Grain vs Replit Agent

Quick answer

Replit bundles its own agent with hosting. The decision comes down to who owns the agent: you use Replit's agent, on Replit's credits, inside Replit's editor, while Grain publishes whatever your existing agent writes on your existing plan and keeps it published on the free tier after the session ends.

Fit first

What is different, verifiably

Where Replit Agent is better

• You do not have a coding agent subscription and do not want one. Replit bundles the agent, so the first app is a prompt away.
• You want to edit code by hand in the same tab. Replit is an editor first; Grain is not an editor.
• You want mobile access to the builder itself. Grain is a Mac app plus a CLI.
• You need one vendor for compliance or procurement reasons.

Where Grain is better

• You already pay for Claude Code, Codex or Cursor. Grain never marks up tokens, so there is no second agent bill.
• You want to keep the model and agent you trust. Replit's agent is Replit's choice.
• You do not want publication tied to Replit's credit and compute model. Grain separates the artifact's continuing URL from the agent subscription that created it.
• You publish more than Replit-style apps. Grain uses the same workspace flow for reports, walkthroughs, dashboards and scheduled jobs.
• You want readers to comment on the artifact where the agent can act on it.

Moving between them

1. From Replit to Grain: download or clone the repl to a local folder. Run grain init in that folder; it creates a workspace and writes MCP config for your agent. Have your agent adapt the app to a Postgres database if it used a Replit-specific store. Run grain push, grain checkpoint -m "import from replit", then grain share --public.
2. From Grain to Replit: run grain pull to fetch the artifact files, import the folder as a new repl, and point Replit's deployment at it. Scheduled jobs and comments do not carry over.

Choice rule

Choose Replit Agent

if you want a single vendor to supply the agent, the editor and the hosting, and you are fine paying credits for the agent's work.

Choose Grain

if you already run a CLI coding agent and want its output published on write, kept after the session, and shared with people who can comment on it.

Use both

if Replit is where you prototype by hand and Grain is where your CLI agent's finished work lives for the team.

Frequently asked questions