Why an Invite-Only Survey Actually Needs to Stay Invite-Only
"Invite-only" sounds like a simple promise. You send a survey to specific people, by name, and only those people can respond. No stray link floating around, no anonymous drive-by answers mixed in with the feedback you actually asked for. It's a promise worth taking seriously, and it's why SparkyLoop treats invite-only as a genuinely different distribution mode, not just a label on top of a public link.
What actually happens with invite-only distribution
SparkyLoop's invite-only mode works like this: you send individual, tracked invites by email, and only someone who opens their own invite link can respond. There's no generic public link shown anywhere on an invite-only survey — no shortcut, no fallback URL that would let someone bypass the invite list. Each invitee gets their own link, tied to them specifically, and that's the only way into the survey.
That's a meaningfully different guarantee than a public survey link, where anyone who has the URL can respond and there's no way to know who's actually behind an answer. Invite-only exists precisely for the cases where "who answered" isn't a nice-to-have detail — it's the entire reason the results mean anything.
When to actually use it
Invite-only is the right call when you need to know exactly who answered — a 360-degree review, an employee pulse survey where you're tracking response rates by team, or a customer feedback round where you're planning to follow up individually with people who flagged an issue. It's overkill for something like a general product-satisfaction check, where you'd rather cast a wide net with a public link and not worry about who specifically responds.
The tradeoff is real: invite-only means someone has to build the invite list and send it, and it caps your responses at the number of people you actually reached out to. A public link will always get you more total responses, just with less certainty about who's behind each one.
If you're running something sensitive — performance reviews are the obvious case — invite-only isn't a nice-to-have, it's the whole reason the data is trustworthy. A manager-review survey where anyone could submit an anonymous response would poison the results in a way that's hard to even detect after the fact. That's exactly the scenario invite-only distribution is built to rule out.
How to do this in SparkyLoop
Set distribution while a survey is still a draft: open the survey, and under distribution settings choose "Invite-only" instead of the default public link. If your plan includes gated distribution, this is where you pick it. Once that's set, add invites — enter each person's email, and for a 360-style review (any survey with a matrix/competency question), also set who they're rating and their relationship to that person (self, manager, peer, or direct report). You need at least one invite sent before you can publish an invite-only survey — that's a deliberate guard, so you can't accidentally publish an invite-only survey with nobody actually invited yet.
Once published, each invitee gets their own individual link. Check who's responded and who's still pending from the survey's detail page, and if someone missed their invite or needs a resend, you can always send another. Results show per-question breakdowns as responses come in, and if the survey isn't anonymous, you can see exactly who answered what — which is the entire reason to choose invite-only distribution over a public link in the first place.
See the full feature set, including gated and invited distribution, at SparkyLoop's features page.