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