Slido vs Mentimeter vs AskModerator: Which Q&A Tool Fits Your Event?

Short answer: Choose Slido for meeting suite integration and interactive features, Mentimeter for presentation led events, and AskModerator for a one-off event where a solo host wants duplicate questions grouped automatically and pays per room instead of a subscription.

All three tools sit in the same category: the audience joins from a phone, questions or responses appear on a shared screen and the host moderates from a dashboard. The differences that matter are in the pricing shape, how each handles the duplicate question problem and how much setup a one-off event needs. This comparison is written for the host choosing a tool for a specific event, not for an enterprise buyer running a rolling licence review.

Pricing Shape

Slido and Mentimeter both sell subscriptions aimed at recurring use, with event licences available at a premium for one-offs. AskModerator sells one time credit bundles with no subscription: a small session costs 5 credits, a standard one 10, and credits never expire, so an occasional host buys once and tops up when the next event appears. The trade is explicit: the subscription tools buy integration depth and brand features; the credit model buys the absence of a recurring bill for hosts who run a handful of events a year.

The Duplicate Question Problem

Every large Q&A produces repeats, and the tools diverge here. Slido surfaces similar questions as you type and lets hosts merge them by hand during the session. Mentimeter treats questions mostly as an open wall, so merging is manual throughout. AskModerator runs an AI pass on the incoming stream that groups related questions into one topic with a combined vote total while the session is live, which is the mechanic explained in AI question grouping . For a 500 person town hall the difference is practical, not cosmetic: hand merging during a live session is a job, automatic grouping is not.

Anonymity and Control

All three allow anonymous participation from the audience's point of view. The controls differ on the host side. Slido and Mentimeter expose moderation queues, user moderation settings and moderation approval modes that scale from classrooms to moderated enterprise town halls. AskModerator keeps the control surface deliberately small: hide, mark answered, lock the room, a four digit PIN for co-hosts and per-IP throttling behind the scenes, which covers the spam mechanics discussed in anonymous Q&A research . A host who needs polls, quizzes and word clouds alongside Q&A is better served by the bigger platforms; a host who needs questions collected, ranked and answered does not.

Where Each Tool Fits

Choose Slido when your organisation already runs meetings inside PowerPoint or Teams and wants the integration. Choose Mentimeter when the event is presentation led and interactive slides matter more than question management. Choose AskModerator when the event is a one-off, the host works alone and the duplicate question problem is the part of Q&A they dread; the moderated Q&A explainer describes the flow it implements. The honest framing: this is a category with room for both a subscription platform and a pay per event tool, and the right answer depends on how often you host, not on a feature checklist.

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