Mastra vs OpenCode (2026)

Mastra

by Mastra (ex-Gatsby team)

OpenCode

by Anomaly Innovations, Inc

Pros

• ✓TypeScript-native framework rather than a Python-first port. Designed from scratch for the TS/JS ecosystem with full IDE autocomplete, Zod schema validation, and deep integration with Next.js, React, Express, and Hono. Meaningful advantage for web developers who do not want to learn Python to ship production agents.
• ✓Model router connects to 40+ providers (OpenAI, Anthropic, Google, DeepSeek, Groq, Mistral, xAI, Bedrock, Azure, Ollama, OpenRouter, Vercel) through one standard interface with automatic fallbacks. Broader provider coverage than LangChain's JS port and dramatically simpler than wiring providers manually.
• ✓Strong adoption signals demonstrate production readiness. 28.9k GitHub stars, $13M YC seed funding, v1.0 in January 2026, and published case studies with Replit, Salesforce, Sanity, SoftBank, Factorial, WorkOS and Plaid confirm it is meaningfully more battle-tested than newer agent frameworks.

Limitations

• –TypeScript-only by design with no Python support. The team views this as a feature, but Python-first teams committed to LangChain, CrewAI, or AutoGen workflows cannot use Mastra without rewriting in TypeScript. Not appropriate for data science or ML teams already standardized on the Python ecosystem.
• –Regulated data is contractually out of scope on the standard terms. Mastra holds SOC 2 Type II but publishes no ISO 27001, and its agreement prohibits submitting protected health information under HIPAA, cardholder data under PCI DSS, or Gramm-Leach-Bliley financial data unless separately agreed in an order form.
• –Enterprise features (RBAC, SSO, ACL) require paid Mastra Cloud or a commercial license. The Teams plan at $250/month adds SSO and SOC 2 documentation, and the Enterprise tier is quote-only on both the hosted and self-hosted surfaces. Only monthly rates are published, with no annual option.

Pros

• ✓Developers can log in with GitHub Copilot or ChatGPT Plus or Pro to reuse existing subscription quotas, or connect any of 75+ providers including local models, with no separate API billing required.
• ✓Multi-session parallel agents run on the same project, and MCP client support covers local and remote servers with OAuth, so tools such as Sentry and Context7 connect inside the same workflow.
• ✓No code or context is stored, the agent is MIT licensed, and Anomaly Innovations publishes a SOC 2 Type 2 report through its Trust Center.

Limitations

• –Permissions start permissive: the Build agent edits files and runs shell commands without an approval prompt until a permission config is written, with only repeated identical calls and paths outside the project gated.
• –Model access is separate from the free agent, so developers pay a provider directly or through Go or Zen, and manage keys and accounts for each provider they use.
• –Enterprise per-seat pricing is quote-only, and the SOC 2 report and Data Processing Agreement are released through the Trust Center on request.