Synapse Alternatives for Linux
There are many alternatives to Synapse for Linux and since it's discontinued a lot of people are looking for a replacement. The most popular Linux alternative is 
Albert, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to Synapse and 14 are available for Linux so hopefully you can find a suitable replacement. Other interesting Linux alternatives to Synapse are 
CerebroApp (Free, Open Source), 
Ulauncher (Free, Open Source), 
Gnome Do (Free, Open Source) and 
dmenu (Free, Open Source).
- Omnilauncher for Linux to help you quickly find and run apps and do other useful things. View 33 alternatives to Albert
- Cerebro is an open source and free electron-based productivity software alternative to Alfred and Spotlight. It is focused on speed and good UI and UX. View 33 alternatives to CerebroApp
Discontinued
Latest release (0.3.2) was on December 2017.
- Free • Open Source
- Mac
- Windows
- Linux
- Fast application launcher for Linux. Custom shortcuts for web URLs and scripts. Extensions supported. View 32 alternatives to Ulauncher
- GNOME Do allows you to quickly search for many items present on your desktop or the web, and perform useful actions on those items.GNOME Do is inspired by... View 71 alternatives to Gnome Do
Discontinued
The program seems to be no longer updated. Last version, 0.95.3, released on November 2014, can be still downloaded from Launchpad.
- Free • Open Source
- Linux
Synapse, Kupfer, and Gnome Do are the three leaders in this category. - dmenu is a dynamic menu for X, originally designed for dwm. It manages large numbers of user-defined menu items efficiently. View 66 alternatives to dmenu
- KRunner is the launcher built into the Plasma desktop. View 63 alternatives to Krunner
- Gnome-Pie is a circular application launcher for Linux. It is made of several pies, each consisting of multiple slices. The user presses a key stroke which opens the desired pie. View 15 alternatives to Gnome-Pie
- Slingscold is a lightweight application launcher similar to Launchpad in Mac OS X. View 5 alternatives to Slingscold
- Application launcher with bash-like completion. View 16 alternatives to Gnome Completion-Run Utility
- Mutate is a simple launcher inspired by Alfred for Ubuntu. View 51 alternatives to Mutate
Discontinued
The last commit to the GitHub repo was on November 5th, 2015.
- Free • Open Source
- Linux