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a2a cloud vs Railway

a2a cloud vs Railway for deploying AI agents

Railway is a genuinely delightful place to ship a web service or a database — push a repo, attach a plugin, and it's live. But an agent isn't just an app: it needs a database, an MCP server, auth, an audit trail, and scoped authority. a2a cloud bundles all of that and proves what the agent did.

Deploy an agentView architectureWhy not DIY?
primitivedatabaseagent surfacesinteropauthorityproof
honest take

Where Railway is genuinely strong — and where a2a cloud is different.

Railway is good at

Effortless PaaS developer experience

Railway has some of the best DX in the business: instant deploys from a repo, one-click Postgres and Redis plugins, clean environments, and pricing that scales with usage. For web apps, workers, and databases, it's a joy to use — and a fair default for general hosting.

a2a cloud adds

The agent runtime, not just the container

a2a cloud gives every agent a managed Postgres database, an MCP server, an OpenAPI gateway, a frontend, and auth from one `a2a deploy`. Authority is Ed25519-signed scoped grants — audience, TTL, file and tool scope — not shared secrets, and every run returns a signed, replayable receipt. A2A-native and MCP-native, so agents interoperate without glue code.

side-by-side

a2a cloud vs Railway, dimension by dimension.

A fair comparison. Both columns are accurate as we understand the products today — the difference is what the runtime owns by default.

dimension
Railway
a2a cloud
primitive
A service — a container built from your repo, plus plugins you attach. You own what runs inside.
A deployed agent — runtime, Postgres, MCP server, API, and frontend from one `a2a deploy`.
database
Add a Postgres plugin and wire the connection string yourself, per project.
A managed Postgres database per agent, provisioned automatically on deploy.
agent surfaces
None built in — you build the MCP server, API gateway, and agent auth on top.
MCP server, OpenAPI gateway, and auth ship with the deploy. Every agent tool is also an MCP tool.
interop
HTTP services you expose and integrate by hand — no agent protocol layer.
A2A-protocol native and MCP-native, callable from any agent or MCP client.
authority
Shared variables and secrets — broad, long-lived credentials the service holds.
Ed25519-signed scoped grants: audience, TTL, file and tool scope. No ambient production access.
proof
Deploy and application logs — mutable, no per-run signed evidence.
An Ed25519-signed, replayable receipt for every run.
how to choose

Pick the tool that matches the job.

Reach for Railway when

  • You're shipping a web service, worker, or database, not an agent.
  • You want the smoothest general-purpose PaaS deploy experience.
  • You're happy to build the MCP, auth, and audit layers yourself.

Reach for a2a cloud when

  • You need the full agent app — DB, MCP, API, frontend — in one deploy.
  • You want A2A and MCP interop without wiring it by hand.
  • You need scoped grants and signed receipts for governance and proof.
don't trust the agent

Trust the receipt.

a2a cloud deploys any agent — LangGraph, OpenAI Agents SDK, CrewAI, or custom — and ships it with a managed Postgres database, an MCP server, an API, a frontend, and an Ed25519-signed receipt for every run. Scoped grants, no ambient production access. One deploy, the whole agent app, with proof.

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