AI Agents Compared: Which Ones Actually Work Without You Watching
Devin, Claude Code, GitHub Copilot's coding agent, Manus, and Lindy compared on how much supervision each one genuinely needs — and where 'autonomous' still means 'check back in an hour,' not 'walk away.'
AI Agents Compared: Which Ones Actually Work Without You Watching
“AI agent” gets used for everything from a slightly smarter chatbot to something that genuinely writes, tests, and ships code on its own. Here’s the real distinction: which ones can actually be assigned a task and left alone, and which still need you hovering the whole time.
The quick comparison
| Agent | Domain | Supervision level |
|---|---|---|
| Devin | Coding | Assign a ticket, check back later |
| Claude Code | Coding | Supervised, terminal-based, multi-step |
| GitHub Copilot (coding agent) | Coding | Hand it an issue, returns a draft PR |
| Manus | General-purpose automation | Runs async on its own cloud compute |
| Lindy AI | Business workflows | Email, scheduling, CRM — ongoing |
| Code With Us Unlimited | Non-developers, desktop control | Runs on your own machine, plain-English prompts |
What actually makes something an “agent”
A chatbot answers one message and waits. An agent plans a multi-step task, executes it, checks its own work, and keeps going — writing code, calling APIs, browsing, updating records — without you re-prompting at every step. That’s the real dividing line worth using when you evaluate a tool’s “agent” claim, not the marketing copy.
Devin — assign it and walk away
Devin is built specifically around the “assign a ticket, check back later” workflow — closer to handing work to a junior engineer than typing prompts into a chat window. It represents the most hands-off end of the coding-agent spectrum currently available.
Claude Code — supervised, but genuinely agentic
Claude Code runs from your terminal and plans/executes multi-step coding tasks, but it’s built around a supervised workflow rather than pure fire-and-forget — you’re meant to review its steps as it works through a real task, not disappear for a day.
GitHub Copilot’s coding agent — the production-ready middle ground
This is a distinct feature from Copilot’s familiar autocomplete: hand it an actual GitHub issue, and it returns a draft pull request on its own. For teams already living inside GitHub, this is currently one of the most production-ready “assign work to an AI” flows available — it fits directly into a review process your team already has.
Manus and Genspark — the furthest into async execution
For general-purpose (non-coding) automation, Manus and Genspark push the furthest toward genuinely hands-off execution — running a task on their own cloud compute while you do something else entirely, then reporting back. This is the closest thing on this list to “walk away and come back to a finished result” for tasks outside of code.
Lindy AI — for business workflows, not code
If your bottleneck is administrative rather than technical — email triage, scheduling, CRM updates, internal coordination — Lindy is the more relevant comparison than any coding agent here. It’s built around ongoing business operations rather than one-off tasks.
Code With Us Unlimited — desktop control without writing a prompt like a developer
Every agent above assumes some technical comfort — a GitHub issue, a terminal, a CRM setup. Code With Us Unlimited is aimed squarely at the gap: plain-English instructions that drive your actual desktop — opening apps, browsing, organizing files, writing and fixing code — running on your own machine rather than a hosted service. It fits the same “agent, not chatbot” definition above (it plans, executes, and continues without a re-prompt each step), the differentiator is who it’s built for: someone who wants that without becoming a developer first.
The honest caveat that applies to all of them
Agent reliability in 2026 is genuinely good, not flawless — and every serious deployment, including enterprise ones, still keeps a human in the loop for anything with real consequences. “Autonomous” in practice means “needs less supervision than a chatbot,” not “never check its work.” Start any of these on something real but low-stakes — a script, a small automation, a first-pass PR — before trusting one with anything customer-facing or financially sensitive.
The bottom line
Devin and the async general-purpose agents (Manus, Genspark) sit furthest toward true hands-off execution; Claude Code and Copilot’s coding agent are the supervised-but-genuinely-agentic middle ground most teams actually want today; Lindy covers the business-operations side entirely separately from code; and Code With Us Unlimited is the pick if you want desktop-level control without a developer’s toolkit to start. None of them are “set and forget” for anything that matters — that’s not a limitation to wait out, it’s the correct way to use all of them right now.
Sources: minami.ai, toolcenter.ai, blaxel.ai