runit
systemd
sysvinit
Dinit
Launchd
Upstart
Healthchecks.io
s6 is a small suite of programs for UNIX, designed for process supervision. It can be used as an init system, or as separate supervision components.

Low End Box
VPS and cloud server prices, compared at the same size

Which is more popular?
Based on our record, s6 seems to be more popular. It has been mentioned 13 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | skarnet.org | stackrates.ai |
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In their own words, as submitted to SaaSHub.

No description of s6 yet.
StackRates is a price index for VPS and cloud servers. It reads list prices from 46 providers, from their own pages and price APIs, compares plans at the same memory, and shows the date and source of every number. Free, no account. How it differs from what you may use now: - Low End Box publishes...
What each product offers, as listed by its team.

Possible disadvantages
No features have been listed yet.
Walkthroughs and reviews on video.
Samsung Galaxy S6 Review!
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How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using s6 and StackRates. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.

Drop cloudflared in favor of WireGuard (kernel module, negligible userspace cost) and you're comfortably under 27MB. Replace systemd with something like s6 or plain old SysVinit and you shave off another 2-3MB. - Source: dev.to / 7 months ago
Not so much about timeouts, but related in that it is based around managing children processes: The lineage of tools descending from daemontools for service management is worth exploring: daemontools: http://cr.yp.to/daemontools.html... - Source: Hacker News / about 2 years ago
This page and this page, both by Laurent Bercot, creator of s6. Source: over 3 years ago
Tracking StackRates since Oct 2026.
When comparing s6 and StackRates, you can also consider the following products.
runit is a cross-platform Unix init scheme with service supervision, a replacement for sysvinit...
Compare runit to s6 or StackRates:

systemd is a replacement for the init daemon for Linux (either System V or BSD-style).
Compare systemd to s6 or StackRates:
Savannah is a central point for development, distribution and maintenance of free software, both GNU and non-GNU.
Compare sysvinit to s6 or StackRates:

Dinit is a service supervisor with dependency support which can also act as the system "init" program.
Compare Dinit to s6 or StackRates:
a free system array created by Apple inc. For BSD - including macOS as macOS is based on the Darwin kernel of BSD
Compare Launchd to s6 or StackRates: