RelayMartello Systems
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Related Products
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About
Relay is customer messaging and appointment-operations software for salons, barbers, lash and brow studios, med spas, tattoo studios, pet groomers and other appointment businesses. It brings texts, email, calls, web chat, form inquiries, and connected Facebook and Instagram messages into a shared customer inbox. Businesses can publish booking links, sync calendars with Google Calendar, check availability for conflicts, send appointment reminders, prompt clients to rebook, and notify waitlisted customers when a slot opens. Automated workflows can text back missed callers and follow up with leads. Relay's AI can draft replies for staff approval or send automatic replies, depending on settings. The optional AI Front Desk answers calls and books appointments. The service also includes contact records, forms, pipelines, and API access on qualifying paid plans. Relay is web-based and connects to Martello's stack, including Mycel, its shared business knowledge layer.
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About
Seamless Slot is an online appointment booking platform for salons, barbers, spas, dental practices, clinics, and other service businesses. Instead of a monthly subscription, it charges 3% per confirmed paid booking, so businesses only pay when they actually earn.
The platform brings scheduling, payments, and client communication into one dashboard. Businesses accept bookings directly from their website, collect deposits through Stripe or Square, and reduce no-shows with automated SMS and email reminders.
Key features include drag-and-drop calendar scheduling, team calendars with role-based access, multi-location support, unlimited staff accounts, Google Calendar and Microsoft Outlook sync, customisable email and SMS templates, analytics dashboard, and GDPR-compliant data handling.
Free to start, no contracts, no setup fees, and no credit card required. Used by service businesses in the UK and 85+ other countries.
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Platforms Supported
Windows
Not Supported
Mac
Not Supported
Linux
Not Supported
Cloud
Supported
On-Premises
Not Supported
iPhone
Not Supported
iPad
Not Supported
Android
Not Supported
Chromebook
Not Supported
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Platforms Supported
Windows
Not Supported
Mac
Not Supported
Linux
Not Supported
Cloud
Supported
On-Premises
Not Supported
iPhone
Not Supported
iPad
Not Supported
Android
Not Supported
Chromebook
Not Supported
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Audience
Appointment businesses, startups, and tech companies that handle customer messages and booking.
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Audience
Seamless Slot is designed for service-based entrepreneurs, small-to-medium businesses (SMBs), and multi-staff organizations looking for a risk-free management solution. Our primary audience includes the health and beauty sector (salons, barbers, spas), fitness professionals (personal trainers, boutique studios), and professional consultants. It is ideal for cost-conscious founders who require enterprise-level features—such as unlimited staff profiles and automated SMS reminders—without the burden of fixed monthly subscription fees. Any industry reliant on appointment-based scheduling and client relationship management will benefit from our success-based, pay-as-you-go model.
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Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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Support
Phone Support
Supported
24/7 Live Support
Not Supported
Online
Supported
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API
Offers API
Supported
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API
Offers API
Not Supported
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Screenshots and Videos |
Screenshots and Videos |
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Pricing
$49/month
A free plan is available. Paid plans start at $49/month or $539/year; annual billing includes one month free. Plans include different contact, seat, messaging, and AI allowances. Extra seats, usage beyond included allowances, and optional modules may cost extra.
Free Version
Supported
Free Trial
Not Supported
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Pricing
$0
Free Version
Supported
Free Trial
Not Supported
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Reviews/
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Reviews/
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Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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Training
Documentation
Supported
Webinars
Not Supported
Live Online
Supported
In Person
Not Supported
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Company InformationMartello Systems
Founded: 2026
United States
relaycustomerops.com
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Company InformationSeamless Slot
Founded: 2024
United Kingdom
seamlessslot.com
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Alternatives |
Alternatives |
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Categories |
Categories |
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Appointment Scheduling Features
Appointment Reminders
Supported
Automated Scheduling
Supported
Calendar Sync
Supported
Client Database
Supported
Group Scheduling
Supported
Mobile Access
Supported
Multi-Location
Supported
Online Booking
Supported
Online Payments
Supported
Recurring Appointments
Supported
Room Booking Management
Supported
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Integrations
Google Calendar
Supported
Google Tag Manager
Not Supported
Instagram
Supported
Mycel
Supported
Stripe
Not Supported
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Integrations
Google Calendar
Supported
Google Tag Manager
Supported
Instagram
Not Supported
Mycel
Not Supported
Stripe
Supported
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