20 HarnessRouter alternatives
HarnessRouter: One API for agent harnesses — run Codex, Claude Code or Hermes behind your product with shared sessions, streaming, files and cost controls, and swap harness with a config change. 20 apps do similar work, most sharing Developers, API and Cost Optimization, ranked by how much they have in common with HarnessRouter.
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One API and one bill for hundreds of language models, with automatic failover between providers.
Also: API, Cost Optimization, Developers, LLM Gateway
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ngrok
A hosted LLM gateway from ngrok: one base URL and one key for public providers, your own keys and self-hosted models, with failover, scoped access and cost analytics.
Also: API, Cost Optimization, Developers, LLM Gateway
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An open-source proxy that sits between your coding agent and the model, compressing tool schemas, file reads and stale history to cut token bills.
Also: Coding Agent, Cost Optimization, Developers, LLM Gateway
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Privacy-first AI gateway putting 600+ models from 90+ providers behind one OpenAI-compatible API, with no prompt or output logging.
Also: API, Developers, LLM Gateway
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A memory layer for AI agents — remember user preferences and past interactions without stuffing the context window.
Also: API, Cost Optimization, Developers
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A coding agent tuned for latency: routes easy work to fast models, pulls only the code it needs, and fans out tool calls in parallel.
Also: Coding Agent, Cost Optimization, Developers
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Bruin Data Limited
Run Claude Code, Codex or OpenCode in the cloud from a single HTTP call — no SDK, no daemon, no infrastructure on your side.
Also: API, Coding Agent, Developers
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JetBrains s.r.o.
JetBrains' agent platform: run Claude Agent, Codex, Junie or Copilot in the cloud, then review every diff inside your IDE.
Also: Coding Agent, Cost Optimization
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Free, open-source local MCP gateway: register each server once, share it with every AI client, and cut tool-definition tokens by up to 91%.
Also: Cost Optimization, Developers
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Google
Google's browser workbench for prototyping with Gemini models, then shipping the same prompt as production API code.
Also: API, Developers
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You.com sells web search, content extraction, answer and research APIs for AI agents; its consumer chat closed to new users in 2026.
Also: API, Developers
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Stenography explains code and APIs with AI.
Also: API, Developers
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Lenz IO
Audit-grade fact-checking API for AI products — eight models across five stages, adversarial debate, and a full citation trail behind every verdict.
Also: API, Developers
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MeetStream AI
One API for meeting bots across Zoom, Google Meet, Teams and Webex — join, record, stream and speak in real time, billed at $0.35 an hour.
Also: API, Developers
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Inference, fine-tuning, and GPU clusters for open models — the full stack for teams building on open weights.
Also: API, Developers
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Run thousands of open models with one API call, and deploy your own without touching Kubernetes.
Also: API, Developers
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Inference on custom LPU hardware, built for latency — open models served at speeds general-purpose GPUs struggle to match.
Also: API, Developers
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Integration layer for AI agents: managed OAuth, 10,000+ prebuilt tools across 3,000+ APIs, an MCP server and an API proxy. Owned by Workday.
Also: API, Developers
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Armitage Labs OÜ
Merchant-of-record payments for AI and digital products: checkout, global tax, subscriptions, usage billing, affiliates and payouts at 3.9% + 40c, with an MCP server for agents.
Also: API, Developers
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Olostep Technologies, Inc.
One API to search, scrape, crawl, map and monitor the web, returning clean structured text that AI agents and RAG pipelines can use directly.
Also: API, Developers