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Comparison · DevOps
Rivet vs Stirling-PDF
A side-by-side editorial comparison of Rivet and Stirling-PDF — release velocity, themes, recent moves, and the top alternatives to consider.
Rivet vs Stirling-PDF: at a glance
| Feature | Rivet | Stirling-PDF |
|---|---|---|
| Sector | DevOps | DevOps |
| Velocity score | 6.3 | 6.3 |
| Sparks · 30d | 1 | 1 |
| Top themes | actors, serverless, developer-infra, rust | mcp, ai-document-tools, self-hosted, performance |
| Last editorial update | 2d ago | 16h ago |
| Website | — | Visit → |
What is Rivet?
Rivet is graduating from an actor library into a managed serverless platform.
Rivet ships at a rapid clip around its actor model: a managed serverless hosting product (Rivet Compute), new first-class SDKs (Rust, Effect) on top of the existing TypeScript surface, and a native Rust rewrite of its core (Rivet 2.3, RivetKit). Earlier work, agentOS and per-actor SQLite/queues/workflows, points the actor primitive squarely at AI-agent and durable-execution use cases.
What is Stirling-PDF?
Stirling-PDF layers MCP and metered AI tools onto its OSS PDF utility, plus a SaaS tier.
Stirling-PDF is shipping fast on its V2 line. The last month splits between heavy engineering — JDK 25 enforcement, a new JPDFium path cutting merge/split memory use by up to 99%, server-side folder storage, desktop multi-window — and a newer direction: an MCP integration page plus pay-as-you-go AI document tools, with stirling.com's SaaS code now folded into the OSS repo. A reworked file-management UI (files left, tools right) addresses long-standing complaints about V2's 'forced file management.' Releases are frequent and several are explicitly flagged WIP.
Rivet vs Stirling-PDF: editorial side-by-side
Rivet
6.3DEVOPS
Rivet is graduating from an actor library into a managed serverless platform.
◆ Current state
Rivet ships at a rapid clip around its actor model: a managed serverless hosting product (Rivet Compute), new first-class SDKs (Rust, Effect) on top of the existing TypeScript surface, and a native Rust rewrite of its core (Rivet 2.3, RivetKit). Earlier work, agentOS and per-actor SQLite/queues/workflows, points the actor primitive squarely at AI-agent and durable-execution use cases.
◆ Where it's heading
The product is moving up the stack from a self-hosted library toward an opinionated platform: own the runtime (Rust rewrites), broaden the language surface (Rust and Effect SDKs), and capture deployment with single-command managed hosting. agentOS signals the target workload is AI agents needing cheap, fast-cold-start isolation.
◆ Prediction
Expect the Compute platform to deepen, billing, autoscaling, and regions, and more SDKs or agent-oriented primitives that make Rivet the default place to run actor-based agent backends.
Stirling-PDF
6.3DEVOPS
Stirling-PDF layers MCP and metered AI tools onto its OSS PDF utility, plus a SaaS tier.
◆ Current state
Stirling-PDF is shipping fast on its V2 line. The last month splits between heavy engineering — JDK 25 enforcement, a new JPDFium path cutting merge/split memory use by up to 99%, server-side folder storage, desktop multi-window — and a newer direction: an MCP integration page plus pay-as-you-go AI document tools, with stirling.com's SaaS code now folded into the OSS repo. A reworked file-management UI (files left, tools right) addresses long-standing complaints about V2's 'forced file management.' Releases are frequent and several are explicitly flagged WIP.
◆ Where it's heading
Two arcs are visible in the entries. One is performance and desktop maturity: memory, JDK, multi-window, an auto-updater. The other, newer one is monetizable AI — an MCP page and PAYG-gated AI document and 'AI Create' tools, alongside a SaaS/OSS split the team says it will clarify in coming releases. Stirling-PDF is positioning to be both a self-hosted utility and a hosted, AI-assisted service.
◆ Prediction
Expect the MCP page and AI document tools to move from WIP toward shipped, billed features, and clearer OSS-vs-SaaS release notes as the team separates the two products.
Alternatives to Rivet and Stirling-PDF
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 Rivet or Stirling-PDF.
FusionAuth
An auth platform in a hardening cycle, tightening API scope and adding OAuth standards
Sanity
Highest-cadence shipper in view, with agent tooling now a parallel track to the editor
HashiCorp
HashiCorp is re-tooling its entire stack for agent-driven infrastructure.
Kubernetes
Kubernetes is rebuilding its core scheduling and hardware model around AI workloads.
GitHub
GitHub ships steady Copilot, Dependabot, and Enterprise-security increments — no single directional move this window.
See all Rivet alternatives → · See all Stirling-PDF alternatives →
Recent activity from Rivet and Stirling-PDF
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 18h agoStirling-PDF2.13.2 Desktop performance fix, and security fixes
- 5d agoStirling-PDF2.13.1 bug fixes for desktop upload from mobile and multitool rotations
- 6d agoStirling-PDF2.13.0 MCP, files UI tweaks and bug fixes ⚡
- 6d agoRivetSecure Exec v0.3
- 8d agoRivetIntroducing the Rust SDK for Rivet Actors
- 8d agoRivetIntroducing Rivet Compute ⚡
- 9d agoRivetIntroducing the Effect SDK for Rivet Actors
- 10d agoRivetIntroducing Rivet 2.3
- 15d agoStirling-PDF2.12.0 JDK25, Folder storage, Huge memory improvements for merge and lots more
- 22d agoStirling-PDF2.12 pre relase test - dont use
- 1mo agoRivetDashboard Redesign
- 1mo agoStirling-PDF2.11.0 New easy file management UI release
Frequently asked questions
What is the difference between Rivet and Stirling-PDF?
They serve adjacent needs but don't currently overlap on shipped themes. Rivet and Stirling-PDF are shipping at a similar cadence (velocity 6.3 vs 6.3, 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 Rivet better than Stirling-PDF?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Rivet and Stirling-PDF are shipping at a similar cadence (velocity 6.3 vs 6.3, both within Sparkpulse's "active" band). For your specific use case, the alternatives sections above list other DevOps products to evaluate alongside.
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.
What are the best alternatives to Stirling-PDF?
Top Stirling-PDF alternatives in DevOps are ranked by recent ship velocity. Browse the "Stirling-PDF alternatives" section above for the current picks, or visit /alternatives/stirling-pdf for the full list with editorial commentary on each.