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Routing tools

4 reviewed tools: 4 free or open source.

Order: free and open source first, then hosted products with a real free tier, then paid-led; catalog order inside each group, with quiet or archived repos last. Not a score, and no tool pays for its place.

4 tools

  • SvelteKitMIT full-stack Svelte framework

    Free / OSS · OSS/MIT · 20.9k GitHub stars

    VerdictMIT Svelte full-stack. Free forever; Remix/Hydrogen are React cousins.

    CatchVs Remix/Hydrogen: full-stack Svelte lane. Ecosystem and hiring pool smaller than React/Next. Not Shopify Hydrogen commerce defaults. You still pick auth/data.

  • Weave RouterELv2 on-box embedder proxy that routes each prompt to the right model

    Free / OSS · Open-Core · 5.6k GitHub stars

    VerdictELv2 source-available model router. Strong cost lever for agent fleets; no managed offering without a license review.

    CatchElastic License 2.0 is source-available, not OSI open-source — you may not offer Weave Router as a hosted/managed service under ELv2 without permission. Vs LiteLLM: LiteLLM is the broader multi-provider gateway/SDK; Weave Router's wedge is per-prompt model selection via on-box embeddings. Routing quality still depends on your traffic mix and evaluation.

  • NasikoApache-2.0 developer control plane — discover, route, and trace agent harnesses

    Free / OSS · Apache-2.0 · 9.5k GitHub stars

    VerdictApache harness control plane when you need discover/route/trace over many coding agents — not Paperclip budgets, not Zeron device sync.

    CatchVs Paperclip / Zeron / ECC: Paperclip is Board/budget company OS; Zeron is multi-device session drive; ECC is skills/memory/security pack — Nasiko’s catch is harness discovery + routing/trace control plane. Still early operator UX; confirm which harnesses are first-class before you bet a fleet on it.

  • Claude Code RouterMIT local control plane — route coding agents across models

    Free / OSS · OSS/MIT · 37.7k GitHub stars

    VerdictMIT local agent model router when you want CCR’s gateway/UI — not Weave ELv2, not HarnessRouter; install `@musistudio/claude-code-router` only.

    Catch★37492 in about 83 weeks (~451 a week): judge it on the router/gateway loop, not the star count. Vs weave-router / harnessrouter: Weave is ELv2 on-box embedder/prompt routing; HarnessRouter CE is an Apache unified API over coding harnesses — CCR’s catch is a local Claude-Code-oriented model router gateway + UI. Pin the scoped `@musistudio/` package name; bare npm name is a different project.

FAQ

What is the top free pick among Routing tools?
SvelteKit leads the Stack Gems list for Routing tools. Verdict: MIT Svelte full-stack. Free forever; Remix/Hydrogen are React cousins.
How many Routing tools does Stack Gems review?
4: 4 free or open source. Each review has a verdict and an honest Catch; no tool pays for its spot.
Which Routing tools can I self-host for free?
SvelteKit, Nasiko and Claude Code Router.
Which Routing tools have the most GitHub stars?
Claude Code Router (37.7k), SvelteKit (20.9k), Nasiko (9.5k), per GitHub on 2026-10-19. Stars measure attention, not fit; read the Catch.
What is the catch with SvelteKit?
Vs Remix/Hydrogen: full-stack Svelte lane.

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