Straight answer: for 5000 live attendees you need Zoom Webinars (5000-tier plan or above), Cisco Webex Webinars, ON24, or RingCentral Events (formerly Hopin). Everything else marketed as "webinar software" caps out well below that, usually at 1000 or 3000, and will simply refuse your registrants at the door. Before you sign anything, check your actual registration-to-attendance ratio, because most businesses buying for 5000 never see more than 1500 people show up live.
The platforms that go to 5000
I get asked this by clients constantly, usually after a marketing director has already told the CEO "we're doing a webinar for 5000 people" without checking whether the software they're already paying for can do that. It usually can't. Here's what can:
- Zoom Webinars, 5000-attendee plan. Zoom sells webinar capacity in fixed tiers: 500, 1000, 3000, 5000, 10,000, and then custom enterprise beyond that. The 5000 tier is not on the self-serve checkout page, you have to talk to sales, and pricing is quote-based, but expect somewhere between 15,000 and 25,000 pounds a year depending on contract length and whether you bundle Zoom Events or Zoom Phone alongside it.
- Cisco Webex Webinars. Webex will take you up to 100,000 view-only attendees, but the interactive tier (people who can raise hands, chat, answer polls) is capped lower, around 10,000. For 5000 with real interaction, Webex handles it comfortably and pricing tends to land close to Zoom's, sometimes slightly cheaper if you're already a Webex Suite customer.
- ON24. Built specifically for B2B lead-gen webinars at scale. No published pricing, everything is a custom quote, and I've seen contracts from 30,000 to over 100,000 pounds a year depending on how many "engagement" features (polls, resource lists, simulive) you switch on. ON24 is overkill if you're running one big webinar a year, but if you're doing 20+ a year for demand gen, the analytics alone justify the cost.
- RingCentral Events (the platform that used to be Hopin). Handles up to 100,000 registrants and is built more like a virtual conference than a single webinar room, with expo halls and networking. Good if your 5000-person event is really a small virtual conference wearing a webinar name.
What won't work no matter how much you like the interface: GoTo Webinar tops out at 3000 on its top-tier plan. Livestorm's enterprise plan also stops at 3000. Demio caps around 1000. If your list has any of these three, stop reading the feature comparison pages and just check the attendee cap first, because that's the one spec that rules platforms in or out for this specific question. My rundown of webinar software tools for 2026 covers pricing and features for the smaller-scale options if 5000 turns out to be the wrong number for you, which brings me to the bit nobody wants to hear.
The uncomfortable number: most "5000 attendee" webinars never see 5000 people
I worked with a SaaS client in 2023 who insisted on the 5000-tier Zoom plan for a product launch webinar. Marketing had built a registration page, promoted it across three email lists totalling 40,000 contacts, ran paid social for three weeks, and got 6,800 registrations. impressive number on paper. Live attendance on the day: 1,940.
That's a 28.5% show-up rate, and it's on the higher end of normal. Industry benchmarks from ON24's own webinar reports and from ClickMeeting's usage data put average attend-to-register conversion somewhere between 35% and 50% for B2B webinars, and it drops sharply for anything scheduled more than two weeks out or run on a Friday afternoon. To have 5000 people live at the same moment, you typically need 10,000 to 14,000 registrations, not 5000.
So the real question isn't "which software handles 5000 attendees," it's "am I confident I'll have 5000 people live, and if so, what does my registration pipeline need to look like to get there." Most companies buying the 5000-tier plan are paying for headroom they'll use once, if ever, while running every other webinar that year at 15% capacity. If your typical webinar pulls 800 to 1500 live attendees, the 3000-tier plan (which is on self-serve checkout, no sales call needed, and roughly 3,400 pounds a year on Zoom) covers you with room to spare and saves you a five-figure sum annually.
What breaks at scale (and it's not the attendee cap)
The attendee limit is the easy part to check. The parts that go wrong at 3000+ live attendees are usually these:
- Chat and Q&A moderation. At 500 attendees, one host can eyeball the chat. At 5000, you need two to three dedicated moderators just to triage questions, or the Q&A box turns into an unreadable wall of text within the first ten minutes. Budget for the human cost, not just the software cost.
- Your own internet upload speed. Presenting to 5000 people from a home office on a 20Mbps upload connection is asking for trouble. Every platform recommends the presenter side have a wired connection with real upstream bandwidth, and I've seen a well-funded launch webinar stutter and freeze for the host, not the audience, because nobody checked this.
- Landing page and registration form load. If your promotion works and you get a spike of 2000 sign-ups in the 48 hours before the event, your registration page and CRM integration need to handle that without timing out. Test it under load, not just in a browser tab by yourself.
- Recording and follow-up capacity. A 5000-person live webinar usually generates 8,000 to 12,000 on-demand views afterwards if you promote the recording. Make sure your plan includes enough cloud storage and that automated follow-up emails are set up before the event, not scrambled together after.
Step by step: how to decide
Here's the process I run clients through, in order, before they spend a penny on the 5000-tier plan:
- Pull your last three webinar attendance numbers. Not registrations, live attendance. If you've never run a webinar before, use the low end of the 35% benchmark against your realistic registration target.
- Multiply your target live attendance by 2.5 to 3. That's your realistic registration goal. Needing 5000 live means aiming for 12,500 to 15,000 sign-ups.
- Check whether your list and promotion budget can generate that many registrations. If your email list is 8,000 people and you've never run paid promotion for a webinar, 12,500 registrations isn't happening from one campaign. This is where content distribution matters, and it's worth building a proper promotion plan using guest blogging to build the authority and reach that gets a webinar in front of an audience big enough to justify a 5000-cap platform in the first place.
- Get the quote for the tier you need, not the tier that sounds impressive. Call sales for the 3000-tier before you call for 5000. Ask directly what the price jump is between tiers, because on Zoom it's a steep curve, not a gentle slope.
- Run a load test with the vendor. Every enterprise webinar vendor worth the money will do a technical rehearsal call with you before a large event. Ask for it. Don't assume the platform "just works" at scale because it worked fine at 200 attendees.
- Build the moderation and follow-up plan alongside the software decision, not after. The software is maybe 30% of what makes a 5000-person webinar succeed. The other 70% is promotion, moderation, and what you do with the recording and the leads afterwards.
What to do if 5000 is the wrong number
If step one above tells you your realistic live attendance is 800 to 2000, buy a mid-tier plan (Zoom's 3000-tier, Livestorm's enterprise plan, or Webex's standard webinar plan) and put the money you save into promotion instead. A better-attended 1500-person webinar with strong follow-up beats a half-empty 5000-cap room every time, and the recording afterwards is where the real value sits anyway. If you're building a content and lead-gen engine around your webinars long-term, it's worth thinking about how the recordings and transcripts feed into other content, because a good webinar can quietly become several months of blog posts, and understanding how blog content earns money over time changes how you plan the whole campaign, not just the software.
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If 5000 is the right number, because you're launching to an existing audience of that size, or running a partner event with co-promotion across multiple lists, then commit: book the enterprise tier, get the technical rehearsal, staff the moderation, and build the follow-up sequence before the event, not the week after.
Related: the software page.
Frequently asked questions
What's the cheapest webinar software that supports 5000 attendees?
Zoom Webinars is usually the cheapest route to a genuine 5000-attendee cap, with enterprise pricing typically starting around 15,000 pounds a year for that tier, though you'll need to speak to sales rather than checkout online. Webex often comes close if you're already on a Cisco contract.
Does Zoom's standard plan support 5000 attendees?
No. Zoom's self-serve plans on the checkout page go up to 1000 attendees. The 3000, 5000, and 10,000-attendee tiers require a sales conversation and custom pricing, and are not visible on the standard pricing page.
How many registrations do I need to get 5000 people live on a webinar?
Plan for 10,000 to 14,000 registrations, since typical live attendance runs 35% to 50% of registrations for B2B webinars. Fewer registrations means fewer live attendees no matter how good the platform is.
Is GoTo Webinar or Livestorm suitable for 5000 attendees?
No, both cap out at 3000 attendees on their top-tier enterprise plans, so if you need a genuine 5000-person capacity you'll need to move to Zoom Webinars, Webex Webinars, ON24, or RingCentral Events instead.
