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Comparison · DevOps
Fiber vs Rivet
A side-by-side editorial comparison of Fiber and Rivet — release velocity, themes, recent moves, and the top alternatives to consider.
Fiber vs Rivet: at a glance
| Feature | Fiber | Rivet |
|---|---|---|
| Sector | DevOps | DevOps |
| Velocity score | 2.5 | 7.5 |
| Sparks · 30d | 0 | 3 |
| Top themes | go, web-framework, deprecation, v3-migration | actors, ai agents, sqlite, forking |
| Last editorial update | 11d ago | 2d ago |
| Website | Visit → | — |
What is Fiber?
Fiber marks its v2 module deprecated in favour of v3
Fiber's v2 line has been on narrow maintenance for months: lock cleanup, an X-Real-IP backport, HTML escaping, a CVE patch. v2.52.16 formally marks the fiber/v2 module as deprecated in favour of v3 and fixes CORS wildcard origins that accepted empty subdomain labels. The v3 line, last visible in this feed at rc.3, carries native net/http and fasthttp handler support and Express-style handlers.
What is Rivet?
Rivet Actors can now fork in 20 ms, SQLite database included, without copying data.
Rivet builds infrastructure for long-lived actors and AI agents: BYOC, OpenTelemetry tracing, actor-scoped JWTs and agentOS Hosted VMs. The 3.0 Preview made Rivet a single stateless binary on S3, and the Rust SDK reached general availability on 6 November. On 11 November Rivet added actor forking: a fork starts in 20 ms with the original actor's state and SQLite database and costs nothing until it writes.
Fiber vs Rivet: editorial side-by-side
Fiber
2.5DEVOPS
Fiber marks its v2 module deprecated in favour of v3
◆ Current state
Fiber's v2 line has been on narrow maintenance for months: lock cleanup, an X-Real-IP backport, HTML escaping, a CVE patch. v2.52.16 formally marks the fiber/v2 module as deprecated in favour of v3 and fixes CORS wildcard origins that accepted empty subdomain labels. The v3 line, last visible in this feed at rc.3, carries native net/http and fasthttp handler support and Express-style handlers.
◆ Where it's heading
The deprecation notice tells v2 users to plan their move. With v2 patches shrinking to one or two pull requests, active development sits entirely on v3.
◆ Prediction
Further v2 releases are likely to be security fixes only; the feed does not show v3's current state past rc.3.
Rivet
7.5DEVOPS
Rivet Actors can now fork in 20 ms, SQLite database included, without copying data.
◆ Current state
Rivet builds infrastructure for long-lived actors and AI agents: BYOC, OpenTelemetry tracing, actor-scoped JWTs and agentOS Hosted VMs. The 3.0 Preview made Rivet a single stateless binary on S3, and the Rust SDK reached general availability on 6 November. On 11 November Rivet added actor forking: a fork starts in 20 ms with the original actor's state and SQLite database and costs nothing until it writes.
◆ Where it's heading
Rivet keeps turning its S3-backed storage engine into features for agent workloads. Copy-on-write forking follows from the 3.0 storage design and gives agents a cheap way to branch a session, try something and discard it. The SDK and auth work of the past two months points to Rivet positioning actors as the runtime for agent backends.
◆ Prediction
Forking is likely to show up next in agentOS and the Pi integrations as a way to branch agent runs; the entries do not say when 3.0 leaves preview.
Alternatives to Fiber and Rivet
Other DevOps 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 Fiber or Rivet.
Appsmith
Appsmith 2.7 makes its MCP agent ask before deleting widgets and blocks stale edits.
Apache Arrow Rust
Arrow Rust cuts release candidates on three older lines at once.
Sanity
Sanity's MCP server now explains failed validations and stops skipping them.
GitHub
GitHub sets a December 8 cutoff for ARM32 Actions runners and opens AI Scan to the API.
Manticore Search
Manticore keeps patching 31.x, now fixing a FREEZE crash and a DocID ordering bug.
Recent activity from Fiber and Rivet
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 2d agoRivetIntroducing OpenOrange: Run Cloudflare Workers Anywhere ⚡
- 3d agoRivetIntroducing Actor Forking for SQLite ⚡
- 8d agoRivetRust SDK for Rivet Actors Is Now Generally Available
- 19d agoRivetIntroducing Rivet 3.0 Preview ⚡
- 22d agoFiberFiber v2.52.16 deprecates the v2 module and tightens CORS
- 1mo agoRivetIntroducing agentOS 0.4 & Hosted VMs
- 1mo agoRivetIntroducing Pi Durable for Rivet
- 3mo agoFiberIdempotency middleware releases MemoryLock keys on unlock
- 4mo agoFiberX-Real-IP overwrite fix backported to v2
- 6mo agoFiberCtx.Format now escapes HTML output
- 8mo agoFiberSecurity patch for GHSA-mrq8-rjmw-wpq3
- 9mo agoFiberMount improvements and limiter middleware fixes
Frequently asked questions
What is the difference between Fiber and Rivet?
They serve adjacent needs but don't currently overlap on shipped themes. Rivet is currently shipping more aggressively (velocity 7.5 vs 2.5), with 3 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 Fiber better than Rivet?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Rivet is currently shipping more aggressively (velocity 7.5 vs 2.5), with 3 editorial sparks in the last 30 days against 0. For your specific use case, the alternatives sections above list other DevOps products to evaluate alongside.
What are the best alternatives to Fiber?
Top Fiber alternatives in DevOps are ranked by recent ship velocity. Browse the "Fiber alternatives" section above for the current picks, or visit /alternatives/fiber for the full list with editorial commentary on each.
What are the best alternatives to Rivet?
Top Rivet alternatives in DevOps are ranked by recent ship velocity. Browse the "Rivet alternatives" section above for the current picks, or visit /alternatives/rivet for the full list with editorial commentary on each.