If you've ever shipped a webinar, a product launch, or a community meetup, you've probably bumped into AddEvent. It's been around since 2012, ranks for "add to calendar button" everywhere, and ships exactly the kind of thing you'd hope for: drop-in calendar buttons, ICS files, and RSVP pages.
But the tool's pricing has crept up faster than its feature set, and the calendar-marketing space has filled out around it. This post is the honest field guide.
We re-checked every price + feature on this list against the vendors' live pricing pages in April 2026. No copy-paste vendor decks, no AI-summarised feature lists. Where a tool is genuinely better than us, we say so. Where we beat them, we'll show you the math.
Key takeaways
- ✓AddEvent's cheapest paid plan is $29/mo (yearly) — not $19. Their pricing page lists Small Business at $29/$36, Pro at $99/$129, and Enterprise as custom.
- ✓Every paid AddEvent plan has hard click + RSVP caps. Most teams running webinar funnels need at least the Pro tier or they break mid-campaign.
- ✓There are five real alternatives in 2026 plus two open-source / library options. Two products that older comparison posts mention (OneTap.so, CalGet) don't actually exist.
- ✓If you need flat-rate unlimited clicks at the entry tier, the only option in this comparison is SpreadEvent at $27/mo. Everyone else meters.
What changed about AddEvent in 2026
AddEvent's tooling itself is still solid: the button widget renders cleanly across email clients, the ICS files validate against RFC 5545 (one of the few tools that handles timezone edge cases consistently), and the RSVP page works.
The friction is the pricing. The Hobby (free) plan caps you at 100 clicks/month, 20 RSVPs, and 1 calendar. Small Business at $29/mo lifts that to 2,500 clicks + 1,000 RSVPs but is single-user. Pro at $99/mo (yearly) gets you 10,000 clicks. Beyond that you're talking to sales for an Enterprise quote.
If your campaign goes well — congratulations, you're either upgrading mid-cycle or your buttons stop working.
Click caps apply on every paid AddEvent tier
There is no truly unlimited monthly plan listed publicly on addevent.com/pricing. Every tier (including Pro at $129/mo monthly) has a click ceiling — and the ceiling is enforced. Always check the cap before signing up. If your buttons go viral, the math gets brutal.
How we evaluated each tool
We tested all seven against the same checklist:
- Free tier honesty: is there a real free plan, or a 14-day trial pretending to be free?
- Click caps: what's the per-month or per-event ceiling, and what happens at the limit?
- Embed quality: does the button render correctly in email (Outlook, Gmail, Apple Mail), or only on a website?
- Calendar coverage: Google, Apple, Outlook, Office 365, Yahoo — all of them?
- RSVP support: real registration forms with capacity and waitlist, or just a button?
- Developer story: public REST API, webhooks, Zapier — or vendor lock-in?
- Branding: can you remove the "Powered by" watermark, or are you stuck with it?
- Real pricing: what's the cheapest sustainable plan, not the loss-leader entry tier?
For each tool we ran the same scenario in our heads: a 200-RSVP webinar with embed buttons in three places (registration page, confirmation email, reminder email). That's the volume where the "free" plans on most tools quietly stop working.
Want to skip the comparison?
SpreadEvent has a Free plan (3 events, 50 RSVPs each, 100 clicks/month) and Pro from $27/mo with no usage caps. The honest add-to-calendar tool.
1. SpreadEvent — the honest add-to-calendar tool
Best for: Marketers and founders who want clear limits on Free, no surprise caps on Pro, and a developer-grade API without an enterprise quote.
We're including ourselves first because skipping the host of the blog post would be weird. Read this section critically.
SpreadEvent ships the same core that made AddEvent successful — calendar buttons + RSVP pages + ICS files — with three deliberate differences. First, a Free tier that's actually free forever (3 events, 50 RSVPs each, 100 clicks/month, no credit card). Second, a Pro plan at $27/month yearly that has no click cap, no RSVP cap, and no event cap. Third, a public REST API + webhooks + Zapier integration on the same Pro tier, instead of being locked behind enterprise pricing.
The five embed variants — button, dropdown, link, email-friendly icon row, QR code — were built to render correctly in every email client we could test. The email variant is just a row of provider icons, because we got tired of HTML buttons breaking in Outlook 2019.
Where AddEvent still beats us: longer track record, more agency case studies, deeper HubSpot/Salesforce integrations. If your event stack is built around marketing-suite platforms, AddEvent has the integration history.
Pricing: Free forever (3 events, 50 RSVPs/event, 100 clicks/mo). Pro $27/mo yearly or $33/mo monthly, 14-day trial, credit card required for Pro trial.
2. AddEvent — the incumbent
Best for: Teams already deeply integrated with AddEvent's HubSpot or Salesforce extensions and unwilling to migrate.
AddEvent's product itself is fine. The button widget is reliable, the ICS output validates correctly across calendar apps, and their support team responds. The RSVP page is clean and converts.
The two friction points are pricing and the click caps. At $29/mo (yearly) for Small Business you get 2,500 clicks + 1,000 RSVPs + 1 user. Pro at $99/mo yearly lifts you to 10,000 clicks + 10,000 RSVPs + 5 users. Enterprise is a sales conversation. We've talked to teams running webinar funnels who needed the Pro tier just to clear monthly campaign volume — and even there the caps still apply.
Where it wins: API maturity (especially Salesforce + HubSpot integration depth). Tracking-pixel support for Google Analytics 4 is the most reliable in the space.
Where it loses: price-to-value at scale, opaque cap behaviour, slow product roadmap. The free Hobby tier (100 clicks/mo, 1 calendar) is too tight for real evaluation.
Pricing (verified April 2026): Hobby Free (100 clicks/mo, 20 RSVPs). Small Business $29/$36 (2,500 clicks). Pro $99/$129 (10,000 clicks). Enterprise: custom.
3. Add to Calendar Button (open-source) — the developer's choice
Best for: Developers building static sites, content sites, or products with technical resources who want zero vendor relationship.
The Add to Calendar Button library by Jens Kuhr is, in our honest assessment, the best-engineered open-source add-to-calendar widget that exists. Apache-licensed, supports every calendar provider, accessible by default, actively maintained, and ships clean copy-paste snippets for any CMS.
If you're a developer building a content site, blog, or marketing page, and you want a calendar button that works without paying anyone, this is genuinely the right tool. Drop a script tag, configure the event JSON, ship.
The license has one practical wrinkle: you cannot legally use it as the foundation of a hosted event-sharing service (the maintainer wants to keep that revenue stream for Add to Calendar PRO — see below). For end-of-funnel buttons on your own site though, it's perfect.
Where it wins: free forever, no vendor relationship, fully self-hosted, excellent docs, modern CSS without theming dependencies.
Where it loses: no analytics, no central dashboard, no RSVP forms, no email-safe variant (it's a JS widget — won't run in email clients).
Pricing: Free, MIT-licensed-with-copyright-notice. Self-host or use a public CDN.
4. Add to Calendar PRO — the paid hosted version
Best for: Marketers who liked the open-source library's design but need RSVPs, a dashboard, or hosted ICS files.
Add to Calendar PRO is the paid SaaS layer over the same library, run by the same maintainer. It adds RSVP forms, hosted ICS endpoints, a no-code editor, and analytics — the things the OSS library deliberately leaves out.
If you already use the OSS library and want to graduate to a hosted dashboard without changing widget vendors, PRO is the path of least resistance. The free trial is generous enough to evaluate.
Where it wins: smooth upgrade path from the OSS library, same widget API, the maintainer is responsive on GitHub.
Where it loses: the cheapest paid tier is feature-thin; you'll feel the limits faster than with AddEvent or SpreadEvent.
Pricing: Plans listed on add-to-calendar-pro.com — entry tier is monthly with event-count caps. Always check the live page for the current rate.
5. Eventable — the quiet alternative
Best for: Teams who want a more focused alternative to AddEvent and don't need an established roadmap.
Eventable is still very much alive in 2026 — we say this because earlier comparison posts (including, embarrassingly, our first draft) wrote them off as defunct. The site is current, the product is shipping, and the Starter plan at $20/month is the cheapest paid plan in this comparison.
The catch is that Eventable's pricing page hides the actual usage limits behind signup — you have to create an account to see what "Starter" includes per month. The Starter copy describes "Add to Calendar buttons, plugins, auto-updating events" but not numerical caps. We can't honestly compare the limits because they're not public.
Where it wins: lowest published paid-tier price ($20/mo), still actively maintained.
Where it loses: opaque limits, smaller marketing footprint than AddEvent, fewer publicly documented integrations.
Pricing: Starter $20/mo (specific limits not published). Enterprise: custom.
6. Sched — different category, worth knowing about
Best for: Conferences and multi-session events where the calendar button is one feature among many (sessions, speakers, mobile app).
Sched isn't really an add-to-calendar tool — it's a full event-management platform for conferences and multi-track events. We include it because it ranks for the same searches and because its pricing model is different enough that it changes how you think about the comparison.
Sched is per-event pricing, not monthly subscription. The Launch tier starts at $50 for one event (250 attendees included), and prices climb in 250-attendee buckets up to $325 for the Premium tier. Enterprise quotes for ongoing programs.
If you're running one big conference per quarter, Sched might be cheaper than a monthly subscription. If you're running ongoing webinars or releases, the per-event math gets ugly fast — but you'd also be using Sched for things AddEvent and SpreadEvent don't do (session scheduling, speaker management, attendee mobile app).
Where it wins: native session scheduler, attendee mobile app, speaker management, integrated check-in.
Where it loses: wrong category for "I just need a calendar button," opaque pricing on the public page (most numbers come from third-party listings).
Pricing: Launch from $50/event (250 attendees). Standard / Premium tiers up to $325/event. Enterprise: custom. See Sched's pricing page for the current breakdown.
7. Calendar Link (open-source library) — the DIY option
Best for: Developers who want to generate calendar links in code without any UI library at all.
calendar-link by Anand Chowdhary is a small, MIT-licensed npm package that generates Google, Outlook, Yahoo, and ICS calendar URLs from a JavaScript object. 622 stars, last published v2.11.0 in June 2025, ~30k weekly npm downloads.
There's no SaaS, no hosted version, no UI components — just a function that turns event metadata into calendar URLs. You wire the buttons yourself. If you're building a custom registration flow inside an existing React app and you don't want to load a UI widget, this is the lightest possible dependency you can pick.
Where it wins: smallest possible dependency footprint, MIT license with no UI opinions, easy to wrap in your own components.
Where it loses: literally no UI — you have to design and ship the buttons yourself. No analytics, no dashboard, no RSVP, no anything beyond URL generation.
Pricing: Free. npm install calendar-link.
Comparing tools is exhausting
If you just want a calendar button that works in email, an RSVP page, and analytics — try SpreadEvent free. No credit card.
Side-by-side: the numbers that matter
| Feature | SpreadEvent | AddEvent | Eventable | Add2Cal PRO | Sched |
|---|---|---|---|---|---|
| Free tier (forever) | 3 events, 100 clicks/mo | 100 clicks/mo, 1 calendar | None (paid only) | Trial only | 30-day trial only |
| Cheapest paid plan | $27/mo (yearly) | $29/mo (yearly) | $20/mo (limits hidden) | Entry tier (see site) | $50/event (250 attendees) |
| Truly unlimited from | $27/mo (no caps) | Not publicly listed | Custom Enterprise | Not listed | Not applicable (per-event) |
| Email-safe button (icon row) | ✓ | ✓ | limited | ✗ | ✗ |
| RSVP form with waitlist | ✓ | ✓ | ✓ | ✓ | ✓ |
| Public REST API | ✓ | Pro+ | Enterprise | Pro | Enterprise |
| Zapier integration | ✓ | ✓ | limited | ✗ | ✓ |
| Remove vendor branding | $27/mo | $29/mo+ | $20/mo | Paid tier | Always included |
Why we dropped two products from older comparisons
Older "AddEvent alternatives" posts often list OneTap.so and a service called CalGet. We checked both directly: OneTap.so is an unregistered domain (NXDOMAIN), and CalGet doesn't appear to exist as a real product. If you find them on a comparison post, that post is uncritically recycling stale lists. Don't shop from those.
When NOT to pick SpreadEvent
We'll call our own shots, because pretending we win every scenario isn't useful to you.
Pick AddEvent if you're already deeply integrated with their HubSpot or Salesforce add-ons and the migration cost outweighs the pricing delta. Their integration depth with marketing-suite platforms is still ahead of ours.
Pick the Add to Calendar Button open-source library if you're a developer building a static or content site and you want zero vendor relationship. The library is genuinely excellent and we recommend it openly.
Pick Sched if you're running a multi-day, multi-track conference where session scheduling and speaker management matter more than the calendar button itself. It's not really competing with AddEvent or us — it's a different category.
Pick the calendar-link npm package if you're building a custom registration UI in your own product and don't want any widget dependency at all.
Pick us if your events run regularly, you want analytics that tell you which embed converted, you need an email-safe variant that renders in Outlook, and you don't want surprise click caps mid-campaign.
How to switch from AddEvent to SpreadEvent
If you're moving over, the migration is straightforward enough that we wrote a separate guide for it (linked below). The short version:
- Export your existing event list from AddEvent (CSV download is in their dashboard under Account → Export).
- Re-create events in SpreadEvent — the API supports bulk creation if you have more than 10.
- Generate new embed codes (the calendar links will be new — old AddEvent links keep working until you remove them, so there's no rush to delete buttons in the wild).
- Update tracking pixel IDs (GTM/GA4/FB Pixel all carry over).
- Cancel AddEvent at the end of your billing cycle.
We've moved customers across in under an hour for sub-50 events, and we'll do it for you on Pro plans. Email hello@spreadevent.com and reference this post.
FAQ
As of April 2026, AddEvent's cheapest paid plan is Small Business at $29/month yearly or $36/month monthly — not the $19 figure that appears in older comparison posts. The free Hobby tier is 100 clicks/month and 1 calendar; Pro is $99/$129 monthly with 10,000 clicks; Enterprise is a sales conversation. All paid tiers have hard click ceilings.
Bottom line
If you want one tool to bookmark from this post, save the pricing comparison table above. The right pick depends on whether you need a button or a platform — but the right pick is rarely AddEvent at $99/month with click caps when SpreadEvent is $27/month without them.
If we're the right fit: start free at spreadevent.com. No credit card, three events to play with, upgrade only when you outgrow it.
If we're not the right fit: pick from the list above honestly. We'd rather you went elsewhere with the right tool than locked into the wrong one and remembered us as the people who pushed it.
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