Beautiful email. For everyone.

A fast, keyboard-first desktop mail client for the accounts you already own.
JMAP and IMAP, Linux, Windows and macOS. No hosted service, no subscription, no telemetry.

Download · Features · Connect an account · Build from source

Why Inlark?

If you run your own mail server, or just have a few accounts at small providers, your choices are usually an email client that looks like it was designed for Windows XP, one that wants a monthly fee, or one that routes your mail through someone else's cloud. Inlark is the fourth option: a calm, modern client that talks straight to your server and then gets out of the way.

• One inbox for every account. Personal, work and the side project you swear you'll finish all land in one timeline, each marked with its account. Replies go out from the address the message was sent to, so you stop accidentally emailing your landlord from your work address.
• Your keyboard, first. J/K to move, E to archive, R to reply, / to search, and Ctrl K for everything else. Every action works with a mouse, too.
• Undo for everything. Archive, trash, move, star or mark as spam, then press Z. It works even if another client changed the mailbox in between.
• Search that goes all the way back. Searches run on your server across every folder and every year, narrowed by sender, recipient, subject, date or attachment.
• Big mailboxes stay fast. A quarter of a million conversations in the unified inbox still scroll smoothly, because only the few dozen on screen are ever drawn.
• Sending you can trust. Drafts survive crashes. If a send's response gets lost on the way back, Inlark marks the message unconfirmed and doesn't retry it on its own, so nobody gets your message twice.
• Private by design. Inlark connects directly to your mail server. There's no Inlark account, no sync service and no analytics.
• Dark and light, with equal care. Both themes get the same attention to detail, and rich HTML mail keeps the look its sender designed.
• At home on your desktop. Native notifications, a tray icon with your unread count, and Inlark can be your default mailto: handler.

A focused reader, without the clutter	Ctrl K: every action, folder and account in a few keystrokes

[!NOTE]

Inlark is an early preview. The everyday essentials work, but it's young. Keep your server's webmail bookmarked for now, just in case.

Install

Grab the latest build from the releases page:

Packaged builds check for updates in the background. When an update downloads successfully, Inlark installs it after you quit, so it never interrupts your work. If the automatic update fails, Inlark links to the download page for a manual install.

| Platform | Download | | -------- | ---------------------------------------------------------- | | Windows | Installer (x64) | | macOS | DMG or ZIP, for both Apple Silicon and Intel | | Linux | AppImage, .deb or .rpm (x64), or Nix |

Nix and NixOS

Install from the flake:

nix profile install 'github:inlark/inlark#inlark'

Or enable the NixOS module in your flake configuration:

{
  inputs.inlark.url = "github:inlark/inlark";
outputs = { nixpkgs, inlark, ... }: {
    nixosConfigurations.my-host = nixpkgs.lib.nixosSystem {
      system = "x86_64-linux";
      modules = [
        inlark.nixosModules.default
        { programs.inlark.enable = true; }
      ];
    };
  };
}

The package includes the desktop entry, icon and mailto: handler, for x86_64 and aarch64 Linux. These examples follow the latest code on the default branch.

To update a profile installation, run nix profile upgrade inlark. For NixOS, run nix flake update inlark from your system configuration directory, then sudo nixos-rebuild switch --flake .#my-host (replace my-host with your host name). Nix keeps the installed revision until you update it; removing the release tag does not enable automatic updates.

Connect an account

Open Settings → Accounts → Add account and type your email address. Inlark looks up what your domain publishes and shows you the protocol, servers, ports and security it found before it asks for a password. Set up manually is always there if you prefer.

• JMAP is preferred when your server offers it. Inlark finds it through DNS SRV or /.well-known/jmap.
• IMAP/SMTP settings come from your domain's autoconfig file or DNS SRV records. Only if your domain publishes nothing does Inlark ask Thunderbird's public settings directory, and then it sends just the domain.
• Encryption is required. Inlark uses implicit TLS or required STARTTLS, always with certificate verification and never a plaintext fallback. Your password is never tried against a server you didn't choose.
• Passwords go into your OS keyring when one is available. Without a keyring, you decide whether to remember a login on this device. If you do, the password is stored unencrypted in an owner-only file.

Gmail and Microsoft sign-in (OAuth) aren't supported yet.

Build from source

You'll need Node 24 and pnpm 12.3.4.

pnpm install --frozen-lockfile
pnpm dev          # the desktop app
pnpm dev:web      # browser preview with sample mail, no real accounts

Add ?stress=1 to the browser preview's URL for five synthetic 50,000-message inboxes, or run pnpm dev -- --demo for a sample workspace in the desktop app. On NixOS, run nix develop path:. first. The shell provides a compatible Electron.

pnpm check             # formatting, types, tests and a production build
pnpm test:stalwart     # real JMAP, IMAP and SMTP against a disposable Stalwart server (Podman or CONTAINER_RUNTIME=docker)
nix build path:.       # Nix package in ./result/bin/inlark
pnpm package:linux     # AppImage, .deb and .rpm in apps/desktop/release
pnpm test:deb          # Debian packaging smoke test (Podman)

INLARK_DATA_DIR="$(mktemp -d)" ./result/bin/inlark --smoke-test --ozone-platform=wayland

What's not here (yet)

Inlark tries to make everyday email excellent before adding more features. AI, snooze, scheduled sending, rules, calendars, a full address book and mobile apps are all deliberately out of scope for now. If you need your email client to also be your calendar, your CRM and your life coach, this isn't that client. Yet.

Credits

Inlark stands on the shoulders of two products that showed how good software can feel:

• Linear, for its restraint, clear hierarchy and obsessive attention to detail, the bar for Inlark's visual design.
• Superhuman, for proving email can be fast, focused and driven from the keyboard, the bar for Inlark's workflows.

License

Copyright © 2026 Paul Koeck. Inlark is free software under the GNU Affero General Public License v3 (AGPL-3.0-only). The bundled Inter font is under the SIL Open Font License; the outlined Hanken Grotesk wordmark is also under the SIL Open Font License.