Slido

Slido is one of the cleanest ways to add moderated Q&A, polls, quizzes, and audience voting to conference sessions, webinars, and hybrid events without forcing attendees into another app. It shines as an engagement layer, not as a full event platform, and the jump from Basic to the more useful paid tiers is not as transparent as it should be.

Free Basic; paid annual plans start at €15/month; enterprise by quote
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Tool Nutrition Label
Founded 2012
Headquarters Bratislava, Slovakia
Company Size 260+ teammates
Funding Acquired by Cisco; now part of Webex
Pricing Model Free Basic plan, annual licenses, one-time event plans, and enterprise quote-based licensing
Free Trial Free Basic plan; no separate paid-plan trial publicly surfaced
Contract Free, one-time, annual, or enterprise contract depending plan
Attendee Capacity 200, 1,000, or 5,000 participants on standard paid plans; higher via enterprise quote
Mobile App No dedicated iOS/Android app as of March 30, 2026; participants join through the mobile browser
Offline Capability No
Data & Compliance AWS infrastructure in EU regions (Ireland and Germany) with SOC 2 and ISO 27001/27017/27018/27701 coverage
Expertise Level Beginner
Event Types
ConferencesWebinarsHybrid EventsTown HallsInternal All-HandsTraining Sessions
Key Integrations
PowerPoint (Native) Google Slides (Native) Webex (Native) Microsoft Teams (Native) Zoom (Native)
Support Channels
EmailHelp CenterContact Form
Best For
  • + Conference sessions that need moderated Q&A, anonymous questions, and upvoting so the most useful audience questions rise to the top
  • + Webinars and hybrid events where attendees need to join from a browser or QR code without downloading another app
  • + Teams already presenting in PowerPoint, Google Slides, Webex, Microsoft Teams, or Zoom
  • + Event producers who want a lightweight engagement layer alongside a separate registration or event-management stack
Not For
  • Organizers who need registration, agenda management, exhibitor tools, networking, and onsite operations in one product
  • Budget-sensitive one-off events that will outgrow Basic but do not need an ongoing annual license
  • Events that need a dedicated attendee mobile app experience
  • Onsite activations that depend on robust offline interaction or venue-proof fallback workflows
Key Capabilities
Run moderated audience Q&A with anonymous submissions and question upvoting
Launch live polls, surveys, word clouds, and quizzes during sessions
Present interactions directly inside PowerPoint and Google Slides
Use Slido within Webex, Microsoft Teams, and Zoom workflows
Let attendees join with a browser, QR code, direct link, or simple event code without installing an app
Export poll, Q&A, and analytics data on paid plans for post-event reporting
Embed Slido in a website or event app and pair it with live video for hybrid delivery
Honest Limitations

Not an all-in-one event platform

Slido handles session engagement extremely well, but you still need another tool for registration, agenda management, exhibitor workflows, networking, or onsite logistics.

Pricing is harder to compare than it should be

The public pricing experience is JS-heavy and light on exact detail. Buyers can confirm plan structure publicly, but often need community docs or sales contact to fully understand fit.

Advanced value depends on your plan

Moderation controls, branding, security settings, collaboration features, and participant-authentication options vary meaningfully across Engage, Professional, Enterprise, and one-time tiers.

Mobile apps are gone

Slido officially discontinued its iOS and Android apps on March 30, 2026. Mobile participation still works, but only through the browser.

Offline and heavy onsite use cases are limited

Public documentation emphasizes browser-based participation and live integrations, not true offline interaction for poor-connectivity venues.

Pricing Breakdown
Plan Price Details
Basic Free Forever-free starter plan for lighter use
Annual Plans From €15/month Engage, Professional, and Enterprise annual licenses; publicly positioned as annual rather than monthly subscriptions
One-time Plans Varies by plan Single slido for up to 7 continuous days; standard participant caps of 200, 1,000, or 5,000 depending plan
Unlimited Enterprise Custom quote Flat-fee enterprise model not listed on the public pricing page

Hidden Costs to Watch

  • ! Slido does not offer monthly subscriptions; the public €15/month starting point sits within annual licensing
  • ! Annual licenses may require additional paid member seats if multiple teammates need host access
  • ! One-time plans cover a single slido for up to 7 continuous days, so multi-event programs may need multiple purchases or an annual license
  • ! Security, branding, moderation, and participant-authentication controls vary materially by plan

Slido is best understood as an audience-engagement layer that sits on top of your sessions rather than as a full event platform. For conferences, webinars, hybrid events, and all-hands meetings, it gives speakers a fast way to collect questions, run polls, launch quizzes, and keep the audience active without asking attendees to download another app.

That simplicity is why event teams keep coming back to it. Slido works natively with presentation tools like PowerPoint and Google Slides, slots into collaboration environments like Webex, Microsoft Teams, and Zoom, and makes joining easy through a browser link, QR code, or event code. If your biggest session risk is dead air, awkward mic lines, or a keynote that never gets audience input, Slido solves that problem cleanly.

Where it falls short is everywhere outside the session itself. You still need another tool for registration, agenda management, exhibitor workflows, networking, and onsite logistics, and the path from Basic to the more useful paid tiers is less transparent than it should be. For event teams that just need live interaction done well, Slido deserves a shortlist. For teams shopping for an all-in-one event stack, it should be paired with something else or replaced by a broader platform altogether.

Comparing this with other event tools?

Get a shortlist of the best-fit options for your event workflow.

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Pairs Well With

Whova

Conference-focused all-in-one platform known for strong attendee networking, sponsor visibility, and time-saving event operations.

Event Planning & Management Lead Retrieval Paid

Use Whova for agenda, attendee app, and networking while Slido handles stronger Q&A, polling, and audience participation inside sessions.

Eventbrite

Mass-market ticketing and event marketing platform with unmatched discovery reach, fast setup, and fee-heavy economics for paid events.

Registration & Ticketing Event Marketing Freemium

Use Eventbrite for simpler ticketing and registration, then add Slido when a webinar or smaller conference needs better in-session engagement.

Alternatives

Mentimeter

Presentation-first audience engagement software for live polls, quizzes, word clouds, Q&A, and workshop feedback.

Audience Response & Polling Freemium

More presentation-first and visually expressive, which can suit storytelling-heavy keynote or workshop formats better.

Poll Everywhere

Live polling, Q&A, surveys, and slideware engagement for classes, meetings, webinars, and event sessions.

Audience Response & Polling Freemium

Similar slide-integration appeal with strong crossover into meetings, training, and education environments.

Vevox

Live polling, anonymous Q&A, surveys, quizzes, and meeting engagement for classes, events, and internal communications.

Audience Response & Polling Freemium

A strong option for teams that care deeply about anonymity, classroom-style response flows, and structured meeting engagement.

Questions to Ask the Vendor
  1. 1
    At our expected audience size, which participant cap and feature set applies across annual versus one-time plans?
  2. 2
    Which analytics, exports, branding controls, and moderation tools are gated by plan?
  3. 3
    How should we structure Slido for a multi-session or multi-track event with several rooms running in parallel?
  4. 4
    What data residency and compliance options are available beyond the default EU-hosted setup?
  5. 5
    What is the recommended setup for embedding Slido inside our event app, custom event website, or hybrid production workflow?
  6. 6
    What support response times and SLA commitments are included on non-enterprise plans?
How we research tools

We research each tool by reviewing official documentation, pricing pages, and user feedback from Trustpilot, G2, and Capterra. If something's out of date or inaccurate, use the link below to flag it.

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