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Coachstack VS InboxAgent

Compare Coachstack VS InboxAgent and see what are their differences

Coachstack

Programs, workout logging and session prep for personal trainers. Clients log every set from their phone, even offline, and before each session you see how the last one went. Free during the beta.

Rating
0 reviews
Pricing
Free
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Alternatives Is it good?
InboxAgent

InboxAgent uses AI to read your shared mailboxes, like info@ and sales@, plus everyone's own inbox, on Microsoft 365, Gmail, Zoho Mail or IMAP. It finds the sales leads and gives each an owner on a board. Never sends from your mailbox.

Rating
5.0 · 1 review
Pricing
Paid Free trial $20 / Monthly
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DisplaySwitcher
Switch your monitor’s video input and seamlessly transfer text and files! A Linux/macOS/Windows Desktop Application. sponsored
Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Which is more popular?

Fitness popularity
100% vs 0%
alternatives listed
8 vs 30

Base details

Website, pricing, platforms and company facts side by side.

Coachstack
InboxAgent
Website coachstack.pro goinboxagent.com
Pricing
Free Official pricing
Paid Free trial $20 / Monthly Official pricing
Platforms
iPhone Android Web iPad +1
GMail M365 Zoho Hubspot +1
Listed in
Personal Trainer Software Fitness Workout Health And Fitness Personal Trainer Gym And Fitness Studio Management Coaching Fitness Tracker Appointments and Scheduling +6
Email Productivity Team Inbox Lead Management Small Business CRM Productivity Sales Email Management Leads +5

About Coachstack and InboxAgent

In their own words, as submitted to SaaSHub.

Coachstack
InboxAgent

Coachstack is built for personal trainers who coach in person and online. Import your programs and clients from Excel or CSV. Clients log their sets from the phone's browser, with nothing to install and no signal needed. You can log on the same session from your own phone. Before every...

Read more about Coachstack

Leads arrive at info@, at sales@, and in each salesperson's own inbox, mixed in with client questions, invoices and noise. On a busy day some are never answered, and you are the one answerable when a real lead goes quiet. InboxAgent watches the mailboxes you already have, on Microsoft 365,...

Read more about InboxAgent

Features and specs

What each product offers, as listed by its team.

Coachstack 11 features
InboxAgent 11 features
  • Session brief
    One page before each session: last session, pain, messages and today's plan next to last time
  • Progression proposals
    Load increases calculated from the logged sets, with their reasons. Nothing changes until the coach approves
  • Pain reports
    Clients report pain during a session. No increase is proposed on that exercise until the coach has read it
  • Offline workout logging
    Clients log every set from the phone's browser, also without signal. It syncs when the connection returns
  • Coach on the same session
    The coach can log the client's session from their own phone or tablet while the client trains
  • Program builder
    Weeks, days, sets, reps, load, RIR and rest, with supersets and circuits. Published versions stay unchanged
  • Import from Excel or CSV
    Programs and clients come in from an .xlsx file, a CSV or a paste
  • Goals
    A target on a lift with a date, and whether the client is ahead of pace
  • Calendar
    Day, week, month and agenda views. Clients can request a session and the coach confirms it
  • Check-ins and messages
    Recurring check-ins the client fills in, and one-to-one chat with the coach
  • Platforms and languages
    Computer, tablet and phone browser, nothing to install. English and Italian, light and dark
  • Triage-based inbox system
    Every email is sorted into one of three things: a sales lead, something else that needs a person, or noise. Leads land on a Leads board and everything else on Follow-ups, each with an owner and a stage. Read-only throughout, nothing is moved.
  • AI Classification
    AI works out what each email is once the rules have cleared the obvious noise. Anything it is not confident about is marked Needs review and waits for a person. Your team's corrections stick and become rules and sender signals you can see.
  • Pricing Model
    $20 a month for your whole organization, including the first mailbox. $5 for each additional mailbox. Users are free, no per-seat charge and no overage. 7-day free trial.
  • Noise Filtering
    Newsletters, bulk mail, known marketing senders and auto-replies are caught by rules you control and set aside before the AI is ever called. Every decision is recorded so you can see what was filtered and why.
  • Gmail Integration
    Reads Gmail and Google Workspace mailboxes, shared and individual, read-only and Google-verified. Each person authorizes their own. Nothing is moved and your team keeps working in Gmail.
  • Outlook Integration
    Reads Microsoft 365 mailboxes, including shared mailboxes like info@ and sales@, read-only. Each person authorizes their own. Nothing is moved and your team keeps working in Outlook.
  • zoho crm
    Sales inquiries become leads in your Zoho CRM as they arrive, matched to an existing record where there is one rather than creating a duplicate. Zoho Desk is supported alongside it for service requests.
  • HubSpot Integration
    Sales inquiries flow into HubSpot as contacts and deals, matched against existing records. Works on HubSpot's free tier, so there is nothing extra to buy.
  • IMAP Support
    Connects to any standard IMAP mailbox, not just the major providers. Read-only, with the same Leads and Follow-ups boards as everywhere else. Four mailbox types in total: Microsoft 365, Gmail, Zoho Mail and IMAP.
  • Follow-up Automation
    Anything that needs a person and is not a sales lead is detected and placed on the Follow-ups board with an owner, and stays open until it is marked done. Invoices, renewals, contracts, supplier requests, legal notices. The automation is in the finding and the routing. InboxAgent never sends email on your behalf.
  • Read-Only Access
    Read-only access to every connected mailbox. InboxAgent does not move, migrate, archive or delete anything. Two-factor authentication, role-based per-mailbox access, CASA security assessment completed.

Videos

Walkthroughs and reviews on video.

Coachstack 0 videos + Add
InboxAgent 1 video + Add

No Coachstack videos yet. You could help us improve this page by suggesting one.

InboxAgent: never miss a lead in your business inbox

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
Coachstack
InboxAgent
100% 100%
Fitness
0% 0%
0% 0%
Productivity
100% 100%
100% 100%
Workout
0% 0%
0% 0%
Sales
100% 100%

Questions & Answers

As answered by people managing Coachstack and InboxAgent.

What makes your product unique?

Coachstack's answer

Coachstack is built around the decision a coach makes before each session. One page shows how the last session went: sets done, pain reported, messages waiting, and the session planned for today next to what the client lifted last time. Load increases are calculated from the logged sets and arrive as proposals with their reasons; nothing changes the programme until the coach approves. If a client reports pain on an exercise, no increase is proposed on it until the coach has read the report.

InboxAgent's answer:

It is read-only. InboxAgent reads the mailboxes you already have and never sends mail from them, never moves a message, and never files or deletes anything. Most tools in this category work by forwarding your mail into their own system, after which your own mailbox stops being the record of what arrived. Nothing here changes your mailbox.

For Microsoft 365, Gmail and Zoho Mail that is enforced by those providers rather than promised by us. The permissions we request are read-only, so you can check it on the consent screen before you click Allow.

Why should a person choose your product over its competitors?

Coachstack's answer

Because it keeps the training record and the coaching decision in one place. Clients log every set from the phone's browser, with nothing to install, and the logger keeps working without signal. The coach can log on the same session from their own phone or tablet. Programmes and clients come in from Excel or CSV, so there is no starting from zero. It is free during the beta, in English and Italian.

InboxAgent's answer:

  • Nothing to migrate and no new app for your team to adopt. They keep working in Outlook or Gmail exactly as before.
  • Priced per organization, not per seat. $20 a month including your first mailbox, $5 for each additional mailbox, unlimited users.
  • It covers shared addresses like info@ and sales@ as well as everyone's own inbox, on Microsoft 365, Gmail, Zoho Mail or any IMAP mailbox.
  • A salesperson can act on a lead without being given the mailbox, which usually also holds bank correspondence and password resets.
  • It works with or without a CRM. If you use Zoho CRM, Zoho Desk or HubSpot, leads flow there as well.

How would you describe the primary audience of your product?

Coachstack's answer

Personal trainers who coach both in person and online: independent coaches and small studios run by one coach, with clients who train in the gym with them and on their own between sessions.

InboxAgent's answer:

Businesses whose sales inquiries arrive by email, at shared addresses like info@ and sales@ as well as in individual inboxes. Typically service businesses that sell by email: agencies, professional services, trades and field service, suppliers and distributors.

It fits particularly well where email is the main source of leads and there is no proper place to manage them. Every lead lands on a board with an owner and the original email attached, moves through stages you name yourself, carries up to ten fields of your own, and can be exported to CSV at any time.

What's the story behind your product?

Coachstack's answer

Many personal trainers still run their business on spreadsheets, paper notes and chat messages: the programme lives in one file, the client's sets in another, and the reason a load was changed lives nowhere. Coachstack was built in Italy to put those pieces together, so that every session is recorded once and the next one starts from what happened in the last.

InboxAgent's answer:

Sales inquiries arrive in the same mailbox as invoices, supplier mail and noise. Everyone can see them and nobody owns them, so on a busy day some are never answered, and the business often finds out only when a customer goes elsewhere.

InboxAgent exists to answer one question about that mailbox: who owns this email, and has anyone actually dealt with it.

Which are the primary technologies used for building your product?

Coachstack's answer

Next.js and React with TypeScript, Supabase (PostgreSQL with row-level security), Tailwind CSS, hosted on Vercel.

InboxAgent's answer:

.NET on Microsoft Azure App Service. Microsoft Graph, the Gmail API, the Zoho Mail API and IMAP for mailbox access, all with read-only permissions. OpenAI for classification.

User comments

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Reviews and articles

External articles and on-site reviews we used to compare the two products.

Coachstack no reviews yet
InboxAgent 5.0 · 1 review

We have no reviews of Coachstack yet. Be the first one to post

  • Sales leads sorted
    SaaSHub review
    · Sep 2026

    My emails are organized now. I dont have to scroll through emails. nice delegate agent I would say.

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