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Front is the pick when the inbox spans several channels and you want AI agents with write access, Help Scout when you want collision detection that just works on every plan, and Drag when the team lives in Gmail and the budget is tight. All seven were compared on collision detection, assignment, internal notes, SLA policies, published pricing, MCP status, and API access.
Front is the best overall shared inbox software for most teams in 2026. It covers email, chat, SMS, and custom channels in one queue and runs the only MCP server here with write access. If your team lives in Gmail on a budget under $15 a seat, Drag is the better buy and ships its own open-source MCP server, which also makes it the best shared inbox software for small business teams that don't want to migrate off Gmail.
Where the Shared Inbox Ends and the Help Desk Begins
A shared inbox is one address, worked by a team. Assignment so every message has an owner, collision detection so two people never send the same reply, internal notes so context stays off the customer thread, and status tracking to prove nothing was dropped. That is the whole job.
It is deliberately less than a ticketing suite. No reference number, no priority matrix, no escalation tier. Teams that need those want our help desk software roundup or our ticketing systems comparison, and teams already there will find deflection tooling in our customer service automation guide.
Every product below can be pushed toward ticketing, and several want to be. The ones worth buying keep the thread looking like email.
Why You Need Shared Inbox Software
- A forwarded mailbox has no owner. Group aliases distribute copies. Nobody is accountable, and everyone assumes someone else replied.
- Duplicate replies are the visible failure. Collision detection separates real shared inbox software from delegated mailbox access.
- Context belongs off the customer thread. Internal notes keep the side conversation out of the reply-all chain.
- Response time needs a number. SLA policies turn a vague "we're behind" into a threshold that fires before the customer complains.
- Departures should not take the history. A shared mailbox survives offboarding. A forwarding rule does not.
Related tooling sits in our helpdesk software category and our customer service software category.
How We Evaluated
Each tool was scored on the four mechanics that define the category, assignment, collision detection, internal notes, and SLA policies, then on published per-seat pricing, AI and MCP maturity, and the public API. Every price came from the vendor's own pricing page in August 2026. Full criteria live in our methodology.
1. Front
Front is the most capable product here and the one most likely to outgrow the category. It keeps threads looking like email while handling chat, SMS, and custom channels in one queue, and its MCP server is the only one here that writes.
Pricing: Starter is $25 per seat per month billed annually, capped at 10 seats. Professional is $65, capped at 50. Enterprise is $105 and includes the AI add-ons, which otherwise cost $20 a seat for Copilot, $20 for Smart QA, $10 for Smart CSAT, and from $0.05 per conversation for Autopilot.
Top Features
- Real-time collision detection
- Internal comments and shared drafts on all plans
- Email, chat, SMS, and custom channels in one queue
- Routing, escalation, and cross-team looping
- SLA tracking and performance reporting
- 160-plus documented integrations
Pros
- Broadest channel coverage of the seven
- MCP server changes assignment and status, not just reads
- API on every plan tier
Cons
- Seat ceilings force upgrades at 10 and 50 users
- AI is four separate add-ons below Enterprise
AI/MCP Integration: Official, open beta. Front's server sits at mcp.frontapp.com/mcp behind an OAuth app an admin scopes. It reads and composes across every channel, posts internal comments, tags conversations, and changes assignment and status, with each user still bound by their Front role. Claude, Claude Code, Cursor, and ChatGPT developer mode work with it.
API Integration: Yes. Rate limits are 50 requests per minute on Starter, 100 on Professional, and 200 on Enterprise, enforced per company rather than per token. Higher limits cost $200 per 100 requests a minute.
Cloud Based: Yes, SaaS.
Platforms: Web, desktop, and mobile, on any email provider.
Best For: Teams whose shared address is one channel of several, wanting an assistant that acts.
Editor score: 4.6/5. The most complete product here, priced accordingly, with early seat ceilings.
2. Help Scout
Help Scout has the cleanest treatment of the mechanic buyers actually test. Collision detection is on by default on every plan with nothing to configure: yellow when a teammate is viewing, red when replying, and any conflicting reply is paused into a Needs Attention folder rather than sent.
Pricing: Free is $0 for up to 5 users. Standard is $25 per user per month for up to 25, Plus $45 for up to 50, Pro $75 unlimited at a 10-seat minimum. AI Answers costs $0.75 per resolution with a three-month trial.
Top Features
- Automatic collision detection with viewing and replying states
- Live chat, SMS, WhatsApp, Instagram, and Messenger inboxes
- SLA policies from one basic rule to unlimited
- Workflows, saved replies, snooze, and send later
- Docs knowledge base and the Beacon portal
- Light user seats on higher tiers
Pros
- Only genuinely free tier on this list
- Collision detection needs no setup and cannot be misconfigured
- SSO, SAML, and HIPAA without a custom contract
Cons
- Seat ceilings at 25 and 50 push teams up the ladder
- MCP server is read-only, so it cannot assign or reply
AI/MCP Integration: Official, generally available since July 28, 2026, and read-only. Each member connects with their own credentials, so an assistant sees exactly what that person can see. Claude, ChatGPT, and Cursor are supported, and write capability is planned rather than shipped.
API Integration: Yes. An Inbox API, a Docs API, Beacon, sidebar Apps, and webhooks, with rate limits from 200 calls per minute on Free to 800 on Pro.
Cloud Based: Yes, SaaS.
Platforms: Web and mobile, 100-plus integrations.
Best For: Support teams wanting inbox mechanics done properly, plus a knowledge base, without ticketing.
Editor score: 4.5/5. The most polished execution of the core job. Read-only MCP is where it trails Front.
3. Missive
Missive is built around the internal conversation rather than the ticket. Every thread carries a chat channel beside it, drafts can be co-written, and read statuses show who has seen what. At $14 a seat it is also the cheapest route to SMS and social in one queue.
Pricing: Starter is $14 per user per month billed annually for up to 5 users, Productive $24 for up to 50, Business $36 unlimited. Annual billing saves 20 percent.
Top Features
- Internal chat threads attached to each conversation
- Collaborative drafting with live co-editing
- Email, SMS, WhatsApp, Messenger, and Instagram on all plans
- Team spaces, shared contact books, and guest access
- Up to 1,000 rules on Productive
- Audit trail and SOC 2 Type II on every tier
Pros
- Cheapest multi-channel entry point here
- SOC 2 Type II included at the $14 tier
- AI assistant runs on your own Anthropic, OpenAI, or Gemini key
Cons
- API access starts at the $24 Productive tier
- Publishes no MCP server of its own
AI/MCP Integration: Client, not server. Missive connects outward to MCP servers, shipping built-in integrations for Notion, Linear, and Attio plus custom servers. Nothing first-party exposes Missive itself; the servers that do are community builds with no vendor support.
API Integration: Yes, from the Productive tier. Starter has none. Business adds SAML SSO and IP restrictions.
Cloud Based: Yes, SaaS.
Platforms: Web, desktop, and mobile, with video and telephony via Twilio.
Best For: Teams whose shared inbox doubles as their coordination channel.
Editor score: 4.4/5. The best collaboration model here, with MCP pointing the wrong way for agents that work the queue.
4. Drag
Drag turns Gmail into a shared inbox with Kanban boards and never moves the mail. No migration, no second login, no retraining. It also ships the most complete MCP server here by tool count, unusual at $12 a seat.
Pricing: Starter is $12 per user per month billed annually or $16 monthly, Plus is $18 or $22, and Pro is $24 or $30. Users are unlimited with no seat minimums, and there is a 7-day trial.
Top Features
- Runs inside Gmail, mail never leaves Gmail
- Collision detection and internal notes on every tier
- Kanban boards over the shared queue
- 10 automation rules on Starter, unlimited above
- SLA rules and a WhatsApp channel on Pro
- Open-source MCP server with 47 tools
Pros
- Cheapest entry price, no seat minimum at any tier
- Collision detection and internal notes are not upsells
- MIT-licensed MCP server with read and write access
Cons
- API and MCP both sit behind the $24 Pro tier
- Gmail only, so mixed Gmail and Outlook teams are out
AI/MCP Integration: Official and open source. The MIT-licensed @dragapp/mcp-server exposes 47 tools across 12 categories covering email, WhatsApp, boards, cards, contacts, knowledge base, analytics, and automations, with read and write access from a personal API key that inherits your Drag permissions. One mismatch to check: the MCP page says access is included on every paid plan, while the pricing table lists it on Pro only.
API Integration: Yes, on the Pro tier. The REST API and MCP server are both marked Pro, and neither is on Starter or Plus.
Cloud Based: Yes, a Gmail extension with a hosted backend.
Platforms: Gmail on Chrome, plus mobile.
Best For: Gmail-native teams wanting board-style triage, at $24 a seat for agent access.
Editor score: 4.3/5. Remarkable MCP depth for the price, undercut by gating both developer surfaces to the top tier.
5. Gmelius
Gmelius is the other Gmail-native option, and it splits its ladder oddly. The $19 Meli tier is a personal AI assistant with no shared inboxes, so the real entry price is $25. From there it is solid: unlimited inboxes, collision detection, notes with mentions, and SLA analytics.
Pricing: Meli is $19 per user per month billed annually or $21 monthly, Growth $25 or $33, Pro $40 or $50. Enterprise is custom at a 50-user minimum. Conversation caps run from 5,000 a month on Meli to 100,000 on Pro.
Top Features
- Unlimited shared inboxes from the Growth tier
- Collision detection with internal notes and mentions
- Shared Gmail labels synced across the team
- Kanban boards over email
- SLA and email analytics from Growth
- Meli AI assistant on Google Gemini models
Pros
- API access on every tier, including the cheapest
- Unlimited shared inboxes rather than a per-inbox count
- Runs as a Workspace app alongside the extension
Cons
- The $19 tier has no shared inbox, so the real entry price is $25
- Monthly billing carries a steep premium, $33 against $25
AI/MCP Integration: None documented as of August 2026. Gmelius sells Meli, an assistant on Google's Gemini models that drafts, sorts, schedules, and dispatches email, with AI dispatching reserved for Pro. No MCP server appears on the site.
API Integration: Yes, on every tier. Gmelius runs a developer hub, with webhooks added at Pro.
Cloud Based: Yes, a Gmail extension and Workspace app.
Platforms: Gmail on desktop browsers, plus iOS and Android.
Best For: Gmail teams wanting unlimited inboxes and API access without a top tier.
Editor score: 4.1/5. Good mechanics, spoiled by a headline price that excludes the headline product.
6. Keeping
Keeping is the narrowest tool here, and that is the point. It puts support@ inside Gmail with assignment, collision detection, notes, and SLAs, then stops. Nothing claims AI or an API, which disqualifies it for some buyers and recommends it to others.
Pricing: Essentials is $14 per user per month billed annually or $19 monthly, Advanced $24 or $29, HIPAA $49 or $59. Essentials covers 2 shared mailboxes; Advanced makes them unlimited.
Top Features
- Shared mailboxes managed inside Gmail
- Collision detection on every plan
- Shared notes with mentions and shared drafts
- SLA policies from Advanced
- Workflows, templates, and an autoresponder
- HIPAA compliance with a signed BAA on the top plan
Pros
- HIPAA plan with a signed BAA at a published $49
- Collision detection at the $14 entry tier
- Conversations stay reachable outside Gmail on mobile and web
Cons
- No public API or AI features documented on the site
- Essentials caps at 2 shared mailboxes
AI/MCP Integration: None documented as of August 2026. Keeping publishes no AI features and no MCP server, the only tool here with no AI story.
API Integration: Not documented publicly. Keeping lists integrations on the Advanced tier but no developer API reference as of August 2026.
Cloud Based: Yes, a Gmail extension with a hosted backend.
Platforms: Gmail through a Chrome or Safari extension, plus mobile.
Best For: Small Gmail teams, healthcare included, wanting the four core mechanics and nothing else.
Editor score: 3.9/5. Does the job at a fair price. The absent API is a real ceiling.
7. Loop Email
Loop is the one product here that works equally well outside Google, connecting to Microsoft 365, Outlook, Exchange, IMAP, and Gmail. That makes it the candidate for Microsoft-first teams. Its pricing page contradicts itself.
Pricing: Starter is €15 per user per month, 3-user minimum, 3 shared inboxes. Pro is €30, 10-user minimum, 10 inboxes. Enterprise is custom at a 30-user minimum. A second set of figures appears at €18.75 and €37.50; the toggle advertises 20 percent off annual while the footnotes label the lower figures as monthly, so confirm the term. Prices also display in USD, CAD, GBP, and AUD.
Top Features
- Shared inbox across Microsoft 365, Outlook, Exchange, IMAP, Gmail
- Conversation ownership and assignment
- Internal team chat alongside email
- Workflow automation for routing and tagging
- Shared templates for consistent replies
- SLA monitoring and reporting
Pros
- Only tool here built for Outlook and Microsoft 365
- Unlimited users on every plan tier
- Prices shown in five currencies
Cons
- Seat minimums of 3, 10, and 30 by tier
- No API, AI features, or MCP documented on the site
AI/MCP Integration: None documented as of August 2026. Loop describes workflow automation and reporting but publishes no AI assistant and no MCP server.
API Integration: Not documented publicly. Loop publishes no developer API reference as of August 2026.
Cloud Based: Yes, with desktop and mobile apps. The shared inbox needs desktop version 5.8.0 or later.
Platforms: Microsoft 365, Outlook, Exchange, IMAP, and Gmail.
Best For: Microsoft-first teams needing a shared inbox without leaving Outlook.
Editor score: 3.8/5. The right answer for Outlook shops. The pricing page needs fixing and the missing API caps it.
Comparison Table
| Tool | Best For | Starting Price | Standout Feature | AI-MCP Support | API Integration |
|---|---|---|---|---|---|
| Front | Multi-channel teams | $25 per seat monthly | Read-write MCP server | Official, open beta | Yes, all plans |
| Help Scout | Support teams | Free, then $25 | Automatic collision detection | Official, read-only | Yes, all plans |
| Missive | Collaboration-heavy teams | $14 per user monthly | Internal chat per thread | MCP client only | Productive tier up |
| Drag | Gmail teams on a budget | $12 per user monthly | 47-tool open-source server | Official, Pro tier | Pro tier only |
| Gmelius | Gmail teams needing API | $25 for shared inboxes | Unlimited shared inboxes | None documented | Yes, all tiers |
| Keeping | Small Gmail and HIPAA teams | $14 per user monthly | Published HIPAA plan | None documented | Not documented |
| Loop Email | Outlook and Microsoft 365 | €15 per user monthly | Multi-provider support | None documented | Not documented |
More support tooling sits in our customer support blog category.
How to Choose
- Test collision detection first. Implementations differ more than the marketing suggests.
- Check the seat ceiling, not the seat price. Front caps its $25 tier at 10 users, Help Scout at 25.
- Decide whether the mail should move. Drag, Gmelius, and Keeping leave it in Gmail, which removes the migration and caps the ceiling.
- Count your channels honestly. If SMS or WhatsApp is in scope, three of these seven drop off.
- Separate an MCP server from an MCP client. Missive connects out; Front, Help Scout, and Drag expose their own inbox.
- Confirm the API is on your tier. Gmelius includes it at the bottom, Missive and Drag at $24, two vendors document none.
- If you catch yourself asking for priority fields, buy a help desk instead.
What This Actually Costs
Take a ten-person team on annual billing. Drag runs $120 a month, $1,440 a year, with no seat minimum. Missive's Starter caps at five users, so ten people land on Productive at $240 a month, near $2,880 a year. Keeping's Advanced tier is also $240 a month.
Front is the expensive end. Starter at $25 a seat covers ten users exactly, $250 a month or $3,000 a year, but adding Copilot at $20 a seat takes it to $450. Help Scout Standard is also $250 and includes collision detection, SLAs, and multi-channel with no add-ons, so the two look closer on a price list than in a quote.
The spread is roughly $1,400 to $5,400 a year for the same ten people, and the gap is mostly AI add-ons and channels.
Final Thoughts
The instinct is to shortlist on feature count. Do the opposite. All seven handle assignment and notes competently, so the decision comes down to three things: where your mail already lives, how many channels you run, and whether you want an assistant to read the queue or work it.
Front takes the overall pick because it answers the third question best, with the only server here that reassigns and replies rather than summarizes. Help Scout is the pick if you want the core mechanics with no configuration and a free tier to prove it. Drag is the value pick, and the most surprising engineering here at $12 a seat. Loop is the answer for Outlook shops.
Worth noting what did not happen: nobody used this category as an excuse to hide pricing. All seven publish per-seat numbers, which most software categories cannot manage.