adds a system tray extension to Thunderbird and requires both the add-on and companion app.
12
Shortwave
shortwave.comAlso covers android and email tools
Shortwave uses AI prompts to organize, write, search, and schedule email.
13
Also covers email tools · same kind of online tool
Neural Newsletters helps users create and publish newsletters tailored to audience preferences.
14
Roundcube
roundcube.netAlso covers email tools · same kind of online tool
Roundcube provides free, open-source webmail software that organizations can host and customize.
15
Also covers email tools and linux · open source
Mailspring offers an open-source email client for desktop users on macOS, Windows, and Linux.
16
Also covers email tools and linux · open source
Got Your Back backs up Gmail messages to a local computer through the Gmail API over HTTPS.
17
Also covers email tools and linux · open source
Meru provides desktop access to Gmail on macOS, Windows, and Linux systems.
18
Also covers email tools · free plan
FollowUpThen sends email reminders and follow-ups to help users remember messages and tasks.
19
Also covers email tools · open source
Proton Mail users can access their accounts through this unofficial desktop application.
20
YOPmail
yopmail.comAlso covers email tools
YOPmail provides disposable email addresses and temporary inboxes for reducing spam.
21
Serif
serif.aiAlso covers email tools
Serif automates repetitive email and document workflows and escalates decisions that need human judgment.
22
Nudgemail
nudgemail.comAlso covers email tools
Nudgemail sends email reminders to help users manage follow-ups and inbox tasks.
23
readsom
readsom.comAlso covers email tools
Readsom helps readers discover newsletters by filtering them into topics of interest.
24
UnInbox
github.com/un/inboxAlso covers email tools
UnInbox provides modern email for teams and professionals as an alternative to older email tools.
No alternatives match this filter.
Thunderbird comparisons
Head-to-head breakdowns for the most common switches.
Alternatives to similar tools
ElectronMail24 alternativesFollowupThen24 alternativesGot Your Back24 alternativesShortwave24 alternativesPrivacy Config24 alternativesSpike24 alternatives
TopicEmail Tools · 34 sites Best-of list8 Best Free Email Clients for Personal and Work Mail ListingThunderbird details
What is the best alternative to Thunderbird?
Based on features, tags and platforms, the closest alternatives to Thunderbird are FiloMail, Twobird, and Betterbird.
Is there a free alternative to Thunderbird?
Yes. Useplaintext and FollowupThen are free or offer a free plan.
Are there open-source alternatives to Thunderbird?
Yes: Tray Icon, Mailspring, Got Your Back, and Meru.
Alternatives are suggested from the purpose and features described in our listings. Different pages for the same product appear once. Read each description to check whether it fits your task. How we choose alternatives · Suggest an alternative