How to Run an Instagram Contest and Pick a Fair Random Winner

May 5, 2025 · 6 min read · by InstaCommentPicker

Instagram contests are one of the fastest ways to grow your following, boost post engagement, and reward loyal fans. Done right, a single contest post can reach thousands of new accounts through tags and shares — all without paying for ads.

But there's a step that most creators get wrong: picking the winner. Scrolling through comments and choosing one by hand is slow, biased, and hard to defend if followers question your choice. This guide covers exactly how to run an Instagram contest end-to-end, including using a free Instagram random winner pickerto make the draw transparent and provably fair.

Step 1 — Choose Your Contest Format

The three most common Instagram contest formats, ranked by entry friction:

• Comment to enter — Lowest barrier, highest volume. Ask followers to leave a comment, tag a friend, or use a hashtag.
• Like + follow + comment — Medium barrier. Requires following your account, liking the post, and commenting.
• User-generated content (UGC) — Highest barrier. Participants post their own photo/video with your hashtag. Great for brand campaigns.

For most creators, the comment-to-enter format generates the most entries and is the easiest to manage with an Instagram comment picker.

Step 2 — Write Clear Contest Rules in Your Caption

Vague rules cause disputes. Your caption should clearly state:

• What participants need to do to enter (comment, tag, hashtag, follow)
• How many entries are allowed per person
• What the prize is and its approximate value
• The contest end date and time (include timezone)
• When and how the winner will be announced
• Eligibility (age, country, account type)

Example caption entry rules: “To enter: follow this account, like this post, and comment below tagging one friend. One entry per person. Contest ends May 15 at midnight EST. Winner announced in Stories.”

Step 3 — Promote the Contest

Post your contest to Stories immediately after the feed post goes live — Stories drive the majority of initial entries. Pin the post to the top of your profile. If you have a budget, boost the post to reach new audiences. Cross-post to other platforms linking back to the Instagram post.

Step 4 — Use a Random Comment Picker to Select the Winner

Once your contest closes, do not manually scroll through comments. Use a free Instagram comment picker like InstaCommentPicker:

1. Copy the URL of your Instagram contest post
2. Paste it into InstaCommentPicker and fetch all comments
3. Use the filter panel to apply your rules:
   • Required hashtag (e.g. #yourcontesthashtag)
   • Minimum @mentions (set to 1 if tagging a friend was required)
   • Enable “One entry per user” to deduplicate
   • Skip replies if only top-level comments count
4. The filter counter shows exactly how many valid entries remain
5. Click Pick a Winner

The tool uses crypto.getRandomValues() — a cryptographic-grade random number generator — so the selection is genuinely unbiased. Take a screenshot of the winner card to share as proof.

Step 5 — Announce the Winner Transparently

Share the winner announcement in your Stories, tagging the winner directly. Show the screenshot of the picker result. This transparency is what separates trusted creators from those who face accusations of rigging.

If the winner doesn't respond within 48 hours, use Pick Againto select a backup winner. State this policy in your original rules.

Common Mistakes to Avoid

• Not setting an entry limit — without a “one entry per user” rule, spam enters the pool. Always enable deduplication.
• Ignoring bot accounts — check the winner's profile before announcing. Use the blocklist to exclude known bots.
• Announcing too late — followers lose interest. Announce within 24 hours of the contest closing.
• Manual selection — even with good intentions, people spot patterns and question picks. Use a random picker every time.

Frequently Asked Questions

Can I run a contest on a Reel?

Yes. InstaCommentPicker works on all public Instagram content — posts, carousels, and Reels. Just paste the URL.

What if I need to pick multiple winners?

After picking the first winner, click Pick Again for a second, third, or more. Each pick is independent and draws from the remaining eligible entries.

Is the pick really random?

Yes. We use crypto.getRandomValues(), a cryptographic RNG that is unpredictable and unbiased — the same standard used in security software.