Instagram Reels vs TikTok: Which Platform Should Australian Businesses Focus On?

The question most brands get wrong

The wrong way to think about this: "Which platform should we be on?"

The right way: "Where is our specific audience, and what does that platform reward?"

Both Instagram Reels and TikTok support short-form vertical video. Both have large Australian audiences. But they function differently, reward different content, and reach different demographics.

Australian audience breakdown

Instagram (broadly)

•11+ million Australian users

•Skews 25-45 demographically

•High brand/commerce intent

•Existing network effects (people follow brands they already know)

TikTok

•8+ million Australian users

•Still younger-skewed but rapidly aging up

•High discovery potential (shown to non-followers)

•Entertainment and authenticity-first culture

The key algorithm difference

Instagram Reels primarily shows content to your existing followers and their networks. Growing beyond your existing audience requires consistent high engagement or deliberate collaboration and hashtag strategy.

TikTok shows content to anyone the algorithm thinks will engage. A brand new account can reach hundreds of thousands of people if the content hooks well.

This means: TikTok has higher ceiling for discovery, Instagram has stronger floor (your followers are always a starting audience).

Content style differences

Instagram Reels audiences expect:

•More polished production (not necessarily expensive, but intentional)

•Aesthetic consistency with your overall Instagram brand

•Content that fits your existing follower interests

•Trending audio used in a way that fits your brand

TikTok audiences expect (and reward):

•Raw authenticity — over-produced content performs worse

•Personal, direct-to-camera communication

•Trends adopted quickly (within 48-72 hours of trend peak)

•Entertainment first, brand second

The same video often needs different treatment for each platform, not just a crop.

Where different businesses should focus

Prioritise Instagram Reels if:

•Your audience is 30-50 year olds

•You're a B2B business or professional service

•You already have a significant Instagram following

•You sell aspirational lifestyle, fashion, or design products

Prioritise TikTok if:

•You're targeting 18-35 year olds

•You're launching a new brand with no existing audience

•You have genuine "process" or "day in the life" content potential

•Your products are visually interesting or tell a good story

Do both if:

•You're a consumer brand with a younger target audience

•You have the capacity to adapt content for each platform

•You want maximum reach across demographics

The cross-posting reality

Many brands cross-post the same video to both platforms. This works, but the results are usually mediocre on both because the content isn't optimised for either.

Better: Create content with a primary platform in mind, then adapt the caption and minor details for the secondary platform. Not perfect, but a middle ground that doesn't require double the content production.

Zestly makes this straightforward — you can schedule the same video to both platforms and edit the caption and hashtags for each independently.

The verdict

For most Australian businesses: start with Instagram Reels because you likely already have an Instagram audience, and layer in TikTok as you build your short-form video production capabilities.

Don't skip TikTok entirely — the discovery potential is too significant for growing brands. But Instagram Reels is the lower-risk place to develop your short-form video skills.