Technology · head to head
Microsoft Outlook vs Sentry
Microsoft Outlook
Technology
Microsoft's email and calendar client, in the middle of a transition from the classic Windows application to a web-based replacement.
- From
- Free
- Rated
- -
Sentry
Technology
Application monitoring platform built by developers for developers
- From
- Free
- Rated
- -
The short version
- Each has a real cost: Microsoft Outlook microsoft is replacing the classic Win32 client with the new web-based Outlook, and the new one runs only web add-ins, not COM add-ins, so any line-of-business integration for CRM, dictation, document management or telephony must be rewritten or the desktop stays on classic until its support window closes.; Sentry spending caps stop event ingestion when reached, eliminating visibility during critical moments
- They diverge on capability: Microsoft Outlook covers Exchange calendar integration, Sentry covers Error tracking.
- Prices and features above were last checked on 30 August 2026.
Where they differ
Only the attributes on which Microsoft Outlook and Sentry actually diverge.
| Attribute | Microsoft Outlook | Sentry |
|---|---|---|
| Pricing model | freemium | Unknown |
| Platforms | Web | Web, iOS, Android, React Native, Desktop, 30+ frameworks and languages |
| Founded | Unknown | 2011 |
Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Technology).
What each one covers
Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.
Only in Microsoft Outlook
- Exchange calendar integration
- Delegate access
- Shared mailboxes
- Rules and Quick Steps
- Retention, hold and eDiscovery
- Sensitivity labels and encryption
- Add-in platform
- Offline cached mode
Only in Sentry
- Error tracking
- Performance monitoring
- Release tracking
- Real user monitoring
- Alerting
- Issue assignment
- Breadcrumbs
- Source maps
What people use each for
The jobs each tool is most often brought in to do.
Microsoft Outlook
- Organisations on Exchange Online or Exchange Server where free/busy scheduling and room booking across everyone is a daily requirementnot Sentry
- Executive assistants managing someone else's calendar and mailbox through delegate access, which no IMAP client supports properlynot Sentry
- Regulated environments that need retention policies, legal hold and eDiscovery applied to mail centrally rather than per usernot Sentry
- Teams handling shared inboxes such as support or accounts, where permissions and tracking matter more than the mail client itselfnot Sentry
Sentry
- Error monitoringnot Microsoft Outlook
- Performance trackingnot Microsoft Outlook
- Debug production issuesnot Microsoft Outlook
- Release managementnot Microsoft Outlook
- User monitoringnot Microsoft Outlook
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Microsoft Outlook
- Microsoft is replacing the classic Win32 client with the new web-based Outlook, and the new one runs only web add-ins, not COM add-ins, so any line-of-business integration for CRM, dictation, document management or telephony must be rewritten or the desktop stays on classic until its support window closes.
- The new client's handling of non-Microsoft accounts synchronises mail through Microsoft's cloud rather than connecting from the machine to the provider, which several organisations' data residency and handling policies do not allow, and it is not an optional behaviour.
- PST and OST files are a single-file, corruptible and effectively unshareable store, and the new client's reduced PST support means years of personal archives sitting in those files need an explicit migration plan rather than carrying forward.
- Large mailboxes turn software problems into administration ones: search index rebuilds, OST files of tens of gigabytes and the mailbox quotas of whichever plan was bought, and the usual fix is archiving policy rather than anything a user can do.
- Against IMAP or Gmail you lose most of what justifies it, including free/busy lookup, room booking, delegate access, and retention and compliance policies, because those are Exchange server features rather than client features.
- The five or six products sharing the Outlook name have materially different feature sets, so internal documentation, training and support procedures must be written per platform and a user moving between desktop, web and mobile finds the same task done differently in each.
Sentry
- Spending caps stop event ingestion when reached, eliminating visibility during critical moments
- Complex configuration required for filters, sampling rules, issue grouping, and alert policies
- Difficult to configure custom alerts and alert content without creating email inbox bloat
- Error grouping is imperfect with noise and filtering issues causing incorrect error prioritization
- Weak for distributed tracing across microservices compared to dedicated APM tools
- UI dashboard is less customizable than alternatives like Datadog APM for complex monitoring needs
Pricing, plan by plan
Microsoft Outlook
Free- Outlook (Free)Free
- 15 GB mailbox storage
- 5 GB cloud storage
- Web and mobile Office app access
- Microsoft 365 Basic$1.99/month
- 100 GB mailbox storage
- 100 GB cloud storage
- Ad-free experience
- Microsoft 365 Personal$9.99/month
- 1 TB cloud storage
- Desktop Office apps (Word, Excel, PowerPoint, Outlook, OneNote)
- Copilot with high usage limits
- Microsoft 365 Family$12.99/month
- 1-6 users
- Up to 6 TB total cloud storage (1 TB per person)
- Same apps and features as Personal
Sentry
Free- Developer (Free)Free
- 5K errors per month
- 1 user seat
- 30-day data retention
- Team$26/month
- 50K errors per month
- 5M transaction spans
- 90-day data retention
- Business$80/month
- Higher quotas
- Extended retention
- Advanced filtering
- Organization$199/month
- SSO integration
- Audit logs
- Advanced security
Which should you pick?
Choose Microsoft Outlook if
- You need exchange calendar integration.
- You want to start without paying.
- You also want delegate access.
Choose Sentry if
- You need error tracking.
- You want to start without paying.
- You work on Web, iOS, Android, React Native, Desktop, 30+ frameworks and languages.
- You also want performance monitoring.
Questions people ask
- Is Microsoft Outlook or Sentry better?
- Neither clearly leads. Microsoft Outlook starts at Free and Sentry at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Microsoft Outlook or Sentry?
- Microsoft Outlook starts at Free and Sentry at Free.
- Does Microsoft Outlook or Sentry run on more platforms?
- Microsoft Outlook runs on Web. Sentry runs on Web, iOS, Android, React Native, Desktop, 30+ frameworks and languages.
- Can I use Microsoft Outlook for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is Microsoft Outlook best used for?
- Microsoft Outlook is most often used for organisations on exchange online or exchange server where free/busy scheduling and room booking across everyone is a daily requirement, executive assistants managing someone else's calendar and mailbox through delegate access, which no imap client supports properly, regulated environments that need retention policies, legal hold and ediscovery applied to mail centrally rather than per user, teams handling shared inboxes such as support or accounts, where permissions and tracking matter more than the mail client itself. Of those, organisations on exchange online or exchange server where free/busy scheduling and room booking across everyone is a daily requirement and executive assistants managing someone else's calendar and mailbox through delegate access, which no imap client supports properly are not what Sentry is typically brought in for.
- What can Microsoft Outlook do that Sentry cannot?
- Microsoft Outlook covers Exchange calendar integration, Delegate access, Shared mailboxes, Rules and Quick Steps. Sentry covers Error tracking, Performance monitoring, Release tracking, Real user monitoring.
Answered from the vendors’ own pages
Microsoft Outlook: What is the difference between classic Outlook and the new Outlook for Windows?
Classic is the long-standing Win32 application shipped with Microsoft 365 and Office LTSC. The new Outlook is a web-based client that replaced Windows Mail and Calendar. The most consequential difference is add-ins: the new client supports only web add-ins, not COM add-ins.
Sentry: Does Sentry have a free tier?
Yes. The free Developer tier includes 5,000 errors per month, one user seat, 30-day retention, and 50 session replays per month.
SourceMicrosoft Outlook: How long will classic Outlook be supported?
Microsoft has stated support through at least 2029. That is a planning window rather than a reprieve, and organisations with COM add-in dependencies should be scoping the replacement work now.
Sentry: How much do Sentry's paid plans cost?
Team plan starts at $26/month (annual) or $29/month (monthly) with 50K errors and 5M spans included. Business plan is $80-89/month. Organization plans start at $199/month with SSO and advanced compliance features.
SourceMicrosoft Outlook: Can I use Outlook with Gmail or another IMAP provider?
Yes, but with reduced capability. You lose free/busy lookup, room booking, delegate access and server-side compliance policies, because those come from Exchange rather than from the client.
Sentry: What programming languages does Sentry support?
Sentry supports over 30 languages and frameworks including JavaScript, Python, Go, Ruby, Java, .NET, PHP, Node.js, and mobile platforms including iOS, Android, and React Native.
SourceMicrosoft Outlook: Is Outlook free?
Outlook on the web and the mobile apps are free with a Microsoft account, and the new Outlook for Windows is included with Windows 11. The classic desktop application requires a Microsoft 365 subscription or an Office perpetual licence.
Sentry: Does Sentry support self-hosting?
Yes. Sentry can be self-hosted, and the open-source version is available for deployment in on-premises environments.
SourceMicrosoft Outlook: Will my COM add-ins work in the new Outlook?
No. The new client supports only the cross-platform web add-in model. Vendors must publish a web add-in, and where they have not, the choice is to stay on classic Outlook or replace the integration.
Sentry: How does Sentry billing work if I exceed my quota?
Sentry offers spending caps that stop ingestion when reached, meaning you lose visibility exactly when you need it most. You can pre-purchase reserved capacity at 20% discount or pay per event on-demand when exceeding included allotment.
SourceSentry: What integrations does Sentry support?
Sentry integrates with GitHub, GitLab, Jira, Slack, PagerDuty, most CI/CD pipelines, and many other developer tools.
SourceRelated pages
More on Microsoft Outlook
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