Booknetic vs Amelia: Pricing, Features & Which One to Choose for WordPress Bookings

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Booknetic vs Amelia: Pricing, Features & Which One to Choose for WordPress Bookings

If you are choosing between Booknetic and Amelia, you are choosing between two of the most capable WordPress appointment booking plugins on the market — and the wrong pick can quietly cost you a year of staff training, plan upgrades, and integration rework. Both run a real service business on WordPress, both compete head-to-head on feature scope, and both have public ratings strong enough to take seriously. The honest decision comes down to which buyer profile each plugin actually fits.

I tested both plugins end-to-end inside the WordPress admin. For Booknetic, that meant configuring a wellness studio in WordPress 6.9.4 with Booknetic 5.2.6 and the full Boostore add-on suite, then submitting a complete front-end booking and verifying it landed in Calendar, Appointments, and Customers. For Amelia, that meant doing the same on a licensed Amelia v9.4 install — building location, employee, and service from an empty environment, then walking the public widget through Date & Time → Your Information → Payments. I cross-checked both pricing pages, read public reviews on WordPress.org, CodeCanyon, Capterra, Trustpilot, and Reddit, and aligned the verdict with the cluster's testing notes and review drafts.

This is a practical comparison, not a brand pitch. Below is the side-by-side evidence, an honest verdict per use case, and a clear recommendation for the buyer profiles each plugin actually fits.

Quick Verdict: Booknetic vs Amelia

Both plugins are good answers to the WordPress appointment booking question. The pick depends on what your business actually does.

  • Choose Booknetic if you run a WordPress-based service business and want a complete platform — multi-staff, multi-location, real workflow automation, an in-panel add-on marketplace, and a native mobile app for your team.
  • Choose Amelia if you also run ticketed events alongside appointments, you want the most polished WordPress booking admin available, or you need a free WordPress.org tier to start with no upfront budget.

Quick mapping by buyer profile:

  • Overall winner for a WordPress service business: Booknetic — broader operational depth and a dedicated SaaS-style admin.
  • Best for appointments plus ticketed events in one plugin: Amelia — the events module with QR-coded e-tickets is genuinely rare in this category.
  • Best free starting tier: Amelia — free Lite on WordPress.org; Booknetic does not currently advertise a free version.
  • Best for agencies and multi-location brands: Booknetic — Premium and Elite tiers ship for multi-site agency work, with white labeling included on Elite.
  • Best across-the-board paid pricing: Amelia — generally cheaper at every paid tier including lifetime ($799 Elite versus Booknetic's $899 Elite).
  • Best bundled-add-on value at the top tier: Booknetic Elite — all 50+ paid Boostore add-ons included once you actually need most of them.

Quick Comparison Table

CriteriaBookneticAmelia
Best forWordPress service businesses, multi-location brands, agenciesService businesses and event organizers wanting a polished admin and an events module
Starting price$45/yr (Basic) — no free tier on the pricing pageFree Lite on WordPress.org; Starter from $49/yr
Free version / trialNo live free version; 14-day money-back on paid plansFree Lite on WordPress.org; 15-day money-back on paid plans
Core workflow fitStep-by-step widget + dedicated SaaS-style admin + drag-and-drop Calendar + Workflow engine + BoostoreThree-step widget + Vue + Element Plus admin + Catalog data model + Customize hub + Events module
Feature depthBroad core; 50+ paid Boostore add-ons; native mobile appBroad core; tier-gated unlocks; built-in events with QR e-tickets
UI/UXFull-screen panel hides standard WordPress chrome (8.7/10)Modern SPA with dark/light theme, sits inside WP admin chrome (8.4/10)
Pricing/valuePremium and Elite are where the value lands once Boostore add-ons enter the picturePro is the rational floor for most production sites; cheaper at every paid tier
Integrations / paymentsStripe, PayPal, Square, Mollie, Razorpay, Mercado Pago, Vipps, 2Checkout, Netopia, plus Telegram and Amazon SNS via BoostoreSquare (every paid plan), Stripe, PayPal, Mollie, Razorpay, WooCommerce, Stripe Connect; Apple Calendar, Microsoft Teams, WP Fusion are Amelia-only
Support / reputationCodeCanyon 4.91/5 (471), Capterra 4.5/5 (103), Trustpilot 3.4/5 (21)WordPress.org 4.6/5 (761), Capterra 4.9/5 (245), Trustpilot 3.6/5 (232)
Best reason to choose itMost complete WordPress booking platform with native mobile app and in-panel add-on marketplaceBuilt-in events module with QR e-tickets and a real free Lite tier
Main reason to skip itNo free tier and many high-value capabilities live in paid Boostore add-onsPlan-tier gating pushes most production sites onto Pro; no native mobile app
Full reviewBooknetic reviewAmelia review

Product Overview

What is Booknetic?

Booknetic is a WordPress appointment booking and scheduling plugin built by FS Code that runs entirely inside a self-hosted WordPress site. It targets service businesses — wellness studios, clinics, salons, fitness centers, tutors, consultants, and agencies — that prefer WordPress-native control over a separate SaaS scheduler. The product covers the standard booking jobs (services, staff, locations, schedules, customers, payments, notifications) inside a dedicated full-screen admin panel and renders a step-by-step booking widget on the public site through a single shortcode. Most commercially important capabilities — Stripe, Google Calendar, Zoom, SMS, white labeling, native mobile app — are sold as paid Boostore add-ons rather than bundled into the base plan. Plans are differentiated mostly by how many of those add-ons are included, with all 50+ unlocked on Elite.

What is Amelia?

Amelia is a WordPress booking plugin from Melograno Ventures (originally TMS) that handles appointments, group bookings, packages, recurring services, and ticketed events from inside the WordPress admin and renders a step-by-step or catalog-style widget on any page through a shortcode. It is built for service businesses and event organizers — beauty and wellness, healthcare, fitness, photography, coaching, event agencies — that want bookings on their own WordPress site rather than on a separate SaaS scheduler. The plugin has one of the most polished admin SPAs in this category, a dedicated Customize hub for branding with live preview, and a built-in events module with QR-coded e-tickets that almost no competitor offers in the same product. There is a free Lite edition on WordPress.org plus four paid plans, with most production sites landing on Pro to unlock Google Calendar two-way sync, video meetings, and event tickets.

Setup and Onboarding

Amelia is faster on day one if you start from zero. The Setup Wizard walks you through company defaults, the Vue + Element Plus SPA admin is responsive, and the Customize hub gives instant control over branding via live preview. The friction is the empty default state — no demo data, no sample services — and the location-required-on-employee constraint that catches first-time admins on the first save.

Booknetic onboarding is more deliberate. The Starting Guide walks new admins through Company details → Business hours → Create location → Create staff → Create service in a logical order, and the dedicated full-screen admin panel removes most of the WordPress chrome while you work. The trade-off is depth: General Settings and the Service modal each carry a fair amount of optionality, so plan an extra hour after the basics for payment, calendar sync, and notification add-ons that need third-party credentials.

Winner: Amelia — faster first-time setup and a more guided onboarding experience for buyers who want a working booking form quickly.

Admin UI and Ease of Use

The two admins represent two different design philosophies, and both are credible.

Booknetic loads its own full-screen panel inside WordPress with its own sidebar — Dashboard, Calendar, Reports, Appointments, Packages, Customers, Services, Staff, Locations, Workflow, Boostore, Appearance, Coupons, and Settings — and hides the WordPress top bar while you are inside it. Most modules use a consistent datatable + modal pattern, so the learning curve flattens after the first few screens. The admin Calendar offers Month / Week / Day / List views with drag-and-drop rescheduling, which is what service-business admins actually spend most of their time on.

Amelia keeps you inside the WordPress admin chrome — non-technical staff still see Posts, Pages, and Plugins alongside the booking screens — but the SPA inside that chrome is one of the most modern booking-plugin admins available. The dark/light theme, the Customize hub with six dedicated live-preview editors (Step-by-step, Catalog, Events calendar, Events list, Customer panel, Employee panel), and the Features & Integrations toggle panel make Amelia feel like a SaaS product that happens to render in WordPress. The cognitive cost is that configuration is split across three places (Settings tabs, Features & Integrations, per-module Customize editors), and knowing where a given setting lives is part of getting fluent.

Winner: Tie — Booknetic wins on day-to-day calendar workflow and SaaS-style isolation; Amelia wins on first-impression polish and live-preview branding. The right answer depends on whether your team values a dedicated booking workspace or a polished SPA inside the standard WordPress shell.

Frontend User Experience

Both front-end widgets are clean, short, and convert cleanly to a confirmation. The differences are step count and how much the widget anticipates the customer.

Booknetic step-by-step booking widget on a WordPress page

Booknetic renders a longer step strip — Location → Staff → Service → Service Extras → Date & Time → Information → Cart → Confirmation — with a clear sidebar showing progress. The Service Extras step auto-skips when no extras are configured. In testing, picking a location auto-loaded the linked staff, the staff card filtered to the linked services, and the Date & Time step rendered the calendar grid with available days marked in green. The confirmation screen exposes confirmation number plus Add to Google Calendar and Add to iCal buttons inline.

Amelia front-end booking widget — Date & Time step with calendar

Amelia renders a tight three-step strip — Date & Time → Your Information → Payments — with a left-side step menu and a single Continue button per step. With one category and one service, Amelia auto-skipped the explicit service-picker screen and put the customer straight into the calendar. Picking a date instantly revealed a 30-minute slot strip for the assigned employee, and the chosen slot showed up in the side menu before I needed to confirm — small but real conversion details. The post-submit page surfaces Add to Calendar (Google / Outlook / Yahoo / Apple) and the full appointment summary.

Winner: Tie — Booknetic's longer flow makes more sense for businesses with multiple locations and staff to choose from; Amelia's three-step flow is shorter and converts more cleanly when you only have one service or one employee. Both are above the WordPress booking-plugin baseline.

Features and Workflow Depth

Both plugins cover the foundational booking jobs — services, staff, locations, schedules, deposits, recurring appointments, group bookings, multilingual, coupons, taxes, invoices, custom forms, REST API. The differentiation lives at the edges.

Booknetic is stronger on workflow automation and operational breadth. The Workflow engine maps booking events (created, approved, rescheduled, completed, cancelled) to actions like email, SMS, WhatsApp, Telegram, webhook, or Mailchimp through a builder rather than a config file. The native mobile app for staff and admins is a real differentiator — Amelia does not currently ship one. Boostore itself surfaces 50+ paid add-ons inside the admin: payment gateway breadth, calendar sync, video meetings, packages, gift cards, loyalty points, white labeling, custom statuses, custom forms with conditional logic, and more.

Amelia is stronger on ticketed events and branding. The Events module handles one-time and recurring events, multiple ticket tiers (VIP / General / Early Bird), waiting lists, and QR-coded e-tickets attached to confirmation emails — the rare differentiator that almost no other WordPress booking plugin includes in the same product. The Customize hub is the second real differentiator: most competing plugins do not have a dedicated branding surface with live preview at all. The Notifications module is a third strength — Email, SMS, and WhatsApp tabs in one matrix with placeholder pills for safer template editing.

Winner: Booknetic for pure appointment-booking depth and operational breadth; Amelia for the events module and Customize hub. Pick the one whose strongest feature set matches your business model.

Pricing and Add-on Model

The pricing models are structurally different, which matters more than the headline numbers.

Booknetic's plan logic is mostly about how many Boostore add-ons are included, not core feature caps:

  • Basic — $45/yr or $99 lifetime — 1 domain — 6 months support — 0 paid add-ons
  • Standard — $99/yr or $239 lifetime — 1 domain plus staging — 6 months support — 8 paid add-ons of your choice
  • Premium — $199/yr or $599 lifetime — 5 domains plus 5 staging — 1 year support — 19 paid add-ons of your choice
  • Elite — $299/yr or $899 lifetime — unlimited domains — 1 year priority support — all 50+ paid add-ons included

Booknetic ships a 14-day money-back guarantee on paid plans and does not currently advertise a free version on the pricing page.

Amelia gates features by tier rather than by add-on slot count:

  • Lite — Free on WordPress.org — 1 domain, 1 employee, Square-only payments, basic step booking
  • Starter — from $49/yr — 1 domain — annual only — adds notifications, group bookings, coupons, extras, taxes, invoices, multilingual, custom reminders, recurring appointments, deposits
  • Standard — from $89/yr or $299 lifetime — 1 domain — adds REST API, packages, resources, cart, marketing analytics, WhatsApp, refunds, multi-gateway payments
  • Pro — from $149/yr or $449 lifetime — 5 domains — adds Google / Apple Calendar two-way sync, Zoom / Google Meet / Microsoft Teams, event tickets with QR codes, waiting list, custom service duration, pricing-by-people, webhooks, WP Fusion
  • Elite — from $259/yr or $799 lifetime — unlimited domains — adds developer-level customization across all modules

Amelia ships a 15-day money-back guarantee on paid plans and runs sales that show alongside regular pricing — verify exact numbers on the official Amelia pricing page before buying.

The honest take: Amelia is generally cheaper at every paid tier including lifetime ($799 Elite versus Booknetic's $899 Elite) and has a real free Lite tier, which makes it the better budget option. Booknetic's Premium and Elite plans are where the bundled-add-on math starts to win — you get all 50+ Boostore add-ons (white label, mobile app, payment gateway breadth, packages, gift cards, loyalty points, and more) in one Elite license, which Amelia simply does not match feature-for-feature.

Winner: Amelia for headline price per tier and free entry; Booknetic Elite for "everything included once I actually need most of it." Map your add-on list to the tier before choosing.

Integrations and Payments

Both plugins ship the integrations most production sites need, but at different tiers and with different gaps.

Both support Stripe and PayPal at the right tier, both support two-way Google Calendar sync, both support Zoom and Google Meet, both support WhatsApp at some tier, both expose REST API and webhooks. Past that, the catalogs diverge.

Booknetic's payment gateway breadth via Boostore is the wider catalog: Stripe, PayPal, Square, Mollie, Razorpay, Mercado Pago, Vipps, 2Checkout, Netopia, plus regional providers. Booknetic also covers notification routing more broadly — Telegram and Amazon SNS via Boostore in addition to email and SMS.

Amelia's exclusive integrations are Apple Calendar two-way sync, Microsoft Teams, and WP Fusion. The last one is the biggest hidden lever — WP Fusion connects to 50+ CRM and marketing platforms in a single integration, so an Amelia + WP Fusion install can talk to almost any modern CRM/marketing stack out of the box. Booknetic does not have an equivalent.

Winner: Booknetic for payment gateway breadth, especially for regional markets; Amelia if Apple Calendar, Microsoft Teams, or WP Fusion are already in your stack.

Support, Documentation, and Reputation

Both vendors run serious documentation libraries, public Discord communities, ticket support, and active YouTube channels. The public review picture is mixed for both, in different ways.

Booknetic — CodeCanyon 4.91/5 (471 reviews) is the strongest verified-buyer rating in this comparison; CodeCanyon requires a verified purchase before leaving feedback. Capterra sits at 4.5/5 (103 reviews) with ease of use 4.4 and customer service 4.3. Trustpilot is the outlier at 3.4/5 (21 reviews — small sample). Recurring complaints in public threads cluster around add-on cost and the gap between Basic and the plans that actually include the add-ons buyers need.

Amelia — WordPress.org 4.6/5 (761 reviews) on the free Lite plugin reflects 90,000+ active installations. Capterra is the bright spot at 4.9/5 (245 reviews) with Customer Service rated 4.9 — the highest sub-score in this comparison. Trustpilot sits at 3.6/5 (232 reviews — a bigger sample) with recurring complaints around the December 2025 v9 launch breakage, ticket response latency, and a "blamed on user setup" pattern. The fast bugfix cycle (v9.0 through v9.4 between December 2025 and April 2026) suggests Amelia has been working through the v9 tail.

Winner: Tie — Booknetic has the higher verified-buyer rating profile (CodeCanyon) and a smaller Trustpilot sample. Amelia has the higher Capterra Customer Service rating and a much larger WordPress.org footprint, balanced against the v9 launch tail. Both publishers are responsive in their respective communities.

Performance and Reliability Impression

Performance was a tie in testing.

Booknetic admin pages loaded within ~1–2 seconds across modules in the test environment, the front-end booking widget transitioned between steps without visible lag, and the Date & Time step rendered the calendar grid plus available-day markers in well under a second after each click.

Amelia's SPA navigation between admin screens was instant once the admin loaded; the front-end widget transitioned without lag and the time-slot strip rendered immediately after picking a date. The widget script bootstraps on first load via ameliaShortcodeData, so the first paint takes ~1–2 seconds.

Reliability impression diverges slightly on the public record. Booknetic has shipped point releases (5.2.0, 5.2.4, 5.2.6, plus a 5.6.0 beta) on a steady cadence with no public outage events flagged. Amelia's December 2025 v9.0 launch caused calendar breakage for multiple users and triggered a fast bugfix cycle that ran into May 2026 — the public-record reliability tail on Amelia is real, although the v9.4 build I tested was stable end-to-end.

Winner: Booknetic — performance was tied in testing, but the public-record reliability profile in the recent six months favors Booknetic.

Pricing Comparison

Quick side-by-side at the official tiers (verify current sale or regular pricing on each vendor's pricing page before buying):

  • Free tier: Amelia ships a free Lite plugin on WordPress.org; Booknetic does not currently advertise a free version on its pricing page.
  • Entry paid tier: Amelia Starter from $49/yr; Booknetic Basic at $45/yr or $99 lifetime. Booknetic Basic ships zero paid add-ons; Amelia Starter unlocks notifications, group bookings, coupons, extras, taxes, invoices, multilingual, custom reminders, recurring appointments, deposits.
  • Mid tier: Amelia Standard from $89/yr or $299 lifetime; Booknetic Standard at $99/yr or $239 lifetime. Amelia Standard unlocks multi-gateway payments, REST API, packages, resources, cart, marketing analytics, WhatsApp, refunds. Booknetic Standard ships 8 Boostore add-ons of your choice.
  • Pro / Premium tier: Amelia Pro from $149/yr or $449 lifetime; Booknetic Premium at $199/yr or $599 lifetime. Amelia Pro is the first tier that unlocks Google / Apple Calendar two-way sync, video meetings, event tickets, waiting lists, WP Fusion. Booknetic Premium ships 19 Boostore add-ons of your choice.
  • Top tier: Amelia Elite from $259/yr or $799 lifetime; Booknetic Elite at $299/yr or $899 lifetime. Booknetic Elite includes all 50+ paid Boostore add-ons (mobile app, white label, every payment gateway, every notification channel, every commerce module). Amelia Elite adds developer-level customization across all modules.
  • Refund policy: Booknetic 14-day money-back; Amelia 15-day money-back.

The honest pricing conclusion: Amelia is the cheaper all-paid plugin at every tier and has a free entry path; Booknetic is the more bundled paid plugin at the top tier when you need most of the 50+ Boostore add-ons. The right answer depends on which side of the bundle math your add-on list lands on.

Who Should Choose Booknetic?

  • WordPress service businesses (wellness, clinics, salons, fitness, consulting, tutoring) that want a polished booking flow on their own site and a complete platform behind it
  • Multi-staff and multi-location brands that need real schedule, location, and staff modeling, not just a single calendar
  • Agencies running multiple client booking sites that want a Boostore-style add-on catalog inside the admin and white labeling on Elite
  • Operators who want a native mobile app for staff so the team can manage schedules, check-ins, and bookings on iOS and Android
  • Buyers willing to pay an annual or one-time lifetime license to avoid a SaaS scheduler subscription, and comfortable choosing the Boostore add-on mix for their tier
  • Service businesses that need broad payment gateway coverage across regional markets (Mercado Pago, Vipps, Razorpay, Mollie, 2Checkout, Netopia, plus the global standards)

If Booknetic is close but not quite the right fit, the round-up of Booknetic alternatives groups the closest WordPress booking plugins by workflow fit and pricing model.

Who Should Choose Amelia?

  • Service businesses that also run ticketed events and want one plugin to handle both — the events module with QR-coded e-tickets is the genuine differentiator
  • Buyers who want a free starting tier from WordPress.org with a clear paid upgrade path once feature caps bite
  • Teams that prioritize modern admin polish — Vue + Element Plus SPA, dark/light theme, dedicated Customize hub with live preview
  • WordPress sites already using WP Fusion or planning to connect to 50+ CRM and marketing platforms through one integration
  • Apple-ecosystem teams that need Apple Calendar two-way sync, or Microsoft-ecosystem teams that need Microsoft Teams integration
  • Buyers comfortable matching a plan tier to their integration list, with most production sites landing on Pro for Google Calendar and event tickets

If Amelia is close but not quite the right fit, the round-up of Amelia alternatives groups the closest WordPress booking plugins by workflow fit and pricing model.

Alternatives to Both

If neither plugin is a perfect fit, two alternatives are worth a serious look before you decide.

LatePoint

A modern WordPress booking plugin with a fully isolated SaaS-style admin and an all-features-in-every-paid-plan licensing model — paid tiers differ only by site count, not by feature set. A better pick than either Booknetic or Amelia when you specifically prefer one all-inclusive paid plan with no per-add-on math and you do not need the events module. See the LatePoint review for the full plan ladder.

BookingPress

A lower-priced WordPress booking plugin with a real free Lite tier (unlimited websites) and bundled add-on plans covering 60+ modules and 20+ payment gateways. A better fit than either Booknetic or Amelia when bundled add-on coverage matters more than the SaaS-style admin or the events module. See the BookingPress review for pricing detail.

For the broader picture of seven plugins tested side-by-side in this category, the cluster's best WordPress appointment booking plugins roundup is the next stop.

FAQ

Is Booknetic better than Amelia?

It depends on the use case. Booknetic is the more complete WordPress booking platform for multi-staff service businesses, multi-location brands, and agencies — it ships a dedicated SaaS-style admin, a native mobile app, and an in-panel Boostore marketplace covering 50+ paid add-ons. Amelia is the better choice if you also run ticketed events alongside appointments, you want the most polished WordPress booking admin available, or you need a free starting tier on WordPress.org. Both are credible picks; the right answer is the one whose strongest feature set matches your business model.

Which is cheaper: Booknetic or Amelia?

Amelia is generally cheaper at every paid tier and has a free Lite plugin on WordPress.org. Amelia Elite is $259/yr or $799 lifetime; Booknetic Elite is $299/yr or $899 lifetime. The trade-off is that Booknetic Elite includes all 50+ paid Boostore add-ons in the price — once you actually need most of them (mobile app, white label, broad payment gateway coverage, packages, gift cards, loyalty points, and more), Booknetic Elite is the better value per add-on.

Which is easier for beginners?

Amelia. The Setup Wizard is more guided, the Vue + Element Plus admin is responsive, and the Customize hub gives instant live-preview control over branding. Booknetic has a polished onboarding too, but General Settings and the Service modal each carry more depth than Amelia's equivalents, so the day-one learning curve is steeper.

Which is better for agencies or multiple sites?

Booknetic. Booknetic Premium ($199/yr or $599 lifetime) covers 5 domains plus 5 staging licenses with 19 paid Boostore add-ons of your choice, and Booknetic Elite ($299/yr or $899 lifetime) covers unlimited domains with all 50+ add-ons including white labeling — the natural agency tier. Amelia Pro covers 5 domains and Amelia Elite covers unlimited domains, but Amelia does not currently ship a white-label / backend rebrand.

Does Booknetic have an events module like Amelia?

Not as a built-in module today. Amelia's events module — one-time and recurring events, multiple ticket tiers (VIP / General / Early Bird), waiting lists, and QR-coded e-tickets attached to confirmation emails — is a genuine differentiator that almost no other WordPress booking plugin includes in the same product. If ticketed events are central to your business, Amelia is the more natural pick today.

Does Amelia have a mobile app like Booknetic?

No. Amelia does not currently ship a native mobile app for staff or admins — the admin is accessible via a mobile browser, but there is no dedicated iOS or Android application. Booknetic ships a native mobile app for staff and admins as part of its plans.

Final Verdict

Booknetic and Amelia are both serious WordPress appointment booking plugins, and the right pick depends on what your business actually does. For a typical multi-staff WordPress service business — wellness, clinics, salons, fitness, consulting, tutoring — Booknetic is the more complete platform: a dedicated SaaS-style admin, a real Workflow engine, an in-panel Boostore marketplace covering 50+ paid add-ons, broad payment gateway coverage, and a native mobile app for staff. For service businesses that also run ticketed events, buyers who need a free WordPress.org entry path, or teams that prioritize a modern Vue + Element Plus admin with a dedicated Customize hub, Amelia is the better fit — and its events module with QR-coded e-tickets is genuinely rare in this category. The biggest trade-off either way is honest: Booknetic loses some appeal at Basic and Standard because most high-value capabilities live in paid Boostore add-ons; Amelia loses some appeal once your integration list pushes you onto the Pro tier. If your business straddles both profiles — multi-staff appointments plus ticketed events — Amelia is still the more natural single-plugin answer today, but the cluster's best WordPress appointment booking plugins roundup is worth reading before you commit either way.