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LowRouter vs Mastra
Mastra is a TypeScript framework for building AI agents; LowRouter provides the routing layer for any agent.
LowRouterSovereign, carbon-aware AI routing for your agents, with one bill in euros
MastraTypeScript framework for AI agentsWhich to pick
Pick LowRouter if you want…
- EU-sovereign, carbon-transparent LLM routing
- Integrations with LangChain, CrewAI or Vercel AI SDK (on LowRouter's list, not Mastra's)
Pick Mastra if you want…
- Typed AI agents with built-in observability
- AI agent framework
- A free plan to start with (Starter)
- Open-source code (mastra-ai/mastra on GitHub)
- Integrations with React, Next.js or Node (on Mastra's list, not LowRouter's)
Side by side
- What it is
- LowRouter:LowRouter is an EU-hosted proxy that routes OpenAI-compatible requests to multiple LLM providers, showing cost and carbon emissions per call.
- Mastra:Mastra is an open-source TypeScript framework for building AI agents with memory, tools, workflows and observability.
- Best for
- LowRouter:EU-sovereign, carbon-transparent LLM routing
- Mastra:Typed AI agents with built-in observability
- Who it’s for
- LowRouter:Developers building AI agents or apps who need sovereign, carbon-aware routing and unified billing.
- Mastra:TypeScript developers building AI-powered applications and agents.
- Pricing
- LowRouter:Paid
- Mastra:Freemium
- Plans
- LowRouter:—
- Mastra:Starter $0 per month · Teams $250 per month
- Open source
- LowRouter:—
- Mastra:Yes, 28,481 GitHub stars
- Works with
- LowRouter:LangChain, CrewAI, Vercel AI SDK, n8n, Claude Code, OpenCode, Goose, Aider
- Mastra:React, Next.js, Node, LibSQL, Postgres, Vite
LowRouter features
- Single OpenAI-compatible endpoint. Point any OpenAI-compatible SDK to LowRouter and access 40+ providers with one API key.
- Carbon receipt per request. Each response includes provider, region, gCO₂eq emitted and grid carbon intensity.
- Auto-routing policies. Define rules (e.g., lowest carbon, lowest cost, EU-only) and LowRouter selects the optimal provider.
- Alias management. Create model aliases that can be repointed to different providers or regions without code changes.
- Failover handling. In automatic mode failed requests are rerouted to another provider to keep runs alive.
- Unified EU VAT invoice. All usage across providers is billed on a single euro-denominated invoice.
- Exportable usage reports. Dashboard provides CSV export of tokens, cost and emissions for finance and ESG reporting.
- No prompt retention. LowRouter never stores or trains on your prompts; only metadata for billing is kept.
Mastra features
- Typed Agents. Define agents with instructions, models, tools and runtime behavior in TypeScript.
- Workflows. Compose multi-step, retryable, branchable workflows with typed control flow.
- Harness. Coordinate multi-mode agents with shared state, threads and storage.
- Memory. Durable observational memory with semantic recall and thread-aware storage.
- Observability. Logs, metrics, traces, datasets and signals for full runtime insight.
- Server & Studio. Run agents locally or in Mastra Cloud and manage them via a web studio.
LowRouter vs Mastra FAQ
Is LowRouter or Mastra free?+
LowRouter is paid, with a free trial. Mastra has a free plan (Starter); paid plans start at $250/month (Teams).
Is LowRouter or Mastra open source?+
Mastra is open source (mastra-ai/mastra on GitHub). DevHunt has no public source repository on record for LowRouter.
Do LowRouter and Mastra integrate with the same tools?+
Their integration lists don't overlap: LowRouter lists LangChain, CrewAI, Vercel AI SDK, n8n and 5 more; Mastra lists React, Next.js, Node, LibSQL and 2 more.
On DevHunt
Based on each tool's website and DevHunt data. Details may change; check the official sites.