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About Lightning
Lightning is a desktop messenger for Matrix, the open network for secure, decentralised communication.
Sign in to any homeserver, or to several accounts at once, and reach people wherever their account
lives.
Conversations are organised into Spaces, rooms and threads. Send rich text, pictures, files,
voice messages, polls, reactions and custom emoji, and find something you sent months ago without
scrolling back to it.
Private rooms are end-to-end encrypted throughout: verify your other devices by comparing emoji,
restore your keys from backup, and search even your encrypted rooms with an index that never leaves
this computer.
Group voice calls and screen sharing run in the room itself.
License: GPL-3.0-or-later
Sign in to any homeserver, or to several accounts at once, and reach people wherever their account
lives.
Conversations are organised into Spaces, rooms and threads. Send rich text, pictures, files,
voice messages, polls, reactions and custom emoji, and find something you sent months ago without
scrolling back to it.
Private rooms are end-to-end encrypted throughout: verify your other devices by comparing emoji,
restore your keys from backup, and search even your encrypted rooms with an index that never leaves
this computer.
Group voice calls and screen sharing run in the room itself.
License: GPL-3.0-or-later
| Release info | Update on Nov 07, 2026 |
|---|---|
| Release notes | Lightning 0.10.5 A memory and fixes release, and the first with ARM64 Linux packages. Lightning uses less memory again, screen sharing works again on KDE Plasma with the packaged builds, calls reach a call service your own homeserver runs on your local network, calls survive a dropped connection without leaving, screen shares stay sharp on a lossy network, spoiler images and videos arrive blurred, and the message box has an optional Vim mode. Thanks to emmkay440 and f-o-o-g-s for their contributions. Memory and speed • Less memory again. On the same test rig and account as the 0.10.4 notes, a build from partway through this round starts a restored session at about 525 MB of resident memory (0.10.4: about 615 MB), sits at about 685 MB after 50 room switches (about 805 MB), and at about 1150 MB after a long fast scroll (about 1520 MB). Timeline rows now build their reply quote, reactions, read receipts, sender avatar, status line and similar parts only when the message has them, and Settings builds each section when you open it. • Link previews build only the state they show. On the test rig that is about 65-80 MB less memory after scrolling, measured after the figures above. • Audio and voice message cards are much lighter while not playing: about 79 objects each, down from about 285 for an audio file and 364 for a voice message. The speed menu and volume popup are built when you use them. • Idle large rooms let go of their member lists' avatars (display names are kept), and Lightning holds 32 MiB of media in memory instead of 64; the rest is read back from the encrypted media store on disk, not downloaded again. • Name colours no longer poll the server. Lightning asked for the profiles of recently seen people every 20 seconds, about 70 requests a minute while idle. It now asks once per person, again when their membership changes, and refreshes names on screen every five minutes. • A message's menu and dialogs are released when its row leaves the screen. • Fewer… |
| Related tags | Matrix chat messaging |
| Listing data | Flathub |
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