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Comparison · Infra & APIs

Incus vs Scalar

A side-by-side editorial comparison of Incus and Scalar — release velocity, themes, recent moves, and the top alternatives to consider.

Incus vs Scalar: at a glance

FeatureIncusScalar
SectorInfra & APIsInfra & APIs
Velocity score5.05.0
Sparks · 30d00
Top themescontainer manager, live migration, sr-iov, project isolationapi-documentation, developer-tools, hosting, asyncapi
Last editorial update2h ago2h ago
WebsiteVisit →Visit →

What is Incus?

Incus 7.6 fixes 18 security issues, eight critical, and adds SR-IOV NIC live migration

Incus 7.6, released October 30, carries 18 security fixes, eight rated critical, many of them about restricted projects reaching the default project or the host, plus an authentication bypass through unverified client certificate chains. Its features aim at larger environments: live migration for VMs using SR-IOV NICs, multifd for VM live migration, cluster healing options, compression for block volumes, and OIDC opaque tokens. 7.5 before it added live migration between projects, cluster metrics and NVIDIA GPU cliques. The 7.0 LTS branch received a second patch, 7.0.2, with no described changes.

Read the full Incus trajectory →

What is Scalar?

Scalar is testing demand for hosting from inside localhost

The October 1.76 run put a sticky developer toolbar above the API reference on localhost, with Configure, Share, Deploy and Generate SDK tools in a side panel. The Deploy tool now shows a waitlist for API hosting on Scalar, and 1.76.4 records the server framework with each sign-up. AsyncAPI rendering kept improving, with binding schemas shown as structured properties. In another package line, 0.20.0 moved to Undici 8 with HTTP/2 on by default and raised the minimum Node.js version to 22.19.0.

Read the full Scalar trajectory →

Incus vs Scalar: editorial side-by-side

I
Incus
INFRA · APIS
5.0

Incus 7.6 fixes 18 security issues, eight critical, and adds SR-IOV NIC live migration

◆ Current state

Incus 7.6, released October 30, carries 18 security fixes, eight rated critical, many of them about restricted projects reaching the default project or the host, plus an authentication bypass through unverified client certificate chains. Its features aim at larger environments: live migration for VMs using SR-IOV NICs, multifd for VM live migration, cluster healing options, compression for block volumes, and OIDC opaque tokens. 7.5 before it added live migration between projects, cluster metrics and NVIDIA GPU cliques. The 7.0 LTS branch received a second patch, 7.0.2, with no described changes.

◆ Where it's heading

Live migration is still the through-line: 7.4 made it near-live for dependent disks, 7.5 took it across projects, and 7.6 extends it to VMs using SR-IOV NICs. The other thread is multi-tenancy under scrutiny. The size of the 7.6 security batch, with several critical items in project isolation, shows that restricted projects are now being tested as a real boundary, and the release adds a build and threat model for Anthropic's OSS Scanner.

◆ Prediction

Expect a 7.6.x patch or further security fixes, because the project-isolation findings cover a wide surface. The monthly feature cadence should continue with more live-migration throughput work, given multifd and the throughput improvements in this release.

S
Scalar
INFRA · APIS
5.0

Scalar is testing demand for hosting from inside localhost

◆ Current state

The October 1.76 run put a sticky developer toolbar above the API reference on localhost, with Configure, Share, Deploy and Generate SDK tools in a side panel. The Deploy tool now shows a waitlist for API hosting on Scalar, and 1.76.4 records the server framework with each sign-up. AsyncAPI rendering kept improving, with binding schemas shown as structured properties. In another package line, 0.20.0 moved to Undici 8 with HTTP/2 on by default and raised the minimum Node.js version to 22.19.0.

◆ Where it's heading

The reference is becoming a dev-time workbench, not only a published page. Tools that sat in dropdowns moved to a persistent panel, and SDK generation was consolidated there. The hosting waitlist is the commercial signal: Scalar is collecting framework data from developers at the moment they run their API locally, which gives it a demand measure before committing to a deployment flow. AsyncAPI work remains the other steady investment.

◆ Prediction

Expect the waitlist to turn into a hosting beta, with the first supported frameworks chosen from the data 1.76.4 collects; FastAPI, Hono and Express are already named for detection. The monorepo's patch cadence should otherwise continue daily or near it.

Alternatives to Incus and Scalar

Other Infra & APIs products tracked by Sparkpulse, ranked by recent ship velocity. Each card links to a full editorial trajectory and lets you pivot into a head-to-head comparison with either Incus or Scalar.

See all Incus alternatives → · See all Scalar alternatives →

Recent activity from Incus and Scalar

Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.

  1. 2d agoIncus18 security fixes, SR-IOV NIC live migration and multifd
  2. 3d agoScalarHosting waitlist now records the server framework
  3. 4d agoScalarDownloaded OpenAPI files named after the document title
  4. 5d agoScalarAsyncAPI schema rendering and a hosting waitlist on localhost
  5. 5d agoScalarSticky localhost toolbar with side panel and Deploy waitlist
  6. 10d agoScalar1.76.0 (2026-10-23)
  7. 10d agoScalar1.1.43 (2026-10-23)
  8. 16d agoIncusSecond patch on the 7.0 LTS branch
  9. 1mo agoIncusLive migration across projects, cluster metrics, NVIDIA GPU cliques
  10. 2mo agoIncusIncus 7.4 adds near-live migration and Secure Boot key management ⚡
  11. 3mo agoIncusNative Windows and macOS installers; QMP command timeouts
  12. 3mo agoIncusFirst patch release on the 7.0 LTS branch

Frequently asked questions

What is the difference between Incus and Scalar?

They serve adjacent needs but don't currently overlap on shipped themes. Incus and Scalar are shipping at a similar cadence (velocity 5.0 vs 5.0, both within Sparkpulse's "active" band). See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.

Is Incus better than Scalar?

Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Incus and Scalar are shipping at a similar cadence (velocity 5.0 vs 5.0, both within Sparkpulse's "active" band). For your specific use case, the alternatives sections above list other Infra & APIs products to evaluate alongside.

What are the best alternatives to Incus?

Top Incus alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "Incus alternatives" section above for the current picks, or visit /alternatives/incus for the full list with editorial commentary on each.

What are the best alternatives to Scalar?

Top Scalar alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "Scalar alternatives" section above for the current picks, or visit /alternatives/scalar for the full list with editorial commentary on each.