8 Best Manifest Alternatives in 2026 (Open Source)
Manifest — Smart LLM Routing for OpenClaw. Cut Costs up to 70% 🦞🦚. Free, open-source, local-first LLM router with transparent scoring — vs OpenRouter which is a cloud proxy with 5% fee and no routing transparency
Short answer
- Closest match to Manifest: NadirClaw.
- Most actively developed: LiteLLM (13,238 commits in the last 90 days).
- Fastest growing: OmniRoute (+11,241 GitHub stars in the last 30 days).
- No commit in 6+ months: llm.ts and OpenLM.
These 8 open-source tools do the same job. They are ordered by how closely they match Manifest, with live GitHub data so you can see which projects are actively maintained.
| Tool | GitHub stars | Stars / 30d | Last commit | Downloads / 30d |
|---|---|---|---|---|
| Manifest(original) | 7.6k | +543 | 2026-10-03 | — |
| NadirClaw | 655 | +45 | 2026-10-02 | — |
| LiteLLM | 60.1k | +2,982 | 2026-10-03 | — |
| AI Gateway | 13.1k | +323 | 2026-05-25 | 1.9K |
| OmniRoute | 72.5k | +11,241 | 2026-10-02 | 232.6K |
| Bifrost AI Gateway | 8.5k | +830 | 2026-10-03 | — |
| TensorZero | 11.7k | +88 | 2026-06-04 | 37.0K |
| llm.ts | 213 | 0 | 2023-05-09 | — |
| OpenLM | 368 | 0 | 2023-05-19 | — |
1. NadirClaw
Open-source LLM router and cost optimizer with an OpenAI-compatible proxy
What sets it apart: Local-first LLM cost optimizer — classifies prompt complexity in 10ms and routes simple requests to 10-20x cheaper models, with no third-party proxy or middleman
Best for: Teams spending heavily on LLM APIs wanting 40-70% cost reduction; AI coding assistants (Claude Code, Cursor) with mixed complexity prompts; Budget-conscious developers using multiple LLM providers
2. LiteLLM
Open-source Python SDK and AI gateway for calling 100+ LLMs through a unified OpenAI-compatible interface
What sets it apart: Unlike OpenRouter (hosted-only routing), LiteLLM is self-hostable and provides a full gateway with per-user spend tracking, virtual keys, and A2A/MCP protocol support — making it the enterprise LLM traffic controller
Best for: ML platform teams managing multi-provider LLM access with centralized cost tracking and auth; Developers switching between LLM providers without changing application code
3. AI Gateway
A blazing fast AI Gateway with integrated guardrails. Route to 200+ LLMs, 50+ AI Guardrails with 1 fast & friendly API.
What sets it apart: vs LiteLLM: production-focused with guardrails, caching, and MCP Gateway; vs OpenRouter: self-hostable with enterprise governance and conditional routing rather than just model access
Best for: Teams using multiple LLM providers needing unified routing; Production AI apps requiring reliability (retries/fallbacks); Organizations wanting centralized LLM cost and access control
4. OmniRoute
OpenAI-compatible gateway for multi-provider routing, retries, fallbacks, caching, and observability
What sets it apart: It combines an OpenAI-compatible endpoint with broad provider routing, quota-aware failover, token compression, and a maintained free-tier catalog.
Best for: Developers building agents or coding workflows across multiple model providers; Teams seeking a single OpenAI-compatible endpoint with provider failover; Users managing multiple provider quotas and free tiers
5. Bifrost AI Gateway
Fastest enterprise AI gateway (50x faster than LiteLLM) with adaptive load balancer, cluster mode, guardrails, 1000+ models support & <100 µs overhead at 5k RPS.
What sets it apart: Fastest AI gateway with 11us overhead at 5k RPS — built in Go for extreme performance vs LiteLLM/Portkey's Python-based proxies
Best for: High-throughput production AI gateways needing sub-millisecond overhead; Multi-provider failover with zero-downtime requirements
6. TensorZero
TensorZero is an open-source LLMOps platform that unifies an LLM gateway, observability, evaluation, optimization, and experimentation.
What sets it apart: Only LLM gateway that combines inference, observability, evaluation, and optimization in one Rust-based system with data flywheel — vs LiteLLM (routing only) or Langfuse (observability only)
Best for: Teams wanting a unified LLM gateway with built-in optimization feedback loop; Production systems needing <1ms latency overhead at scale; Organizations wanting to continuously improve LLM performance from production data
7. llm.ts
Call any LLM with a single API. Zero dependencies.
What sets it apart: vs Vercel AI SDK / LangChain.js: zero-dependency TypeScript library under 10kB that sends prompts to 30+ models from 3 providers in a single call — optimized for lightweight multi-model comparison
Best for: Comparing outputs across multiple LLMs simultaneously in TypeScript; Lightweight multi-model evaluation without vendor lock-in; Browser-based LLM applications needing minimal bundle size
8. OpenLM
OpenAI-compatible Python client that can call any LLM
What sets it apart: vs LiteLLM / AI SDK: minimalist OpenAI-compatible drop-in replacement — swap openlm for openai in imports and instantly access HuggingFace and Cohere with zero API changes
Best for: Switching between LLM providers without code changes; Multi-model comparison using OpenAI-compatible interface; Lightweight provider abstraction for Python projects
FAQ
- What are the best alternatives to Manifest?
- The closest open-source alternatives to Manifest are NadirClaw, LiteLLM and AI Gateway, followed by OmniRoute, Bifrost AI Gateway and TensorZero. They are ranked by how closely they match what Manifest does.
- Which Manifest alternative is the most popular?
- OmniRoute has the most GitHub stars among Manifest alternatives, with 72,500 stars.
- Which Manifest alternative is the most actively maintained?
- By recent activity, LiteLLM (13,238 commits in the last 90 days) is the most actively developed alternative.