Replit Agent vs Claude Code vs Devin
All three write code, but they suit different starting points. Replit describes building apps from a natural-language request inside its own project environment. Claude Code is a terminal tool for changing a repository on your machine. Devin works in a cloud workspace with its own IDE, shell and browser. The first question is not which is smartest. It is whether you are starting something new or changing code you already run.
At a glance
| Question | Replit Agent | Claude Code | Devin |
|---|---|---|---|
| Where it runs | Replit project environment | Terminal/local workstation, with desktop/web options documented separately. | Cloud workspace; Devin CLI is a separate offering |
| Documented work | Writes code, sets up infrastructure and tests; Plan mode before changes; Checkpoints and rollback | Terminal coding workflow; Code migrations and bug fixes | Writes, runs and tests code; Embedded IDE, shell and browser |
| Review before changes | Plan mode permits review before code or data changes | Anthropic says terminal Claude Code asks permission before changing files or running commands; configured modes and integrations still need review. | Documentation shows IDE takeover and an interactive browser |
| Price as published | Usage-based billing; no single price verified | From $20/month (Pro, per Anthropic pricing page); usage limits apply | Free (limited); Pro $20/month; Max $200/month; Teams from $80/month minimum |
| Best fit (vendor-documented) | Building apps and related artifacts from natural-language requests. | Developers delegating repository changes from a terminal. | Engineering teams delegating well-scoped, verifiable tickets. |
| Poor fit | Assuming a prototype is production-ready without review. | A no-setup personal assistant for errands. | Hard-to-verify projects with no completion criteria. |
| Limits noted | Deployments and model usage can add charges; total unknown | Model benchmarks do not establish product performance; Do not treat local-terminal controls as proof of web/desktop behaviour. | Vendor explicitly says documentation may be out of date |
Sources: Replit Agent docs, Replit billing, Claude Code, Claude pricing, Devin docs, Devin billing. Plans and prices change, so confirm on the vendor page.
Greenfield app or existing repository?
Starting a new app
Replit's docs describe Agent writing code, setting up infrastructure and testing inside a Replit project, with a Plan mode that lets you review before changes and checkpoints you can roll back to. That makes it the one of the three documented around building something from a blank page. Its own caution applies: do not assume a prototype is production-ready without review.
Changing code you already run
Anthropic documents Claude Code as a terminal workflow, including code migrations and bug fixes, and says the terminal version asks permission before changing files or running commands. Cognition describes Devin as writing, running and testing code in a cloud workspace where you can take over the IDE and browser, and its page suggests well-scoped, verifiable tickets. For an existing repository, run the same small task on each and compare the diffs and your review time. See our Claude Code vs Devin guide for a reproducible evaluation brief.
What it costs, as published
- Replit Agent: Replit's billing docs describe effort-based usage billing, where every Agent interaction can be billable, including guidance and Plan mode. Deployments and model usage can add charges, and we could not establish a total.
- Claude Code: Anthropic's pricing page lists Pro at $20 a month ($200 billed annually) and Max from $100 a month, and Console API usage is billed by tokens. Usage limits apply.
- Devin: Devin's docs list Free (limited), Pro at $20 a month, Max at $200 a month and Teams with an $80 a month minimum. Paid quotas and on-demand credits apply, and the billing and pricing pages describe Teams seats differently, so get a team quote.
All figures are in USD as published by each vendor and checked 1 October 2026. See free AI agents for what each free tier covers.
How to test them yourself
- Pick one small task with a clear pass/fail, such as adding a field to a form and a test for it.
- Give each agent the same repository snapshot, or the same prompt for a new app.
- Record time to first working result, number of corrections you made and what you had to review.
- Check what each charged, including usage beyond any plan allowance.
- Repeat once. A single run proves little.
What this guide does not say
It does not rank the three or claim any is faster or more accurate. Vendor benchmarks, including those Cognition and Anthropic publish for models, do not establish how a product performs on your code. We have not tested these tools. Read the records for Replit Agent, Claude Code and Devin, the coding use case and the approval checklist.