K
Kestrel
vs
P
Phusion Passenger

Kestrel vs Phusion Passenger

Phusion Passenger is used by 280companies — 1.4x more than Kestrel (200).

200 use Kestrel280 use Phusion Passenger1,531 emails available

Side-by-side comparison

KestrelPhusion Passenger
Companies200280
CategoryWeb serversWeb servers
Emails available729802

Company adoption

Kestrel200Phusion Passen…280

Top industries

Kestrel

E-commerce & Retail29
Media & Content24
Other15
Healthcare & Life Sciences9
Hospitality & Travel8

Phusion Passenger

E-commerce & Retail46
Other33
Media & Content32
Hospitality & Travel19
Education & Learning18

Top companies using Kestrel

Your Azure Function App is up and running.a.ezyvvn.comLekis s.r.o.erecept.lekis.czISOTRA SWISS GmbHen.isotraswiss.chconfiguratore ISOTRAconfiguratore.isotra.itISOTRA Konfiguratorkonfigurator.isotra.ch

Top companies using Phusion Passenger

RubyConf Taiwan 20152015.rubyconf.twLibrarylibrary.ualberta.caCNOSFcnosf.franceolympique.comRecueil de signalementssignalements-opcomobilites.vispato.comKitten Rescuekittenrescue.networkforgood.com

Get the full comparison

480 companies with emails, tech stacks, and contacts

Start free →

1,000 lookups · API access · CSV exports

API access

GET /api/v1/tech?name=kestrel

AgentData picks

DragApp

AI-powered shared inbox, help desk, and team collaboration — inside Gmail. 200K+ users.

Try DragApp free →

HeyHelp

AI email assistant inside Gmail. Drafts, sorts, follows up.

Try HeyHelp free →

Oneway

All-in-one customer platform — live chat, email, automations, changelogs & roadmaps with AI.

Try Oneway →

Related comparisons

HSTS vs KestrelCompare →HSTS vs Phusion PassengerCompare →Google Analytics vs KestrelCompare →Google Analytics vs Phusion PassengerCompare →jQuery vs KestrelCompare →jQuery vs Phusion PassengerCompare →

View individually

K
Kestrel
Companies using Kestrel→
P
Phusion Passenger
Companies using Phusion Passenger→

Frequently asked questions

Need this data via API?

Access technology comparison data programmatically via REST API or MCP.

API docs →