Client Follow-Up Reminder

Product Sales & Client Success

Client Follow-Up Reminder

Turn Google Sheets client records into timely, personalized follow-up emails, with daily n8n checks and automatic sent-status tracking.

Founding seller Added 2026-10-12
👁 2 Works with Sales & Client Success Self-hosted stack

Includes 1 item · 14-day refund if it doesn't work as described

Price $19.00 one-time · then $0.16/mo in services you run yourself
Update policy: Updates included
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Production readiness

Starter

0 of 5 production pillars met

  • Compatibility tested
  • Evaluated
  • Security screened
  • Tools & integrations
  • Memory & state
  • Per-run observability coming soon
Self-hosted automation stack

What you run, and what it costs you

n8n checks client follow-up dates in Google Sheets, uses OpenAI GPT-4.1 mini to draft English reminders, validates each message, sends it through Gmail and updates the matching client status after Gmail returns a message ID.

Self-hosted Runtime: n8n needs 4 services · ~$0.16/mo
01

Services you bring

Accounts you sign up for, billed by them — not by Sigrix.
n8n Schedules the daily run and coordinates all service calls. Existing instance assumed. Hosting extra; Cloud Starter EUR 20/month billed annually. Sign up ↗
Google Sheets Stores the client register and reminder status. Existing eligible Google account assumed; paid workspace plans optional. Sign up ↗
OpenAI Generates personalized English reminders with GPT-4.1 mini. Usage-based; example $0.16/month for 200 reminders under the stated assumptions. Sign up ↗
Gmail Sends the reminders from the buyer's account. Existing eligible Gmail account within sending limits; paid Workspace optional. Sign up ↗
02

Credentials you provide

BYO — never embedded

No secrets ship inside the download. The package arrives with empty credential slots. You paste your own keys into your own n8n; nothing you enter is transmitted to Sigrix or to the seller.

  • Google Sheets OAuth credential for Google Sheets Reads client rows and updates the matching reminder status. You supply
  • OPENAI_API_KEY for OpenAI Authorizes GPT-4.1 mini reminder generation. You supply
  • Gmail OAuth credential for Gmail Authorizes sending from the buyer's account. You supply
03

How it connects

4 connections across 3 stages
01 Trigger
Daily at 09:00 Schedule
02 Run
Business Settings Set fields Read Clients Google Sheets Select Due Clients Code Loop Clients Loop Draft Reminder AI step usesOpenAI chat model
03 Run 2
Validate Reminder Code Send Reminder Gmail Prepare Sent Update Code Update Client Status Google Sheets
See it as a connection list
  1. 01n8n → Google Sheets (Google Sheets API read of the Clients worksheet)
  2. 02n8n → Gmail (Gmail API send of a validated plain-text reminder)
  3. 03n8n → OpenAI (GPT-4.1 mini text generation through the OpenAI Chat Model node)
  4. 04n8n → Google Sheets (Update matching email row after Gmail returns a message ID)
04

Recurring cost

Charged monthly by the services above
Estimated running cost $0.16/mo You pay this to the services above, every month, for as long as the automation runs — it is not part of the listing price.
Breakdown
  • OpenAI GPT-4.1 mini input (200,000 tokens x $0.40 per million) $0.08/mo
  • OpenAI GPT-4.1 mini output (50,000 tokens x $1.60 per million) $0.08/mo
  • Google Sheets (Existing eligible account; paid plans excluded) $0/mo
  • Gmail (Existing eligible account within sending limits) $0/mo
  • n8n existing instance (New hosting or Cloud subscription excluded) $0/mo
Assumes
  • 200 successful reminders per month
  • OpenAI GPT-4.1 mini standard API model
  • Average 1000 billed input tokens per reminder
  • Budgeted 250 output tokens per reminder
  • No retries or additional generation attempts included
  • Existing n8n instance; new hosting and subscriptions excluded
  • Existing eligible Google Sheets and Gmail accounts within their limits
  • No paid Google Workspace subscription included
  • Taxes and currency conversion excluded
  • Prices checked on 12 October 2026; actual usage and rates may change
What you get

Everything in the package

Includes 1 item
  • n8n workflow, client-register XLSX, personalized Gmail reminders, sent-status tracking in Google Sheets, setup guide, editable code and offline test files.
Overview

What this does

Keep follow-ups moving without checking a client spreadsheet every morning. Client Follow-Up Reminder connects your Google Sheets register, OpenAI and Gmail in an editable n8n workflow. It checks service follow-up dates daily, drafts a short English message, adds your booking contact and company signature, and records successful sends against the correct client row. The default window covers clients due within seven days and those up to fourteen days overdue. You can adjust the timing and each client's follow-up interval. A sent-status flag skips previously contacted clients until you reset the record after a new visit. Built-in checks reject invalid dates, duplicate email keys and overlong messages. Clients are processed one at a time, and status updates follow Gmail confirmation. The package includes an English spreadsheet, setup guide, editable workflow and offline validation files. Designed for service businesses and small operations teams managing repeat visits, maintenance checks or routine service reviews. Buyer-owned accounts and configuration are required. This is a workflow template; subscriptions, API usage and setup services are separate. Complete a controlled live test before activation. It does not book appointments or guarantee delivery, bookings or revenue.

About this listing

Frequently asked questions

Answered by the seller, about this listing specifically.

  • What does Client Follow-Up Reminder do?

    Keep follow-ups moving without checking a client spreadsheet every morning. Client Follow-Up Reminder connects your Google Sheets register, OpenAI and Gmail in an editable n8n workflow. It checks service follow-up dates daily, drafts a short English message, adds your booking contact and company signature, and records successful sends against the correct client row. The default window covers clients due within seven days and those up to fourteen days overdue. You can adjust the timing and each client's follow-up interval. A sent-status flag skips previously contacted clients until you reset the record after a new visit. Built-in checks reject invalid dates, duplicate email keys and overlong messages. Clients are processed one at a time, and status updates follow Gmail confirmation. The package includes an English spreadsheet, setup guide, editable workflow and offline validation files. Designed for service businesses and small operations teams managing repeat visits, maintenance checks or routine service reviews. Buyer-owned accounts and configuration are required. This is a workflow template; subscriptions, API usage and setup services are separate. Complete a controlled live test before activation. It does not book appointments or guarantee delivery, bookings or revenue.

  • Who is Client Follow-Up Reminder best for?

    Client Follow-Up Reminder is built for sales & client success use cases and is particularly useful for n8n, Google Sheets, Gmail, client retention, and reminders.

  • What do I get with Client Follow-Up Reminder?

    n8n workflow, client-register XLSX, personalized Gmail reminders, sent-status tracking in Google Sheets, setup guide, editable code and offline test files.

  • How much does Client Follow-Up Reminder cost?

    Client Follow-Up Reminder is priced at $19.00 on Sigrix.

  • Can I customize Client Follow-Up Reminder after I get it?

    Yes — once you own Client Follow-Up Reminder on Sigrix the deliverables are yours to adapt to your own data and workflow rather than starting from scratch.

Buying on Sigrix The same for every listing, so you only have to read it once.
How do I use this product?
Open the Instructions tab and follow the setup guide with your own accounts. Everything runs on your infrastructure — Sigrix never executes it for you.
What do I get after purchase?
Immediate access to every file in the package, the full setup guide, and free updates to this listing for as long as you own it.
Where can I find support references?
Support comes from the seller; their profile lists how to reach them. Your certificate and product identifiers are in the Ownership tab, and Sigrix mediates refund requests within 14 days.