An Instagram collab post lets two or more accounts co-author a single post that appears on all their feeds and shows both names in the header. For a giveaway, that's a superpower: one post, one comment section, two or more audiences. But co-hosting adds coordination questions, whose rules apply, who picks the winner, how you prove fairness to everyone's followers. This guide covers running a giveaway on a collab post cleanly, and how picking the winner from a shared post link keeps everyone honest.

Key takeaways

A collab post shows one post on every co-author's feed with a shared comment section, so all partners' audiences enter in one place.
Agree on the rules, the prize split, the close time, and who draws the winner before you post. Put it in writing between partners.
Require entrants to follow all co-hosts if that's your goal, but verify follows on the drawn winners only, no tool can check every commenter.
Because the comments live on one shared post, any co-host can paste that post link into a picker and draw from the same pool. A public proof page reassures every partner's audience at once.
A collab post is simpler than a full loop giveaway across separate posts; use a loop only when you have many hosts.

Collab post vs loop giveaway

These get confused, so let's separate them. An Instagram collab post is a native feature: you create one post and invite co-authors, and once they accept, that same post appears on each of their profiles with all names in the header and one shared comment section. A loop giveaway is a chain of separate posts across many accounts, where entrants hop from account to account following each one. A collab post is cleaner and better for two to a few partners because there's a single post and a single comment pool. A loop is for larger chains and is more chaotic; if that's your situation, read the dedicated loop giveaway guide. This guide focuses on the collab-post format.

Step 1: Agree on the terms before you post

Co-hosting fails when partners assume different things. Settle these upfront, ideally in a short written note between you:

The prize and who provides what. Are you splitting the cost, each contributing an item, or is one host funding it?
The entry rules. Follow all hosts? Tag friends? A keyword? Everyone needs to agree so the caption is consistent.
The close date, time, and time zone. One deadline for everyone.
Who draws the winner, and how. Decide that one host runs the draw with a tool that publishes proof, so there's a single, verifiable result all partners can point to.
Eligibility. Which countries, any age limit, and how the prize ships if partners are in different regions.

Step 2: Create the collab post

One host creates the giveaway post (or reel) and, on the tagging screen, invites the others as collaborators. When they accept, the post publishes to all of their feeds with shared authorship and one comment section. Write the caption to reflect the co-hosts: list all handles, state the entry rule, the prize, eligibility, the exact close time and zone, that the winner is drawn at random with public proof, and the standard "not affiliated with Instagram" line. Grab a ready block from the rules template and adapt it for multiple hosts.

Step 3: Handle the "follow all hosts" rule fairly

The usual point of a collab giveaway is that each partner gains followers, so "follow all co-hosts to win" is a fair rule. Just enforce it honestly: no tool can check whether thousands of commenters follow every host, and you wouldn't want it to. Instead, verify follows on the drawn winners only. Pickfetti can check whether a drawn winner follows a required account; if a winner provably doesn't follow a required host, they're skipped and the next person in the shuffle moves up. Private accounts show as unknown and are never rejected for it, because you can't punish someone for something you can't see. Set the winner count plus alternates so a skipped or non-responsive winner doesn't stall the draw.

Step 4: Draw from the one shared post

This is where the collab format shines. Because every co-author shares the same post and the same comment section, the entry pool is unified: there's exactly one place the comments live. Whichever host you agreed would run the draw copies the post's link and pastes it into Pickfetti, which reads the public comments with no Instagram login. Set the agreed rules (comment, minimum tagged friends counted as different accounts, any keyword, one entry per person, exclude the hosts' own accounts, follow verification on winners). Draw winners plus alternates. Every co-host and every partner's audience can then look at the same public proof page at pickfetti.com/d/{code}, with the seed and entrant hash, and confirm the winner was random. One draw, one proof link, trusted by everyone's followers. Run the draw here.

Step 5: Announce together

Have all co-hosts announce the winner, ideally sharing the same proof link and the same winner card, so the result looks unified rather than one host speaking for the group. Warn against impersonators (collab giveaways with bigger combined reach attract more copycats), and if the first winner goes quiet, move to an alternate publicly using the same proof page. See how to announce a winner and, if needed, what to do when a winner isn't responding.

Why the proof page matters more with partners

With a solo giveaway, your own audience mostly trusts you. With a collab, each partner's followers are being asked to trust a result run by someone else's brand. A public, re-verifiable proof page removes that awkwardness entirely: nobody has to take another host's word for it, because the seed and entrant hash let anyone recompute the draw. That's the difference between "their brand picked the winner" and "here's a page all of us, and all of you, can verify." More on the mechanics in what makes a draw provably fair.

FAQ

What's an Instagram collab post giveaway?

A giveaway run on a single co-authored post that appears on every co-host's feed with a shared comment section, so all partners' audiences enter in one place.

How is it different from a loop giveaway?

A collab post is one shared post with one comment pool, ideal for two to a few partners. A loop giveaway is a chain of separate posts across many accounts and is more complex, see the loop guide.

Who should pick the winner in a collab giveaway?

Agree that one host runs the draw with a tool that publishes proof. Because the comments are on one shared post, any host can draw from the same pool, and the proof page reassures every partner's audience.

Can I require entrants to follow all co-hosts?

Yes. Verify it on the drawn winners only, since no tool can check every commenter. Pickfetti skips a drawn winner who provably doesn't follow a required host and moves to the next.

How do we split the prize if hosts are in different countries?

Decide eligibility and shipping upfront, either limit entry to regions you can all ship to, or agree which host ships. Put it in the caption so entrants know before they enter.