💻 Developer Tools

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.'

By bla5k 4 min read

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

AgentDomainSupervision level
DevinCodingAssign a ticket, check back later
Claude CodeCodingSupervised, terminal-based, multi-step
GitHub Copilot (coding agent)CodingHand it an issue, returns a draft PR
ManusGeneral-purpose automationRuns async on its own cloud compute
Lindy AIBusiness workflowsEmail, scheduling, CRM — ongoing
Code With Us UnlimitedNon-developers, desktop controlRuns 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

← All guides