DNSControl
DNSControl is rewriting its record internals in public, one release candidate at a time
Comparison · Infra & APIs
GravityKit vs Nebula
A side-by-side editorial comparison of GravityKit and Nebula — release velocity, themes, recent moves, and the top alternatives to consider.
GravityKit vs Nebula: at a glance
What is GravityKit?
GravityKit is quietly turning Gravity Forms entries into a cross-form data layer.
Multiple Forms 0.7.0 adds unions — stacking entries from several Gravity Forms forms into one searchable View with no shared field and no code. It arrives alongside rich text inline editing in GravityEdit and GravityView 3.3.0, which carries compatibility fixes for Gravity Forms 3.0 and WordPress 7.0. The weekly Launch Log cadence is steady and covers the whole suite at once: View editor drag-to-copy, accessibility work including screen reader row headers, 3D map viewport loading, DataTables search and security, and Block MCP theme template editing.
What is Nebula?
Overlay network that rewrote its certificate format, then spent a year fixing what it exposed.
Nebula is a peer-to-peer mesh VPN built around a certificate authority model. The v1.10.0 release was the pivot: IPv6 and multiple addresses in the overlay, plus a new v2 ASN.1 certificate format with a unified interface for external implementations. Everything since has been consequence management — a P256 signature malleability issue that allowed blocklist bypass, a source-IP acceptance flaw tied to the new multi-address certificates, and a run of fixes around route tables and Windows listeners.
GravityKit vs Nebula: editorial side-by-side
GravityKit
5.0INFRA · APIS
GravityKit is quietly turning Gravity Forms entries into a cross-form data layer.
◆ Current state
Multiple Forms 0.7.0 adds unions — stacking entries from several Gravity Forms forms into one searchable View with no shared field and no code. It arrives alongside rich text inline editing in GravityEdit and GravityView 3.3.0, which carries compatibility fixes for Gravity Forms 3.0 and WordPress 7.0. The weekly Launch Log cadence is steady and covers the whole suite at once: View editor drag-to-copy, accessibility work including screen reader row headers, 3D map viewport loading, DataTables search and security, and Block MCP theme template editing.
◆ Where it's heading
Two lines are converging. The first treats form entries as a queryable dataset rather than per-form submissions — GravitySearch's cross-form search, and now unions, both dissolve the boundary between individual forms. The second is an agent surface: GravityKit MCP and Block MCP keep receiving updates, and GravityView 3.0 shipped AI-assisted View creation. A large share of recent releases is also absorbed by keeping the suite compatible with Gravity Forms 3.0 and WordPress 7.0, which sets the pace of everything else.
◆ Prediction
Expect unions to move from the Multiple Forms add-on toward the core View building experience, following the same path cross-form search took. Continued Gravity Forms 3.0 and WordPress 7.0 compatibility fixes will likely dominate the next few Launch Logs.
Nebula
2.5INFRA · APIS
Overlay network that rewrote its certificate format, then spent a year fixing what it exposed.
◆ Current state
Nebula is a peer-to-peer mesh VPN built around a certificate authority model. The v1.10.0 release was the pivot: IPv6 and multiple addresses in the overlay, plus a new v2 ASN.1 certificate format with a unified interface for external implementations. Everything since has been consequence management — a P256 signature malleability issue that allowed blocklist bypass, a source-IP acceptance flaw tied to the new multi-address certificates, and a run of fixes around route tables and Windows listeners.
◆ Where it's heading
The project has moved from single-IPv4-per-node assumptions toward a genuinely flexible addressing model, and the security fixes since v1.10.0 map directly onto that change — the new certificate features widened what the code has to validate. v1.11.0 shifts attention to the operational surface instead: structured logging, corrected firewall reject-versus-drop semantics, and Windows WFP filters installed by default.
◆ Prediction
The stated plan to assert low-s signature form when validating certificates is the concrete next step visible in these entries; expect it to land as a breaking validation change in a future release.
Alternatives to GravityKit and Nebula
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 GravityKit or Nebula.
Fission
Fission's release feed carries only RC tags, and none of them say what shipped
Kaniko
Kaniko's release feed stops dead in June 2024 after a patch that undid its own change
mod_auth_openidc
mod_auth_openidc audited itself, found eight holes, and broke every session on the way out
Antrea
Kubernetes CNI maintaining four release branches at once, mostly to carry CVE fixes back.
KeeWeb
KeePass-compatible password manager frozen mid-patch-run since 2021.
See all GravityKit alternatives → · See all Nebula alternatives →
Recent activity from GravityKit and Nebula
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 1d agoGravityKitAnnouncing unions for Multiple Forms: stack entries from many forms in one View
- 4d agoGravityKitLaunch Log: Multiple Forms unions, rich text inline editing, and Gravity Forms 3.0 fixes
- 11d agoGravityKitLaunch Log: Drag-to-copy in the View editor, Gravity Forms 3.0 fixes
- 18d agoGravityKitLaunch Log: theme template editing in Block MCP, Shield silentCAPTCHA for Zero Spam, and GravityView fixes
- 18d agoNebulaBreaking: slog logging, corrected firewall reject/drop directions, Windows WFP filters
- 25d agoGravityKitLaunch Log: Row headers for screen readers, smarter conditional logic, and multi-View fixes
- 1mo agoGravityKitLaunch Log: 3D map enhancements, smarter filtering, and improved performance on large data sets
- 6mo agoNebulaP256 signature malleability allowed blocklist bypass
- 6mo agoNebulaFix panic in use_system_route_table introduced by the previous release
- 6mo agoNebulaRoute-reload, handshake, and Windows listener fixes after the v1.10 rework
- 8mo agoNebulaIPv6 and multiple addresses in the overlay, plus a v2 certificate format ⚡
- 10mo agoNebulaPackets accepted from erroneous source IPs with unsafe_routes or multi-IP certificates
Frequently asked questions
What is the difference between GravityKit and Nebula?
They serve adjacent needs but don't currently overlap on shipped themes. GravityKit is currently shipping more aggressively (velocity 5.0 vs 2.5), with 0 editorial sparks in the last 30 days against 0. See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is GravityKit better than Nebula?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. GravityKit is currently shipping more aggressively (velocity 5.0 vs 2.5), with 0 editorial sparks in the last 30 days against 0. For your specific use case, the alternatives sections above list other Infra & APIs products to evaluate alongside.
What are the best alternatives to GravityKit?
Top GravityKit alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "GravityKit alternatives" section above for the current picks, or visit /alternatives/gravitykit for the full list with editorial commentary on each.
What are the best alternatives to Nebula?
Top Nebula alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "Nebula alternatives" section above for the current picks, or visit /alternatives/nebula-networking for the full list with editorial commentary on each.