Developer Tools · head to head
Hookdeck vs Microsoft Outlook
Hookdeck
Developer Tools
Event gateway that receives, queues, retries and replays inbound webhooks
- From
- Free
- Free plan
- Yes
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
- Free plan
- Yes
The short version
- Each has a real cost: Hookdeck pricing meters delivered events, so fan-out multiplies the bill: one inbound event routed to four services counts as four deliveries.; 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.
- They diverge on capability: Hookdeck covers Ingest and persist, Microsoft Outlook covers Exchange calendar integration.
- Prices and features above were last checked on 31 August 2026.
Where they differ
Only the attributes on which Hookdeck and Microsoft Outlook actually diverge.
| Attribute | Hookdeck | Microsoft Outlook |
|---|---|---|
| Pricing model | Per month by delivered event count | freemium |
| Platforms | Web, Linux, macOS, Windows | Web |
| Category | Developer Tools | Technology |
Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).
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 Hookdeck
- Ingest and persist
- Automatic retries
- Filters and fan-out
- Transformations
- Local development CLI
- Rate limiting
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
What people use each for
The jobs each tool is most often brought in to do.
Hookdeck
- A payments integration where losing a Stripe event during a deploy causes an order to go unfulfillednot Microsoft Outlook
- Fanning one provider webhook out to several internal services without each subscribing separatelynot Microsoft Outlook
- Debugging a partner integration by replaying the exact failing payload after shipping a fixnot Microsoft Outlook
- Receiving production-shaped webhooks on a developer laptop without running a public tunnelnot Microsoft Outlook
Microsoft Outlook
- Organisations on Exchange Online or Exchange Server where free/busy scheduling and room booking across everyone is a daily requirementnot Hookdeck
- Executive assistants managing someone else's calendar and mailbox through delegate access, which no IMAP client supports properlynot Hookdeck
- Regulated environments that need retention policies, legal hold and eDiscovery applied to mail centrally rather than per usernot Hookdeck
- Teams handling shared inboxes such as support or accounts, where permissions and tracking matter more than the mail client itselfnot Hookdeck
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Hookdeck
- Pricing meters delivered events, so fan-out multiplies the bill: one inbound event routed to four services counts as four deliveries.
- Free-tier retention is three days, which is shorter than the time it typically takes to notice a failing integration, so the payloads needed for a replay are often already gone.
- It becomes a single point of failure in front of every third-party integration, and an outage there means every provider webhook queues or fails at once.
- The transformation layer runs JavaScript in a constrained environment, so anything that needs a database lookup or an external call has to happen downstream instead.
- For a team already running Kafka or SQS the value is mostly the console and the replay UI, which is a hard cost to justify against infrastructure they already operate.
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.
Pricing, plan by plan
Hookdeck
Free- DeveloperFree
- Up to ten thousand events per month
- Three-day retention
- One user
- Team$39/month
- Ten thousand events included
- Unlimited users
- Pay as you go metering above the included events
- Growth$499/month
- Ten thousand events included plus metered usage
- Thirty-day retention
- Uptime and latency SLAs
- Enterprise$undefined/year
- Negotiated event volume
- Custom retention
- Dedicated support
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
Which should you pick?
Choose Hookdeck if
- You need ingest and persist.
- You want to start without paying.
- You work on Web, Linux, macOS, Windows.
- You also want automatic retries.
Choose Microsoft Outlook if
- You need exchange calendar integration.
- You want to start without paying.
- You also want delegate access.
Questions people ask
- Is Hookdeck or Microsoft Outlook better?
- Neither clearly leads. Hookdeck starts at Free and Microsoft Outlook at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Hookdeck or Microsoft Outlook?
- Hookdeck starts at Free and Microsoft Outlook at Free.
- Does Hookdeck or Microsoft Outlook run on more platforms?
- Hookdeck runs on Web, Linux, macOS, Windows. Microsoft Outlook runs on Web.
- Can I use Hookdeck for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is Hookdeck best used for?
- Hookdeck is most often used for a payments integration where losing a stripe event during a deploy causes an order to go unfulfilled, fanning one provider webhook out to several internal services without each subscribing separately, debugging a partner integration by replaying the exact failing payload after shipping a fix, receiving production-shaped webhooks on a developer laptop without running a public tunnel. Of those, a payments integration where losing a stripe event during a deploy causes an order to go unfulfilled and fanning one provider webhook out to several internal services without each subscribing separately are not what Microsoft Outlook is typically brought in for.
- What can Hookdeck do that Microsoft Outlook cannot?
- Hookdeck covers Ingest and persist, Automatic retries, Filters and fan-out, Transformations. Microsoft Outlook covers Exchange calendar integration, Delegate access, Shared mailboxes, Rules and Quick Steps.
Answered from the vendors’ own pages
Hookdeck: Is there a free plan?
Yes, ten thousand events a month with three-day retention and one user.
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.
Hookdeck: How is usage counted?
By delivered events, so a single inbound webhook fanned out to three destinations counts as three.
Microsoft 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.
Hookdeck: Can I replay a failed webhook?
Yes, individually or in bulk from the console, with the original payload.
Microsoft 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.
Hookdeck: Does it work for outbound webhooks too?
Yes, the same queueing, retry and observability applies to webhooks you send.
Microsoft 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.
Microsoft 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.
Related pages
More on Microsoft Outlook
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