What is the difference between 'start up' and 'startup'?

'Start up' (two words) is a phrasal verb meaning to begin operating a system. 'Startup' (one word) is a noun, usually meaning a new company or the process of starting.

Can I say 'start up' for a mobile app?

Yes. You can say 'start up the app' or 'launch the app'. Both are correct. 'Launch' is slightly more common for apps.

Is 'start up' the same as 'boot'?

'Boot' is usually for computers or operating systems turning on from off. 'Start up' is broader — it works for servers, apps, services, and systems.

How do I use 'start up' with a pronoun?

Put the pronoun between the words: 'start it up', not 'start up it'. Example: 'The server is down. Can you start it up?'

What is 'startup time'?

'Startup time' is how long a system or application takes to start up and become ready to use. Example: 'The app has a long startup time.'

Is 'spin up' the same as 'start up'?

'Spin up' is more casual and often used for cloud servers, containers, or virtual machines. 'Start up' is more general and works in more situations.

What Does "Start Up" Mean in Tech?

Commonness
Versatility
Formality	CasualFormalNeutral
Spoken ↔ Written	SpokenWrittenBoth
Directness ↔ Diplomatic	DirectDiplomaticNeutral
Region

Say it like this

✓Let me start up the dev server real quick.

✓The database takes about 30 seconds to start up.

✓Can you start up the staging environment?

✓It won't start up — I'm seeing an error.

✓After the update, you'll need to start up the service again.

Real examples

Standup

"I'm blocked until the CI server starts up — it's been down since this morning."

Slack message

"Hey, can you start up the dev environment? I need to test my changes."

GitHub PR

"Note: After merging, you'll need to start up the background workers manually."

Jira ticket

"Steps to reproduce: Start up the application in debug mode and click 'Submit'."

Retrospective

"We lost time because the staging server took too long to start up after deployments."

Sprint planning

"We need a task to reduce the time it takes for the app to start up."

Pair programming

"Okay, let me start up the local server so we can see the changes."

Don't say this

✕I will startup the server.

✓I will start up the server.— As a phrasal verb, 'start up' is two words. 'Startup' (one word) is a noun meaning a new company.

✕The server is starting up since 10 minutes.

✓The server has been starting up for 10 minutes.— Use 'for' with a duration of time, not 'since'. Use present perfect continuous for ongoing actions.

✕Please start up it.

✓Please start it up.— With pronouns, the object goes between 'start' and 'up', not after.

Other forms

base form

start up

"I need to start up the server."

third person singular

starts up

"The application starts up in 10 seconds."

past tense

started up

"I started up the database an hour ago."

present participle

starting up

"The service is starting up now."

noun form

startup

"The startup time is too long."

Often used with

start up the serverMost common usage — initializing a server

start up the applicationLaunching an app so it runs

start up the environmentGetting a dev/staging environment ready

start up timeHow long it takes to begin running

start up automaticallyThe system begins on its own, no manual action needed

Similar words

bootMore technical; usually for operating systems or hardware

launchOften used for applications or programs

initializeMore formal; emphasizes the setup process

spin upCasual; common for cloud servers or containers

bring upInformal; used for services or systems

Opposites

shut downstopterminatekillspin down

Practice

Try it

4 quick exercises

Choose the most natural sentence

1. Which sounds most natural?

I need to startup the server now.I need to start up the server now.I need to start the server up now.I need to starting up the server now.

Find the error

2. The database is starting up since five minutes ago.

The database isstarting upsince five minutes agoNo error

Complete the sentence

3. The service takes about 30 seconds to ___.

Rewrite more naturally

4. Please startup it again after the update.

More words

boot spin up deploy shut down restart initialize launch

Questions

Quick poll

Have you said "start up" in a standup this week?

Want more structured practice like this? Our English for Programmers course covers real workplace English in depth.

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