Relay

Relay

Martello Systems
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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.

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.

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

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

Audience

Appointment businesses, startups, and tech companies that handle customer messages and booking.

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.

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Supported

API

Offers API Not Supported

Screenshots and Videos

Screenshots and Videos

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

Pricing

$0
Free Version Supported
Free Trial Not Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Supported
In Person Not Supported

Company Information

Martello Systems
Founded: 2026
United States
relaycustomerops.com

Company Information

Seamless Slot
Founded: 2024
United Kingdom
seamlessslot.com

Alternatives

Alternatives

BarbrFlow

BarbrFlow

Core Haven Labs
BarbrFlow

BarbrFlow

Core Haven Labs
SMS Reminder

SMS Reminder

CK Digital
Clienteka

Clienteka

PLWebsites
Stippa

Stippa

De Rechter Software
ClicAs

ClicAs

Grupo Clic

Categories

Categories

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

Integrations

Google Calendar Supported
Google Tag Manager Not Supported
Instagram Supported
Mycel Supported
Stripe Not Supported

Integrations

Google Calendar Supported
Google Tag Manager Supported
Instagram Not Supported
Mycel Not Supported
Stripe Supported
Claim Relay and update features and information
Claim Relay and update features and information
Claim Seamless Slot and update features and information
Claim Seamless Slot and update features and information