Cybersecurity · head to head
Microsoft Defender vs PartyKit
Microsoft Defender
Cybersecurity
Always-on protection for you and your family's data and devices
- From
- $12/month
- Free plan
- No
PartyKit
Developer Tools
Platform for building and deploying realtime multiplayer servers on the edge
- From
- Free
- Free plan
- Yes
The short version
- Only PartyKit has a free tier, so it costs nothing to try first.
- Each has a real cost: Microsoft Defender defender Suite requires existing Microsoft 365 E3 or equivalent base licensing; PartyKit documentation and FAQ material on the marketing site is sparse compared to larger realtime platforms.
- Prices and features above were last checked on 29 August 2026.
Where they differ
Only the attributes on which Microsoft Defender and PartyKit actually diverge.
| Attribute | Microsoft Defender | PartyKit |
|---|---|---|
| Starting price | $12/month | Free |
| Pricing model | subscription | freemium |
| Free tier | No | Yes |
| Platforms | Web | web, api |
| Category | Cybersecurity | Developer Tools |
Identical on both: 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 Microsoft Defender
Nothing recorded that PartyKit does not also cover.
Only in PartyKit
- Stateful edge servers
- WebSocket-first API
- CRDT library compatibility
- Framework integrations
- Global edge deployment
- Custom domains
What people use each for
The jobs each tool is most often brought in to do.
Microsoft Defender
- Endpoint security and threat protectionnot PartyKit
- Identity and access securitynot PartyKit
- Email threat protectionnot PartyKit
- SaaS application security monitoringnot PartyKit
PartyKit
- Multiplayer collaborative appsnot Microsoft Defender
- Realtime AI agent backendsnot Microsoft Defender
- Live cursors and presencenot Microsoft Defender
- Collaborative whiteboards and documentsnot Microsoft Defender
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Microsoft Defender
- Defender Suite requires existing Microsoft 365 E3 or equivalent base licensing
- Some Defender products use pay-as-you-go pricing with variable costs
- Prices vary based on Microsoft agreements, requiring sales contact for custom quotes
PartyKit
- Documentation and FAQ material on the marketing site is sparse compared to larger realtime platforms.
- Commercial free tier requires deploying to the user's own Cloudflare account, adding setup complexity.
- Storage on the free Individual plan clears every 24 hours, limiting it to prototyping rather than persistent production data.
- Smaller ecosystem and community than more established realtime infrastructure providers.
Pricing, plan by plan
Microsoft Defender
$12/month- Microsoft Defender Suite$12/month
- Endpoint protection
- Identity threat detection
- Email security
- Microsoft 365 E5 with Defender$60/month
- Includes Defender Suite
- Microsoft Teams included
- Comprehensive security and compliance
- Microsoft Defender Vulnerability Management Add-on$2/month
- Vulnerability scanning and management
- One-month free trial available
- Annual commitment required
PartyKit
Free- IndividualFree
- Up to 10 live projects
- Deploy to the global edge platform
- Storage clears every 24 hours
- CommercialFree
- Unlimited projects
- Custom domains
- Runs on your own Cloudflare account; pay only Cloudflare usage
Which should you pick?
Choose Microsoft Defender if
Nothing in the data separates Microsoft Defender from PartyKit on the points above - pick on price and on how each one feels to use.
Choose PartyKit if
- You need stateful edge servers.
- You want to start without paying.
- You work on web, api.
- You also want websocket-first api.
Questions people ask
- Is Microsoft Defender or PartyKit better?
- Neither clearly leads. Microsoft Defender starts at $12/month and PartyKit at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Microsoft Defender or PartyKit?
- PartyKit has a free tier; the other does not. Paid plans start at $12/month for Microsoft Defender and Free for PartyKit.
- Does Microsoft Defender or PartyKit run on more platforms?
- Microsoft Defender runs on Web. PartyKit runs on web, api.
- Can I use PartyKit for free?
- Yes. PartyKit has a free tier, so you can try it without paying. Microsoft Defender starts at $12/month.
- What is Microsoft Defender best used for?
- Microsoft Defender is most often used for endpoint security and threat protection, identity and access security, email threat protection, saas application security monitoring. Of those, endpoint security and threat protection and identity and access security are not what PartyKit is typically brought in for.
- What can Microsoft Defender do that PartyKit cannot?
- PartyKit covers Stateful edge servers, WebSocket-first API, CRDT library compatibility, Framework integrations.
Answered from the vendors’ own pages
Microsoft Defender: How much does Microsoft Defender Suite cost?
Microsoft Defender Suite costs $12/user/month (paid yearly), but requires existing Microsoft 365 E3 or equivalent base licensing. It includes endpoint protection, identity threat detection, email security, and SaaS application monitoring.
SourcePartyKit: How much does PartyKit cost?
PartyKit is completely free. Both the Individual and Commercial plans have no upfront costs.
SourceMicrosoft Defender: What add-ons are available for Microsoft Defender?
Microsoft Defender Vulnerability Management Add-on costs $2/user/month with annual commitment and includes a one-month free trial. Additional pay-as-you-go products include External Attack Surface Management, Cloud Security Posture Management, and Sentinel.
SourcePartyKit: What is PartyKit's Individual plan?
The Individual plan is free and includes deployment to a global edge platform, support for up to 10 live projects, and is suitable for small projects. Storage is cleared every 24 hours.
SourceMicrosoft Defender: Is Defender included in Microsoft 365 E5?
Yes, Microsoft Defender Suite is included in Microsoft 365 E5 at $60/user/month (paid yearly with Teams). Prices may vary based on Microsoft agreements, requiring contact with Sales for customized quotes.
SourcePartyKit: What is PartyKit's Commercial plan?
The Commercial plan is free but requires deploying to your own Cloudflare account. It includes custom domains, unlimited projects, and you pay only your Cloudflare usage costs.
SourcePartyKit: Can I upgrade from Individual to Commercial plan?
Yes, both plans are free but offer different feature sets. The Commercial plan removes project restrictions but requires managing your own Cloudflare infrastructure.
SourceRelated pages
More on Microsoft Defender
Other head to heads
- Microsoft Defender vs Bitdefender Total Security
- Microsoft Defender vs Norton 360
- Microsoft Defender vs 1Password
- Microsoft Defender vs LastPass
- Microsoft Defender vs McAfee Total Protection
- Microsoft Defender vs Proofpoint
- Microsoft Defender vs CrowdStrike Falcon
- Microsoft Defender vs Avast One
- Microsoft Defender vs ESET NOD32 Antivirus
- Microsoft Defender vs Cybereason Defense Platform
- Microsoft Defender vs Fortinet FortiGate
- Microsoft Defender vs VMware Carbon Black
- Microsoft Defender vs Wireshark
- Microsoft Defender vs WorkOS
- Microsoft Defender vs Zscaler Internet Access
- Microsoft Defender vs Milestone XProtect
- Microsoft Defender vs Osano
- Microsoft Defender vs Bitdefender VPN
- Microsoft Defender vs Soketi
- Microsoft Defender vs GitHub Copilot
- Microsoft Defender vs Pieces for Developers
- Microsoft Defender vs CodeSandbox
- Microsoft Defender vs Moonrepo
- Microsoft Defender vs Swagger UI
- Microsoft Defender vs Coder
- Microsoft Defender vs StackBlitz
- Microsoft Defender vs Deep Code
- Microsoft Defender vs Refact
- Microsoft Defender vs Earthly
- Microsoft Defender vs Buildkite
- Microsoft Defender vs SonarQube
- Microsoft Defender vs Sourcegraph
- Microsoft Defender vs Sweep
- Microsoft Defender vs Visual Studio
- Microsoft Defender vs Warp
- Microsoft Defender vs Xlinesoft
- PartyKit vs Bitdefender Total Security
- PartyKit vs Norton 360
- PartyKit vs 1Password
- PartyKit vs LastPass
- PartyKit vs McAfee Total Protection
- PartyKit vs Proofpoint
- PartyKit vs CrowdStrike Falcon
- PartyKit vs Avast One
- PartyKit vs ESET NOD32 Antivirus
- PartyKit vs Cybereason Defense Platform
- PartyKit vs Fortinet FortiGate
- PartyKit vs VMware Carbon Black
- PartyKit vs Wireshark
- PartyKit vs WorkOS
- PartyKit vs Zscaler Internet Access
- PartyKit vs Milestone XProtect
- PartyKit vs Osano
- PartyKit vs Bitdefender VPN
- PartyKit vs Soketi
- PartyKit vs GitHub Copilot
- PartyKit vs Pieces for Developers
- PartyKit vs CodeSandbox
- PartyKit vs Moonrepo
- PartyKit vs Swagger UI
- PartyKit vs Coder
- PartyKit vs StackBlitz
- PartyKit vs Deep Code
- PartyKit vs Refact
- PartyKit vs Earthly
- PartyKit vs Buildkite
- PartyKit vs SonarQube
- PartyKit vs Sourcegraph
- PartyKit vs Sweep
- PartyKit vs Visual Studio
- PartyKit vs Warp
- PartyKit vs Xlinesoft