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Developer Tools · head to head

PartyKit vs Resolver

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PartyKit

Developer Tools

Platform for building and deploying realtime multiplayer servers on the edge

From
Free
Free plan
Yes
Full reviewWebsite
Resolver logo

Resolver

Cybersecurity

Risk, incident and investigations platform for corporate security and operational risk teams, owned by Kroll

From
On request
Free plan
No
Full reviewWebsite

The short version

  • Only PartyKit has a free tier, so it costs nothing to try first.
  • Each has a real cost: PartyKit documentation and FAQ material on the marketing site is sparse compared to larger realtime platforms.; Resolver kroll ownership since 2022 means the product is sold alongside risk consulting services, so buyers who want software with no services attach should expect that conversation and should price the licence separately in negotiation.
  • They diverge on capability: PartyKit covers Stateful edge servers, Resolver covers Incident management.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which PartyKit and Resolver actually diverge.

Attributes where PartyKit and Resolver differ
AttributePartyKitResolver
Starting priceFreeOn request
Pricing modelfreemiumquote
Free tierYesNo
Platformsweb, apiWeb, iOS, Android
CategoryDeveloper ToolsCybersecurity

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 PartyKit

  • Stateful edge servers
  • WebSocket-first API
  • CRDT library compatibility
  • Framework integrations
  • Global edge deployment
  • Custom domains

Only in Resolver

  • Incident management
  • Investigations
  • Enterprise risk management
  • Internal audit
  • Compliance and obligations
  • Business continuity
  • Risk Event Management
  • Configurable dashboards

What people use each for

The jobs each tool is most often brought in to do.

PartyKit

  • Multiplayer collaborative appsnot Resolver
  • Realtime AI agent backendsnot Resolver
  • Live cursors and presencenot Resolver
  • Collaborative whiteboards and documentsnot Resolver

Resolver

  • A national retailer consolidating store incident reporting, loss prevention cases and investigations into one system with defensible evidence handlingnot PartyKit
  • A bank that needs operational risk events captured against a risk and control register rather than in spreadsheets and emailnot PartyKit
  • A university security operations centre running dispatch, case management and clery-style reporting from a single recordnot PartyKit
  • An organisation that already retains Kroll for investigations and wants case intake and vendor handoff in the same platformnot PartyKit

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

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.

Resolver

  • Kroll ownership since 2022 means the product is sold alongside risk consulting services, so buyers who want software with no services attach should expect that conversation and should price the licence separately in negotiation.
  • Configuration flexibility comes at the cost of implementation time, with deployments commonly running several months and typically requiring vendor or partner services, so the first-year cost is well above the annual licence.
  • Module-based pricing means the platform gets expensive quickly once you add audit, compliance and continuity to a security-led purchase, and modules bought later rarely carry the discount of the original deal.
  • The IT and cyber compliance side is thinner than dedicated tools, so organisations chasing SOC 2 or ISO 27001 evidence automation will find it does not replace a Drata or Vanta.
  • Reporting is capable but the drag and drop builder has a real learning curve, and organisations that do not train an internal administrator end up raising support tickets for changes that should be self-service.

Pricing, plan by plan

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

Resolver

On request
  • Resolver Core$undefined/year
    • Priced by modules selected and number of users
    • Annual or multi-year enterprise agreement
    • Implementation and configuration quoted separately

Which should you pick?

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.
PartyKit review

Choose Resolver if

  • You need incident management.
  • You work on Web, iOS, Android.
  • You also want investigations.
Resolver review

Questions people ask

Is PartyKit or Resolver better?
Neither clearly leads. PartyKit starts at Free and Resolver at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, PartyKit or Resolver?
PartyKit has a free tier; the other does not. Paid plans start at Free for PartyKit and On request for Resolver.
Does PartyKit or Resolver run on more platforms?
PartyKit runs on web, api. Resolver runs on Web, iOS, Android.
Can I use PartyKit for free?
Yes. PartyKit has a free tier, so you can try it without paying. Resolver starts at On request.
What is PartyKit best used for?
PartyKit is most often used for multiplayer collaborative apps, realtime ai agent backends, live cursors and presence, collaborative whiteboards and documents. Of those, multiplayer collaborative apps and realtime ai agent backends are not what Resolver is typically brought in for.
What can PartyKit do that Resolver cannot?
PartyKit covers Stateful edge servers, WebSocket-first API, CRDT library compatibility, Framework integrations. Resolver covers Incident management, Investigations, Enterprise risk management, Internal audit.

Answered from the vendors’ own pages

PartyKit: How much does PartyKit cost?

PartyKit is completely free. Both the Individual and Commercial plans have no upfront costs.

Source
Resolver: Who owns Resolver?

Kroll, which acquired it in 2022. It is marketed as a Kroll business and sold alongside Kroll risk and investigations services.

PartyKit: 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.

Source
Resolver: What does Resolver cost?

Pricing is not published. It is quoted by module and user count on an annual or multi-year enterprise agreement, with implementation charged separately.

PartyKit: 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.

Source
Resolver: Is Resolver a SOC 2 compliance tool?

No. It is a risk, incident and investigations platform. Automated evidence collection for security certifications is not its strength.

PartyKit: 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.

Source
Resolver: How long does implementation take?

Months rather than weeks for a multi-module deployment, and most customers use vendor or partner services to configure it.

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