mpump
mpump is a free browser drum machine, groovebox and step sequencer for making beats and sharing them as links.
What mpump is
mpump is a free browser drum machine, groovebox and step sequencer for making beats and sharing them as links. Someone opening a link can change the groove and send a revised version. The browser tool includes drums, bass, synth, a mixer and effects with real-time synthesis, along with patterns, arpeggiators and Euclidean rhythms. It supports MIDI clock synchronization and an Ableton Link bridge for use with Ableton Live, Logic Pro, Bitwig, Traktor, djay and other Link-enabled apps. Recordings can be saved as WAV, and sessions can be exported or imported as JSON. The PWA works offline after its first load. Live Jam allows up to 4 peers and Live Set up to 49 listeners, but both are opt-in and currently require users to provide their own relay because the public hosted relay is offline. The maker says mpump has no accounts or personal tracking and music stays on the user's device. It is available on Android, iOS and the web, with source code published under AGPL-3.0.
Good
- Shared beat links let recipients edit and resend grooves.
- Includes drums, bass, synth, mixer and effects.
- Supports MIDI clock and an Ableton Link bridge.
- Can record WAV and exchange JSON sessions.
- PWA works offline after its first load.
Watch out
- Public hosted relay is currently offline.
- Live collaboration requires users to provide their own relay.
- Live Jam supports up to 4 peers.
- Live Set supports up to 49 listeners.
Who it suits
mpump suits people who want to create sequenced beats in a browser and share editable grooves by link. It may also suit musicians using MIDI clock or Ableton Link, provided they can supply a relay for live collaboration.
Verdict
mpump brings sequencing, synthesis and editable beat sharing together in a browser-based groovebox. Offline use is available after the first load, but live collaboration currently depends on setting up your own relay.
Plans and prices
From mpump's own pricing page, checked 15 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Free | Free | browser groovebox · drums, bass, synth and effects · shareable beat links |
The facts
Each one read from mpump's own pages, with the date it was checked.
What it does
- Ableton Link integration
- A separate Link Bridge synchronizes tempo and transport with Ableton Link applications such as Ableton Live, Logic Pro, Bitwig, Traktor and djay.checked 15 Oct 2026
- Arpeggiator and rhythms
- Sequencing tools include an arpeggiator, Euclidean rhythm generation, swing, scale locking and tap tempo.checked 15 Oct 2026
- Changelog
- The changelog records a 2026 v1.12.0 review-fix release addressing MIDI clock, worklet allocation, song transitions, jam reconnects and worker caching.checked 15 Oct 2026
- Contact
- The maker lists [email protected] as its contact email.checked 29 Sep 2026
- Documentation
- The repository includes separate technical documents covering architecture, sound design and a user guide.checked 15 Oct 2026
- Effects
- The effects chain contains ten reorderable real-time processors, including delay, distortion, reverb, compressor, chorus, phaser, flanger and tremolo.checked 15 Oct 2026
- Independent community post
- A Reddit announcement describes mpump as free, open source, account-free and subscription-free, intended for sharing loops across phones and computers.checked 15 Oct 2026
- Independent creator support
- The creator's Ko-fi page identifies gdamdam as the maker of mpump and invites voluntary financial support.checked 15 Oct 2026
- Independent package compatibility
- Its documentation says Safari and iOS lack support for the Web MIDI workflow, while Chrome, Edge and Opera are supported.checked 15 Oct 2026
- Independent package documentation
- The PyPI page describes a related Python package with browser, terminal and headless MIDI sequencer interfaces.checked 15 Oct 2026
- Independent package hardware
- The PyPI documentation lists automatic recognition for 50 USB MIDI devices and marks only some devices as tested.checked 15 Oct 2026
- Independent package requirements
- The PyPI package requires Python 3.11 or newer and macOS CoreMIDI for its hardware-control features.checked 15 Oct 2026
- Instruments
- The application provides synthesized drums, bass, a polyphonic synthesizer, mixer and effects.checked 15 Oct 2026
- Integrations
- The project documents MIDI clock synchronization and an Ableton Link bridge that works with Ableton Live, Logic Pro, Bitwig, Traktor, djay, and other Link-enabled apps.checked 29 Sep 2026
- Licence
- The repository is released under the GNU Affero General Public License version 3.0.checked 15 Oct 2026
- Limit: hosted collaboration
- The README states that the public hosted jam relay is offline, so users must provide a relay to use live modes.checked 15 Oct 2026
- Link Bridge limitation
- The bridge requires its graphical Tauri window and does not yet offer a headless command-line mode.checked 15 Oct 2026
- Live collaboration
- Live Jam supports up to 4 peers and Live Set supports up to 49 listeners; both are opt-in, and the public hosted relay is currently offline, so users need their own relay.checked 29 Sep 2026
- Live Jam
- Opt-in Live Jam allows up to four peers to control a session through a WebSocket relay.checked 15 Oct 2026
- Live Set
- Opt-in Live Set supports one controller performing for as many as 49 listeners.checked 15 Oct 2026
- Local data
- Sessions, patterns, settings and audio synthesis remain in the browser on the user's device.checked 15 Oct 2026
- MIDI
- mpump accepts MIDI clock input with transport controls and tempo display, and it can connect to MIDI devices.checked 15 Oct 2026
Where it runs
- Link Bridge platforms
- The bridge can be packaged for macOS DMG, Windows MSI or EXE, and Linux DEB or AppImage.checked 15 Oct 2026
The company
- Maker profile
- The GitHub profile identifies the maintainer as gdamdam, lists San Francisco, and shows interests in music, radio and peer-to-peer systems.checked 15 Oct 2026
The full review of mpump
mpump is a browser groovebox and step sequencer for making beats and passing editable grooves around by link. It suits beat-makers who want a free, account-free place to sketch or share ideas; its strongest case is that an exchanged beat remains editable, not just listenable.
Overview
A shared beat link lets another person open the groove, change it, and send a new version. That is a useful format for asynchronous idea-swapping, though it is not the same as seamless live collaboration. The maker says mpump has no accounts or personal tracking and that music stays on the user's device; its source code is published under the AGPL-3.0 license.
Key features
The browser groovebox brings drums, bass, synth, a mixer, and effects together with real-time synthesis. Patterns, arpeggiators, and Euclidean rhythms offer several approaches to sequencing, while hybrid sequencing, MIDI support, sample import, and live-performance tools give it scope beyond a simple drum pattern editor.
WAV recording provides an audio output, while JSON session export and import let users preserve and reopen editable session data. The PWA supports offline use after its first load, so it can keep working without a connection once initially opened.
MIDI clock synchronization and an Ableton Link bridge connect mpump with Ableton Live, Logic Pro, Bitwig, Traktor, djay, and other Link-enabled apps. Live Jam allows up to 4 peers and Live Set up to 49 listeners, but both are opt-in and the public hosted relay is currently offline. Users therefore need to set up their own relay to use those live features, a substantial hurdle for anyone expecting collaboration to work out of the box.
Pricing
The Free plan costs nothing, billed Free. It includes the browser groovebox, drums, bass, synth, effects, and shareable beat links. There are no paid mpump plans to weigh against it in the stated offering, making it a low-commitment option for sketching and sharing; the trade-off is that live collaboration requires users to provide a relay.
Platforms
mpump is offered on the web, with Android and iOS also listed as platforms. Its PWA supports offline use after the first load. The browser-based approach suits people who want a groovebox without committing to a desktop-only setup.
Who it's for
Choose mpump if you want to build patterns in a browser, share work that others can edit, or connect its timing to Link-enabled music apps. It is less suited to groups seeking immediate hosted live jamming: setting up a relay is a prerequisite, even though the collaboration modes support multiple peers or listeners.
Pros and cons
- Pro: Editable beat links make it possible to exchange and develop grooves rather than only share finished audio.
- Pro: A free plan combines drums, bass, synth, effects, sequencing tools, WAV recording, and session import and export.
- Pro: Offline PWA support after the first load and documented MIDI clock and Ableton Link integration suit work across changing connection conditions and compatible music apps.
- Con: Live Jam and Live Set depend on a user-supplied relay because the public hosted relay is offline.
Alternatives
Drum Machine Software is the broader category directory for comparing options.
- Zenbeats is worth considering if you want a freemium music-production app across Android, iOS, macOS, and Windows rather than a browser groovebox.
- Hydrogen is a free alternative for Linux, macOS, and Windows if you prefer a desktop drum machine.
- Playbeat 4 is a paid alternative with a free trial for iOS, macOS, and Windows; its full plan is €89, paid once.
- Atlas 2 is a paid, trial-available option for Linux, macOS, and Windows at $99, paid once, with installation on 3 machines and 64-bit-only support.
- Beatmaker 3 offers a paid, trial-available route on iOS, macOS, and Windows, with individual genre-focused instruments or a 17-instrument bundle.
- DrumComputer is a paid alternative with a free trial for iOS, macOS, and Windows.
- Redrum is a paid, trial-available alternative for macOS and Windows.
- Punch 2 is a paid, trial-available alternative for macOS and Windows.
Verdict
mpump is a strong fit for beat-makers who want a free browser groovebox with editable sharing, offline access after the first load, and useful sequencing and integration options. Choose it for collaborative idea exchange and flexible sketching; look elsewhere if your priority is hosted live collaboration without setting up a relay.
Getting started
- Open https://mpump.live/ in a browser.
- Use the free browser groovebox to make a beat.
- Open the service on Android or iOS if you prefer a mobile platform.
- Share a beat link to let someone open and edit the groove.
- For Live Jam or Live Set, provide your own relay.
Questions
How much does mpump cost?
The Free plan costs nothing.
Which platforms does mpump support?
It supports Android, iOS, and web.
Can I share and collaborate on beats?
Beat links can be opened, changed, and shared as new versions. Live Jam supports up to 4 peers and Live Set up to 49 listeners, but both require your own relay while the public hosted relay is offline.
Does mpump work offline?
Its PWA supports offline use after its first load.
What integrations and exports does it support?
It documents MIDI clock synchronization and an Ableton Link bridge for Ableton Live, Logic Pro, Bitwig, Traktor, djay, and other Link-enabled apps. It supports WAV recording and JSON session export and import.
Is mpump open source?
Its source code is published under the AGPL-3.0 license.
Alternatives to mpump
- 1
Groove Agent 6
APImacOSWindows6.9$59.99 one-time - 2
DMC60
macOSWindows6.8From $9.99 a month - 3
Beatmaker 3
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Playbeat 4
iOSmacOSWindows6.5€89 one-time - 5
Atlas 2
LinuxmacOSWindows6.3$99 one-time - 6
DrumComputer
iOSmacOSWindows6.3$129 one-time