The short answer: if clients write to one shared address, use a shared inbox that tracks status (Google’s Collaborative Inbox, Front, Missive). If each account manager works from their own Gmail or Outlook, nothing built in answers the question. You need email analytics across every mailbox (Email Meter, timetoreply) or tracking inside each account manager’s inbox (alfred_).
The last two differ in who sees the answer. Analytics give a manager one dashboard of unreplied mail and reply times. alfred_ gives each account manager a list of the client threads waiting on them every morning, and it does not give the owner a team dashboard. Pick by which of those people you need to act.
Why the usual answer assumes a shared address
When we put this exact question to ChatGPT, Claude, Gemini and Perplexity on September 22, 2026, all four led with a shared mailbox or a shared-inbox tool: route client mail to one address, make everyone reply from it, then filter for threads whose last message came from a client. That works for support@. It does not describe an account team, where each client emails their account manager directly and the account manager answers from their own address. There is no shared mailbox to filter.
It is also harder than it sounds, for three reasons.
- “Nobody answered” is a negative. You are looking for a thread where the client wrote last and nothing followed, which is a question about a whole conversation, not a message.
- Read is not answered. An account manager can open a request, mean to come back to it, and still owe it a week later.
- A reply is not always an answer. timetoreply’s own homepage puts it well: a thread “looks handled because someone replied” while “the customer’s actual question is still sitting there.”
The options, same criteria
Same criteria per row, September 2026. Prices from each vendor's own pricing page. 'Who sees it' is the column most answers skip: a list only helps if the person who can act on it sees it.
| Option | Works when clients email | What it shows | Who sees it | Writes the reply | Price |
|---|---|---|---|---|---|
| Gmail or Outlook search | Any address, one mailbox at a time | Messages matching a search; it cannot test whether the client wrote last in a thread | Whoever owns or is delegated that mailbox | No | Free |
| Google Groups Collaborative Inbox | One shared group address | Conversations taken, assigned, or marked complete, duplicate or no action needed; searchable by status or assignee | Group members | No | Part of Google Workspace, with Groups for Business on |
| HubSpot list, workflow or sequence | Email that reaches HubSpot contacts | Contacts whose last reply is newer than your last contact with them, built from two contact properties; per contact, not per thread | CRM users | No | Automatic notifications need workflows on a Professional plan |
| Shared inbox apps (Front, Missive) | A shared address, or individual inboxes moved into the app | Open conversations by assignee and status; Missive rules send reminders when messages go unreplied | The team | Front's AI Copilot add-on drafts replies | Front Starter $25/seat/mo billed annually; Missive from $14/user/mo, rules from $24 |
| Email Meter | Individual and shared Gmail or Microsoft mailboxes | Unreplied mail and its age, response rate and median response time, by mailbox and by person; headers only | Managers | No | Free tier; Plus $15 to $19/user/mo, up to 15 mailboxes |
| timetoreply | Individual and shared Outlook or Google Workspace mailboxes | Reply times against SLA targets with alerts; on +Intelligence, stalled threads, urgency and sentiment | Managers, plus timers inside each person's inbox | No; it never sends automated responses | From $34/mailbox/mo billed annually, 15-mailbox minimum |
| alfred_ | Each account manager's own Gmail or Outlook | The client threads waiting on that account manager, and the ones waiting on the client | That account manager, each morning; a coordinator can open teammates' inboxes with their permission | A coordinator can draft replies into the account manager's Drafts | $34.99/seat/mo, two-seat minimum |
Choose a Collaborative Inbox if clients already write to one group address and you want the free version. Choose Front or Missive if you want assignment, status and reminders on a shared address, or your account managers will move their own email into the app. Choose the HubSpot workaround if every account manager’s email already reaches HubSpot and a per-contact list is enough. Choose Email Meter if you want a manager’s view of unreplied mail and reply times with a free tier to start. Choose timetoreply if you run 15 or more client-facing mailboxes and want SLA alerts plus conversation-level signals like stalled threads. Choose alfred_ if you want each account manager to see what is waiting on them before anyone has to ask, in the Gmail or Outlook they already use.
Native Gmail and Outlook: fine for one mailbox
In your own Gmail, search operators get you partway. A search like from:clientdomain.com older_than:2d newer_than:30d lists client mail from the last month that is at least two days old. What it cannot do is tell you whether anyone answered. Search matches messages, and a conversation shows up if any message in it matches, so a thread you answered yesterday is still in the results. There is no operator for “the client wrote last”. Outlook’s search and filters have the same limit.
Search also covers only the mailbox you can open. A manager can search an account manager’s mailbox as a delegate: in Google Workspace, a delegate can read, send and delete mail in the account, if the admin has delegation turned on; in Microsoft 365, an admin can grant Read and manage (Full Access) permission, which does not include Send as. That is one mailbox at a time, by hand.
For a shared group address, Google’s Collaborative Inbox does track this: members can take a conversation, assign it to someone else, mark it complete, duplicate or no action needed, and search by resolution status or assignee. It needs everyone to work the group address, which account managers usually do not.
HubSpot: the community answer is a workaround
If your account managers log email to HubSpot, you might expect a report of client emails nobody answered. The accepted answers in HubSpot’s own Community forum describe workarounds instead.
- In a 2021 thread asking for an automatic reminder when an inbound customer email has not been answered within 24 hours, the accepted answer says a notification needs workflows on a Professional subscription (Marketing Hub or Sales Hub Professional). On Starter, it suggests an active list of contacts whose “Recent sales email replied date” is after “Last contacted”, and recommends testing whether replies sent from Outlook with BCC are picked up.
- In a 2023 thread asking for a workflow that flags email that has not been replied to, the accepted answer recommends a sequence, and says a workflow built on “Last contacted” and “Recent sales email replied date” would be “more fiddly and not 100% correct”, because calls and meetings also update “Last contacted.” Beyond that, “it currently doesn’t get better than this” without Operations Hub Professional and custom code.
Two things follow. The workaround works per contact, not per thread, so a client with three open requests shows up once. And it only sees email that reaches HubSpot. These are forum answers from 2021 and 2023, so check your own portal before you build on them.
Email analytics: the manager’s view
Email Meter and timetoreply are built for this question when a manager is the one asking. Both connect to individual and shared mailboxes without changing how anyone sends mail, which matters for account teams.
Email Meter reads headers only, never bodies. Its unreplied emails view counts what went unanswered, how old it is and which mailbox it sits in, and its team view shows received, sent and replied mail, median response time and response rate per person. There is a free tier; Plus is $15 to $19 per user per month and covers up to 15 mailboxes.
timetoreply measures reply times against the SLA targets you set, puts countdown timers inside each person’s Outlook or Gmail, and on its +Intelligence tier reads conversations for sentiment, urgency and stalled threads. It names insurance, logistics, legal and professional services among the teams it serves. Pricing starts at $34 per mailbox per month billed annually with a 15-mailbox minimum, so at least $510 a month.
The honest limit of both is that they measure. Somebody still has to answer, and timetoreply says outright that it “never sends automated responses to your customers.” If what you want is one screen for the owner showing every account manager’s unreplied client mail and reply times, this is the category to buy from, and alfred_ is not the pick.
Shared inbox apps
Front and Missive give a team assignment, status and reminders on unreplied mail, and both can take individual inboxes if account managers move their email into the app: Front’s pricing page lists an individual inbox that brings your own email into Front, and Missive’s rules can send “reminders when messages go unreplied.” The condition is that the team works inside the app. Our shared inbox comparison covers the category.
Per-person tracking: fix it where the reply gets written
For an account team, the question “which client emails has nobody answered” is really each account manager’s question “which client threads are waiting on me”. That list is easiest to keep accurate from inside the inbox, because the inbox knows who wrote last.
This is how alfred_ works. Every account manager gets their own alfred_, in the Gmail or Outlook they already use, with no shared address and no migration. It tracks which client threads are waiting on them and which are waiting on the client, and tells them each morning. The mechanics are in Follow-up tracking; the one-person version of the same problem, sent mail nobody answered, is covered in which tool tracks emails you’re still waiting on.
For the owner or coordinator, alfred_ adds shared access, set up with us for teams on the Team plan ($34.99 per seat per month, two-seat minimum). With each teammate’s permission, a coordinator can work their inboxes and calendars from one place, without marking their mail read, and draft replies into their Drafts. Each teammate sees who looked.
What it does not do: there is no team-wide list of unanswered client email. The owner does not get a dashboard, and the coordinator works one teammate’s inbox at a time. If the dashboard is the requirement, buy analytics.
A dashboard tells a manager which inbox has a problem. A morning list tells the account manager which client is waiting. Most teams that ask this question need the second and buy the first.
alfred_ is the pick when the account managers need to act:
Pros
- Account managers answer clients from their own Gmail or Outlook, not a shared address
- You want each account manager to see which client threads are waiting on them every morning
- A coordinator needs to step into a teammate's inbox with permission, without marking mail read, and draft into their Drafts
- No migration: nobody changes the email client they use
Cons
- No team-wide dashboard or unreplied counts for the owner
- The coordinator setup is done with us, not self-serve
- Does not read HubSpot or Salesforce; it logs outbound mail by BCC
Not the pick when:
Pick something else if
- The owner wants one dashboard of unreplied mail and reply times across every mailbox (Email Meter, timetoreply)
- You run 15 or more client mailboxes and want SLA alerts and stalled-thread detection (timetoreply)
- Clients write to one shared address and the team will work in one app (Front, Missive, Collaborative Inbox)
- Every email already reaches HubSpot and a per-contact list is enough (HubSpot list or workflow)
What that option gives up
- Email analytics: it measures replies; nobody drafts the answer
- timetoreply: $510 a month minimum on annual billing
- Shared inbox apps: mail answered from personal Outlook or Gmail is outside them
- HubSpot workaround: per contact, not per thread; the workflow version is 'not 100% correct' by the forum's accepted answer
A weekly check you can run with no new tools
- Each account manager searches their own inbox for client mail from the last 30 days that is more than two days old, and opens each thread where the client wrote last.
- Anything owed gets a date, written back to the client, not just noted.
- The coordinator samples, with delegated access where it exists: five client threads per account manager, chosen at random.
- Count the misses. If the sample keeps finding client emails nobody answered, the manual check is not enough, and it is time for one of the tools above.
If the unanswered client email in question is yours, not your team’s, start with dropping the ball on client emails.
Our Verdict
Decide who needs the list, then pick the tool.
For a shared address, a shared inbox with status answers the question directly, and Google's Collaborative Inbox does it for free. For account managers on their own Gmail or Outlook, native search cannot see across mailboxes and HubSpot's own community describes workarounds. Email Meter and timetoreply give a manager a dashboard of unreplied mail and reply times across every mailbox, and are the right buy if that dashboard is the goal. alfred_ puts the list where the reply gets written: each account manager's own alfred_ tracks which client threads are waiting on them and tells them each morning, and a coordinator can step into teammates' inboxes with their permission.
Best for
- alfred_ for account managers on their own inboxes who need their own list of what is waiting on them
- Email Meter or timetoreply for an owner's dashboard of unreplied mail and reply times
- Front, Missive or a Collaborative Inbox for a team that works one shared address
Not for
- alfred_ if the requirement is a single team-wide dashboard
- Email analytics if you need the replies written, not counted
- A shared inbox if account managers will keep answering from their own address