Best Shared Inbox Software for Gmail and Outlook in 2026

Most comparisons of shared inbox software have a curious feature in common: they do not cite a single source. They assert that shared mailboxes "break down at scale" without telling you where that number comes from, they blend help desks in with shared inboxes as if they were the same purchase, and the vendor who wrote the article always finishes first.

This one is sourced. Where a limit exists, we cite Microsoft's or Google's own documentation. Where a tool has a real weakness, we name it.

Disclosure: we make InboxPilot. It is not the top pick here, and more importantly it is not a shared inbox tool at all. It appears at the end, in its own category, because pretending it competes with Front on assignment and collision detection would be dishonest and you would notice. Our top pick is Front.

TL;DR

• Best overall: Front. The most complete shared inbox, with the pricing to match.
• Best for Gmail teams: Hiver. Lives inside Gmail, free tier, near-zero onboarding.
• Best for collaboration: Missive. Real-time co-drafting and chat in the thread, from $14 per user.
• Best for support teams: Help Scout. Shared inbox plus knowledge base, free for 5 users.
• Best free option, Google: Google's new native shared inbox. Free, in real Gmail, and almost nobody knows it exists.
• Best free option, Microsoft: the M365 shared mailbox. Free, native in Outlook, with documented ceilings.
• Cheapest Gmail-native paid option: Gmelius at $19, if nobody on your team uses Outlook.

Start here: which of the three are you actually buying?

Almost every bad purchase in this category comes from confusing three different products.

Work out which class you are in before you compare a single feature. A three-person team does not need Zendesk. A 30-agent org cannot run on a Google Group.

The free options first, because you may not need to buy anything

Every listicle in this category skips straight to the paid tools. Two free options are worth ruling out first, and one of them is new enough that the competing articles have not noticed it.

Google's native shared inbox is new, free, and undocumented in every comparison we found

Google Workspace admins can now create a shared email address directly from the Admin console (Users, then "Set up a shared email address"). Unlike the old Collaborative Inbox, it lives in real Gmail, not the Google Groups web interface. It is included on Business Starter, Standard, and Plus with no paid add-on. (Google Workspace admin docs)

It gives you access and sending from the shared address. It gives you no collision detection, no automation, and no SLA reporting. It solves access, not coordination. But if your problem is "three of us need to see support@," it is free and it is enough.

Microsoft tells you exactly where its shared mailbox breaks

This is the best-sourced fact in this entire post, and it comes from Microsoft's own admin documentation:

"A shared mailbox supports a maximum of 25 users. If too many users access the mailbox at the same time, they might experience connection failures or duplicated messages." (Microsoft Learn, About shared mailboxes)

Duplicated messages. Two agents answering the same customer. That is the platform vendor naming the failure mode in its own docs, which is considerably more persuasive than a shared inbox company telling you that shared mailboxes are bad.

The other documented M365 limits are worth knowing before you rely on one:

• 50 GB cap without an Exchange Online Plan 2 license. On hitting it, the mailbox stops sending, then stops receiving.
• No encryption. Mail from a shared mailbox cannot be encrypted, because the mailbox has no security context of its own.
• You cannot prevent users from deleting messages.
• No external access. A contractor on an outside domain cannot be given access.

Gmail has a concurrency ceiling too

Google's native shared inbox is built on Gmail delegation, and delegation has documented limits: up to 1,000 delegates on paper, but only around 40 can access the account simultaneously under typical use, and Google notes that "above-average use by one or more delegates might reduce this number." Browser extensions and APIs that poll Gmail frequently reduce it further. (Google Workspace admin docs)

That last detail is worth sitting with, because Hiver and Gmelius are both Gmail extensions.

The honest summary: a plain shared mailbox is genuinely fine at two or three people and low volume. The vendor-documented ceilings are 25 users (Microsoft) and roughly 40 concurrent delegates (Google). But the real breaking point arrives much earlier, the first time two people reply to the same customer and neither knows it happened.

The comparison table

Pricing verified against vendor pricing pages in July 2026.

The best shared inbox tools, ranked

1. Front

Best for: Mid-market and larger teams that want shared inbox ergonomics with serious integrations, analytics, and omnichannel.

Front is the most complete product in this category, and it takes the top spot ahead of our own tool because for most teams asking this question, it is simply the right answer.

Strengths

• Mature collision detection and assignment, the two things you are actually buying.
• Deep integration catalog including Salesforce and HubSpot.
• Strong analytics, genuinely better than the rest of this list.
• Omnichannel on Professional and above.

Tradeoffs

• The advertised price is not the real price. Starter at $25 per seat is limited to a single channel type. The plan most teams actually need is Professional at $65 per seat per month, and Enterprise is $105.
• Outlook sync is conditional, and Front documents this itself. Read status syncs only for personal channels, and for shared conversations only once the assignee reads it. In-place archive mailboxes do not sync at all. Mixed Front and Outlook teams get confused by this. (Front help docs)
• AI is an add-on: Copilot at $20 per seat per month, Autopilot from $0.05 per conversation.

Pricing: Starter $25 per seat per month annual (up to 10 seats), Professional $65, Enterprise $105. No free tier, 14-day trial. (front.com/pricing)

Full head-to-head: InboxPilot vs Front.

2. Hiver

Best for: Google Workspace teams who will not leave Gmail, and should not have to.

Strengths

• Genuinely native to Gmail, running as a sidebar. Onboarding is close to zero because there is no new app to learn.
• Free forever tier that includes a shared inbox, which is rare.
• Collision detection, assignment, and SLA basics.
• Clean pricing ladder with no surprises: Free, $25, $55, $85.

Tradeoffs

• Performance is the recurring complaint. Reviewers on G2 and Capterra consistently report slow loading under volume and needing to refresh the browser to bring Hiver back.
• Outlook is not supported in the Gmail product. Microsoft teams have to use Hiver Omni, which is a separate standalone app, not an Outlook add-in.
• Analytics are thinner than a full help desk.

Pricing: Free forever. Growth $25 per user per month annual ($35 monthly), Pro $55, Elite $85. (hiverhq.com/pricing)

Also see: Hiver vs InboxPilot.

3. Missive

Best for: Teams that want to discuss and co-write replies inside the thread instead of copying them into Slack.

Strengths

• Cheapest serious entry point at $14 per user per month.
• Real-time collaborative drafting is genuinely differentiated. Two people can write one reply together, live.
• Broad channel support: Gmail, Outlook, IMAP, WhatsApp, Messenger, Instagram, SMS via Twilio.
• Provider-agnostic, so it does not care whether you are on Google or Microsoft.

Tradeoffs

• Starter caps at 5 users. The realistic plan for a growing team is Productive at $24.
• The learning curve is the dominant reviewer complaint. It is a genuinely new paradigm, and teams coming from plain Gmail need a few weeks to settle in.
• Occasional duplicate-thread and snooze confusion reported by reviewers.

Pricing: Starter $14 per user per month (up to 5 users), Productive $24 (up to 50), Business $36 (unlimited). A free plan is referenced but its limits are not published, so confirm before relying on it. (missiveapp.com/pricing)

Also see: Missive vs InboxPilot.

4. Help Scout

Best for: Customer support teams that want a shared inbox plus a knowledge base, without Zendesk's weight.

Strengths

• Free tier with 5 users, one inbox, and one Docs site.
• The cleanest, easiest interface of any support tool here.
• Built-in knowledge base, so you are not buying a second product.
• AI Answers is priced per resolution ($0.75) rather than per seat, which is buyer-friendly.

Tradeoffs

• Reporting is basic compared to Zendesk or Freshdesk, and custom report history is gated to higher tiers. This is the most consistent reviewer theme.
• Workflow customization feels restrictive once your needs get complex.
• Extra inboxes cost $10 per month each, and Pro requires a 10-user minimum.
• No native voice or WhatsApp.

Pricing: Free (5 users, 1 inbox). Standard $25 per user per month, Plus $45, Pro $75. (helpscout.com/pricing)

Also see: Help Scout vs InboxPilot.

5. Gmelius

Best for: Small Google Workspace teams who want a shared inbox plus Kanban boards, at the lowest Gmail-native price.

Strengths

• Cheapest true Gmail-native entry at $19 per user per month.
• Kanban and Trello-style boards on top of email, which is an unusual and genuinely useful combination.
• Shared labels, internal notes, and sequences.

Tradeoffs

• Gmail only. No Outlook, at all. One Outlook user on your team disqualifies this tool entirely. Confirmed on Gmelius's own pricing page.
• Speed complaints are persistent. Reviewers repeatedly report slow Gmail load times with the extension active, and Chrome extension bugs.
• The mobile app is the most-cited weak point.
• No free tier, and only a 7-day trial, which is not long enough to roll a shared inbox out to a team.

Pricing: Meli $19 per user per month annual ($21 monthly), Growth $25, Pro $40, Enterprise custom. (gmelius.com/pricing)

Also see: Gmelius vs InboxPilot.

6. Zendesk

Best for: Teams that have outgrown this category entirely and need a real help desk.

Zendesk is on this list so you can rule it in or out honestly. It is not a shared inbox. It is a ticketing suite, and that is a different purchase.

Strengths

• The deepest routing, reporting, and automation available anywhere here.
• Enormous app ecosystem.
• Scales to genuine enterprise volume.

Tradeoffs

• The $19 Support Team tier is a trap for this buyer. Anything resembling the suite starts at $55 per agent (Suite Team), and Professional is $115.
• Complexity and admin burden are the dominant reviewer criticisms. Setup takes real planning.
• Email stops feeling like email and becomes tickets. That is the entire point, and also the entire cost.

Pricing: Support Team $19 per agent per month annual. Suite Team $55, Suite Professional $115. No free tier. (zendesk.com/pricing)

Full comparison: InboxPilot vs Zendesk.

7. Freshdesk

Best for: Budget-conscious teams that want real ticketing and can live with rough edges.

Strengths

• Aggressive pricing at $19 per agent per month.
• Freddy AI included rather than bolted on.
• Solid knowledge base and customer portal.

Tradeoffs

• The free plan is not free forever. It is currently $0 for 1-2 agents for 6 months. Most roundups still describe an old perpetual free plan. Check before you plan around it.
• Duplicate and child ticket handling is a specific, recurring reviewer complaint: child tickets get treated as new tickets, and agents end up creating duplicates.
• Reporting is limited on lower tiers.

Pricing: Free for 1-2 agents for 6 months. Growth $19 per agent per month annual, Pro $55, Enterprise $89. (freshworks.com/freshdesk/pricing)

8. Google's native shared inbox (new in 2026)

Best for: Google Workspace teams who want a shared address in real Gmail, for free, and do not yet need coordination features.

Strengths

• Free on Business Starter, Standard, and Plus, with no add-on.
• Lives in actual Gmail, unlike the old Collaborative Inbox, which lived in the Google Groups interface and never appeared in the Gmail mobile app.
• Sends from the shared address, with a "sent by" attribution you can hide.

Tradeoffs

• No collision detection, no automation, no SLA reporting. It solves access, not coordination.
• Inherits Gmail's delegation ceilings (roughly 40 concurrent delegates, reduced further by extensions).
• Rolling out in phases, so it may not be in your Admin console yet.

Pricing: $0, included with Workspace. (Google Workspace admin docs)

9. Microsoft 365 shared mailbox

Best for: Microsoft shops with a low-volume info@ or reception@ address and a handful of people on it.

Strengths

• Free. No license required on the mailbox itself.
• Native in Outlook desktop, web, and mobile. Automapping means it simply appears.
• Includes a shared calendar.

Tradeoffs

• 25-user maximum, with "connection failures or duplicated messages" beyond it, per Microsoft's own docs.
• 50 GB hard stop without an Exchange Online Plan 2 license.
• No encryption, no way to prevent deletion, no external users.
• No assignment, no collision detection, no reporting.

Pricing: $0. (Microsoft Learn)

10. InboxPilot (a different category, and we are the publisher)

Best for: Teams whose problem is volume, not coordination.

Read this section knowing we wrote it. Here is the honest framing, and it is the reason InboxPilot is not our top pick:

Every other tool on this list helps humans divide the work faster. InboxPilot reduces how much work reaches humans at all. It is an AI layer that triages, labels, and drafts replies inside the Gmail or Outlook you already have. It is not a shared inbox tool.

Strengths

• Native in both Gmail and Outlook, which no other Gmail-native tool here manages (Gmelius is Gmail-only, Hiver needs a separate product for Outlook).
• AI drafts grounded in your own docs, help center, and connected tools like Shopify, Notion, and Pipedrive.
• Smart triage, auto-labeling, and plain-English email workflows.
• Priced per workspace by AI draft volume, not per seat.

Tradeoffs, stated plainly

• It does not do the thing this category is named after. No teammate assignment, no collision detection, no internal notes, no SLA reporting. If your problem is two agents replying to the same customer, InboxPilot will not fix that. Front, Hiver, Missive, or Help Scout will.
• Cost scales with email volume, not headcount. That is cheaper for a big team with modest volume and more expensive for a small team drowning in mail. Do the math on your actual volume before assuming it is the cheap option.
• Newer, with a shorter public review record than the incumbents.

Pricing: Free (25 AI drafts, 1 inbox). Hobby $23 per month. Standard $119 (1,500 drafts, unlimited inboxes). Pro $399. Enterprise custom. Per workspace, not per seat. (inboxpilot.co/pricing)

When it actually makes sense: you are still on a plain M365 or Google shared mailbox and want relief without a migration, or you already run Front or Hiver and want the repetitive volume deflected before it reaches a human. It pairs with a shared inbox. It does not replace one.

What a 5-person team actually pays in year one

Advertised entry prices are misleading, so here is the real number for a five-person support team, at list price, billed annually. No competitor publishes this.

Two things stand out. Front's real cost is closer to $3,900 than the $1,500 its entry tier implies. And InboxPilot's flat pricing looks unremarkable at five people, which is the honest picture: it gets more interesting at 15 people and less interesting at very high volume.

What to look for in shared inbox software

1. Rule out free first

If you are two or three people, Google's native shared inbox or the M365 shared mailbox may genuinely be enough. Spending $1,500 a year to solve a problem you do not have yet is the most common mistake in this category.

2. Check Outlook support before anything else

Gmelius does not support Outlook. Hiver's Gmail product does not either. If any meaningful part of your team is on Microsoft, that removes options before you compare a single feature.

3. Price the plan you will actually need

Front's $25 Starter is single-channel. Zendesk's $19 is not the Suite. Missive's $14 Starter caps at five users. Build the number from the plan you will really be on, at the headcount you will really have.

4. Ask what breaks at 3x volume

Every tool here works at low volume. Ask each vendor what fails first when volume triples: rule caps, load times, reporting depth, or the AI meter.

5. Separate the volume problem from the coordination problem

These are different problems with different solutions. Collision detection fixes coordination. It does nothing about volume. AI drafting fixes volume. It does nothing about coordination. Diagnose which one is actually hurting before you shop.

How to choose, in one paragraph

If you are two or three people on Workspace, try Google's native shared inbox and spend nothing. If you are a Gmail team who wants real coordination, Hiver is the lowest-friction upgrade and has a free tier. If you want the best product in the category and can pay for it, it is Front, at its real price rather than its advertised one. If you want a support-shaped tool with a knowledge base, Help Scout. If your team is on Microsoft, quietly cross Gmelius off the list. And if the honest diagnosis is that nobody is stepping on anyone's toes, there is just too much email, that is a volume problem, and InboxPilot is built for exactly that, alongside whichever shared inbox you land on.

Frequently asked questions

What is shared inbox software? Shared inbox software lets several people work one email address, like support@ or sales@, with assignment, collision detection, internal notes, and reporting layered on top. It sits between a plain shared mailbox, which offers access but no coordination, and a help desk, which converts email into tickets.

Is a shared mailbox in Microsoft 365 or Google Workspace good enough? For two or three people at low volume, usually yes, and it is free. Microsoft's own documentation states a shared mailbox supports a maximum of 25 users and warns that beyond that, users may see connection failures or duplicated messages. In practice teams hit coordination problems long before that ceiling, as soon as they need to know who is replying to what.

Does Google have a native shared inbox? Yes. Google Workspace admins can now create a shared email address from the Admin console under Users, and it appears inside real Gmail rather than the Google Groups interface. It is included on Business Starter, Standard, and Plus at no extra cost. It provides access and sending, but no collision detection, no automation, and no SLA reporting.

How much does shared inbox software cost in 2026? Entry pricing runs from about $14 to $25 per user per month. Missive starts at $14, Gmelius at $19, and Front, Hiver and Help Scout at $25. Watch the advertised entry tier: Front's $25 Starter is limited to a single channel type, and the plan most teams need is $65 per seat.

Which shared inbox tools work with Outlook? Front, Missive, Help Scout, Zendesk and Freshdesk all connect to Outlook as separate applications. Gmelius does not support Outlook at all and is Gmail-only. Hiver runs natively inside Gmail, with Outlook covered only through its separate Omni product. InboxPilot works natively in both Gmail and Outlook.

What is the difference between a shared inbox and a help desk? A shared inbox keeps the conversation feeling like email and adds coordination on top. A help desk converts each email into a ticket with queues, macros, portals, and CSAT, which gives you deeper reporting but stops feeling like email. Choose the help desk when you need SLAs and analytics, not before.

Related reading

• Best email management software: 11 tools for support teams: the wider category, including help desks.
• Hiver vs InboxPilot, Gmelius vs InboxPilot, Missive vs InboxPilot: the direct comparisons.
• How to automate email support: what to automate once your inbox is organized.

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Pricing verified against vendor pricing pages in July 2026 and stated per user per month unless noted. Platform limits are cited from Microsoft and Google's own administrator documentation. Vendors change pricing frequently, so confirm current rates before purchasing. InboxPilot is the publisher of this article and is one of the tools discussed.