TikTok vs Instagram: Which Is Better for Brands in 2026?
By PostMax Team · Updated · 8 min read
Quick answer
TikTok is better for reaching new people: its For You feed shows videos to strangers, and brands get about 5 times the engagement rate (2.50% vs 0.45% by followers, Socialinsider, Q3 2026). Instagram is better for keeping customers close, with Stories, DMs, carousels and 3 billion monthly users. For most brands the answer is both: make one vertical video and post it to each.
On this page
TikTok and Instagram look alike now that both are full of short vertical video. But they reward different things, and the right choice depends on what your brand or client needs. Here’s how they compare, with the latest numbers we could verify.
TikTok vs Instagram at a glance
| TikTok | ||
|---|---|---|
| Monthly users | 1 billion+ (last official figure, 2021) | 3 billion (Meta, September 2025) |
| Brand engagement rate (by followers) | 2.50% | 0.45% |
| How people find posts | Mostly the For You feed, from accounts they don’t follow | Followers’ feeds and Stories, plus Reels and Explore |
| Formats | Video, photo posts, LIVE | Reels, photo and carousel posts, Stories, LIVE |
| Caption limit | 2,200 characters | 2,200 characters |
| Clickable links in captions | No | No (links work in Stories) |
| Strongest days | Tuesday–Thursday | Tuesday–Thursday |
| Brands post per month (2025 average) | 15 | 20 |
Engagement and posting numbers: Socialinsider 2026 benchmarks (198 million posts from brand accounts with 1,000 to 1 million followers). Best days: our TikTok and Instagram best-time guides.
Users and reach
Instagram is bigger. Meta announced in September 2025 that Instagram had reached 3 billion monthly users, up from 2 billion in 2022. TikTok last shared an official number in 2021, when it passed 1 billion monthly users. It’s grown a lot since, but there’s no recent official figure to compare.
Size isn’t the same as reach, though. On Instagram, a new account’s posts are mostly seen by its followers. On TikTok, a new account’s video can reach thousands of people on day one if it holds attention. That’s why small brands often grow faster on TikTok.
Engagement
TikTok wins clearly for brands. In Socialinsider’s benchmarks of 198 million brand posts, TikTok’s average engagement rate by followers was 2.50% in Q3 2026 (3.70% for all of 2025). Instagram’s was 0.45%, and it has stayed under 0.5% since 2024.
How people find your posts
TikTok: interest first
The For You feed picks videos based on what each person watches, not who they follow. A good video from an account with 50 followers can be shown to far more people than that. The flip side: followers don’t guarantee views, so each video has to earn its audience.
Instagram: followers first, plus Reels
Feed posts and Stories mostly reach people who already follow you, which makes Instagram strong for staying in touch with customers. Reels and Explore add discovery, similar to TikTok, and Instagram’s 2025 redesign put Reels and messages at the front of the app.
Formats and rules
| TikTok | ||
|---|---|---|
| Main format | Vertical video | Reels, plus photos and carousels |
| Longest video via scheduling tools | 10 minutes | 15 minutes |
| Best video size | 9:16, 1080 × 1920 | 9:16 for Reels; 4:5 for feed photos |
| Links | Link in bio | Link in bio; link stickers in Stories |
| Covers | Pick a frame from the video | Custom cover for Reels |
Both allow 2,200 characters per caption, but on both the caption matters less than the first second of the video. Keep captions short, add a few relevant hashtags, and put the link in your bio.
Which to pick, by goal
| Your goal | Better choice | Why |
|---|---|---|
| Reach new people fast | TikTok | The For You feed shows videos to people who don’t follow you. |
| Higher engagement per post | TikTok | About 5× Instagram’s brand engagement rate by followers. |
| Stay close to existing customers | Stories, DMs and followers’ feeds keep you in front of them. | |
| Show products in photos | Photo and carousel posts are a core format. | |
| Local business (café, gym, salon) | Both | Instagram for regulars, TikTok to be found by new locals. |
| Limited time to make content | Both, with one video | Make one vertical video and post it to each. |
Post to both without doubling the work
For most brands the best answer is both. The work doesn’t have to double:
- Film one vertical video (9:16, 1080 × 1920) and keep the original file.
- Upload the original to each app, not a copy saved from TikTok, so there’s no watermark.
- Write one caption, then adjust it: hashtags for each app and “link in bio” in both.
- Add a cover for Instagram Reels so it looks right on your profile grid.
- Post at each app’s best time; both are strongest Tuesday to Thursday.
A cross-posting tool does most of this in one step. In PostMax you upload the video once, write the caption, change it for TikTok or Instagram if needed, add a Reels cover and pick the time. It posts to both, plus YouTube Shorts and anything else you choose. More in our guide on posting to all social media at once.
Frequently asked questions
Is TikTok or Instagram better for business?
It depends on the goal. TikTok is better for reaching new people fast, because its For You feed shows videos to people who don’t follow you, and brand engagement rates are several times higher. Instagram is better for staying close to existing customers, with Stories, DMs, carousels and a bigger audience overall. Most brands do best on both.
Which has more users, TikTok or Instagram?
Instagram. Meta said in September 2025 that Instagram had 3 billion monthly users. TikTok’s last official figure was 1 billion monthly users in 2021; it hasn’t shared a newer official number, though estimates put it well above that.
Does TikTok get more engagement than Instagram?
Yes, for brands. Socialinsider’s benchmarks put TikTok’s average engagement rate by followers at 2.50% in Q3 2026, against 0.45% for Instagram. TikTok’s formula also counts shares and saves, while Instagram’s counts likes and comments, so the gap is partly in how it’s measured.
Can I post the same video on TikTok and Instagram Reels?
Yes. Use the original vertical video file (9:16, 1080 × 1920), not a copy saved from TikTok, because Instagram has said it shows Reels with another app’s watermark to fewer people. Adjust the caption and hashtags for each app.
Should I post more on TikTok or Instagram?
Socialinsider found brands post about 15 times a month on TikTok and 20 times a month on Instagram (2025 averages). Post as often as you can keep the quality up; a schedule you can hold beats a high number you can’t.
Keep reading
- How to Post to All Social Media at Once (Free and Paid Ways)The free ways, the paid way, and what to change for each platform so one post works everywhere.
- How to Manage Multiple Social Media Accounts (Without Losing Track)A 6-step system for running many accounts and clients, with an account list template and access steps for each platform.
- Best Time to Post on TikTok (Every Day of the Week, 2026)Today’s best time in your audience’s time zone, every day of the week, and what four studies agree on.