Comparison

PromptShip vs E2B + Neon + Fly

Teams shipping agent products often stitch this stack together: E2B for code-execution sandboxes, Neon for branchable Postgres, Fly for app hosting. All three are excellent at what they do. The cost is the stitching: three APIs, three auth models, and glue code you own to move an agent's work from sandbox to database to deployment. PromptShip is a deployment platform that gives agents the whole environment as one primitive: app, database, and cache together, with clone, promote, and rollback as platform operations.

PromptShip operates its own platform layer, it is not a wrapper around Cloud Run, Vercel, Render, or any other PaaS. Its comparison set is Cloud Run, Fly, Railway, and Vercel.

Stack comparison

	PromptShip	E2B + Neon + Fly
Isolated full-stack env (app + Postgres + cache)	✓	Sandbox + branch + app, wired together by you
Clone an environment with its data in one step	One call · rolling out in open beta	Neon branches Postgres; sandbox and app state live elsewhere
Promote to production with instant rollback	Rolling out in open beta	Fly deploys + your own promotion scripts
Sleep at $0, wake on request	Rolling out in open beta	Per product: Fly autostop, Neon scale-to-zero, configured separately
One MCP surface for agents	✓	Three APIs, three auth models
Per-agent identity + one action ledger across the stack	Rolling out in open beta	Attribution split across three audit logs
One vendor, one bill	✓	✕
Multi-region deploys	✕	Fly: yes

When the stitched stack is the right choice

• You need Fly's multi-region deployment with anycast routing.
• You only need code-execution sandboxes. E2B is great at exactly that.
• Your workflows are already built around Neon's Postgres branching.
• You want best-of-breed control over every layer and are happy to own the glue.

When PromptShip is the right choice

• Your agents operate whole environments, not just code execution.
• You need an environment and its data cloned together, not per-product snapshots.
• You want promotion, rollback, and attribution as platform primitives, not scripts.
• You want one MCP server in the IDE instead of three integrations.

One platform for your agents

Full-stack environments with real data, promote with rollback, and one action ledger. Free during early access.

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Already have access? Install the MCP:

$ claude mcp add --transport http promptship https://mcp.promptship.dev/mcp