Skipper
Skipper fixes two silent data-loss bugs — body truncation on large requests and multi-value header drops.
Comparison · Infra & APIs
Currents vs Nebula
A side-by-side editorial comparison of Currents and Nebula — release velocity, themes, recent moves, and the top alternatives to consider.
Currents vs Nebula: at a glance
What is Currents?
Currents is building the agent-native CI layer: machine-readable failure context, IDE integration, scoped API tokens.
Currents is a Playwright/Cypress test observability platform that has made two explicitly agent-targeted moves in recent months: a shareable .md endpoint for test failures (structured failure context fetchable by AI agents without a Currents login) and a VS Code/Cursor extension that puts CI run history inside the IDE where AI agents can act on it. Personal Access Tokens — scoped per-user API tokens replacing the shared org key — just landed this week, addressing a real security gap in the API access model.
What is Nebula?
Nebula closes a firewall bypass that let unparsed IPv6 protocols match TCP rules
Nebula is a peer-to-peer mesh VPN built around a certificate authority model. v1.10.0 was the pivot — IPv6 and multiple addresses in the overlay, plus a v2 ASN.1 certificate format with a unified interface for external implementations — and everything since has been consequence management. v1.11.0 shifted to the operational surface with structured slog logging, corrected firewall reject-versus-drop semantics, and Windows WFP filters by default. v1.11.1 returns to the packet classifier: IPv6 packets whose next header Nebula does not parse were being misread as TCP or UDP and matched against TCP/UDP firewall rules, and are now classified as their true protocol with no ports.
Currents vs Nebula: editorial side-by-side
Currents
6.3INFRA · APIS
Currents is building the agent-native CI layer: machine-readable failure context, IDE integration, scoped API tokens.
◆ Current state
Currents is a Playwright/Cypress test observability platform that has made two explicitly agent-targeted moves in recent months: a shareable .md endpoint for test failures (structured failure context fetchable by AI agents without a Currents login) and a VS Code/Cursor extension that puts CI run history inside the IDE where AI agents can act on it. Personal Access Tokens — scoped per-user API tokens replacing the shared org key — just landed this week, addressing a real security gap in the API access model.
◆ Where it's heading
The product is converging on a position as the CI context layer for AI coding agents. Each major feature — shareable failure links with a .md format for agent consumption, IDE extension with agent-fix flow, Linear integration for structured failure triage — points at the same thesis: that CI failure remediation will increasingly be handled by AI agents, and Currents wants to be the system those agents pull context from. The pricing restructure (self-serve Business plan, cheaper per-user rates) lowers the entry barrier for teams adopting this agent-augmented workflow.
◆ Prediction
The IDE extension will likely expand to support more agentic actions beyond 'fix failure' — expect quarantine, tagging, and re-run controls. The .md shareable context format will likely become a formal API surface with authentication options for enterprise use.
Nebula
2.5INFRA · APIS
Nebula closes a firewall bypass that let unparsed IPv6 protocols match TCP rules
◆ Current state
Nebula is a peer-to-peer mesh VPN built around a certificate authority model. v1.10.0 was the pivot — IPv6 and multiple addresses in the overlay, plus a v2 ASN.1 certificate format with a unified interface for external implementations — and everything since has been consequence management. v1.11.0 shifted to the operational surface with structured slog logging, corrected firewall reject-versus-drop semantics, and Windows WFP filters by default. v1.11.1 returns to the packet classifier: IPv6 packets whose next header Nebula does not parse were being misread as TCP or UDP and matched against TCP/UDP firewall rules, and are now classified as their true protocol with no ports.
◆ Where it's heading
The security findings since v1.10.0 map onto the same seam — the IPv6 support that release added widened what the classifier and the certificate validator have to handle, and each subsequent release has closed another gap in that widened surface. v1.11.1 is notable for making the fix a deliberate operational break: carrying SCTP, GRE or IP-in-IP over the overlay may have been working only through the bypass, so operators must add a proto: any rule before upgrading. That the project chose correct classification over compatibility, and said so plainly in the notes, is consistent with how the firewall direction fix was handled one release earlier.
◆ Prediction
The stated plan to assert low-s signature form when validating certificates remains the concrete next step visible in these entries; expect it as a breaking validation change. The classifier work suggests remaining IPv6 extension-header handling is the other likely source of findings.
Alternatives to Currents 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 Currents or Nebula.
ToolJet
ToolJet ships Custom Component Library and tightens enterprise controls on path to AI-native low-code.
GitHub
GitHub turns Copilot into an org-wide default, adds memory to agentic security fixes.
werf
werf's v3 dev track ships multi-namespace cleanup scanning and JSON config schemas in rapid succession
Buildkite
Buildkite ships a caching product with cache-poisoning controls baked in as it builds toward AI-agent-operated CI.
Jackett
Jackett ships daily tracker maintenance — domain fixes, new indexers, no architectural movement.
See all Currents alternatives → · See all Nebula alternatives →
Recent activity from Currents and Nebula
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 1d agoCurrents[New] Personal Access Tokens
- 17d agoCurrents[New] Shareable AI context for test failures ⚡
- 1mo agoNebulaIPv6 firewall bypass: unparsed protocols matched TCP/UDP rules
- 1mo agoCurrents[Improved] Better Slack notifications for CI test runs
- 1mo agoCurrents[Improved] New Pricing Plans
- 2mo agoNebulaBreaking: slog logging, corrected firewall reject/drop direction
- 2mo agoCurrents[New] Currents IDE Extension ⚡
- 2mo agoCurrents[New] Integration with Linear
- 7mo agoNebulaP256 signature malleability allowed blocklist bypass
- 8mo agoNebulaFix panic in use_system_route_table introduced by the previous release
- 8mo agoNebulaRoute-reload, handshake, and Windows listener fixes after the v1.10 rework
- 9mo agoNebulaIPv6 and multiple addresses in the overlay, plus a v2 certificate format ⚡
Frequently asked questions
What is the difference between Currents and Nebula?
They serve adjacent needs but don't currently overlap on shipped themes. Currents is currently shipping more aggressively (velocity 6.3 vs 2.5), with 1 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 Currents better than Nebula?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Currents is currently shipping more aggressively (velocity 6.3 vs 2.5), with 1 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 Currents?
Top Currents alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "Currents alternatives" section above for the current picks, or visit /alternatives/currents-dev 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.