Legioni vs QALens

Legioni and QALens are both coding assistants tracked by AIDiveForge. Below is a side-by-side comparison of pricing, capabilities, platforms, and ownership — sourced from each tool's live website and verified before publishing.

Legioni

The orchestrator receives a plain-language task in opencode, breaks it down, and hands it to a chain of specialist agents — architect, implementer, reviewer, test-strategist — in sequence. Each step feeds the next; the loop closes only when tests pass. The 'lesson promotion' mechanism lets teams encode what they learn into persistent agent behavior, so the same mistake doesn't resurface two projects later. The hard boundary: Legioni runs inside opencode, full stop. If your team is not already on opencode or cannot adopt it, the architecture is irrelevant — there is no standalone path and no API to route through a different runtime.

QALens

The core workflow is one input, one output: paste a GitHub URL, upload a screenshot, or describe a change in plain text, and QALens returns categorized test cases with risk confidence levels and an explanation of why each risk matters. The example output on the vendor's page shows it surfacing a race condition between a concurrent address PUT and a session refresh — the kind of backend regression that passes unit tests and surfaces in production. The free tier caps at three analyses per month and 200 lines per diff or 3,000 characters, which covers small PRs but excludes most real-world feature branches. Saving checklists, connecting Bitbucket, and analyzing pull requests automatically are all paid-only features. Teams doing high-volume PR review will hit the free ceiling inside a single sprint.

Attribute	Legioni	QALens
Pricing	Free	Paid
Free trial	No	No
Open source	Yes	No
Has API	No	No
Self-hosted option	Yes	No
Platforms	npm, Node.js	Web-based (browser)
Pros	Test-driven agent loop closes only when tests pass, so you are not manually checking whether the implementer's output actually works before shipping it to review. Specialist agents handle discrete roles — architecture, implementation, review, test strategy — which means a single task does not collapse into one undifferentiated prompt that loses track of constraints halfway through. Lesson promotion persists learned behaviors across sessions and projects, so teams stop re-encoding the same project rules every time they open a new task. Zero-install path via npx means you can run `legioni init` in a new repo without touching your global Node environment, keeping adoption friction low for the first experiment. MIT license and self-hosted operation mean the agents run entirely within your environment — no usage data leaves to a vendor API beyond whatever opencode itself sends.	Fetches diffs directly from a pasted GitHub URL, so reviewers skip the copy-paste step and get to the checklist faster — without this, the friction of extracting a raw diff is enough that many reviewers skip the process entirely. Risk tiers and confidence levels are attached to each test scenario, which means reviewers can triage where to spend testing time rather than treating every checklist item as equally urgent. Flags edge cases that cross multiple concerns in the same change — the vendor's own example catches a stale payment token race condition that unit tests miss — reducing the class of regressions that reach production undetected. Accepts plain-text descriptions and screenshots in addition to diffs, so product managers and non-engineering stakeholders can generate test scenarios from a UI bug report without needing to read code. Processes input and surfaces an editable summary before generating the checklist, which means ambiguous inputs get a human confirmation step rather than silently producing a checklist based on a misread change.
Cons	Legioni is a hard dependency on opencode: every agent, every loop, every lesson runs inside opencode's runtime. Teams on Cursor, Cline, or any other AI coding environment cannot use this tool — the only path forward is adopting opencode first, which is a separate adoption decision with its own trade-offs. The project's public repository shows five commits and a small star count, which means edge cases in the agent loop, lesson promotion conflicts, and stack detection failures are under-documented and under-reported. Teams hitting unexpected behavior have no community issue history to search and no support channel beyond filing a GitHub issue themselves. Lesson promotion is a manual, explicit action — the agents do not automatically surface or apply learned behaviors without team intervention. Projects where nobody curates the promoted lessons see no compounding benefit across sessions, which makes the core differentiating feature opt-in rather than default.	The free tier caps at 200 lines per diff and 3,000 characters per input — a single mid-sized feature branch exceeds both limits, and the tool blocks analysis entirely rather than truncating, so teams evaluating real PRs hit the wall immediately and must upgrade or abandon the session. Saving checklists is a paid-only feature, which means free-tier users cannot build a reusable QA knowledge base from historical analyses — the stated use case of accumulating institutional QA knowledge is unavailable without a paid account. There is no API and no self-hosted option, so teams that need to embed checklist generation inside a CI/CD pipeline or keep code diffs off third-party servers have no path forward with this tool — those teams evaluate GitHub Actions-native or self-hostable alternatives instead. Bitbucket and Jira integration are paid-only features, meaning teams using those platforms for change tracking cannot automate PR analysis at all on the free tier, which makes the tool a manual step rather than part of the development workflow until an account upgrade occurs.

Bottom line

Legioni is free while QALens is paid; Legioni is open source. Choose based on which difference matters most for your workflow.

Frequently asked questions

What is the difference between Legioni and QALens?

Legioni is Free and open source, while QALens is Paid. Compare pricing, free trial, API, platforms, and pros/cons in the table above on AIDiveForge.

Is Legioni better than QALens?

It depends on your workflow. Use the side-by-side attributes (pricing, open source, API, self-hosted, platforms) to decide. AIDiveForge does not rank a universal winner — we publish verified facts so you can choose.