Slido pricing: what every plan costs, the participant caps, and what extra members really add

Slido costs $0 on Basic, $17.50 a month on Engage billed $210 annually, $75 a month on Professional billed $900, and $200 a month on Enterprise billed $2,400. All prices exclude tax. The number that decides which tier you land on is almost never the feature list. It is the participant cap: 100 on Basic, 200 on Engage, 1,000 on Professional and 5,000 on Enterprise.

That makes Slido the mirror image of how most engagement tools price. Mentimeter charges for the people who present and lets an unlimited audience join. Slido charges for the size of the audience and bundles a small number of members with each tier. Neither approach is better in the abstract, but one of them will be considerably cheaper for your specific shape, and it is worth doing the arithmetic before the renewal rather than after. Every figure below was read from slido.com/pricing in US dollars on August 26, 2026.

How much does Slido cost?

Basic is free forever, Engage is $17.50 per month billed at $210 a year, Professional is $75 per month billed at $900 a year, and Enterprise is $200 per month billed at $2,400 a year. Every paid plan is billed annually and quoted excluding VAT, and paid plans carry a 30 day money back guarantee.

Two columns in that table do more work than the price column. The member ceiling is a hard limit people discover late: Engage tops out at five members no matter what you are willing to pay, so a growing team hits a wall that only Professional opens. And the participant cap counts joined devices across the whole meeting rather than concurrent viewers, which is a meaningfully stricter definition than most buyers assume.

Is Slido free?

Yes, and the free plan is genuinely useful for small recurring meetings. Basic gives you up to 100 participants in any single slido, basic audience Q&A, 3 polls and 1 quiz per slido, with no limit on how many meetings you run and no time limit.

The per meeting counting is what makes it competitive. You can run a 90 person all hands every single week on the free plan forever, which no other major tool in this category allows. Mentimeter's free tier caps you at 50 participants pooled across the whole month, so the same weekly meeting exhausts it in the first session. If your pattern is frequent and moderate in size, Slido free is the most generous option available.

What Basic withholds is depth rather than scale. Three polls per slido is enough for a pulse check and not enough for a structured session. There are no surveys, no data exports, no moderation, and only one member, so nobody can co-host with you. The moment you need to hand someone the results afterwards, or stop an inappropriate question reaching the screen at a town hall, you are on Engage or Professional.

What is the difference between Slido Engage and Professional?

Engage buys unlimited polls for one person and a 200 participant room. Professional buys moderation, branding and a 1,000 participant room. The $690 a year gap is mostly about running events for people outside your team rather than meetings inside it.

Engage at $210 a year is the individual tier. It removes the poll and quiz limits, adds surveys so you can group questions instead of asking one at a time, and adds analytics and data exports so the session produces something you can send on. One member is included and you can add up to four more. For a manager running team meetings or a trainer with groups under 200, Engage is very often the correct and final answer.

Professional at $900 a year is the events tier, and three of its features are the reason people move up. Moderation lets you screen questions before they appear, which is not optional at a public webinar or a company town hall. Branding puts your logo and colors on the participant view. Advanced privacy options and organization analytics matter to anyone who has to answer for how the tool is used across a company. The 1,000 participant cap and two included members come along with it.

How many participants can join a Slido?

One hundred on Basic, 200 on Engage, 1,000 on Professional and 5,000 on Enterprise. Slido counts the total number of joined participants, meaning devices, across the whole meeting rather than the peak number connected at once.

That definition is stricter than it sounds and it catches people out at long events. A three hour conference session where 400 people drift in and out has not had a peak of 400, but it has had 400 joined devices, and that is the number Slido measures against your cap. Anyone who joins on a laptop and again on a phone counts twice. If you are close to a tier boundary at a real event, plan for the higher number.

Above 5,000 there is no self serve option and Slido asks you to contact sales for a custom arrangement. This is the point where the pricing model starts to work against you, because a genuinely large audience is exactly the situation where a per presenter tool costs the same as it did at fifty people.

How much do extra Slido members cost?

Additional members cost $17.50 per month on Engage, $37.50 on Professional and $50 on Enterprise. Read that sequence twice, because it runs the opposite way to almost every other SaaS product: the more you spend, the more each additional person costs.

Most software gets cheaper per seat as you scale, through volume discounts or bundled tiers. Slido's extra members get nearly three times more expensive from Engage to Enterprise. The logic is presumably that an Enterprise member is worth more, and the effect on a budget is real. Four extra people on Professional is $1,800 a year on top of the $900 base, which more than doubles the invoice and is not visible anywhere on the plan cards.

So the honest way to price Slido is to add up base plus extra members before comparing anything. A team of four facilitators on Professional is $900 plus two additional members at $37.50 a month, which is $900 plus $900, so $1,800 a year. The same four facilitators on Mentimeter Pro pay four seats at $28 a month, which is $1,344 a year, with no participant cap at all. We put both side by side with the arithmetic on Mentimeter pricing.

Slido vs Mentimeter: which is cheaper?

Slido is cheaper when your audiences are small and frequent. Mentimeter is cheaper when your audiences are large. The crossover sits at roughly 200 participants, because that is where Slido forces a jump from $210 a year to $900 and Mentimeter does not move at all.

That last row looks like a mistake and is not. Mentimeter genuinely does not charge for audience size, so one $14 seat covers a 3,000 person all hands. If large audiences are your normal case, that difference is decisive and no feature comparison will outweigh it.

Slido earns its money elsewhere, and it is worth saying clearly. Its Q&A is the best in the category, with crowdsourced upvoting, replies, labels and proper moderation, and Q&A is the feature most town halls actually run on. Cisco owns Slido, so the Webex integration is native and the Microsoft Teams one is well maintained. Participant SSO and HIPAA with a BAA on Enterprise clear procurement hurdles that stop other tools. If your requirement is a governed, moderated Q&A for a regulated company, Slido is the stronger product and the price is not the point.

Does Slido work inside PowerPoint, Teams and Zoom?

Yes. Slido publishes integrations for PowerPoint, Google Slides, Zoom and Microsoft Teams, and the add-in approach means the polls run inside the deck rather than in a browser tab you have to alt-tab to during a live session.

This matters more than it sounds for anyone presenting under pressure. Switching windows in front of an audience is where live polling usually goes wrong, and embedding the poll as a slide removes the failure mode entirely. It also means the interactive moments sit in the same file as the rest of your narrative, which is a practical advantage if you are the person who had to turn a quarterly report into a presentation in the first place.

The one thing to check before committing is which plans carry which integration on your contract, since Slido lists integrations as a feature family in its comparison grid rather than a flat inclusion. If a specific integration is the reason you are buying, confirm it against the tier you are about to sign for.

Is Slido worth it for workshops and brainstorming?

For structured audience input, yes. For generating the ideas the audience is meant to react to, no, and that is not a criticism of Slido so much as a description of what live polling is.

In a workshop, Slido does two jobs well. It surfaces what a group actually thinks rather than what the most confident person in the room says, which is genuinely valuable at the opening of a session. And it converges honestly at the end, because a ranked poll everyone can see is harder to argue with than a facilitator summarizing the mood. Open text questions with moderation give quieter people a route in.

What it cannot do is produce options. If a group arrives with four ideas between them, a poll ranks four ideas, and the session ends having carefully chosen the best of a thin set. That failure is common enough to be predictable, and the reasons behind it are worked through in why group brainstorming fails. The practical fix is upstream: arrive with a wide, scored set of options and use the live vote to choose between them rather than to invent them. For designing the agenda around all of this, SessionLab pricing covers the session design category, facilitation tools maps how the different kinds of workshop software fit together, and brainstorming software cost has current numbers for the whole field.

The short answer

Pick Basic if your meetings are under 100 people and you only need a pulse check. Pick Engage at $210 a year if you are one person who needs unlimited polls, surveys and exports for groups under 200. Pick Professional at $900 if you run events for audiences up to 1,000 and need moderation and branding. Pick Enterprise at $2,400 if you need SSO, SCIM or a BAA.

Before you sign, do two sums. Add the cost of every extra member at the tier's own rate, because that number is not on the plan card and it goes up rather than down as you climb. Then price the same job on a per presenter tool and see which side of the crossover you are on. If your audiences are consistently large, you are probably overpaying for a cap you did not need to buy.